'use client'

import { useState, useMemo, useCallback } from 'react'
import { useParams } from 'next/navigation'
import Link from 'next/link'
import type { Route } from 'next'
import { trpc } from '@/lib/trpc/client'
import { toast } from 'sonner'
import { cn } from '@/lib/utils'
import { Button } from '@/components/ui/button'
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs'
import { Skeleton } from '@/components/ui/skeleton'
import { Badge } from '@/components/ui/badge'
import { Checkbox } from '@/components/ui/checkbox'
import { Input } from '@/components/ui/input'
import { Switch } from '@/components/ui/switch'
import { Label } from '@/components/ui/label'
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from '@/components/ui/dropdown-menu'
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
  AlertDialogTrigger,
} from '@/components/ui/alert-dialog'
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from '@/components/ui/dialog'
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '@/components/ui/select'
import {
  ArrowLeft,
  Save,
  Loader2,
  ChevronDown,
  Play,
  Square,
  Archive,
  Layers,
  Users,
  CalendarDays,
  BarChart3,
  ClipboardList,
  Settings,
  Zap,
  Shield,
  UserPlus,
  CheckCircle2,
  AlertTriangle,
  FileText,
  Trophy,
  Clock,
  Send,
  Download,
  Plus,
  Trash2,
  ArrowRight,
  RotateCcw,
  X,
  Check,
  ChevronsUpDown,
  Search,
} from 'lucide-react'
import {
  Command,
  CommandEmpty,
  CommandGroup,
  CommandInput,
  CommandItem,
  CommandList,
} from '@/components/ui/command'
import {
  Popover,
  PopoverContent,
  PopoverTrigger,
} from '@/components/ui/popover'
import { ScrollArea } from '@/components/ui/scroll-area'
import { RoundConfigForm } from '@/components/admin/competition/round-config-form'
import { ProjectStatesTable } from '@/components/admin/round/project-states-table'
// SubmissionWindowManager removed — round dates + file requirements in Config are sufficient
import { FileRequirementsEditor } from '@/components/admin/round/file-requirements-editor'
import { FilteringDashboard } from '@/components/admin/round/filtering-dashboard'
import { CoverageReport } from '@/components/admin/assignment/coverage-report'
import { AssignmentPreviewSheet } from '@/components/admin/assignment/assignment-preview-sheet'
import { CsvExportDialog } from '@/components/shared/csv-export-dialog'
import { AnimatedCard } from '@/components/shared/animated-container'
import { DateTimePicker } from '@/components/ui/datetime-picker'
import { AddMemberDialog } from '@/components/admin/jury/add-member-dialog'
import { motion } from 'motion/react'

// ── Status & type config maps ──────────────────────────────────────────────
const roundStatusConfig = {
  ROUND_DRAFT: {
    label: 'Draft',
    bgClass: 'bg-gray-100 text-gray-700',
    dotClass: 'bg-gray-500',
    description: 'Not yet active. Configure before launching.',
  },
  ROUND_ACTIVE: {
    label: 'Active',
    bgClass: 'bg-emerald-100 text-emerald-700',
    dotClass: 'bg-emerald-500 animate-pulse',
    description: 'Round is live. Projects can be processed.',
  },
  ROUND_CLOSED: {
    label: 'Closed',
    bgClass: 'bg-blue-100 text-blue-700',
    dotClass: 'bg-blue-500',
    description: 'No longer accepting changes. Results are final.',
  },
  ROUND_ARCHIVED: {
    label: 'Archived',
    bgClass: 'bg-muted text-muted-foreground',
    dotClass: 'bg-muted-foreground',
    description: 'Historical record only.',
  },
} as const

const roundTypeConfig: Record<string, { label: string; color: string; description: string }> = {
  INTAKE: { label: 'Intake', color: 'bg-gray-100 text-gray-700', description: 'Collecting applications' },
  FILTERING: { label: 'Filtering', color: 'bg-amber-100 text-amber-700', description: 'AI + manual screening' },
  EVALUATION: { label: 'Evaluation', color: 'bg-blue-100 text-blue-700', description: 'Jury evaluation & scoring' },
  SUBMISSION: { label: 'Submission', color: 'bg-purple-100 text-purple-700', description: 'Document submission' },
  MENTORING: { label: 'Mentoring', color: 'bg-teal-100 text-teal-700', description: 'Mentor-guided development' },
  LIVE_FINAL: { label: 'Live Final', color: 'bg-red-100 text-red-700', description: 'Live presentations & voting' },
  DELIBERATION: { label: 'Deliberation', color: 'bg-indigo-100 text-indigo-700', description: 'Final jury deliberation' },
}

const stateColors: Record<string, string> = {
  PENDING: 'bg-gray-400',
  IN_PROGRESS: 'bg-blue-500',
  PASSED: 'bg-green-500',
  REJECTED: 'bg-red-500',
  COMPLETED: 'bg-emerald-500',
  WITHDRAWN: 'bg-orange-400',
}

// ═══════════════════════════════════════════════════════════════════════════
// Main Page Component
// ═══════════════════════════════════════════════════════════════════════════

export default function RoundDetailPage() {
  const params = useParams()
  const roundId = params.roundId as string

  const [config, setConfig] = useState<Record<string, unknown>>({})
  const [hasChanges, setHasChanges] = useState(false)
  const [activeTab, setActiveTab] = useState('overview')
  const [previewSheetOpen, setPreviewSheetOpen] = useState(false)
  const [exportOpen, setExportOpen] = useState(false)
  const [advanceDialogOpen, setAdvanceDialogOpen] = useState(false)
  const [aiRecommendations, setAiRecommendations] = useState<{
    STARTUP: Array<{ projectId: string; rank: number; score: number; category: string; strengths: string[]; concerns: string[]; recommendation: string }>
    BUSINESS_CONCEPT: Array<{ projectId: string; rank: number; score: number; category: string; strengths: string[]; concerns: string[]; recommendation: string }>
  } | null>(null)
  const [shortlistDialogOpen, setShortlistDialogOpen] = useState(false)
  const [createJuryOpen, setCreateJuryOpen] = useState(false)
  const [newJuryName, setNewJuryName] = useState('')
  const [addMemberOpen, setAddMemberOpen] = useState(false)
  const [closeAndAdvance, setCloseAndAdvance] = useState(false)

  const utils = trpc.useUtils()

  // ── Core data queries ──────────────────────────────────────────────────
  const { data: round, isLoading } = trpc.round.getById.useQuery(
    { id: roundId },
    { refetchInterval: 15_000, refetchOnWindowFocus: true },
  )
  const { data: projectStates } = trpc.roundEngine.getProjectStates.useQuery(
    { roundId },
    { refetchInterval: 10_000, refetchOnWindowFocus: true },
  )

  const competitionId = round?.competitionId ?? ''

  const { data: juryGroups } = trpc.juryGroup.list.useQuery(
    { competitionId },
    { enabled: !!competitionId, refetchInterval: 30_000, refetchOnWindowFocus: true },
  )
  const { data: fileRequirements } = trpc.file.listRequirements.useQuery(
    { roundId },
    { refetchInterval: 15_000, refetchOnWindowFocus: true },
  )

  // Fetch awards linked to this round
  const { data: competition } = trpc.competition.getById.useQuery(
    { id: competitionId },
    { enabled: !!competitionId, refetchInterval: 60_000 },
  )
  const programId = competition?.programId
  const { data: awards } = trpc.specialAward.list.useQuery(
    { programId: programId! },
    { enabled: !!programId, refetchInterval: 60_000 },
  )
  const roundAwards = awards?.filter((a) => a.evaluationRoundId === roundId) ?? []

  // Sync config from server when not dirty
  if (round && !hasChanges) {
    const roundConfig = (round.configJson as Record<string, unknown>) ?? {}
    if (JSON.stringify(roundConfig) !== JSON.stringify(config)) {
      setConfig(roundConfig)
    }
  }

  // ── Mutations ──────────────────────────────────────────────────────────
  const updateMutation = trpc.round.update.useMutation({
    onSuccess: () => {
      utils.round.getById.invalidate({ id: roundId })
      toast.success('Round configuration saved')
      setHasChanges(false)
    },
    onError: (err) => toast.error(err.message),
  })

  const activateMutation = trpc.roundEngine.activate.useMutation({
    onSuccess: () => {
      utils.round.getById.invalidate({ id: roundId })
      toast.success('Round activated')
    },
    onError: (err) => toast.error(err.message),
  })

  const closeMutation = trpc.roundEngine.close.useMutation({
    onSuccess: () => {
      utils.round.getById.invalidate({ id: roundId })
      toast.success('Round closed')
      if (closeAndAdvance) {
        setCloseAndAdvance(false)
        // Small delay to let cache invalidation complete before opening dialog
        setTimeout(() => setAdvanceDialogOpen(true), 300)
      }
    },
    onError: (err) => {
      setCloseAndAdvance(false)
      toast.error(err.message)
    },
  })

  const reopenMutation = trpc.roundEngine.reopen.useMutation({
    onSuccess: (data) => {
      utils.round.getById.invalidate({ id: roundId })
      utils.roundEngine.getProjectStates.invalidate({ roundId })
      const msg = data.pausedRounds?.length
        ? `Round reopened. Paused: ${data.pausedRounds.join(', ')}`
        : 'Round reopened'
      toast.success(msg)
    },
    onError: (err) => toast.error(err.message),
  })

  const archiveMutation = trpc.roundEngine.archive.useMutation({
    onSuccess: () => {
      utils.round.getById.invalidate({ id: roundId })
      toast.success('Round archived')
    },
    onError: (err) => toast.error(err.message),
  })

  const assignJuryMutation = trpc.round.update.useMutation({
    onSuccess: () => {
      utils.round.getById.invalidate({ id: roundId })
      utils.juryGroup.list.invalidate({ competitionId })
      toast.success('Jury group updated')
    },
    onError: (err) => toast.error(err.message),
  })

  // Jury group detail query (for the assigned group)
  const juryGroupId = round?.juryGroupId ?? ''
  const { data: juryGroupDetail } = trpc.juryGroup.getById.useQuery(
    { id: juryGroupId },
    { enabled: !!juryGroupId, refetchInterval: 10_000 },
  )

  const createJuryMutation = trpc.juryGroup.create.useMutation({
    onSuccess: (newGroup) => {
      utils.juryGroup.list.invalidate({ competitionId })
      // Auto-assign the new jury group to this round
      assignJuryMutation.mutate({ id: roundId, juryGroupId: newGroup.id })
      toast.success(`Jury "${newGroup.name}" created and assigned`)
      setCreateJuryOpen(false)
      setNewJuryName('')
    },
    onError: (err) => toast.error(err.message),
  })

  const deleteJuryMutation = trpc.juryGroup.delete.useMutation({
    onSuccess: (result) => {
      utils.juryGroup.list.invalidate({ competitionId })
      utils.round.getById.invalidate({ id: roundId })
      toast.success(`Jury "${result.name}" deleted`)
    },
    onError: (err) => toast.error(err.message),
  })

  const removeJuryMemberMutation = trpc.juryGroup.removeMember.useMutation({
    onSuccess: () => {
      if (juryGroupId) utils.juryGroup.getById.invalidate({ id: juryGroupId })
      toast.success('Member removed')
    },
    onError: (err) => toast.error(err.message),
  })

  const advanceMutation = trpc.round.advanceProjects.useMutation({
    onSuccess: (data) => {
      utils.round.getById.invalidate({ id: roundId })
      utils.roundEngine.getProjectStates.invalidate({ roundId })
      toast.success(`Advanced ${data.advancedCount} project(s) to ${data.targetRoundName}`)
      setAdvanceDialogOpen(false)
    },
    onError: (err) => toast.error(err.message),
  })

  const shortlistMutation = trpc.round.generateAIRecommendations.useMutation({
    onSuccess: (data) => {
      if (data.success) {
        setAiRecommendations(data.recommendations)
        toast.success(
          `AI recommendations generated: ${data.recommendations.STARTUP.length} startups, ${data.recommendations.BUSINESS_CONCEPT.length} concepts` +
          (data.tokensUsed ? ` (${data.tokensUsed} tokens)` : ''),
        )
      } else {
        toast.error(data.errors?.join('; ') || 'AI shortlist failed')
      }
      setShortlistDialogOpen(false)
    },
    onError: (err) => {
      toast.error(err.message)
      setShortlistDialogOpen(false)
    },
  })

  const isTransitioning = activateMutation.isPending || closeMutation.isPending || reopenMutation.isPending || archiveMutation.isPending

  const handleConfigChange = useCallback((newConfig: Record<string, unknown>) => {
    setConfig(newConfig)
    setHasChanges(true)
  }, [])

  const handleSave = useCallback(() => {
    updateMutation.mutate({ id: roundId, configJson: config })
  }, [roundId, config, updateMutation])

  // ── Computed values ────────────────────────────────────────────────────
  const projectCount = round?._count?.projectRoundStates ?? 0
  const stateCounts = useMemo(() =>
    projectStates?.reduce((acc: Record<string, number>, ps: any) => {
      acc[ps.state] = (acc[ps.state] || 0) + 1
      return acc
    }, {} as Record<string, number>) ?? {},
  [projectStates])
  const passedCount = stateCounts['PASSED'] ?? 0
  const juryGroup = round?.juryGroup
  const juryMemberCount = juryGroup?.members?.length ?? 0

  const isFiltering = round?.roundType === 'FILTERING'
  const isEvaluation = round?.roundType === 'EVALUATION'
  const hasJury = ['EVALUATION', 'LIVE_FINAL', 'DELIBERATION'].includes(round?.roundType ?? '')
  const hasAwards = hasJury

  const poolLink = `/admin/projects/pool?roundId=${roundId}&competitionId=${competitionId}` as Route

  // ── Loading state ──────────────────────────────────────────────────────
  if (isLoading) {
    return (
      <div className="space-y-6">
        {/* Header skeleton — dark gradient placeholder */}
        <div className="rounded-xl bg-gradient-to-r from-[#053d57]/20 to-[#0a5a7c]/20 p-6 animate-pulse">
          <div className="flex items-center gap-3">
            <Skeleton className="h-8 w-8 rounded bg-white/20" />
            <div className="space-y-2">
              <Skeleton className="h-7 w-64 bg-white/20" />
              <Skeleton className="h-4 w-40 bg-white/20" />
            </div>
          </div>
        </div>
        <div className="grid gap-3 grid-cols-2 sm:grid-cols-4">
          {[1, 2, 3, 4].map((i) => <Skeleton key={i} className="h-28 rounded-lg" />)}
        </div>
        <Skeleton className="h-10 w-full" />
        <Skeleton className="h-96 w-full rounded-lg" />
      </div>
    )
  }

  if (!round) {
    return (
      <div className="space-y-6">
        <div className="flex items-center gap-3">
          <Link href={'/admin/rounds' as Route}>
            <Button variant="ghost" size="icon" className="h-8 w-8" aria-label="Back">
              <ArrowLeft className="h-4 w-4" />
            </Button>
          </Link>
          <div>
            <h1 className="text-xl font-bold">Round Not Found</h1>
            <p className="text-sm text-muted-foreground">This round does not exist.</p>
          </div>
        </div>
      </div>
    )
  }

  const status = round.status as keyof typeof roundStatusConfig
  const statusCfg = roundStatusConfig[status] || roundStatusConfig.ROUND_DRAFT
  const typeCfg = roundTypeConfig[round.roundType] || roundTypeConfig.INTAKE

  // ── Readiness checklist ────────────────────────────────────────────────
  const readinessItems = [
    {
      label: 'Projects assigned',
      ready: projectCount > 0,
      detail: projectCount > 0 ? `${projectCount} projects` : 'No projects yet',
      action: projectCount === 0 ? poolLink : undefined,
      actionLabel: 'Assign Projects',
    },
    ...(hasJury
      ? [{
          label: 'Jury group set',
          ready: !!juryGroup,
          detail: juryGroup ? `${juryGroup.name} (${juryMemberCount} members)` : 'No jury group assigned',
          action: undefined as Route | undefined,
          actionLabel: undefined as string | undefined,
        }]
      : []),
    {
      label: 'Dates configured',
      ready: !!round.windowOpenAt && !!round.windowCloseAt,
      detail:
        round.windowOpenAt && round.windowCloseAt
          ? `${new Date(round.windowOpenAt).toLocaleDateString()} \u2014 ${new Date(round.windowCloseAt).toLocaleDateString()}`
          : 'No dates set \u2014 configure in Config tab',
      action: undefined as Route | undefined,
      actionLabel: undefined as string | undefined,
    },
    {
      label: 'File requirements set',
      ready: (fileRequirements?.length ?? 0) > 0,
      detail:
        (fileRequirements?.length ?? 0) > 0
          ? `${fileRequirements?.length} requirement(s)`
          : 'No file requirements \u2014 configure in Config tab',
      action: undefined as Route | undefined,
      actionLabel: undefined as string | undefined,
    },
  ]
  const readyCount = readinessItems.filter((i) => i.ready).length

  // ═════════════════════════════════════════════════════════════════════════
  // Render
  // ═════════════════════════════════════════════════════════════════════════

  return (
    <div className="space-y-6">
      {/* ===== HEADER — Dark Blue gradient banner ===== */}
      <motion.div
        initial={{ opacity: 0, y: -8 }}
        animate={{ opacity: 1, y: 0 }}
        transition={{ duration: 0.4, ease: 'easeOut' }}
        className="rounded-xl bg-gradient-to-r from-[#053d57] to-[#0a5a7c] p-5 sm:p-6 text-white shadow-lg"
      >
        <div className="flex flex-col gap-4 sm:flex-row sm:items-start sm:justify-between">
          <div className="flex items-start gap-3 min-w-0">
            <Link href={'/admin/rounds' as Route} className="mt-0.5 shrink-0">
              <Button variant="ghost" size="icon" className="h-8 w-8 text-white/80 hover:text-white hover:bg-white/10" aria-label="Back to rounds">
                <ArrowLeft className="h-4 w-4" />
              </Button>
            </Link>
            <div className="min-w-0">
              <div className="flex flex-wrap items-center gap-2.5">
                <h1 className="text-xl font-bold tracking-tight truncate">{round.name}</h1>
                <Badge variant="secondary" className="text-xs shrink-0 bg-white/15 text-white border-white/20 hover:bg-white/20">
                  {typeCfg.label}
                </Badge>

                {/* Status dropdown */}
                <DropdownMenu>
                  <DropdownMenuTrigger asChild>
                    <button
                      className={cn(
                        'inline-flex items-center gap-1.5 text-[11px] font-medium px-2.5 py-1 rounded-full transition-colors shrink-0',
                        'bg-white/15 text-white hover:bg-white/25',
                      )}
                    >
                      <span className={cn('h-1.5 w-1.5 rounded-full', statusCfg.dotClass)} />
                      {statusCfg.label}
                      <ChevronDown className="h-3 w-3" />
                    </button>
                  </DropdownMenuTrigger>
                  <DropdownMenuContent align="start">
                    {status === 'ROUND_DRAFT' && (
                      <DropdownMenuItem
                        onClick={() => activateMutation.mutate({ roundId })}
                        disabled={isTransitioning}
                      >
                        <Play className="h-4 w-4 mr-2 text-emerald-600" />
                        Activate Round
                      </DropdownMenuItem>
                    )}
                    {status === 'ROUND_ACTIVE' && (
                      <DropdownMenuItem
                        onClick={() => closeMutation.mutate({ roundId })}
                        disabled={isTransitioning}
                      >
                        <Square className="h-4 w-4 mr-2 text-blue-600" />
                        Close Round
                      </DropdownMenuItem>
                    )}
                    {status === 'ROUND_CLOSED' && (
                      <>
                        <DropdownMenuItem
                          onClick={() => reopenMutation.mutate({ roundId })}
                          disabled={isTransitioning}
                        >
                          <Play className="h-4 w-4 mr-2 text-emerald-600" />
                          Reopen Round
                        </DropdownMenuItem>
                        <DropdownMenuSeparator />
                        <DropdownMenuItem
                          onClick={() => archiveMutation.mutate({ roundId })}
                          disabled={isTransitioning}
                        >
                          <Archive className="h-4 w-4 mr-2" />
                          Archive Round
                        </DropdownMenuItem>
                      </>
                    )}
                    {isTransitioning && (
                      <div className="flex items-center gap-2 px-2 py-1.5 text-xs text-muted-foreground">
                        <Loader2 className="h-3 w-3 animate-spin" />
                        Updating...
                      </div>
                    )}
                  </DropdownMenuContent>
                </DropdownMenu>
              </div>
              <p className="text-sm text-white/60 mt-1">{typeCfg.description}</p>
            </div>
          </div>

          {/* Action buttons */}
          <div className="flex items-center gap-2 shrink-0 flex-wrap">
            {hasChanges && (
              <Button size="sm" onClick={handleSave} disabled={updateMutation.isPending} className="bg-white text-[#053d57] hover:bg-white/90">
                {updateMutation.isPending ? (
                  <Loader2 className="h-4 w-4 mr-1.5 animate-spin" />
                ) : (
                  <Save className="h-4 w-4 mr-1.5" />
                )}
                Save Config
              </Button>
            )}
            <Link href={poolLink}>
              <Button variant="outline" size="sm" className="border-white/40 bg-white/15 text-white hover:bg-white/30 hover:text-white">
                <Layers className="h-4 w-4 mr-1.5" />
                Project Pool
              </Button>
            </Link>
          </div>
        </div>
      </motion.div>

      {/* ===== STATS BAR — Accent-bordered cards ===== */}
      <div className="grid gap-3 grid-cols-2 sm:grid-cols-4">
        {/* Projects */}
        <AnimatedCard index={0}>
          <Card className="border-l-4 border-l-[#557f8c] hover:shadow-md transition-shadow">
            <CardContent className="pt-4 pb-3">
              <div className="flex items-center gap-2.5">
                <div className="rounded-full bg-[#557f8c]/10 p-1.5">
                  <Layers className="h-4 w-4 text-[#557f8c]" />
                </div>
                <span className="text-sm font-medium text-muted-foreground">Projects</span>
              </div>
              <p className="text-3xl font-bold mt-2">{projectCount}</p>
              <div className="flex flex-wrap gap-1.5 mt-1.5">
                {Object.entries(stateCounts).map(([state, count]) => (
                  <span key={state} className="text-[10px] text-muted-foreground">
                    {String(count)} {state.toLowerCase().replace('_', ' ')}
                  </span>
                ))}
              </div>
            </CardContent>
          </Card>
        </AnimatedCard>

        {/* Jury (with inline group selector) */}
        <AnimatedCard index={1}>
          <Card className="border-l-4 border-l-purple-500 hover:shadow-md transition-shadow">
            <CardContent className="pt-4 pb-3">
              <div className="flex items-center gap-2.5 mb-1" data-jury-select>
                <div className="rounded-full bg-purple-50 p-1.5">
                  <Users className="h-4 w-4 text-purple-500" />
                </div>
                <span className="text-sm font-medium text-muted-foreground">Jury</span>
              </div>
              {juryGroups && juryGroups.length > 0 ? (
                <Select
                  value={round.juryGroupId ?? '__none__'}
                  onValueChange={(value) => {
                    assignJuryMutation.mutate({
                      id: roundId,
                      juryGroupId: value === '__none__' ? null : value,
                    })
                  }}
                  disabled={assignJuryMutation.isPending}
                >
                  <SelectTrigger className="h-8 text-xs mt-1">
                    <SelectValue placeholder="Select jury group..." />
                  </SelectTrigger>
                  <SelectContent>
                    <SelectItem value="__none__">No jury assigned</SelectItem>
                    {juryGroups.map((jg: any) => (
                      <SelectItem key={jg.id} value={jg.id}>
                        {jg.name} ({jg._count?.members ?? 0} members)
                      </SelectItem>
                    ))}
                  </SelectContent>
                </Select>
              ) : juryGroup ? (
                <>
                  <p className="text-3xl font-bold mt-2">{juryMemberCount}</p>
                  <p className="text-xs text-muted-foreground truncate">{juryGroup.name}</p>
                </>
              ) : (
                <>
                  <p className="text-3xl font-bold mt-2 text-muted-foreground">&mdash;</p>
                  <p className="text-xs text-muted-foreground">No jury groups yet</p>
                </>
              )}
            </CardContent>
          </Card>
        </AnimatedCard>

        {/* Window */}
        <AnimatedCard index={2}>
          <Card className="border-l-4 border-l-emerald-500 hover:shadow-md transition-shadow">
            <CardContent className="pt-4 pb-3">
              <div className="flex items-center gap-2.5">
                <div className="rounded-full bg-emerald-50 p-1.5">
                  <CalendarDays className="h-4 w-4 text-emerald-500" />
                </div>
                <span className="text-sm font-medium text-muted-foreground">Window</span>
              </div>
              {round.windowOpenAt || round.windowCloseAt ? (
                <>
                  <p className="text-sm font-bold mt-2">
                    {round.windowOpenAt
                      ? new Date(round.windowOpenAt).toLocaleDateString()
                      : 'No start'}
                  </p>
                  <p className="text-xs text-muted-foreground">
                    {round.windowCloseAt
                      ? `Closes ${new Date(round.windowCloseAt).toLocaleDateString()}`
                      : 'No deadline'}
                  </p>
                </>
              ) : (
                <>
                  <p className="text-3xl font-bold mt-2 text-muted-foreground">&mdash;</p>
                  <p className="text-xs text-muted-foreground">No dates set</p>
                </>
              )}
            </CardContent>
          </Card>
        </AnimatedCard>

        {/* Advancement */}
        <AnimatedCard index={3}>
          <Card className="border-l-4 border-l-amber-500 hover:shadow-md transition-shadow">
            <CardContent className="pt-4 pb-3">
              <div className="flex items-center gap-2.5">
                <div className="rounded-full bg-amber-50 p-1.5">
                  <BarChart3 className="h-4 w-4 text-amber-500" />
                </div>
                <span className="text-sm font-medium text-muted-foreground">Advancement</span>
              </div>
              {round.advancementRules && round.advancementRules.length > 0 ? (
                <>
                  <p className="text-3xl font-bold mt-2">{round.advancementRules.length}</p>
                  <p className="text-xs text-muted-foreground">
                    {round.advancementRules.map((r: any) => r.ruleType.replace('_', ' ').toLowerCase()).join(', ')}
                  </p>
                </>
              ) : (
                <>
                  <p className="text-3xl font-bold mt-2 text-muted-foreground">&mdash;</p>
                  <p className="text-xs text-muted-foreground">Admin selection</p>
                </>
              )}
            </CardContent>
          </Card>
        </AnimatedCard>
      </div>

      {/* ===== TABS — Underline style ===== */}
      <Tabs value={activeTab} onValueChange={setActiveTab} className="space-y-4">
        <div className="border-b overflow-x-auto">
          <TabsList className="bg-transparent h-auto p-0 gap-0 w-full sm:w-auto">
            {[
              { value: 'overview', label: 'Overview', icon: Zap },
              { value: 'projects', label: 'Projects', icon: Layers },
              ...(isFiltering ? [{ value: 'filtering', label: 'Filtering', icon: Shield }] : []),
              ...(isEvaluation ? [{ value: 'assignments', label: 'Assignments', icon: ClipboardList }] : []),
              ...(hasJury ? [{ value: 'jury', label: 'Jury', icon: Users }] : []),
              { value: 'config', label: 'Config', icon: Settings },
              ...(hasAwards ? [{ value: 'awards', label: 'Awards', icon: Trophy }] : []),
            ].map((tab) => (
              <TabsTrigger
                key={tab.value}
                value={tab.value}
                className={cn(
                  'relative rounded-none border-b-2 border-transparent px-4 py-2.5 text-sm font-medium transition-all',
                  'data-[state=active]:border-b-[#de0f1e] data-[state=active]:text-[#053d57] data-[state=active]:font-semibold data-[state=active]:shadow-none',
                  'text-muted-foreground hover:text-foreground',
                  'bg-transparent data-[state=active]:bg-transparent',
                )}
              >
                <tab.icon className={cn('h-3.5 w-3.5 mr-1.5', activeTab === tab.value ? 'text-[#557f8c]' : '')} />
                {tab.label}
                {tab.value === 'awards' && roundAwards.length > 0 && (
                  <Badge variant="secondary" className="ml-1.5 h-5 min-w-5 text-[10px] px-1.5 bg-[#de0f1e] text-white">
                    {roundAwards.length}
                  </Badge>
                )}
              </TabsTrigger>
            ))}
          </TabsList>
        </div>

        {/* ═══════════ OVERVIEW TAB ═══════════ */}
        <TabsContent value="overview" className="space-y-6">
          {/* Readiness Checklist with Progress Ring */}
          <AnimatedCard index={0}>
            <Card>
              <CardHeader>
                <div className="flex items-center justify-between">
                  <div className="flex items-center gap-4">
                    {/* SVG Progress Ring */}
                    <div className="relative h-14 w-14 shrink-0">
                      <svg className="h-14 w-14 -rotate-90" viewBox="0 0 56 56">
                        <circle cx="28" cy="28" r="24" fill="none" stroke="currentColor" strokeWidth="3" className="text-muted/30" />
                        <circle
                          cx="28" cy="28" r="24" fill="none"
                          strokeWidth="3" strokeLinecap="round"
                          stroke={readyCount === readinessItems.length ? '#10b981' : '#de0f1e'}
                          strokeDasharray={`${(readyCount / readinessItems.length) * 150.8} 150.8`}
                          className="transition-all duration-700"
                        />
                      </svg>
                      <span className="absolute inset-0 flex items-center justify-center text-xs font-bold">
                        {readyCount}/{readinessItems.length}
                      </span>
                    </div>
                    <div>
                      <CardTitle className="text-base">Launch Readiness</CardTitle>
                      <CardDescription>
                        {readyCount === readinessItems.length
                          ? 'All checks passed — ready to go'
                          : `${readinessItems.length - readyCount} item(s) remaining`}
                      </CardDescription>
                    </div>
                  </div>
                  <Badge
                    variant={readyCount === readinessItems.length ? 'default' : 'secondary'}
                    className={cn(
                      'text-xs',
                      readyCount === readinessItems.length
                        ? 'bg-emerald-100 text-emerald-700'
                        : 'bg-amber-100 text-amber-700',
                    )}
                  >
                    {readyCount === readinessItems.length ? 'Ready' : 'Incomplete'}
                  </Badge>
                </div>
              </CardHeader>
              <CardContent>
                <div className="space-y-3">
                  {readinessItems.map((item) => (
                    <div key={item.label} className="flex items-start gap-3">
                      {item.ready ? (
                        <CheckCircle2 className="h-4 w-4 text-emerald-500 mt-0.5 shrink-0" />
                      ) : (
                        <AlertTriangle className="h-4 w-4 text-amber-500 mt-0.5 shrink-0" />
                      )}
                      <div className="flex-1 min-w-0">
                        <p className={cn('text-sm font-medium', item.ready && 'text-muted-foreground line-through opacity-60')}>
                          {item.label}
                        </p>
                        <p className="text-xs text-muted-foreground">{item.detail}</p>
                      </div>
                      {item.action && (
                        <Link href={item.action}>
                          <Button size="sm" className="shrink-0 text-xs bg-[#de0f1e] hover:bg-[#c00d1a] text-white">
                            {item.actionLabel}
                          </Button>
                        </Link>
                      )}
                    </div>
                  ))}
                </div>
              </CardContent>
            </Card>
          </AnimatedCard>

          {/* Quick Actions — Grouped & styled */}
          <AnimatedCard index={1}>
            <Card>
              <CardHeader>
                <CardTitle className="text-base">Quick Actions</CardTitle>
                <CardDescription>Common operations for this round</CardDescription>
              </CardHeader>
              <CardContent className="space-y-4">
                {/* Round Control Group */}
                {(status === 'ROUND_DRAFT' || status === 'ROUND_ACTIVE' || status === 'ROUND_CLOSED') && (
                  <div>
                    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground mb-2">Round Control</p>
                    <div className="grid gap-3 sm:grid-cols-2 lg:grid-cols-3">
                      {status === 'ROUND_DRAFT' && (
                        <AlertDialog>
                          <AlertDialogTrigger asChild>
                            <button className="flex items-start gap-3 p-4 rounded-lg border border-l-4 border-l-emerald-500 hover:-translate-y-0.5 hover:shadow-md transition-all text-left">
                              <Play className="h-5 w-5 text-emerald-600 mt-0.5 shrink-0" />
                              <div>
                                <p className="text-sm font-medium">Activate Round</p>
                                <p className="text-xs text-muted-foreground mt-0.5">
                                  Start this round and allow project processing
                                </p>
                              </div>
                            </button>
                          </AlertDialogTrigger>
                          <AlertDialogContent>
                            <AlertDialogHeader>
                              <AlertDialogTitle>Activate this round?</AlertDialogTitle>
                              <AlertDialogDescription>
                                The round will go live. Projects can be processed and jury members will be able to see their assignments.
                              </AlertDialogDescription>
                            </AlertDialogHeader>
                            <AlertDialogFooter>
                              <AlertDialogCancel>Cancel</AlertDialogCancel>
                              <AlertDialogAction onClick={() => activateMutation.mutate({ roundId })}>
                                Activate
                              </AlertDialogAction>
                            </AlertDialogFooter>
                          </AlertDialogContent>
                        </AlertDialog>
                      )}

                      {status === 'ROUND_ACTIVE' && (
                        <AlertDialog>
                          <AlertDialogTrigger asChild>
                            <button className="flex items-start gap-3 p-4 rounded-lg border border-l-4 border-l-blue-500 hover:-translate-y-0.5 hover:shadow-md transition-all text-left">
                              <Square className="h-5 w-5 text-blue-600 mt-0.5 shrink-0" />
                              <div>
                                <p className="text-sm font-medium">Close Round</p>
                                <p className="text-xs text-muted-foreground mt-0.5">
                                  Stop accepting changes and finalize results
                                </p>
                              </div>
                            </button>
                          </AlertDialogTrigger>
                          <AlertDialogContent>
                            <AlertDialogHeader>
                              <AlertDialogTitle>Close this round?</AlertDialogTitle>
                              <AlertDialogDescription>
                                No further changes will be accepted. You can reactivate later if needed.
                                {projectCount > 0 && (
                                  <span className="block mt-2">
                                    {projectCount} projects are currently in this round.
                                  </span>
                                )}
                              </AlertDialogDescription>
                            </AlertDialogHeader>
                            <AlertDialogFooter>
                              <AlertDialogCancel>Cancel</AlertDialogCancel>
                              <AlertDialogAction onClick={() => closeMutation.mutate({ roundId })}>
                                Close Round
                              </AlertDialogAction>
                            </AlertDialogFooter>
                          </AlertDialogContent>
                        </AlertDialog>
                      )}

                      {status === 'ROUND_CLOSED' && (
                        <AlertDialog>
                          <AlertDialogTrigger asChild>
                            <button className="flex items-start gap-3 p-4 rounded-lg border border-l-4 border-l-amber-500 bg-amber-50/30 hover:-translate-y-0.5 hover:shadow-md transition-all text-left">
                              <RotateCcw className="h-5 w-5 text-amber-600 mt-0.5 shrink-0" />
                              <div>
                                <p className="text-sm font-medium">Reopen Round</p>
                                <p className="text-xs text-muted-foreground mt-0.5">
                                  Reactivate this round. Any subsequent active rounds will be paused.
                                </p>
                              </div>
                            </button>
                          </AlertDialogTrigger>
                          <AlertDialogContent>
                            <AlertDialogHeader>
                              <AlertDialogTitle>Reopen this round?</AlertDialogTitle>
                              <AlertDialogDescription>
                                The round will become active again. Any rounds after this one that are currently active will be paused (closed) automatically.
                              </AlertDialogDescription>
                            </AlertDialogHeader>
                            <AlertDialogFooter>
                              <AlertDialogCancel>Cancel</AlertDialogCancel>
                              <AlertDialogAction onClick={() => reopenMutation.mutate({ roundId })}>
                                Reopen
                              </AlertDialogAction>
                            </AlertDialogFooter>
                          </AlertDialogContent>
                        </AlertDialog>
                      )}
                    </div>
                  </div>
                )}

                {/* Project Management Group */}
                <div>
                  <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground mb-2">Project Management</p>
                  <div className="grid gap-3 sm:grid-cols-2 lg:grid-cols-3">
                    <Link href={poolLink}>
                      <button className="flex items-start gap-3 p-4 rounded-lg border hover:-translate-y-0.5 hover:shadow-md transition-all text-left w-full">
                        <Layers className="h-5 w-5 text-[#557f8c] mt-0.5 shrink-0" />
                        <div>
                          <p className="text-sm font-medium">Assign Projects</p>
                          <p className="text-xs text-muted-foreground mt-0.5">
                            Add projects from the pool to this round
                          </p>
                        </div>
                      </button>
                    </Link>

                    <button
                      onClick={() => setActiveTab('projects')}
                      className="flex items-start gap-3 p-4 rounded-lg border hover:-translate-y-0.5 hover:shadow-md transition-all text-left"
                    >
                      <BarChart3 className="h-5 w-5 text-[#557f8c] mt-0.5 shrink-0" />
                      <div>
                        <p className="text-sm font-medium">Manage Projects</p>
                        <p className="text-xs text-muted-foreground mt-0.5">
                          View, filter, and transition project states
                        </p>
                      </div>
                    </button>

                    {/* Advance projects (always visible when projects exist) */}
                    {projectCount > 0 && (
                      <button
                        onClick={() => passedCount > 0
                          ? setAdvanceDialogOpen(true)
                          : toast.info('Mark projects as "Passed" first in the Projects tab')}
                        className={cn(
                          'flex items-start gap-3 p-4 rounded-lg border hover:-translate-y-0.5 hover:shadow-md transition-all text-left',
                          passedCount > 0
                            ? 'border-l-4 border-l-emerald-500 bg-emerald-50/30'
                            : 'border-dashed opacity-60',
                        )}
                      >
                        <ArrowRight className={cn('h-5 w-5 mt-0.5 shrink-0', passedCount > 0 ? 'text-emerald-600' : 'text-muted-foreground')} />
                        <div>
                          <p className="text-sm font-medium">Advance Projects</p>
                          <p className="text-xs text-muted-foreground mt-0.5">
                            {passedCount > 0
                              ? `Move ${passedCount} passed project(s) to the next round`
                              : 'Mark projects as "Passed" first, then advance'}
                          </p>
                        </div>
                        {passedCount > 0 && (
                          <Badge className="ml-auto shrink-0 bg-emerald-100 text-emerald-700 text-[10px]">{passedCount}</Badge>
                        )}
                      </button>
                    )}

                    {/* Close & Advance (active rounds with passed projects) */}
                    {status === 'ROUND_ACTIVE' && passedCount > 0 && (
                      <button
                        onClick={() => {
                          setCloseAndAdvance(true)
                          closeMutation.mutate({ roundId })
                        }}
                        disabled={isTransitioning}
                        className="flex items-start gap-3 p-4 rounded-lg border border-l-4 border-l-purple-500 bg-purple-50/30 hover:-translate-y-0.5 hover:shadow-md transition-all text-left"
                      >
                        <Square className="h-5 w-5 text-purple-600 mt-0.5 shrink-0" />
                        <div>
                          <p className="text-sm font-medium">Close & Advance</p>
                          <p className="text-xs text-muted-foreground mt-0.5">
                            Close this round and advance {passedCount} passed project(s) to the next round
                          </p>
                        </div>
                      </button>
                    )}

                    {/* Jury assignment for rounds that use jury */}
                    {hasJury && !juryGroup && (
                      <button
                        onClick={() => {
                          const el = document.querySelector('[data-jury-select]')
                          if (el) el.scrollIntoView({ behavior: 'smooth', block: 'center' })
                        }}
                        className="flex items-start gap-3 p-4 rounded-lg border border-l-4 border-l-amber-500 bg-amber-50/30 hover:-translate-y-0.5 hover:shadow-md transition-all text-left"
                      >
                        <UserPlus className="h-5 w-5 text-amber-600 mt-0.5 shrink-0" />
                        <div>
                          <p className="text-sm font-medium">Assign Jury Group</p>
                          <p className="text-xs text-muted-foreground mt-0.5">
                            No jury group assigned. Select one in the Jury card above.
                          </p>
                        </div>
                      </button>
                    )}

                    {/* Evaluation: manage assignments */}
                    {isEvaluation && (
                      <button
                        onClick={() => setActiveTab('assignments')}
                        className="flex items-start gap-3 p-4 rounded-lg border hover:-translate-y-0.5 hover:shadow-md transition-all text-left"
                      >
                        <ClipboardList className="h-5 w-5 text-[#557f8c] mt-0.5 shrink-0" />
                        <div>
                          <p className="text-sm font-medium">Manage Assignments</p>
                          <p className="text-xs text-muted-foreground mt-0.5">
                            Generate and review jury-project assignments
                          </p>
                        </div>
                      </button>
                    )}
                  </div>
                </div>

                {/* AI Tools Group */}
                {((isFiltering || isEvaluation) && projectCount > 0) && (
                  <div>
                    <p className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground mb-2">AI Tools</p>
                    <div className="grid gap-3 sm:grid-cols-2 lg:grid-cols-3">
                      {isFiltering && (
                        <button
                          onClick={() => setActiveTab('filtering')}
                          className="flex items-start gap-3 p-4 rounded-lg border bg-gradient-to-br from-purple-50/50 to-blue-50/50 hover:-translate-y-0.5 hover:shadow-md transition-all text-left"
                        >
                          <Shield className="h-5 w-5 text-purple-600 mt-0.5 shrink-0" />
                          <div>
                            <p className="text-sm font-medium">Run AI Filtering</p>
                            <p className="text-xs text-muted-foreground mt-0.5">
                              Screen projects with AI and manual review
                            </p>
                          </div>
                        </button>
                      )}

                      <button
                        onClick={() => setShortlistDialogOpen(true)}
                        className="flex items-start gap-3 p-4 rounded-lg border bg-gradient-to-br from-purple-50/50 to-blue-50/50 hover:-translate-y-0.5 hover:shadow-md transition-all text-left"
                        disabled={shortlistMutation.isPending}
                      >
                        <Zap className="h-5 w-5 text-purple-600 mt-0.5 shrink-0" />
                        <div>
                          <p className="text-sm font-medium">
                            {shortlistMutation.isPending ? 'Generating...' : 'AI Recommendations'}
                          </p>
                          <p className="text-xs text-muted-foreground mt-0.5">
                            Generate ranked shortlist per category using AI analysis
                          </p>
                        </div>
                      </button>
                    </div>
                  </div>
                )}
              </CardContent>
            </Card>
          </AnimatedCard>

          {/* Advance Projects Dialog */}
          <AdvanceProjectsDialog
            open={advanceDialogOpen}
            onOpenChange={setAdvanceDialogOpen}
            roundId={roundId}
            projectStates={projectStates}
            config={config}
            advanceMutation={advanceMutation}
            competitionRounds={competition?.rounds?.map((r: any) => ({
              id: r.id,
              name: r.name,
              sortOrder: r.sortOrder,
              roundType: r.roundType,
            }))}
            currentSortOrder={round?.sortOrder}
          />

          {/* AI Shortlist Confirmation Dialog */}
          <AlertDialog open={shortlistDialogOpen} onOpenChange={setShortlistDialogOpen}>
            <AlertDialogContent>
              <AlertDialogHeader>
                <AlertDialogTitle>Generate AI Recommendations?</AlertDialogTitle>
                <AlertDialogDescription>
                  The AI will analyze all project evaluations and generate a ranked shortlist
                  for each category independently.
                  {config.startupAdvanceCount ? (
                    <span className="block mt-1">
                      Startup target: top {String(config.startupAdvanceCount)}
                    </span>
                  ) : null}
                  {config.conceptAdvanceCount ? (
                    <span className="block">
                      Business Concept target: top {String(config.conceptAdvanceCount)}
                    </span>
                  ) : null}
                  {config.aiParseFiles ? (
                    <span className="block mt-1 text-amber-600">
                      Document parsing is enabled — the AI will read uploaded file contents.
                    </span>
                  ) : null}
                </AlertDialogDescription>
              </AlertDialogHeader>
              <AlertDialogFooter>
                <AlertDialogCancel>Cancel</AlertDialogCancel>
                <AlertDialogAction
                  onClick={() => shortlistMutation.mutate({ roundId })}
                  disabled={shortlistMutation.isPending}
                >
                  {shortlistMutation.isPending && <Loader2 className="h-4 w-4 mr-1.5 animate-spin" />}
                  Generate
                </AlertDialogAction>
              </AlertDialogFooter>
            </AlertDialogContent>
          </AlertDialog>

          {/* AI Recommendations Display */}
          {aiRecommendations && (
            <AIRecommendationsDisplay
              recommendations={aiRecommendations}
              onClear={() => setAiRecommendations(null)}
            />
          )}

          {/* Round Info + Project Breakdown */}
          <div className="grid gap-4 sm:grid-cols-2">
            <AnimatedCard index={2}>
              <Card>
                <CardHeader>
                  <CardTitle className="text-sm">Round Details</CardTitle>
                </CardHeader>
                <CardContent className="space-y-0 text-sm">
                  {[
                    { label: 'Type', value: <Badge variant="secondary" className={cn('text-xs', typeCfg.color)}>{typeCfg.label}</Badge> },
                    { label: 'Status', value: <span className="font-medium">{statusCfg.label}</span> },
                    { label: 'Sort Order', value: <span className="font-medium font-mono">{round.sortOrder}</span> },
                    ...(round.purposeKey ? [{ label: 'Purpose', value: <span className="font-medium">{round.purposeKey}</span> }] : []),
                    { label: 'Jury Group', value: <span className="font-medium">{juryGroup ? juryGroup.name : '\u2014'}</span> },
                    { label: 'Opens', value: <span className="font-medium">{round.windowOpenAt ? new Date(round.windowOpenAt).toLocaleString() : '\u2014'}</span> },
                    { label: 'Closes', value: <span className="font-medium">{round.windowCloseAt ? new Date(round.windowCloseAt).toLocaleString() : '\u2014'}</span> },
                  ].map((row, i) => (
                    <div key={row.label} className={cn('flex justify-between items-center py-2.5', i > 0 && 'border-t border-dotted border-muted')}>
                      <span className="text-muted-foreground">{row.label}</span>
                      {row.value}
                    </div>
                  ))}
                </CardContent>
              </Card>
            </AnimatedCard>

            <AnimatedCard index={3}>
              <Card>
                <CardHeader>
                  <div className="flex items-center justify-between">
                    <CardTitle className="text-sm">Project Breakdown</CardTitle>
                    {projectCount > 0 && (
                      <span className="text-xs font-mono text-muted-foreground">{projectCount} total</span>
                    )}
                  </div>
                </CardHeader>
                <CardContent>
                  {projectCount === 0 ? (
                    <p className="text-sm text-muted-foreground py-4 text-center">
                      No projects assigned yet
                    </p>
                  ) : (
                    <div className="space-y-3">
                      {['PENDING', 'IN_PROGRESS', 'PASSED', 'REJECTED', 'COMPLETED', 'WITHDRAWN'].map((state) => {
                        const count = stateCounts[state] || 0
                        if (count === 0) return null
                        const pct = ((count / projectCount) * 100).toFixed(0)
                        return (
                          <div key={state}>
                            <div className="flex justify-between text-xs mb-1.5">
                              <span className="text-muted-foreground capitalize font-medium">{state.toLowerCase().replace('_', ' ')}</span>
                              <span className="font-bold tabular-nums">{count} <span className="font-normal text-muted-foreground">({pct}%)</span></span>
                            </div>
                            <div className="h-2 bg-muted rounded-full overflow-hidden">
                              <div
                                className={cn('h-full rounded-full transition-all duration-500', stateColors[state])}
                                style={{ width: `${pct}%` }}
                              />
                            </div>
                          </div>
                        )
                      })}
                    </div>
                  )}
                </CardContent>
              </Card>
            </AnimatedCard>
          </div>
        </TabsContent>

        {/* ═══════════ PROJECTS TAB ═══════════ */}
        <TabsContent value="projects" className="space-y-4">
          <ProjectStatesTable competitionId={competitionId} roundId={roundId} />
        </TabsContent>

        {/* ═══════════ FILTERING TAB ═══════════ */}
        {isFiltering && (
          <TabsContent value="filtering" className="space-y-4">
            <FilteringDashboard competitionId={competitionId} roundId={roundId} />
          </TabsContent>
        )}

        {/* ═══════════ JURY TAB ═══════════ */}
        {hasJury && (
        <TabsContent value="jury" className="space-y-6">
          {/* Jury Group Selector + Create */}
          <Card>
            <CardHeader>
              <div className="flex items-center justify-between">
                <div>
                  <CardTitle className="text-base">Jury Group</CardTitle>
                  <CardDescription>
                    Select or create a jury group for this round
                  </CardDescription>
                </div>
                <div className="flex items-center gap-2">
                  <Button size="sm" variant="outline" onClick={() => setCreateJuryOpen(true)}>
                    <Plus className="h-4 w-4 mr-1.5" />
                    New Jury
                  </Button>
                </div>
              </div>
            </CardHeader>
            <CardContent>
              {juryGroups && juryGroups.length > 0 ? (
                <div className="space-y-4">
                  <Select
                    value={round.juryGroupId ?? '__none__'}
                    onValueChange={(value) => {
                      assignJuryMutation.mutate({
                        id: roundId,
                        juryGroupId: value === '__none__' ? null : value,
                      })
                    }}
                    disabled={assignJuryMutation.isPending}
                  >
                    <SelectTrigger className="w-full sm:w-80">
                      <SelectValue placeholder="Select jury group..." />
                    </SelectTrigger>
                    <SelectContent>
                      <SelectItem value="__none__">No jury assigned</SelectItem>
                      {juryGroups.map((jg: any) => (
                        <SelectItem key={jg.id} value={jg.id}>
                          {jg.name} ({jg._count?.members ?? 0} members)
                        </SelectItem>
                      ))}
                    </SelectContent>
                  </Select>

                  {/* Delete button for currently selected jury group */}
                  {round.juryGroupId && (
                    <AlertDialog>
                      <AlertDialogTrigger asChild>
                        <Button size="sm" variant="ghost" className="text-destructive hover:text-destructive">
                          <Trash2 className="h-4 w-4 mr-1.5" />
                          Delete &quot;{juryGroup?.name}&quot;
                        </Button>
                      </AlertDialogTrigger>
                      <AlertDialogContent>
                        <AlertDialogHeader>
                          <AlertDialogTitle>Delete jury group?</AlertDialogTitle>
                          <AlertDialogDescription>
                            This will permanently delete &quot;{juryGroup?.name}&quot; and remove all its members.
                            Rounds using this jury group will be unlinked. This action cannot be undone.
                          </AlertDialogDescription>
                        </AlertDialogHeader>
                        <AlertDialogFooter>
                          <AlertDialogCancel>Cancel</AlertDialogCancel>
                          <AlertDialogAction
                            onClick={() => deleteJuryMutation.mutate({ id: round.juryGroupId! })}
                            className="bg-destructive text-destructive-foreground hover:bg-destructive/90"
                            disabled={deleteJuryMutation.isPending}
                          >
                            {deleteJuryMutation.isPending && <Loader2 className="h-4 w-4 mr-1.5 animate-spin" />}
                            Delete Jury
                          </AlertDialogAction>
                        </AlertDialogFooter>
                      </AlertDialogContent>
                    </AlertDialog>
                  )}
                </div>
              ) : (
                <div className="flex flex-col items-center justify-center py-10 text-center">
                  <div className="rounded-full bg-purple-50 p-4 mb-4">
                    <Users className="h-8 w-8 text-purple-400" />
                  </div>
                  <p className="text-sm font-medium">No Jury Groups</p>
                  <p className="text-xs text-muted-foreground mt-1 max-w-sm">
                    Create a jury group to assign members who will evaluate projects in this round.
                  </p>
                  <Button size="sm" className="mt-4" onClick={() => setCreateJuryOpen(true)}>
                    <Plus className="h-4 w-4 mr-1.5" />
                    Create First Jury
                  </Button>
                </div>
              )}
            </CardContent>
          </Card>

          {/* Members list (only if a jury group is assigned) */}
          {juryGroupDetail && (
            <Card>
              <CardHeader>
                <div className="flex items-center justify-between">
                  <div>
                    <CardTitle className="text-base">
                      Members &mdash; {juryGroupDetail.name}
                    </CardTitle>
                    <CardDescription>
                      {juryGroupDetail.members.length} member{juryGroupDetail.members.length !== 1 ? 's' : ''}
                    </CardDescription>
                  </div>
                  <Button size="sm" onClick={() => setAddMemberOpen(true)}>
                    <UserPlus className="h-4 w-4 mr-1.5" />
                    Add Member
                  </Button>
                </div>
              </CardHeader>
              <CardContent>
                {juryGroupDetail.members.length === 0 ? (
                  <div className="flex flex-col items-center justify-center py-10 text-center">
                    <div className="rounded-full bg-muted p-4 mb-4">
                      <UserPlus className="h-8 w-8 text-muted-foreground" />
                    </div>
                    <p className="text-sm font-medium">No Members Yet</p>
                    <p className="text-xs text-muted-foreground mt-1">
                      Add jury members to start assigning projects for evaluation.
                    </p>
                    <Button size="sm" variant="outline" className="mt-4" onClick={() => setAddMemberOpen(true)}>
                      <UserPlus className="h-4 w-4 mr-1.5" />
                      Add First Member
                    </Button>
                  </div>
                ) : (
                  <div className="space-y-1">
                    {juryGroupDetail.members.map((member: any, idx: number) => (
                      <div
                        key={member.id}
                        className={cn(
                          'flex items-center justify-between py-2.5 px-3 rounded-md transition-colors',
                          idx % 2 === 1 && 'bg-muted/30',
                        )}
                      >
                        <div className="min-w-0 flex-1">
                          <p className="text-sm font-medium truncate">
                            {member.user.name || 'Unnamed User'}
                          </p>
                          <p className="text-xs text-muted-foreground truncate">{member.user.email}</p>
                        </div>
                        <AlertDialog>
                          <AlertDialogTrigger asChild>
                            <Button
                              variant="ghost"
                              size="icon"
                              className="h-7 w-7 text-destructive hover:text-destructive shrink-0"
                            >
                              <Trash2 className="h-3.5 w-3.5" />
                            </Button>
                          </AlertDialogTrigger>
                          <AlertDialogContent>
                            <AlertDialogHeader>
                              <AlertDialogTitle>Remove member?</AlertDialogTitle>
                              <AlertDialogDescription>
                                Remove {member.user.name || member.user.email} from {juryGroupDetail.name}?
                              </AlertDialogDescription>
                            </AlertDialogHeader>
                            <AlertDialogFooter>
                              <AlertDialogCancel>Cancel</AlertDialogCancel>
                              <AlertDialogAction
                                onClick={() => removeJuryMemberMutation.mutate({ id: member.id })}
                                className="bg-destructive text-destructive-foreground hover:bg-destructive/90"
                              >
                                Remove
                              </AlertDialogAction>
                            </AlertDialogFooter>
                          </AlertDialogContent>
                        </AlertDialog>
                      </div>
                    ))}
                  </div>
                )}
              </CardContent>
            </Card>
          )}

          {/* Create Jury Dialog */}
          <Dialog open={createJuryOpen} onOpenChange={setCreateJuryOpen}>
            <DialogContent>
              <DialogHeader>
                <DialogTitle>Create Jury Group</DialogTitle>
                <DialogDescription>
                  Create a new jury group for this competition. It will be automatically assigned to this round.
                </DialogDescription>
              </DialogHeader>
              <div className="space-y-4">
                <div className="space-y-2">
                  <label className="text-sm font-medium">Name</label>
                  <Input
                    placeholder="e.g. Round 1 Jury, Expert Panel, Final Jury"
                    value={newJuryName}
                    onChange={(e) => setNewJuryName(e.target.value)}
                    onKeyDown={(e) => {
                      if (e.key === 'Enter' && newJuryName.trim()) {
                        createJuryMutation.mutate({
                          competitionId,
                          name: newJuryName.trim(),
                          slug: newJuryName.trim().toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/(^-|-$)/g, ''),
                        })
                      }
                    }}
                  />
                </div>
              </div>
              <DialogFooter>
                <Button variant="outline" onClick={() => setCreateJuryOpen(false)}>Cancel</Button>
                <Button
                  onClick={() => {
                    createJuryMutation.mutate({
                      competitionId,
                      name: newJuryName.trim(),
                      slug: newJuryName.trim().toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/(^-|-$)/g, ''),
                    })
                  }}
                  disabled={createJuryMutation.isPending || !newJuryName.trim()}
                >
                  {createJuryMutation.isPending && <Loader2 className="h-4 w-4 mr-1.5 animate-spin" />}
                  Create
                </Button>
              </DialogFooter>
            </DialogContent>
          </Dialog>

          {/* Add Member Dialog */}
          {juryGroupId && (
            <AddMemberDialog
              juryGroupId={juryGroupId}
              open={addMemberOpen}
              onOpenChange={(open) => {
                setAddMemberOpen(open)
                if (!open) utils.juryGroup.getById.invalidate({ id: juryGroupId })
              }}
            />
          )}
        </TabsContent>
        )}

        {/* ═══════════ ASSIGNMENTS TAB (Evaluation rounds) ═══════════ */}
        {isEvaluation && (
          <TabsContent value="assignments" className="space-y-6">
            {/* Coverage Report */}
            <CoverageReport roundId={roundId} />

            {/* Generate Assignments */}
            <Card>
              <CardHeader>
                <div className="flex items-center justify-between">
                  <div>
                    <CardTitle className="text-base">Assignment Generation</CardTitle>
                    <CardDescription>
                      AI-suggested jury-to-project assignments based on expertise and workload
                    </CardDescription>
                  </div>
                  <Button
                    size="sm"
                    onClick={() => setPreviewSheetOpen(true)}
                    disabled={projectCount === 0 || !juryGroup}
                  >
                    <Zap className="h-4 w-4 mr-1.5" />
                    Generate Assignments
                  </Button>
                </div>
              </CardHeader>
              <CardContent>
                {!juryGroup && (
                  <div className="flex items-center gap-2 p-3 rounded-lg bg-amber-50 border border-amber-200 text-sm text-amber-800">
                    <AlertTriangle className="h-4 w-4 shrink-0" />
                    Assign a jury group first before generating assignments.
                  </div>
                )}
                {projectCount === 0 && (
                  <div className="flex items-center gap-2 p-3 rounded-lg bg-amber-50 border border-amber-200 text-sm text-amber-800">
                    <AlertTriangle className="h-4 w-4 shrink-0" />
                    Add projects to this round first.
                  </div>
                )}
                {juryGroup && projectCount > 0 && (
                  <p className="text-sm text-muted-foreground">
                    Click &quot;Generate Assignments&quot; to preview AI-suggested assignments.
                    You can review and execute them from the preview sheet.
                  </p>
                )}
              </CardContent>
            </Card>

            {/* Jury Progress + Score Distribution */}
            <div className="grid gap-4 lg:grid-cols-2">
              <JuryProgressTable roundId={roundId} />
              <ScoreDistribution roundId={roundId} />
            </div>

            {/* Actions: Send Reminders + Export */}
            <div className="flex flex-wrap items-center gap-3">
              <SendRemindersButton roundId={roundId} />
              <Button variant="outline" size="sm" onClick={() => setExportOpen(true)}>
                <Download className="h-4 w-4 mr-1.5" />
                Export Evaluations
              </Button>
            </div>

            {/* Individual Assignments Table */}
            <IndividualAssignmentsTable roundId={roundId} projectStates={projectStates} />

            {/* Unassigned Queue */}
            <RoundUnassignedQueue roundId={roundId} />

            {/* Assignment Preview Sheet */}
            <AssignmentPreviewSheet
              roundId={roundId}
              open={previewSheetOpen}
              onOpenChange={setPreviewSheetOpen}
            />

            {/* CSV Export Dialog */}
            <ExportEvaluationsDialog roundId={roundId} open={exportOpen} onOpenChange={setExportOpen} />
          </TabsContent>
        )}

        {/* ═══════════ CONFIG TAB ═══════════ */}
        <TabsContent value="config" className="space-y-6">
          {/* Round Dates */}
          <Card>
            <CardHeader className="border-b">
              <CardTitle className="text-base">Round Dates</CardTitle>
              <CardDescription>
                When this round starts and ends. Defines the active period for document uploads and evaluations.
              </CardDescription>
            </CardHeader>
            <CardContent className="pt-4">
              <div className="grid gap-4 sm:grid-cols-2">
                <div className="space-y-2">
                  <Label>Start Date</Label>
                  <DateTimePicker
                    value={round.windowOpenAt ? new Date(round.windowOpenAt) : null}
                    onChange={(date) => updateMutation.mutate({ id: roundId, windowOpenAt: date })}
                    placeholder="Select start date & time"
                    clearable
                  />
                </div>
                <div className="space-y-2">
                  <Label>End Date</Label>
                  <DateTimePicker
                    value={round.windowCloseAt ? new Date(round.windowCloseAt) : null}
                    onChange={(date) => updateMutation.mutate({ id: roundId, windowCloseAt: date })}
                    placeholder="Select end date & time"
                    clearable
                  />
                </div>
              </div>
            </CardContent>
          </Card>

          {/* General Round Settings */}
          <Card>
            <CardHeader className="border-b">
              <CardTitle className="text-base">General Settings</CardTitle>
              <CardDescription>Settings that apply to this round regardless of type</CardDescription>
            </CardHeader>
            <CardContent className="space-y-0 pt-0">
              <div className="flex items-center justify-between p-4 rounded-md">
                <div className="space-y-0.5">
                  <Label htmlFor="notify-on-entry" className="text-sm font-medium">
                    Notify on round entry
                  </Label>
                  <p className="text-xs text-muted-foreground">
                    Send an automated email to project applicants when their project enters this round
                  </p>
                </div>
                <Switch
                  id="notify-on-entry"
                  checked={!!config.notifyOnEntry}
                  onCheckedChange={(checked) => {
                    handleConfigChange({ ...config, notifyOnEntry: checked })
                  }}
                />
              </div>

              <div className="flex items-center justify-between p-4 rounded-md bg-muted/30">
                <div className="space-y-0.5">
                  <Label htmlFor="notify-on-advance" className="text-sm font-medium">
                    Notify on advance
                  </Label>
                  <p className="text-xs text-muted-foreground">
                    Send an email to project applicants when their project advances from this round to the next
                  </p>
                </div>
                <Switch
                  id="notify-on-advance"
                  checked={!!config.notifyOnAdvance}
                  onCheckedChange={(checked) => {
                    handleConfigChange({ ...config, notifyOnAdvance: checked })
                  }}
                />
              </div>

              <div className="flex items-center justify-between p-4 rounded-md">
                <div className="space-y-0.5">
                  <Label htmlFor="ai-parse-files" className="text-sm font-medium">
                    AI document parsing
                  </Label>
                  <p className="text-xs text-muted-foreground">
                    Allow AI to read the contents of uploaded files (PDF/text) for deeper analysis during filtering and evaluation
                  </p>
                </div>
                <Switch
                  id="ai-parse-files"
                  checked={!!config.aiParseFiles}
                  onCheckedChange={(checked) => {
                    handleConfigChange({ ...config, aiParseFiles: checked })
                  }}
                />
              </div>

              <div className="border-t mt-2 pt-4 px-4 pb-2 bg-[#053d57]/[0.03] rounded-b-lg -mx-6 -mb-6 p-6">
                <Label className="text-sm font-medium">Advancement Targets</Label>
                <p className="text-xs text-muted-foreground mb-3">
                  Target number of projects per category to advance from this round
                </p>
                <div className="grid grid-cols-2 gap-4">
                  <div className="space-y-1.5">
                    <Label htmlFor="startup-advance-count" className="text-xs text-muted-foreground">
                      Startup Projects
                    </Label>
                    <Input
                      id="startup-advance-count"
                      type="number"
                      min={0}
                      className="h-9"
                      placeholder="No limit"
                      value={(config.startupAdvanceCount as number) ?? ''}
                      onChange={(e) => {
                        const val = e.target.value ? parseInt(e.target.value, 10) : undefined
                        handleConfigChange({ ...config, startupAdvanceCount: val })
                      }}
                    />
                  </div>
                  <div className="space-y-1.5">
                    <Label htmlFor="concept-advance-count" className="text-xs text-muted-foreground">
                      Concept Projects
                    </Label>
                    <Input
                      id="concept-advance-count"
                      type="number"
                      min={0}
                      className="h-9"
                      placeholder="No limit"
                      value={(config.conceptAdvanceCount as number) ?? ''}
                      onChange={(e) => {
                        const val = e.target.value ? parseInt(e.target.value, 10) : undefined
                        handleConfigChange({ ...config, conceptAdvanceCount: val })
                      }}
                    />
                  </div>
                </div>
              </div>
            </CardContent>
          </Card>

          {/* Round-type-specific config */}
          <RoundConfigForm
            roundType={round.roundType}
            config={config}
            onChange={handleConfigChange}
            juryGroups={juryGroups?.map((jg: any) => ({ id: jg.id, name: jg.name }))}
          />

          {/* Evaluation Criteria Editor (EVALUATION rounds only) */}
          {isEvaluation && <EvaluationCriteriaEditor roundId={roundId} />}

          {/* Document Requirements */}
          <Card>
            <CardHeader>
              <CardTitle className="text-base">Document Requirements</CardTitle>
              <CardDescription>
                Files applicants must submit for this round
                {round.windowCloseAt && (
                  <> &mdash; due by {new Date(round.windowCloseAt).toLocaleDateString()}</>
                )}
              </CardDescription>
            </CardHeader>
            <CardContent>
              <FileRequirementsEditor
                roundId={roundId}
                windowOpenAt={round.windowOpenAt}
                windowCloseAt={round.windowCloseAt}
              />
            </CardContent>
          </Card>
        </TabsContent>

        {/* ═══════════ AWARDS TAB ═══════════ */}
        {hasAwards && (
        <TabsContent value="awards" className="space-y-4">
          <Card>
            <CardContent className="p-6">
              {roundAwards.length === 0 ? (
                <div className="text-center py-12 text-muted-foreground">
                  <div className="rounded-full bg-[#de0f1e]/10 p-4 w-fit mx-auto mb-4">
                    <Trophy className="h-8 w-8 text-[#de0f1e]/60" />
                  </div>
                  <p className="text-sm font-medium text-foreground">No Awards Linked</p>
                  <p className="text-xs mt-1 max-w-sm mx-auto">
                    Create an award and set this round as its evaluation round to see it here
                  </p>
                </div>
              ) : (
                <div className="space-y-3">
                  {roundAwards.map((award) => {
                    const eligibleCount = award._count?.eligibilities || 0
                    const autoTagRules = award.autoTagRulesJson as { rules?: unknown[] } | null
                    const ruleCount = autoTagRules?.rules?.length || 0

                    return (
                      <Link
                        key={award.id}
                        href={`/admin/awards/${award.id}` as Route}
                        className="block"
                      >
                        <div className="flex items-start justify-between gap-4 rounded-lg border border-l-4 border-l-[#de0f1e] p-4 transition-all hover:shadow-md hover:-translate-y-0.5">
                          <div className="flex-1 min-w-0">
                            <div className="flex items-center gap-2 mb-1">
                              <h3 className="font-medium truncate">{award.name}</h3>
                              <Badge
                                variant={
                                  award.eligibilityMode === 'SEPARATE_POOL'
                                    ? 'default'
                                    : 'secondary'
                                }
                                className="shrink-0"
                              >
                                {award.eligibilityMode === 'SEPARATE_POOL'
                                  ? 'Separate Pool'
                                  : 'Stay in Main'}
                              </Badge>
                            </div>
                            {award.description && (
                              <p className="text-sm text-muted-foreground line-clamp-1">
                                {award.description}
                              </p>
                            )}
                          </div>
                          <div className="flex items-center gap-4 text-sm text-muted-foreground shrink-0">
                            <div className="text-right">
                              <div className="font-medium text-foreground">{ruleCount}</div>
                              <div className="text-xs">{ruleCount === 1 ? 'rule' : 'rules'}</div>
                            </div>
                            <div className="text-right">
                              <div className="font-medium text-foreground">{eligibleCount}</div>
                              <div className="text-xs">eligible</div>
                            </div>
                          </div>
                        </div>
                      </Link>
                    )
                  })}
                </div>
              )}
            </CardContent>
          </Card>
        </TabsContent>
        )}
      </Tabs>
    </div>
  )
}

// ═══════════════════════════════════════════════════════════════════════════
// Sub-components
// ═══════════════════════════════════════════════════════════════════════════

// ── Unassigned projects queue ────────────────────────────────────────────

function RoundUnassignedQueue({ roundId }: { roundId: string }) {
  const { data: unassigned, isLoading } = trpc.roundAssignment.unassignedQueue.useQuery(
    { roundId, requiredReviews: 3 },
    { refetchInterval: 15_000 },
  )

  return (
    <Card>
      <CardHeader>
        <CardTitle className="text-base">Unassigned Projects</CardTitle>
        <CardDescription>Projects with fewer than 3 jury assignments</CardDescription>
      </CardHeader>
      <CardContent>
        {isLoading ? (
          <div className="space-y-2">
            {[1, 2, 3].map((i) => <Skeleton key={i} className="h-14 w-full" />)}
          </div>
        ) : unassigned && unassigned.length > 0 ? (
          <div className="space-y-2 max-h-[400px] overflow-y-auto">
            {unassigned.map((project: any) => (
              <div
                key={project.id}
                className={cn(
                  'flex justify-between items-center p-3 border rounded-md hover:bg-muted/30 transition-colors',
                  (project.assignmentCount || 0) === 0 && 'border-l-4 border-l-red-500',
                )}
              >
                <div className="min-w-0">
                  <p className="text-sm font-medium truncate">{project.title}</p>
                  <p className="text-xs text-muted-foreground">
                    {project.competitionCategory || 'No category'}
                    {project.teamName && ` \u00b7 ${project.teamName}`}
                  </p>
                </div>
                <Badge variant="outline" className={cn(
                  'text-xs shrink-0 ml-3',
                  (project.assignmentCount || 0) === 0
                    ? 'bg-red-50 text-red-700 border-red-200'
                    : 'bg-amber-50 text-amber-700 border-amber-200',
                )}>
                  {project.assignmentCount || 0} / 3
                </Badge>
              </div>
            ))}
          </div>
        ) : (
          <p className="text-sm text-muted-foreground text-center py-6">
            All projects have sufficient assignments
          </p>
        )}
      </CardContent>
    </Card>
  )
}

// ── Jury Progress Table ──────────────────────────────────────────────────

function JuryProgressTable({ roundId }: { roundId: string }) {
  const { data: workload, isLoading } = trpc.analytics.getJurorWorkload.useQuery(
    { roundId },
    { refetchInterval: 15_000 },
  )

  return (
    <Card>
      <CardHeader>
        <CardTitle className="text-base">Jury Progress</CardTitle>
        <CardDescription>Evaluation completion per juror</CardDescription>
      </CardHeader>
      <CardContent>
        {isLoading ? (
          <div className="space-y-3">
            {[1, 2, 3].map((i) => <Skeleton key={i} className="h-10 w-full" />)}
          </div>
        ) : !workload || workload.length === 0 ? (
          <p className="text-sm text-muted-foreground text-center py-6">
            No assignments yet
          </p>
        ) : (
          <div className="space-y-3 max-h-[350px] overflow-y-auto">
            {workload.map((juror) => {
              const pct = juror.completionRate
              const barGradient = pct === 100
                ? 'bg-gradient-to-r from-emerald-400 to-emerald-600'
                : pct >= 50
                  ? 'bg-gradient-to-r from-blue-400 to-blue-600'
                  : pct > 0
                    ? 'bg-gradient-to-r from-amber-400 to-amber-600'
                    : 'bg-gray-300'

              return (
                <div key={juror.id} className="space-y-1 hover:bg-muted/20 rounded px-1 py-0.5 -mx-1 transition-colors">
                  <div className="flex justify-between text-xs">
                    <span className="font-medium truncate max-w-[60%]">{juror.name}</span>
                    <span className="text-muted-foreground shrink-0 tabular-nums">
                      {juror.completed}/{juror.assigned} ({pct}%)
                    </span>
                  </div>
                  <div className="h-2 bg-muted rounded-full overflow-hidden">
                    <div
                      className={cn('h-full rounded-full transition-all duration-500', barGradient)}
                      style={{ width: `${pct}%` }}
                    />
                  </div>
                </div>
              )
            })}
          </div>
        )}
      </CardContent>
    </Card>
  )
}

// ── Score Distribution ───────────────────────────────────────────────────

function ScoreDistribution({ roundId }: { roundId: string }) {
  const { data: dist, isLoading } = trpc.analytics.getRoundScoreDistribution.useQuery(
    { roundId },
    { refetchInterval: 15_000 },
  )

  const maxCount = useMemo(() =>
    dist ? Math.max(...dist.globalDistribution.map((b) => b.count), 1) : 1,
  [dist])

  return (
    <Card>
      <CardHeader>
        <CardTitle className="text-base">Score Distribution</CardTitle>
        <CardDescription>
          {dist ? `${dist.totalEvaluations} evaluations \u2014 avg ${dist.averageGlobalScore.toFixed(1)}` : 'Loading...'}
        </CardDescription>
      </CardHeader>
      <CardContent>
        {isLoading ? (
          <div className="flex items-end gap-1 h-32">
            {Array.from({ length: 10 }).map((_, i) => <Skeleton key={i} className="flex-1 h-full" />)}
          </div>
        ) : !dist || dist.totalEvaluations === 0 ? (
          <p className="text-sm text-muted-foreground text-center py-6">
            No evaluations submitted yet
          </p>
        ) : (
          <div className="flex items-end gap-1 h-32">
            {dist.globalDistribution.map((bucket) => {
              const heightPct = (bucket.count / maxCount) * 100
              return (
                <div key={bucket.score} className="flex-1 flex flex-col items-center gap-1">
                  <span className="text-[9px] text-muted-foreground">{bucket.count || ''}</span>
                  <div className="w-full relative rounded-t" style={{ height: `${Math.max(heightPct, 2)}%` }}>
                    <div className={cn(
                      'absolute inset-0 rounded-t transition-all',
                      bucket.score <= 3 ? 'bg-red-400' :
                      bucket.score <= 6 ? 'bg-amber-400' :
                      'bg-emerald-400',
                    )} />
                  </div>
                  <span className="text-[10px] text-muted-foreground">{bucket.score}</span>
                </div>
              )
            })}
          </div>
        )}
      </CardContent>
    </Card>
  )
}

// ── Send Reminders Button ────────────────────────────────────────────────

function SendRemindersButton({ roundId }: { roundId: string }) {
  const [open, setOpen] = useState(false)
  const mutation = trpc.evaluation.triggerReminders.useMutation({
    onSuccess: (data) => {
      toast.success(`Sent ${data.sent} reminder(s)`)
      setOpen(false)
    },
    onError: (err) => toast.error(err.message),
  })

  return (
    <>
      <Button variant="outline" size="sm" onClick={() => setOpen(true)}>
        <Send className="h-4 w-4 mr-1.5" />
        Send Reminders
      </Button>
      <AlertDialog open={open} onOpenChange={setOpen}>
        <AlertDialogContent>
          <AlertDialogHeader>
            <AlertDialogTitle>Send evaluation reminders?</AlertDialogTitle>
            <AlertDialogDescription>
              This will send reminder emails to all jurors who have incomplete evaluations for this round.
            </AlertDialogDescription>
          </AlertDialogHeader>
          <AlertDialogFooter>
            <AlertDialogCancel>Cancel</AlertDialogCancel>
            <AlertDialogAction
              onClick={() => mutation.mutate({ roundId })}
              disabled={mutation.isPending}
            >
              {mutation.isPending && <Loader2 className="h-4 w-4 mr-1.5 animate-spin" />}
              Send Reminders
            </AlertDialogAction>
          </AlertDialogFooter>
        </AlertDialogContent>
      </AlertDialog>
    </>
  )
}

// ── Export Evaluations Dialog ─────────────────────────────────────────────

function ExportEvaluationsDialog({
  roundId,
  open,
  onOpenChange,
}: {
  roundId: string
  open: boolean
  onOpenChange: (open: boolean) => void
}) {
  const [exportData, setExportData] = useState<any>(undefined)
  const [isLoadingExport, setIsLoadingExport] = useState(false)
  const utils = trpc.useUtils()

  const handleRequestData = async () => {
    setIsLoadingExport(true)
    try {
      const data = await utils.export.evaluations.fetch({ roundId, includeDetails: true })
      setExportData(data)
      return data
    } finally {
      setIsLoadingExport(false)
    }
  }

  return (
    <CsvExportDialog
      open={open}
      onOpenChange={onOpenChange}
      exportData={exportData}
      isLoading={isLoadingExport}
      filename={`evaluations-${roundId}`}
      onRequestData={handleRequestData}
    />
  )
}

// ── Individual Assignments Table ─────────────────────────────────────────

function IndividualAssignmentsTable({
  roundId,
  projectStates,
}: {
  roundId: string
  projectStates: any[] | undefined
}) {
  const [addDialogOpen, setAddDialogOpen] = useState(false)
  const [selectedJurorId, setSelectedJurorId] = useState('')
  const [selectedProjectIds, setSelectedProjectIds] = useState<Set<string>>(new Set())
  const [jurorPopoverOpen, setJurorPopoverOpen] = useState(false)
  const [projectSearch, setProjectSearch] = useState('')

  const utils = trpc.useUtils()
  const { data: assignments, isLoading } = trpc.assignment.listByStage.useQuery(
    { roundId },
    { refetchInterval: 15_000 },
  )

  const { data: juryMembers } = trpc.user.getJuryMembers.useQuery(
    { roundId },
    { enabled: addDialogOpen },
  )

  const deleteMutation = trpc.assignment.delete.useMutation({
    onSuccess: () => {
      utils.assignment.listByStage.invalidate({ roundId })
      utils.roundEngine.getProjectStates.invalidate({ roundId })
      toast.success('Assignment removed')
    },
    onError: (err) => toast.error(err.message),
  })

  const createMutation = trpc.assignment.create.useMutation({
    onSuccess: () => {
      utils.assignment.listByStage.invalidate({ roundId })
      utils.roundEngine.getProjectStates.invalidate({ roundId })
      utils.user.getJuryMembers.invalidate({ roundId })
      toast.success('Assignment created')
      resetDialog()
    },
    onError: (err) => toast.error(err.message),
  })

  const bulkCreateMutation = trpc.assignment.bulkCreate.useMutation({
    onSuccess: (result) => {
      utils.assignment.listByStage.invalidate({ roundId })
      utils.roundEngine.getProjectStates.invalidate({ roundId })
      utils.user.getJuryMembers.invalidate({ roundId })
      toast.success(`${result.created} assignment(s) created`)
      resetDialog()
    },
    onError: (err) => toast.error(err.message),
  })

  const resetDialog = useCallback(() => {
    setAddDialogOpen(false)
    setSelectedJurorId('')
    setSelectedProjectIds(new Set())
    setProjectSearch('')
  }, [])

  const selectedJuror = useMemo(
    () => juryMembers?.find((j: any) => j.id === selectedJurorId),
    [juryMembers, selectedJurorId],
  )

  // Filter projects by search term
  const filteredProjects = useMemo(() => {
    const items = projectStates ?? []
    if (!projectSearch) return items
    const q = projectSearch.toLowerCase()
    return items.filter((ps: any) =>
      ps.project?.title?.toLowerCase().includes(q) ||
      ps.project?.teamName?.toLowerCase().includes(q) ||
      ps.project?.competitionCategory?.toLowerCase().includes(q)
    )
  }, [projectStates, projectSearch])

  // Existing assignments for the selected juror (to grey out already-assigned projects)
  const jurorExistingProjectIds = useMemo(() => {
    if (!selectedJurorId || !assignments) return new Set<string>()
    return new Set(
      assignments
        .filter((a: any) => a.userId === selectedJurorId)
        .map((a: any) => a.projectId)
    )
  }, [selectedJurorId, assignments])

  const toggleProject = useCallback((projectId: string) => {
    setSelectedProjectIds(prev => {
      const next = new Set(prev)
      if (next.has(projectId)) {
        next.delete(projectId)
      } else {
        next.add(projectId)
      }
      return next
    })
  }, [])

  const selectAllUnassigned = useCallback(() => {
    const unassigned = filteredProjects
      .filter((ps: any) => !jurorExistingProjectIds.has(ps.project?.id))
      .map((ps: any) => ps.project?.id)
      .filter(Boolean)
    setSelectedProjectIds(new Set(unassigned))
  }, [filteredProjects, jurorExistingProjectIds])

  const handleCreate = useCallback(() => {
    if (!selectedJurorId || selectedProjectIds.size === 0) return

    const projectIds = Array.from(selectedProjectIds)
    if (projectIds.length === 1) {
      createMutation.mutate({
        userId: selectedJurorId,
        projectId: projectIds[0],
        roundId,
      })
    } else {
      bulkCreateMutation.mutate({
        roundId,
        assignments: projectIds.map(projectId => ({
          userId: selectedJurorId,
          projectId,
        })),
      })
    }
  }, [selectedJurorId, selectedProjectIds, roundId, createMutation, bulkCreateMutation])

  const isMutating = createMutation.isPending || bulkCreateMutation.isPending

  return (
    <Card>
      <CardHeader>
        <div className="flex items-center justify-between">
          <div>
            <CardTitle className="text-base">All Assignments</CardTitle>
            <CardDescription>
              {assignments?.length ?? 0} individual jury-project assignments
            </CardDescription>
          </div>
          <Button size="sm" variant="outline" onClick={() => setAddDialogOpen(true)}>
            <Plus className="h-4 w-4 mr-1.5" />
            Add
          </Button>
        </div>
      </CardHeader>
      <CardContent>
        {isLoading ? (
          <div className="space-y-2">
            {[1, 2, 3, 4, 5].map((i) => <Skeleton key={i} className="h-12 w-full" />)}
          </div>
        ) : !assignments || assignments.length === 0 ? (
          <p className="text-sm text-muted-foreground text-center py-6">
            No assignments yet. Generate assignments or add one manually.
          </p>
        ) : (
          <div className="space-y-1 max-h-[500px] overflow-y-auto">
            <div className="grid grid-cols-[1fr_1fr_100px_60px] gap-2 text-xs text-muted-foreground font-medium px-3 py-2 sticky top-0 bg-background border-b">
              <span>Juror</span>
              <span>Project</span>
              <span>Status</span>
              <span />
            </div>
            {assignments.map((a: any, idx: number) => (
              <div
                key={a.id}
                className={cn(
                  'grid grid-cols-[1fr_1fr_100px_60px] gap-2 items-center px-3 py-2 rounded-md text-sm transition-colors',
                  idx % 2 === 1 ? 'bg-muted/20' : 'hover:bg-muted/20',
                )}
              >
                <span className="truncate">{a.user?.name || a.user?.email || 'Unknown'}</span>
                <span className="truncate text-muted-foreground">{a.project?.title || 'Unknown'}</span>
                <Badge
                  variant="outline"
                  className={cn(
                    'text-[10px] justify-center',
                    a.evaluation?.status === 'SUBMITTED'
                      ? 'bg-emerald-50 text-emerald-700 border-emerald-200'
                      : a.evaluation?.status === 'IN_PROGRESS'
                        ? 'bg-blue-50 text-blue-700 border-blue-200'
                        : 'bg-gray-50 text-gray-600 border-gray-200',
                  )}
                >
                  {a.evaluation?.status || 'PENDING'}
                </Badge>
                <Button
                  variant="ghost"
                  size="icon"
                  className="h-7 w-7"
                  onClick={() => deleteMutation.mutate({ id: a.id })}
                  disabled={deleteMutation.isPending}
                >
                  <Trash2 className="h-3.5 w-3.5 text-muted-foreground hover:text-red-500" />
                </Button>
              </div>
            ))}
          </div>
        )}
      </CardContent>

      {/* Add Assignment Dialog */}
      <Dialog open={addDialogOpen} onOpenChange={(open) => {
        if (!open) resetDialog()
        else setAddDialogOpen(true)
      }}>
        <DialogContent className="sm:max-w-[540px]">
          <DialogHeader>
            <DialogTitle>Add Assignment</DialogTitle>
            <DialogDescription>
              Select a juror and one or more projects to assign
            </DialogDescription>
          </DialogHeader>

          <div className="space-y-4">
            {/* Juror Selector */}
            <div className="space-y-2">
              <Label className="text-sm font-medium">Juror</Label>
              <Popover open={jurorPopoverOpen} onOpenChange={setJurorPopoverOpen}>
                <PopoverTrigger asChild>
                  <Button
                    variant="outline"
                    role="combobox"
                    aria-expanded={jurorPopoverOpen}
                    className="w-full justify-between font-normal"
                  >
                    {selectedJuror
                      ? (
                        <span className="flex items-center gap-2 truncate">
                          <span className="truncate">{selectedJuror.name || selectedJuror.email}</span>
                          <Badge variant="secondary" className="text-[10px] shrink-0">
                            {selectedJuror.currentAssignments}/{selectedJuror.maxAssignments ?? '\u221E'}
                          </Badge>
                        </span>
                      )
                      : <span className="text-muted-foreground">Select a jury member...</span>
                    }
                    <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
                  </Button>
                </PopoverTrigger>
                <PopoverContent className="w-[480px] p-0" align="start">
                  <Command>
                    <CommandInput placeholder="Search by name or email..." />
                    <CommandList>
                      <CommandEmpty>No jury members found.</CommandEmpty>
                      <CommandGroup>
                        {juryMembers?.map((juror: any) => {
                          const atCapacity = juror.maxAssignments !== null && juror.availableSlots === 0
                          return (
                            <CommandItem
                              key={juror.id}
                              value={`${juror.name ?? ''} ${juror.email}`}
                              disabled={atCapacity}
                              onSelect={() => {
                                setSelectedJurorId(juror.id === selectedJurorId ? '' : juror.id)
                                setSelectedProjectIds(new Set())
                                setJurorPopoverOpen(false)
                              }}
                            >
                              <Check
                                className={cn(
                                  'mr-2 h-4 w-4',
                                  selectedJurorId === juror.id ? 'opacity-100' : 'opacity-0',
                                )}
                              />
                              <div className="flex flex-1 items-center justify-between min-w-0">
                                <div className="min-w-0">
                                  <p className="text-sm font-medium truncate">
                                    {juror.name || 'Unnamed'}
                                  </p>
                                  <p className="text-xs text-muted-foreground truncate">
                                    {juror.email}
                                  </p>
                                </div>
                                <Badge
                                  variant={atCapacity ? 'destructive' : 'secondary'}
                                  className="text-[10px] ml-2 shrink-0"
                                >
                                  {juror.currentAssignments}/{juror.maxAssignments ?? '\u221E'}
                                  {atCapacity ? ' full' : ''}
                                </Badge>
                              </div>
                            </CommandItem>
                          )
                        })}
                      </CommandGroup>
                    </CommandList>
                  </Command>
                </PopoverContent>
              </Popover>
            </div>

            {/* Project Multi-Select */}
            <div className="space-y-2">
              <div className="flex items-center justify-between">
                <Label className="text-sm font-medium">
                  Projects
                  {selectedProjectIds.size > 0 && (
                    <span className="ml-1.5 text-muted-foreground font-normal">
                      ({selectedProjectIds.size} selected)
                    </span>
                  )}
                </Label>
                {selectedJurorId && (
                  <div className="flex items-center gap-2">
                    <Button
                      type="button"
                      variant="ghost"
                      size="sm"
                      className="h-7 text-xs"
                      onClick={selectAllUnassigned}
                    >
                      Select all
                    </Button>
                    {selectedProjectIds.size > 0 && (
                      <Button
                        type="button"
                        variant="ghost"
                        size="sm"
                        className="h-7 text-xs"
                        onClick={() => setSelectedProjectIds(new Set())}
                      >
                        Clear
                      </Button>
                    )}
                  </div>
                )}
              </div>

              {/* Search input */}
              <div className="relative">
                <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
                <Input
                  placeholder="Filter projects..."
                  value={projectSearch}
                  onChange={(e) => setProjectSearch(e.target.value)}
                  className="pl-9 h-9"
                />
              </div>

              {/* Project checklist */}
              <ScrollArea className="h-[240px] rounded-md border">
                <div className="p-2 space-y-0.5">
                  {!selectedJurorId ? (
                    <p className="text-sm text-muted-foreground text-center py-8">
                      Select a juror first
                    </p>
                  ) : filteredProjects.length === 0 ? (
                    <p className="text-sm text-muted-foreground text-center py-8">
                      No projects found
                    </p>
                  ) : (
                    filteredProjects.map((ps: any) => {
                      const project = ps.project
                      if (!project) return null
                      const alreadyAssigned = jurorExistingProjectIds.has(project.id)
                      const isSelected = selectedProjectIds.has(project.id)

                      return (
                        <label
                          key={project.id}
                          className={cn(
                            'flex items-center gap-3 rounded-md px-2.5 py-2 text-sm cursor-pointer transition-colors',
                            alreadyAssigned
                              ? 'opacity-50 cursor-not-allowed'
                              : isSelected
                                ? 'bg-accent'
                                : 'hover:bg-muted/50',
                          )}
                        >
                          <Checkbox
                            checked={isSelected}
                            disabled={alreadyAssigned}
                            onCheckedChange={() => toggleProject(project.id)}
                          />
                          <div className="flex flex-1 items-center justify-between min-w-0">
                            <span className="truncate">{project.title}</span>
                            <div className="flex items-center gap-1.5 shrink-0 ml-2">
                              {project.competitionCategory && (
                                <Badge variant="outline" className="text-[10px]">
                                  {project.competitionCategory === 'STARTUP'
                                    ? 'Startup'
                                    : project.competitionCategory === 'BUSINESS_CONCEPT'
                                      ? 'Concept'
                                      : project.competitionCategory}
                                </Badge>
                              )}
                              {alreadyAssigned && (
                                <Badge variant="secondary" className="text-[10px]">
                                  Assigned
                                </Badge>
                              )}
                            </div>
                          </div>
                        </label>
                      )
                    })
                  )}
                </div>
              </ScrollArea>
            </div>
          </div>

          <DialogFooter>
            <Button variant="outline" onClick={resetDialog}>
              Cancel
            </Button>
            <Button
              onClick={handleCreate}
              disabled={!selectedJurorId || selectedProjectIds.size === 0 || isMutating}
            >
              {isMutating && <Loader2 className="h-4 w-4 mr-1.5 animate-spin" />}
              {selectedProjectIds.size <= 1
                ? 'Create Assignment'
                : `Create ${selectedProjectIds.size} Assignments`
              }
            </Button>
          </DialogFooter>
        </DialogContent>
      </Dialog>
    </Card>
  )
}

// ── Evaluation Criteria Editor ───────────────────────────────────────────

// ── Advance Projects Dialog ─────────────────────────────────────────────

function AdvanceProjectsDialog({
  open,
  onOpenChange,
  roundId,
  projectStates,
  config,
  advanceMutation,
  competitionRounds,
  currentSortOrder,
}: {
  open: boolean
  onOpenChange: (open: boolean) => void
  roundId: string
  projectStates: any[] | undefined
  config: Record<string, unknown>
  advanceMutation: { mutate: (input: { roundId: string; projectIds?: string[]; targetRoundId?: string }) => void; isPending: boolean }
  competitionRounds?: Array<{ id: string; name: string; sortOrder: number; roundType: string }>
  currentSortOrder?: number
}) {
  // Target round selector
  const availableTargets = useMemo(() =>
    (competitionRounds ?? [])
      .filter((r) => r.sortOrder > (currentSortOrder ?? -1) && r.id !== roundId)
      .sort((a, b) => a.sortOrder - b.sortOrder),
  [competitionRounds, currentSortOrder, roundId])

  const [targetRoundId, setTargetRoundId] = useState<string>('')

  // Default to first available target when dialog opens
  if (open && !targetRoundId && availableTargets.length > 0) {
    setTargetRoundId(availableTargets[0].id)
  }
  const passedProjects = useMemo(() =>
    (projectStates ?? []).filter((ps: any) => ps.state === 'PASSED'),
  [projectStates])

  const startups = useMemo(() =>
    passedProjects.filter((ps: any) => ps.project?.competitionCategory === 'STARTUP'),
  [passedProjects])

  const concepts = useMemo(() =>
    passedProjects.filter((ps: any) => ps.project?.competitionCategory === 'BUSINESS_CONCEPT'),
  [passedProjects])

  const other = useMemo(() =>
    passedProjects.filter((ps: any) =>
      ps.project?.competitionCategory !== 'STARTUP' && ps.project?.competitionCategory !== 'BUSINESS_CONCEPT',
    ),
  [passedProjects])

  const startupCap = (config.startupAdvanceCount as number) || 0
  const conceptCap = (config.conceptAdvanceCount as number) || 0

  const [selected, setSelected] = useState<Set<string>>(new Set())

  // Reset selection when dialog opens
  if (open && selected.size === 0 && passedProjects.length > 0) {
    const initial = new Set<string>()
    // Auto-select all (or up to cap if configured)
    const startupSlice = startupCap > 0 ? startups.slice(0, startupCap) : startups
    const conceptSlice = conceptCap > 0 ? concepts.slice(0, conceptCap) : concepts
    for (const ps of startupSlice) initial.add(ps.project?.id)
    for (const ps of conceptSlice) initial.add(ps.project?.id)
    for (const ps of other) initial.add(ps.project?.id)
    setSelected(initial)
  }

  const toggleProject = (projectId: string) => {
    setSelected((prev) => {
      const next = new Set(prev)
      if (next.has(projectId)) next.delete(projectId)
      else next.add(projectId)
      return next
    })
  }

  const toggleAll = (projects: any[], on: boolean) => {
    setSelected((prev) => {
      const next = new Set(prev)
      for (const ps of projects) {
        if (on) next.add(ps.project?.id)
        else next.delete(ps.project?.id)
      }
      return next
    })
  }

  const handleAdvance = () => {
    const ids = Array.from(selected)
    if (ids.length === 0) return
    advanceMutation.mutate({
      roundId,
      projectIds: ids,
      ...(targetRoundId ? { targetRoundId } : {}),
    })
    onOpenChange(false)
    setSelected(new Set())
    setTargetRoundId('')
  }

  const handleClose = () => {
    onOpenChange(false)
    setSelected(new Set())
    setTargetRoundId('')
  }

  const renderCategorySection = (
    label: string,
    projects: any[],
    cap: number,
    badgeColor: string,
  ) => {
    const selectedInCategory = projects.filter((ps: any) => selected.has(ps.project?.id)).length
    const overCap = cap > 0 && selectedInCategory > cap

    return (
      <div className="space-y-2">
        <div className="flex items-center justify-between">
          <div className="flex items-center gap-2">
            <Checkbox
              checked={projects.length > 0 && projects.every((ps: any) => selected.has(ps.project?.id))}
              onCheckedChange={(checked) => toggleAll(projects, !!checked)}
            />
            <span className="text-sm font-medium">{label}</span>
            <Badge variant="secondary" className={cn('text-[10px]', badgeColor)}>
              {selectedInCategory}/{projects.length}
            </Badge>
            {cap > 0 && (
              <span className={cn('text-[10px]', overCap ? 'text-red-500 font-medium' : 'text-muted-foreground')}>
                (target: {cap})
              </span>
            )}
          </div>
        </div>
        {projects.length === 0 ? (
          <p className="text-xs text-muted-foreground pl-7">No passed projects in this category</p>
        ) : (
          <div className="space-y-1 pl-7">
            {projects.map((ps: any) => (
              <label
                key={ps.project?.id}
                className="flex items-center gap-2 p-2 rounded hover:bg-muted/30 cursor-pointer"
              >
                <Checkbox
                  checked={selected.has(ps.project?.id)}
                  onCheckedChange={() => toggleProject(ps.project?.id)}
                />
                <span className="text-sm truncate flex-1">{ps.project?.title || 'Untitled'}</span>
                {ps.project?.teamName && (
                  <span className="text-xs text-muted-foreground shrink-0">{ps.project.teamName}</span>
                )}
              </label>
            ))}
          </div>
        )}
      </div>
    )
  }

  return (
    <Dialog open={open} onOpenChange={handleClose}>
      <DialogContent className="max-w-lg max-h-[85vh] flex flex-col">
        <DialogHeader>
          <DialogTitle>Advance Projects</DialogTitle>
          <DialogDescription>
            Select which passed projects to advance.
            {selected.size} of {passedProjects.length} selected.
          </DialogDescription>
        </DialogHeader>

        {/* Target round selector */}
        {availableTargets.length > 0 && (
          <div className="space-y-2 pb-2 border-b">
            <Label className="text-sm">Advance to</Label>
            <Select value={targetRoundId} onValueChange={setTargetRoundId}>
              <SelectTrigger>
                <SelectValue placeholder="Select target round" />
              </SelectTrigger>
              <SelectContent>
                {availableTargets.map((r) => (
                  <SelectItem key={r.id} value={r.id}>
                    {r.name} ({r.roundType.replace('_', ' ').toLowerCase()})
                  </SelectItem>
                ))}
              </SelectContent>
            </Select>
          </div>
        )}
        {availableTargets.length === 0 && (
          <div className="text-sm text-amber-600 bg-amber-50 rounded-md p-3">
            No subsequent rounds found. Projects will advance to the next round by sort order.
          </div>
        )}

        <div className="flex-1 overflow-y-auto space-y-4 py-2">
          {renderCategorySection('Startup', startups, startupCap, 'bg-blue-100 text-blue-700')}
          {renderCategorySection('Business Concept', concepts, conceptCap, 'bg-purple-100 text-purple-700')}
          {other.length > 0 && renderCategorySection('Other / Uncategorized', other, 0, 'bg-gray-100 text-gray-700')}
        </div>

        <DialogFooter>
          <Button variant="outline" onClick={handleClose}>Cancel</Button>
          <Button
            onClick={handleAdvance}
            disabled={selected.size === 0 || advanceMutation.isPending}
          >
            {advanceMutation.isPending && <Loader2 className="h-4 w-4 mr-1.5 animate-spin" />}
            Advance {selected.size} Project{selected.size !== 1 ? 's' : ''}
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  )
}

// ── AI Recommendations Display ──────────────────────────────────────────

type RecommendationItem = {
  projectId: string
  rank: number
  score: number
  category: string
  strengths: string[]
  concerns: string[]
  recommendation: string
}

function AIRecommendationsDisplay({
  recommendations,
  onClear,
}: {
  recommendations: { STARTUP: RecommendationItem[]; BUSINESS_CONCEPT: RecommendationItem[] }
  onClear: () => void
}) {
  const [expandedId, setExpandedId] = useState<string | null>(null)

  const renderCategory = (label: string, items: RecommendationItem[], colorClass: string) => {
    if (items.length === 0) return (
      <div className="text-center py-4 text-muted-foreground text-sm">
        No {label.toLowerCase()} projects evaluated
      </div>
    )

    return (
      <div className="space-y-2">
        {items.map((item) => {
          const isExpanded = expandedId === `${item.category}-${item.projectId}`
          return (
            <div
              key={item.projectId}
              className="border rounded-lg overflow-hidden"
            >
              <button
                onClick={() => setExpandedId(isExpanded ? null : `${item.category}-${item.projectId}`)}
                className="w-full flex items-center gap-3 p-3 text-left hover:bg-muted/30 transition-colors"
              >
                <span className={cn(
                  'h-7 w-7 rounded-full flex items-center justify-center text-xs font-bold text-white shrink-0 shadow-sm',
                  colorClass === 'bg-blue-500' ? 'bg-gradient-to-br from-blue-400 to-blue-600' : 'bg-gradient-to-br from-purple-400 to-purple-600',
                )}>
                  {item.rank}
                </span>
                <div className="flex-1 min-w-0">
                  <p className="text-sm font-medium truncate">{item.projectId}</p>
                  <p className="text-xs text-muted-foreground truncate">{item.recommendation}</p>
                </div>
                <Badge variant="outline" className="shrink-0 text-xs font-mono">
                  {item.score}/100
                </Badge>
                <ChevronDown className={cn(
                  'h-4 w-4 text-muted-foreground transition-transform shrink-0',
                  isExpanded && 'rotate-180',
                )} />
              </button>
              {isExpanded && (
                <div className="px-3 pb-3 pt-0 space-y-2 border-t bg-muted/10">
                  <div className="pt-2">
                    <p className="text-xs font-medium text-emerald-700 mb-1">Strengths</p>
                    <ul className="text-xs text-muted-foreground space-y-0.5 pl-4 list-disc">
                      {item.strengths.map((s, i) => <li key={i}>{s}</li>)}
                    </ul>
                  </div>
                  {item.concerns.length > 0 && (
                    <div>
                      <p className="text-xs font-medium text-amber-700 mb-1">Concerns</p>
                      <ul className="text-xs text-muted-foreground space-y-0.5 pl-4 list-disc">
                        {item.concerns.map((c, i) => <li key={i}>{c}</li>)}
                      </ul>
                    </div>
                  )}
                  <div>
                    <p className="text-xs font-medium text-blue-700 mb-1">Recommendation</p>
                    <p className="text-xs text-muted-foreground">{item.recommendation}</p>
                  </div>
                </div>
              )}
            </div>
          )
        })}
      </div>
    )
  }

  return (
    <Card>
      <CardHeader>
        <div className="flex items-center justify-between">
          <div>
            <CardTitle className="text-base">AI Shortlist Recommendations</CardTitle>
            <CardDescription>
              Ranked independently per category — {recommendations.STARTUP.length} startups, {recommendations.BUSINESS_CONCEPT.length} concepts
            </CardDescription>
          </div>
          <Button variant="ghost" size="sm" onClick={onClear}>
            <X className="h-4 w-4 mr-1" />
            Dismiss
          </Button>
        </div>
      </CardHeader>
      <CardContent>
        <div className="grid gap-6 lg:grid-cols-2">
          <div>
            <h4 className="text-sm font-semibold mb-3 flex items-center gap-2">
              <div className="h-2 w-2 rounded-full bg-blue-500" />
              Startup ({recommendations.STARTUP.length})
            </h4>
            {renderCategory('Startup', recommendations.STARTUP, 'bg-blue-500')}
          </div>
          <div>
            <h4 className="text-sm font-semibold mb-3 flex items-center gap-2">
              <div className="h-2 w-2 rounded-full bg-purple-500" />
              Business Concept ({recommendations.BUSINESS_CONCEPT.length})
            </h4>
            {renderCategory('Business Concept', recommendations.BUSINESS_CONCEPT, 'bg-purple-500')}
          </div>
        </div>
      </CardContent>
    </Card>
  )
}

// ── Evaluation Criteria Editor ───────────────────────────────────────────

function EvaluationCriteriaEditor({ roundId }: { roundId: string }) {
  const [editing, setEditing] = useState(false)
  const [criteria, setCriteria] = useState<Array<{
    id: string; label: string; description?: string; weight?: number; minScore?: number; maxScore?: number
  }>>([])

  const utils = trpc.useUtils()
  const { data: form, isLoading } = trpc.evaluation.getForm.useQuery(
    { roundId },
    { refetchInterval: 30_000 },
  )

  const upsertMutation = trpc.evaluation.upsertForm.useMutation({
    onSuccess: () => {
      utils.evaluation.getForm.invalidate({ roundId })
      toast.success('Evaluation criteria saved')
      setEditing(false)
    },
    onError: (err) => toast.error(err.message),
  })

  // Sync from server
  if (form && !editing) {
    const serverCriteria = form.criteriaJson ?? []
    if (JSON.stringify(serverCriteria) !== JSON.stringify(criteria)) {
      setCriteria(serverCriteria)
    }
  }

  const handleAdd = () => {
    setCriteria([...criteria, {
      id: `c-${Date.now()}-${Math.random().toString(36).slice(2, 6)}`,
      label: '',
      description: '',
      weight: 1,
      minScore: 0,
      maxScore: 10,
    }])
    setEditing(true)
  }

  const handleRemove = (id: string) => {
    setCriteria(criteria.filter((c) => c.id !== id))
  }

  const handleChange = (id: string, field: string, value: string | number) => {
    setCriteria(criteria.map((c) =>
      c.id === id ? { ...c, [field]: value } : c,
    ))
    setEditing(true)
  }

  const handleSave = () => {
    const validCriteria = criteria.filter((c) => c.label.trim())
    if (validCriteria.length === 0) {
      toast.error('Add at least one criterion')
      return
    }
    upsertMutation.mutate({ roundId, criteria: validCriteria })
  }

  return (
    <Card>
      <CardHeader>
        <div className="flex items-center justify-between">
          <div>
            <CardTitle className="text-base">Evaluation Criteria</CardTitle>
            <CardDescription>
              {form ? `Version ${form.version} \u2014 ${form.criteriaJson.length} criteria` : 'No criteria defined yet'}
            </CardDescription>
          </div>
          <div className="flex items-center gap-2">
            {editing && (
              <Button size="sm" variant="outline" onClick={() => {
                setEditing(false)
                if (form) setCriteria(form.criteriaJson)
              }}>
                Cancel
              </Button>
            )}
            {editing ? (
              <Button size="sm" onClick={handleSave} disabled={upsertMutation.isPending}>
                {upsertMutation.isPending && <Loader2 className="h-4 w-4 mr-1.5 animate-spin" />}
                Save Criteria
              </Button>
            ) : (
              <Button size="sm" variant="outline" onClick={handleAdd}>
                <Plus className="h-4 w-4 mr-1.5" />
                Add Criterion
              </Button>
            )}
          </div>
        </div>
      </CardHeader>
      <CardContent>
        {isLoading ? (
          <div className="space-y-3">
            {[1, 2, 3].map((i) => <Skeleton key={i} className="h-16 w-full" />)}
          </div>
        ) : criteria.length === 0 ? (
          <div className="text-center py-6 text-muted-foreground">
            <FileText className="h-8 w-8 mx-auto mb-2 opacity-40" />
            <p className="text-sm">No evaluation criteria defined</p>
            <p className="text-xs mt-1">Add criteria that jurors will use to score projects</p>
          </div>
        ) : (
          <div className="space-y-3">
            {criteria.map((c, idx) => (
              <div key={c.id} className="flex gap-3 items-start p-3 border rounded-lg bg-muted/20">
                <span className="text-xs text-muted-foreground font-mono mt-2.5 shrink-0 w-5 text-center">
                  {idx + 1}
                </span>
                <div className="flex-1 space-y-2">
                  <Input
                    placeholder="Criterion label (e.g., Innovation)"
                    value={c.label}
                    onChange={(e) => handleChange(c.id, 'label', e.target.value)}
                    className="h-8 text-sm"
                  />
                  <Input
                    placeholder="Description (optional)"
                    value={c.description || ''}
                    onChange={(e) => handleChange(c.id, 'description', e.target.value)}
                    className="h-7 text-xs"
                  />
                  <div className="flex gap-2">
                    <div className="flex-1">
                      <Label className="text-[10px] text-muted-foreground">Weight</Label>
                      <Input
                        type="number"
                        min={0}
                        max={100}
                        value={c.weight ?? 1}
                        onChange={(e) => handleChange(c.id, 'weight', Number(e.target.value))}
                        className="h-7 text-xs"
                      />
                    </div>
                    <div className="flex-1">
                      <Label className="text-[10px] text-muted-foreground">Min Score</Label>
                      <Input
                        type="number"
                        min={0}
                        value={c.minScore ?? 0}
                        onChange={(e) => handleChange(c.id, 'minScore', Number(e.target.value))}
                        className="h-7 text-xs"
                      />
                    </div>
                    <div className="flex-1">
                      <Label className="text-[10px] text-muted-foreground">Max Score</Label>
                      <Input
                        type="number"
                        min={1}
                        value={c.maxScore ?? 10}
                        onChange={(e) => handleChange(c.id, 'maxScore', Number(e.target.value))}
                        className="h-7 text-xs"
                      />
                    </div>
                  </div>
                </div>
                <Button
                  variant="ghost"
                  size="icon"
                  className="h-7 w-7 mt-1 shrink-0"
                  onClick={() => { handleRemove(c.id); setEditing(true) }}
                >
                  <X className="h-3.5 w-3.5 text-muted-foreground hover:text-red-500" />
                </Button>
              </div>
            ))}
            {!editing && (
              <Button variant="outline" size="sm" className="w-full" onClick={handleAdd}>
                <Plus className="h-4 w-4 mr-1.5" />
                Add Criterion
              </Button>
            )}
          </div>
        )}
      </CardContent>
    </Card>
  )
}