'use client';

import { use } from 'react';
import { trpc } from '@/lib/trpc/client';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
import { Badge } from '@/components/ui/badge';
import { DeliberationRankingForm } from '@/components/jury/deliberation-ranking-form';
import { CheckCircle2 } from 'lucide-react';
import { toast } from 'sonner';

export default function JuryDeliberationPage({ params: paramsPromise }: { params: Promise<{ sessionId: string }> }) {
  const params = use(paramsPromise);
  const utils = trpc.useUtils();

  const { data: session, isLoading } = trpc.deliberation.getSession.useQuery(
    { sessionId: params.sessionId },
    { refetchInterval: 10_000 },
  );

  const submitVoteMutation = trpc.deliberation.submitVote.useMutation({
    onSuccess: () => {
      utils.deliberation.getSession.invalidate();
      toast.success('Vote submitted successfully');
    },
    onError: (err) => {
      toast.error(err.message);
    }
  });

  const handleSubmitVote = (votes: Array<{ projectId: string; rank?: number; isWinnerPick?: boolean }>) => {
    votes.forEach((vote) => {
      submitVoteMutation.mutate({
        sessionId: params.sessionId,
        juryMemberId: '', // TODO: resolve current user's jury member ID from session participants
        projectId: vote.projectId,
        rank: vote.rank,
        isWinnerPick: vote.isWinnerPick
      });
    });
  };

  if (isLoading) {
    return (
      <div className="space-y-6">
        <Card>
          <CardContent className="flex items-center justify-center py-12">
            <p className="text-muted-foreground">Loading session...</p>
          </CardContent>
        </Card>
      </div>
    );
  }

  if (!session) {
    return (
      <div className="space-y-6">
        <Card>
          <CardContent className="flex items-center justify-center py-12">
            <p className="text-muted-foreground">Session not found</p>
          </CardContent>
        </Card>
      </div>
    );
  }

  const hasVoted = false; // TODO: check if current user has voted in this session

  if (session.status !== 'VOTING') {
    return (
      <div className="space-y-6">
        <Card>
          <CardHeader>
            <CardTitle>Deliberation Session</CardTitle>
            <CardDescription>
              {session.round?.name} - {session.category}
            </CardDescription>
          </CardHeader>
          <CardContent className="flex flex-col items-center justify-center py-12">
            <p className="text-muted-foreground">
              {session.status === 'DELIB_OPEN'
                ? 'Voting has not started yet. Please wait for the admin to open voting.'
                : session.status === 'TALLYING'
                ? 'Voting is closed. Results are being tallied.'
                : 'This session is locked.'}
            </p>
          </CardContent>
        </Card>
      </div>
    );
  }

  if (hasVoted) {
    return (
      <div className="space-y-6">
        <Card>
          <CardHeader>
            <div className="flex items-start justify-between">
              <div>
                <CardTitle>Deliberation Session</CardTitle>
                <CardDescription className="mt-1">
                  {session.round?.name} - {session.category}
                </CardDescription>
              </div>
              <Badge>{session.status}</Badge>
            </div>
          </CardHeader>
          <CardContent className="flex flex-col items-center justify-center py-12">
            <CheckCircle2 className="mb-4 h-12 w-12 text-green-600" />
            <p className="font-medium">Vote Submitted</p>
            <p className="mt-1 text-sm text-muted-foreground">
              Thank you for your participation in this deliberation
            </p>
          </CardContent>
        </Card>
      </div>
    );
  }

  return (
    <div className="space-y-6">
      <Card>
        <CardHeader>
          <div className="flex items-start justify-between">
            <div>
              <CardTitle>Deliberation Session</CardTitle>
              <CardDescription className="mt-1">
                {session.round?.name} - {session.category}
              </CardDescription>
            </div>
            <Badge>{session.status}</Badge>
          </div>
        </CardHeader>
        <CardContent>
          <p className="text-muted-foreground">
            {session.mode === 'SINGLE_WINNER_VOTE'
              ? 'Select your top choice for this category.'
              : 'Rank all projects from best to least preferred.'}
          </p>
        </CardContent>
      </Card>

      <DeliberationRankingForm
        projects={session.results?.map((r) => r.project) ?? []}
        mode={session.mode}
        onSubmit={handleSubmitVote}
        disabled={submitVoteMutation.isPending}
      />
    </div>
  );
}
