import { Link } from "react-router";
import { ArrowLeft, Calendar } from "lucide-react";
import type { Route } from "./+types/$leagueId.sports-seasons.$sportsSeasonId.events.$eventId";
import { loader } from "./$leagueId.sports-seasons.$sportsSeasonId.events.$eventId.server";
import { formatEventDate } from "~/lib/date-utils";
import { Badge } from "~/components/ui/badge";
import {
  Card,
  CardContent,
  CardHeader,
  CardTitle,
} from "~/components/ui/card";
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "~/components/ui/table";
import { PlayoffBracket } from "~/components/scoring/PlayoffBracket";
import { GroupStageStandings } from "~/components/sport-season/GroupStageStandings";
import { Cs2MajorEventView } from "~/components/events/Cs2MajorEventView";

export function meta({ data }: Route.MetaArgs) {
  const eventName = data?.scoringEvent?.name ?? "Event";
  const leagueName = data?.league?.name ?? "League";
  return [{ title: `${eventName} — ${leagueName} — Brackt` }];
}

export { loader };

type QpResult = {
  id: string;
  placement: number;
  qualifyingPointsAwarded: string | null;
  rawScore: string | null;
  seasonParticipantId: string;
  participantName: string | null;
};

function QpResultsTable({
  eventResults,
  ownershipMap,
  userParticipantIds,
}: {
  eventResults: QpResult[];
  ownershipMap: Record<string, { teamName: string; ownerName: string; teamId: string }>;
  userParticipantIds: string[];
}) {
  if (eventResults.length === 0) {
    return (
      <Card>
        <CardContent className="py-8 text-center">
          <p className="text-muted-foreground text-sm">Results not yet available for this event.</p>
        </CardContent>
      </Card>
    );
  }
  return (
    <Card>
      <CardHeader>
        <CardTitle className="text-base">Results</CardTitle>
      </CardHeader>
      <CardContent className="pt-0">
        <Table>
          <TableHeader>
            <TableRow>
              <TableHead className="w-12">#</TableHead>
              <TableHead>Participant</TableHead>
              <TableHead>Manager</TableHead>
              <TableHead className="text-right">QP</TableHead>
            </TableRow>
          </TableHeader>
          <TableBody>
            {eventResults.map((r) => {
              const ownership = ownershipMap[r.seasonParticipantId];
              const isUser = userParticipantIds.includes(r.seasonParticipantId);
              return (
                <TableRow key={r.id} className={isUser ? "bg-electric/5" : undefined}>
                  <TableCell className="text-muted-foreground">{r.placement}</TableCell>
                  <TableCell className="font-medium">
                    {r.participantName ?? "—"}
                    {isUser && <span className="ml-1.5 text-xs text-electric">★</span>}
                  </TableCell>
                  <TableCell className="text-muted-foreground text-sm">
                    {ownership?.teamName ?? "—"}
                  </TableCell>
                  <TableCell className="text-right">
                    {r.qualifyingPointsAwarded !== null
                      ? parseFloat(r.qualifyingPointsAwarded).toFixed(2)
                      : r.rawScore !== null
                      ? r.rawScore
                      : "—"}
                  </TableCell>
                </TableRow>
              );
            })}
          </TableBody>
        </Table>
      </CardContent>
    </Card>
  );
}

export default function EventDetailPage({ loaderData }: Route.ComponentProps) {
  const { league, sportsSeason, scoringEvent } = loaderData;
  const leagueId = league.id;
  const sportsSeasonId = sportsSeason.id;

  const ownershipMap = Object.fromEntries(
    loaderData.teamOwnerships.map((o) => [
      o.participantId,
      { teamName: o.teamName, ownerName: o.ownerName ?? "", teamId: o.teamId },
    ])
  );

  const eventDate =
    formatEventDate(scoringEvent.eventStartsAt as string | null) ??
    formatEventDate(scoringEvent.eventDate) ??
    "Date TBD";

  return (
    <div className="container mx-auto py-8 px-4 max-w-5xl">
      {/* Breadcrumb */}
      <div className="mb-6 space-y-1">
        <Link
          to={`/leagues/${leagueId}/sports-seasons/${sportsSeasonId}`}
          className="flex items-center gap-1 text-sm text-muted-foreground hover:text-foreground transition-colors"
        >
          <ArrowLeft className="h-3.5 w-3.5" />
          {sportsSeason.name}
        </Link>
        <h1 className="text-2xl font-bold">{scoringEvent.name}</h1>
        <div className="flex items-center gap-2 text-sm text-muted-foreground">
          <Calendar className="h-3.5 w-3.5" />
          <span suppressHydrationWarning>{eventDate}</span>
          {scoringEvent.isComplete && (
            <Badge variant="outline" className="border-emerald-500/30 text-emerald-400 text-xs">
              Complete
            </Badge>
          )}
        </div>
      </div>

      {/* CS2 Major view */}
      {loaderData.kind === "cs2" && (
        <Cs2MajorEventView
          cs2StageResults={loaderData.cs2StageResults}
          seasonMatches={loaderData.seasonMatches}
          playoffMatches={loaderData.playoffMatches}
          playoffRounds={loaderData.playoffRounds}
          bracketTemplateId={loaderData.bracketTemplateId}
          teamOwnerships={loaderData.teamOwnerships}
          userParticipantIds={loaderData.userParticipantIds}
        />
      )}

      {/* Bracket event (tennis/golf/soccer) */}
      {loaderData.kind === "bracket" && (
        <div className="space-y-6">
          {loaderData.groupStandings.length > 0 && (
            <GroupStageStandings
              groups={loaderData.groupStandings}
              ownershipMap={ownershipMap}
              showEmpty={false}
            />
          )}
          {loaderData.playoffMatches.length > 0 ? (
            <PlayoffBracket
              matches={loaderData.playoffMatches}
              rounds={loaderData.playoffRounds}
              bracketTemplateId={loaderData.bracketTemplateId}
              preEliminatedParticipants={loaderData.preEliminatedParticipants}
              teamOwnerships={loaderData.teamOwnerships}
              userParticipantIds={loaderData.userParticipantIds}
              showOwnership={true}
              mode="bracket"
            />
          ) : (
            <Card>
              <CardContent className="py-8 text-center">
                <p className="text-muted-foreground text-sm">Bracket not yet available.</p>
              </CardContent>
            </Card>
          )}
        </div>
      )}

      {/* Tennis Grand Slam major — draw bracket + qualifying-points results */}
      {loaderData.kind === "tennis" && (
        <div className="space-y-6">
          {loaderData.playoffMatches.length > 0 ? (
            <PlayoffBracket
              matches={loaderData.playoffMatches}
              rounds={loaderData.playoffRounds}
              bracketTemplateId={loaderData.bracketTemplateId}
              preEliminatedParticipants={loaderData.preEliminatedParticipants}
              teamOwnerships={loaderData.bracketTeamOwnerships}
              userParticipantIds={loaderData.bracketUserParticipantIds}
              showOwnership={true}
              mode="bracket"
            />
          ) : (
            <Card>
              <CardContent className="py-8 text-center">
                <p className="text-muted-foreground text-sm">Bracket not yet available.</p>
              </CardContent>
            </Card>
          )}
          <QpResultsTable
            eventResults={loaderData.eventResults}
            ownershipMap={ownershipMap}
            userParticipantIds={loaderData.userParticipantIds}
          />
        </div>
      )}

      {/* Results table (QP tournaments, racing events) */}
      {loaderData.kind === "results" && (
        <QpResultsTable
          eventResults={loaderData.eventResults}
          ownershipMap={ownershipMap}
          userParticipantIds={loaderData.userParticipantIds}
        />
      )}
    </div>
  );
}