import Link from 'next/link';
import {
  Bell,
  Briefcase,
  Database,
  FileText,
  HardDrive,
  Inbox,
  Key,
  LayoutDashboard,
  Mail,
  Palette,
  ScrollText,
  Settings,
  Shield,
  Sliders,
  Tag,
  Upload,
  Users,
  UsersRound,
  Webhook,
  Globe,
} from 'lucide-react';

import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
import { PageHeader } from '@/components/shared/page-header';

interface AdminSection {
  href: string;
  label: string;
  description: string;
  icon: typeof Settings;
}

interface AdminGroup {
  title: string;
  description: string;
  sections: AdminSection[];
}

const GROUPS: AdminGroup[] = [
  {
    title: 'Access',
    description: 'Who can sign in and what they can do once they do.',
    sections: [
      {
        href: 'users',
        label: 'Users',
        description: 'CRM accounts, role assignments, and per-user residential access toggles.',
        icon: Users,
      },
      {
        href: 'invitations',
        label: 'Invitations',
        description: 'Send invitations, track pending invites, and resend or revoke them.',
        icon: Mail,
      },
      {
        href: 'roles',
        label: 'Roles & Permissions',
        description: 'Default permission sets and per-port role overrides.',
        icon: Shield,
      },
    ],
  },
  {
    title: 'Configuration',
    description: 'Branding, integrations, and per-port settings.',
    sections: [
      {
        href: 'email',
        label: 'Email Settings',
        description: 'From address, signatures, and per-port SMTP overrides.',
        icon: Mail,
      },
      {
        href: 'documenso',
        label: 'Documenso & EOI',
        description: 'API credentials, EOI template, and default in-app vs Documenso pathway.',
        icon: FileText,
      },
      {
        href: 'reminders',
        label: 'Reminders',
        description: 'Default reminder behaviour and the daily-digest delivery window.',
        icon: Bell,
      },
      {
        href: 'branding',
        label: 'Branding',
        description: 'App name, logo, primary color, and email header/footer HTML.',
        icon: Palette,
      },
      {
        href: 'settings',
        label: 'System Settings',
        description: 'Generic key/value configuration store for advanced flags.',
        icon: Settings,
      },
      {
        href: 'webhooks',
        label: 'Webhooks',
        description: 'Outgoing webhook subscriptions, secrets, and delivery log.',
        icon: Webhook,
      },
    ],
  },
  {
    title: 'Content',
    description: 'Forms, templates, and labels that users see.',
    sections: [
      {
        href: 'forms',
        label: 'Forms',
        description: 'Form templates used by client-facing inquiry and intake flows.',
        icon: Sliders,
      },
      {
        href: 'templates',
        label: 'Document Templates',
        description: 'PDF + email templates with merge-field placeholders.',
        icon: FileText,
      },
      {
        href: 'email-templates',
        label: 'Email Templates',
        description: 'Customize subject lines for transactional emails (portal, inquiry, invite).',
        icon: Mail,
      },
      {
        href: 'tags',
        label: 'Tags',
        description: 'Color-coded tags applied to clients, yachts, companies, and interests.',
        icon: Tag,
      },
      {
        href: 'custom-fields',
        label: 'Custom Fields',
        description: 'Tenant-defined fields for clients, yachts, and reservations.',
        icon: Key,
      },
    ],
  },
  {
    title: 'Data Quality',
    description: 'Cleanup, imports, and the audit trail.',
    sections: [
      {
        href: 'inquiries',
        label: 'Inquiry Inbox',
        description:
          'Submissions captured from the public marketing site (berth, residence, contact).',
        icon: Inbox,
      },
      {
        href: 'sends',
        label: 'Send Log',
        description: 'Brochure and per-berth PDF sends, with delivery failures surfaced for retry.',
        icon: Mail,
      },
      {
        href: 'duplicates',
        label: 'Duplicates',
        description: 'Review queue of suspected duplicate clients flagged by the dedup engine.',
        icon: UsersRound,
      },
      {
        href: 'import',
        label: 'Bulk Import',
        description: 'CSV-driven imports for clients, yachts, and reservations.',
        icon: Upload,
      },
      {
        href: 'audit',
        label: 'Audit Log',
        description: 'Searchable log of every authenticated mutation in the system.',
        icon: ScrollText,
      },
    ],
  },
  {
    title: 'Operations',
    description: 'Health checks and disaster recovery.',
    sections: [
      {
        href: 'reports',
        label: 'Reports',
        description: 'Saved analytics views and ad-hoc query results.',
        icon: LayoutDashboard,
      },
      {
        href: 'monitoring',
        label: 'Queue Monitoring',
        description: 'BullMQ queue health, throughput, and retry diagnostics.',
        icon: Database,
      },
      {
        href: 'backup',
        label: 'Backup & Restore',
        description: 'Backup posture + retention policy (read-only).',
        icon: HardDrive,
      },
      {
        href: 'storage',
        label: 'Storage Backend',
        description:
          'Choose between S3-compatible object store or local filesystem; migrate between them.',
        icon: HardDrive,
      },
    ],
  },
  {
    title: 'Tenancy',
    description: 'Multi-port and multi-install scaffolding.',
    sections: [
      {
        href: 'ports',
        label: 'Ports',
        description: 'Manage the marinas/ports this installation serves.',
        icon: Briefcase,
      },
      {
        href: 'onboarding',
        label: 'Onboarding checklist',
        description: 'Setup checklist for fresh ports (read-only references).',
        icon: LayoutDashboard,
      },
    ],
  },
  {
    title: 'Integrations',
    description: 'Third-party providers wired into the app.',
    sections: [
      {
        href: 'ai',
        label: 'AI configuration',
        description:
          'Master switch + provider credentials shared by every AI surface (OCR, berth-PDF parser, future recommender embeddings).',
        icon: ScrollText,
      },
      {
        href: 'ocr',
        label: 'Receipt OCR (per-feature)',
        description: 'Provider, model, and confidence thresholds for the receipt scanner.',
        icon: ScrollText,
      },
      {
        href: 'website-analytics',
        label: 'Website analytics (Umami)',
        description: 'Per-port Umami URL, API token, and Website ID.',
        icon: Globe,
      },
      {
        href: 'residential-stages',
        label: 'Residential pipeline stages',
        description:
          'Configure stages residential interests flow through. Removing a stage with active interests prompts for reassignment.',
        icon: ScrollText,
      },
    ],
  },
];

export default async function AdminLandingPage({
  params,
}: {
  params: Promise<{ portSlug: string }>;
}) {
  const { portSlug } = await params;
  return (
    <div className="space-y-8">
      <PageHeader
        title="Administration"
        description="Per-port configuration and system administration. Each card below opens a dedicated settings page."
      />
      {GROUPS.map((group) => (
        <section key={group.title} className="space-y-3">
          <div>
            <h2 className="text-xs font-semibold uppercase tracking-wider text-muted-foreground">
              {group.title}
            </h2>
            <p className="text-xs text-muted-foreground/80">{group.description}</p>
          </div>
          <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4">
            {group.sections.map((s) => {
              const Icon = s.icon;
              return (
                <Link
                  key={s.href}
                  // eslint-disable-next-line @typescript-eslint/no-explicit-any
                  href={`/${portSlug}/admin/${s.href}` as any}
                  className="block group"
                >
                  <Card className="h-full transition-colors group-hover:border-primary/50 group-hover:bg-muted/30">
                    <CardHeader className="flex flex-row items-start gap-3 space-y-0 pb-2">
                      <Icon className="h-5 w-5 mt-0.5 text-muted-foreground group-hover:text-primary" />
                      <div className="flex-1">
                        <CardTitle className="text-base">{s.label}</CardTitle>
                      </div>
                    </CardHeader>
                    <CardContent>
                      <CardDescription>{s.description}</CardDescription>
                    </CardContent>
                  </Card>
                </Link>
              );
            })}
          </div>
        </section>
      ))}
    </div>
  );
}