import { Form, Link } from "react-router";
import type { Route } from "./+types/admin.sports-seasons.$id.events";
import { loader, action } from "./admin.sports-seasons.$id.events.server";
import { Button } from "~/components/ui/button";
import { Input } from "~/components/ui/input";
import { Label } from "~/components/ui/label";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "~/components/ui/card";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "~/components/ui/select";
import { Badge } from "~/components/ui/badge";
import { Calendar, Trophy, ArrowLeft, Trash2 } from "lucide-react";
import { format } from "date-fns";
import { QualifyingPointsStandings } from "~/components/scoring/QualifyingPointsStandings";

export { loader, action };

export default function SportsSeasonEvents({
  loaderData,
  actionData,
}: Route.ComponentProps) {
  const { sportsSeason, events, qpStandings, scoringRules } = loaderData;

  const getEventTypeLabel = (type: string) => {
    switch (type) {
      case "playoff_game":
        return "Bracket";
      case "major_tournament":
        return "Major Tournament";
      case "final_standings":
        return "Final Standings";
      default:
        return type;
    }
  };

  const getStatusBadge = (isComplete: boolean) => {
    return isComplete ? (
      <Badge variant="default" className="bg-emerald-500">
        Completed
      </Badge>
    ) : (
      <Badge variant="secondary">In Progress</Badge>
    );
  };

  return (
    <div className="p-8">
      <div className="max-w-4xl">
        <div className="mb-6">
          <Button variant="ghost" size="sm" asChild className="mb-2">
            <Link to={`/admin/sports-seasons/${sportsSeason.id}`}>
              <ArrowLeft className="mr-2 h-4 w-4" />
              Back to Sports Season
            </Link>
          </Button>
          <h1 className="text-3xl font-bold">Scoring Events</h1>
          <p className="text-muted-foreground mt-1">
            {sportsSeason.sport.name} - {sportsSeason.name}
          </p>
          {sportsSeason.scoringPattern === "qualifying_points" && (
            <div className="mt-2">
              <Badge variant="outline" className="bg-amber-50 text-amber-700 border-amber-300 dark:bg-amber-950 dark:text-amber-300">
                Qualifying Points Mode
              </Badge>
            </div>
          )}
        </div>

        <div className="space-y-6">
          {/* Success/Error Messages */}
          {actionData?.error && (
            <div className="bg-destructive/15 text-destructive px-4 py-3 rounded-md text-sm">
              {actionData.error}
            </div>
          )}

          {actionData?.success && (
            <div className="bg-emerald-500/15 text-emerald-400 px-4 py-3 rounded-md text-sm">
              {actionData.success}
            </div>
          )}

          {/* QP Standings for qualifying points sports */}
          {sportsSeason.scoringPattern === "qualifying_points" && qpStandings && (
            <QualifyingPointsStandings
              standings={qpStandings}
              scoringRules={scoringRules}
              isFinalized={sportsSeason.qualifyingPointsFinalized || false}
              totalMajors={sportsSeason.totalMajors}
              majorsCompleted={sportsSeason.majorsCompleted}
              canFinalize={
                sportsSeason.totalMajors !== null &&
                sportsSeason.majorsCompleted >= sportsSeason.totalMajors &&
                !sportsSeason.qualifyingPointsFinalized
              }
            />
          )}

          {/* Create New Event Card */}
          <Card>
            <CardHeader>
              <CardTitle>Create New Event</CardTitle>
              <CardDescription>
                Add a new scoring event (bracket, tournament, standings, etc.)
              </CardDescription>
            </CardHeader>
            <CardContent>
              <Form method="post" className="space-y-4">
                <div className="space-y-2">
                  <Label htmlFor="name">Event Name</Label>
                  <Input
                    id="name"
                    name="name"
                    type="text"
                    placeholder="e.g., Super Bowl, Round 1, Game 3"
                    required
                  />
                </div>

                <div className="space-y-2">
                  <Label htmlFor="eventType">Event Type</Label>
                  <Select
                    name="eventType"
                    defaultValue={sportsSeason.scoringPattern === "qualifying_points" ? "major_tournament" : "playoff_game"}
                    required
                  >
                    <SelectTrigger id="eventType">
                      <SelectValue />
                    </SelectTrigger>
                    <SelectContent>
                      <SelectItem value="playoff_game">Bracket</SelectItem>
                      <SelectItem value="major_tournament">Major Tournament</SelectItem>
                      <SelectItem value="final_standings">Final Standings</SelectItem>
                    </SelectContent>
                  </Select>
                  {sportsSeason.scoringPattern === "qualifying_points" && (
                    <p className="text-sm text-muted-foreground">
                      Major Tournament events will automatically award qualifying points when completed.
                    </p>
                  )}
                </div>

                <div className="space-y-2">
                  <Label htmlFor="eventDate">Event Date (Optional)</Label>
                  <Input id="eventDate" name="eventDate" type="date" />
                </div>

                {actionData?.error && (
                  <div className="bg-destructive/15 text-destructive px-4 py-3 rounded-md text-sm">
                    {actionData.error}
                  </div>
                )}

                <Button type="submit" className="w-full">
                  <Trophy className="mr-2 h-4 w-4" />
                  Create Event
                </Button>
              </Form>
            </CardContent>
          </Card>

          {/* Events List */}
          <Card>
            <CardHeader>
              <CardTitle>Events</CardTitle>
              <CardDescription>
                {events.length} {events.length === 1 ? "event" : "events"}
              </CardDescription>
            </CardHeader>
            <CardContent>
              {events.length === 0 ? (
                <p className="text-sm text-muted-foreground">
                  No events created yet. Create your first event above.
                </p>
              ) : (
                <div className="space-y-3">
                  {events.map((event: { id: string; name: string; eventType: string; eventDate?: string | null; isComplete: boolean }) => (
                    <Card key={event.id} className="hover:border-primary/50 transition-colors">
                      <CardContent className="pt-6">
                        <div className="flex items-start justify-between gap-4">
                          <Link
                            to={`/admin/sports-seasons/${sportsSeason.id}/events/${event.id}`}
                            className="flex-1 cursor-pointer"
                          >
                            <div className="flex items-center gap-2 mb-1">
                              <h3 className="font-semibold">{event.name}</h3>
                              {getStatusBadge(event.isComplete)}
                            </div>
                            <div className="flex items-center gap-4 text-sm text-muted-foreground">
                              <span>
                                {getEventTypeLabel(event.eventType)}
                              </span>
                              {event.eventDate && (
                                <span className="flex items-center gap-1">
                                  <Calendar className="h-3 w-3" />
                                  {format(new Date(event.eventDate), "MMM d, yyyy")}
                                </span>
                              )}
                            </div>
                          </Link>
                          <Form method="post" className="flex-shrink-0">
                            <input type="hidden" name="intent" value="delete-event" />
                            <input type="hidden" name="eventId" value={event.id} />
                            <Button
                              type="submit"
                              size="sm"
                              variant="ghost"
                              className="text-destructive hover:text-destructive"
                              onClick={(e) => {
                                if (!confirm(`Delete event "${event.name}"? This will also delete all results.`)) {
                                  e.preventDefault();
                                }
                              }}
                            >
                              <Trash2 className="h-4 w-4" />
                            </Button>
                          </Form>
                        </div>
                      </CardContent>
                    </Card>
                  ))}
                </div>
              )}
            </CardContent>
          </Card>
        </div>
      </div>
    </div>
  );
}