'use client';

import { format } from 'date-fns';

import type { DetailTab } from '@/components/shared/detail-layout';
import { NotesList } from '@/components/shared/notes-list';
import { RecommendationList } from '@/components/interests/recommendation-list';
import { InterestTimeline } from '@/components/interests/interest-timeline';

interface InterestTabsOptions {
  interestId: string;
  currentUserId?: string;
  interest: {
    eoiStatus: string | null;
    contractStatus: string | null;
    depositStatus: string | null;
    reservationStatus: string | null;
    dateFirstContact: string | null;
    dateLastContact: string | null;
    dateEoiSent: string | null;
    dateEoiSigned: string | null;
    dateContractSent: string | null;
    dateContractSigned: string | null;
    dateDepositReceived: string | null;
    reminderEnabled: boolean;
    reminderDays: number | null;
    reminderLastFired: string | null;
    notes: string | null;
  };
}

function InfoRow({ label, value }: { label: string; value?: string | null }) {
  if (!value) return null;
  return (
    <div className="flex gap-2 py-1.5 border-b last:border-0">
      <dt className="w-44 shrink-0 text-sm text-muted-foreground">{label}</dt>
      <dd className="text-sm">{value}</dd>
    </div>
  );
}

function formatDate(date: string | null) {
  if (!date) return null;
  return format(new Date(date), 'MMM d, yyyy');
}

function OverviewTab({ interest }: { interest: InterestTabsOptions['interest'] }) {
  return (
    <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
      {/* EOI & Contract Status */}
      <div className="space-y-1">
        <h3 className="text-sm font-medium mb-2">Status</h3>
        <dl>
          <InfoRow label="EOI Status" value={interest.eoiStatus} />
          <InfoRow label="Contract Status" value={interest.contractStatus} />
          <InfoRow label="Deposit Status" value={interest.depositStatus} />
          <InfoRow label="Reservation Status" value={interest.reservationStatus} />
        </dl>
      </div>

      {/* Key Dates */}
      <div className="space-y-1">
        <h3 className="text-sm font-medium mb-2">Key Dates</h3>
        <dl>
          <InfoRow label="First Contact" value={formatDate(interest.dateFirstContact)} />
          <InfoRow label="Last Contact" value={formatDate(interest.dateLastContact)} />
          <InfoRow label="EOI Sent" value={formatDate(interest.dateEoiSent)} />
          <InfoRow label="EOI Signed" value={formatDate(interest.dateEoiSigned)} />
          <InfoRow label="Contract Sent" value={formatDate(interest.dateContractSent)} />
          <InfoRow label="Contract Signed" value={formatDate(interest.dateContractSigned)} />
          <InfoRow label="Deposit Received" value={formatDate(interest.dateDepositReceived)} />
        </dl>
      </div>

      {/* Reminder */}
      {interest.reminderEnabled && (
        <div className="space-y-1">
          <h3 className="text-sm font-medium mb-2">Reminder</h3>
          <dl>
            <InfoRow
              label="Reminder Days"
              value={interest.reminderDays ? `${interest.reminderDays} days` : null}
            />
            <InfoRow
              label="Last Fired"
              value={formatDate(interest.reminderLastFired)}
            />
          </dl>
        </div>
      )}

      {/* Notes */}
      {interest.notes && (
        <div className="space-y-1 md:col-span-2">
          <h3 className="text-sm font-medium mb-2">Notes</h3>
          <p className="text-sm text-muted-foreground whitespace-pre-wrap">
            {interest.notes}
          </p>
        </div>
      )}
    </div>
  );
}

export function getInterestTabs({
  interestId,
  currentUserId,
  interest,
}: InterestTabsOptions): DetailTab[] {
  return [
    {
      id: 'overview',
      label: 'Overview',
      content: <OverviewTab interest={interest} />,
    },
    {
      id: 'notes',
      label: 'Notes',
      content: (
        <NotesList
          entityType="interests"
          entityId={interestId}
          currentUserId={currentUserId}
        />
      ),
    },
    {
      id: 'documents',
      label: 'Documents',
      content: (
        <div className="text-center py-12 text-muted-foreground">
          <p>Documents tab available after document system is built</p>
        </div>
      ),
    },
    {
      id: 'files',
      label: 'Files',
      content: (
        <div className="text-center py-12 text-muted-foreground">
          <p>Files tab available after file system is built</p>
        </div>
      ),
    },
    {
      id: 'recommendations',
      label: 'Recommendations',
      content: <RecommendationList interestId={interestId} />,
    },
    {
      id: 'activity',
      label: 'Activity',
      content: <InterestTimeline interestId={interestId} />,
    },
  ];
}