"use client";

import { useEffect, useState } from "react";
import { Avatar } from "@/components/ui";
import { getCharacterClassIcon, getCharacterClassName, type CharacterClass } from "@/lib/character-classes";

interface LeaderboardEntry {
  rank: number;
  username: string;
  email: string;
  score: number;
  level: number;
  avatar?: string | null;
  bio?: string | null;
  characterClass?: CharacterClass | null;
}

// Format number with consistent locale to avoid hydration mismatch
const formatScore = (score: number): string => {
  return score.toLocaleString("en-US");
};

export default function Leaderboard() {
  const [leaderboard, setLeaderboard] = useState<LeaderboardEntry[]>([]);
  const [loading, setLoading] = useState(true);
  const [selectedEntry, setSelectedEntry] = useState<LeaderboardEntry | null>(
    null
  );

  useEffect(() => {
    fetch("/api/leaderboard")
      .then((res) => res.json())
      .then((data) => {
        setLeaderboard(data);
        setLoading(false);
      })
      .catch((err) => {
        console.error("Error fetching leaderboard:", err);
        setLoading(false);
      });
  }, []);

  if (loading) {
    return (
      <section className="w-full bg-black py-16 px-6 border-t-2 border-pixel-dark-purple">
        <div className="max-w-4xl mx-auto text-center text-pixel-gold">
          Chargement...
        </div>
      </section>
    );
  }
  return (
    <section className="w-full bg-black py-16 px-6 border-t-2 border-pixel-dark-purple">
      <div className="max-w-4xl mx-auto">
        <h2 className="text-4xl md:text-5xl font-bold text-center mb-12 text-pixel-gold text-pixel">
          LEADERBOARD
        </h2>

        <div className="bg-black/80 border-2 border-pixel-gold/30 rounded-lg backdrop-blur-sm">
          {/* Header */}
          <div className="bg-gray-900/80 border-b-2 border-pixel-gold/30 grid grid-cols-12 gap-4 p-4 font-bold text-sm text-gray-300">
            <div className="col-span-1 text-center">Rank</div>
            <div className="col-span-5">Player</div>
            <div className="col-span-3 text-right">Score</div>
            <div className="col-span-3 text-right">Level</div>
          </div>

          {/* Entries */}
          <div className="divide-y divide-pixel-gold/10 overflow-visible">
            {leaderboard.map((entry) => (
              <div
                key={entry.rank}
                className={`grid grid-cols-12 gap-4 p-4 hover:bg-gray-900/50 transition relative ${
                  entry.rank <= 3 ? "bg-gray-950/50" : "bg-black/40"
                }`}
              >
                <div className="col-span-1 text-center">
                  <span
                    className={`inline-block w-8 h-8 rounded-full flex items-center justify-center font-bold ${
                      entry.rank === 1
                        ? "bg-pixel-gold text-black"
                        : entry.rank === 2
                          ? "bg-gray-600 text-white"
                          : entry.rank === 3
                            ? "bg-orange-800 text-white"
                            : "bg-gray-900 text-gray-400 border border-gray-800"
                    }`}
                  >
                    {entry.rank}
                  </span>
                </div>
                <div className="col-span-5 flex items-center gap-2">
                  <div
                    className="flex items-center gap-2 cursor-pointer hover:text-pixel-gold transition"
                    onClick={() => setSelectedEntry(entry)}
                  >
                    <span className="font-bold text-pixel-gold">
                      {entry.username}
                    </span>
                    {entry.characterClass && (
                      <span className="text-xs text-gray-400 uppercase tracking-wider">
                        [{getCharacterClassIcon(entry.characterClass)} {getCharacterClassName(entry.characterClass)}]
                      </span>
                    )}
                  </div>
                </div>
                <div className="col-span-3 text-right flex items-center justify-end">
                  <span className="font-mono text-gray-300">
                    {formatScore(entry.score)}
                  </span>
                </div>
                <div className="col-span-3 text-right flex items-center justify-end">
                  <span className="font-bold text-gray-400">
                    Lv.{entry.level}
                  </span>
                </div>
              </div>
            ))}
          </div>
        </div>

        {/* Additional info */}
        <div className="mt-8 text-center text-sm text-gray-500">
          <p>Compete with players worldwide and climb the ranks!</p>
        </div>
      </div>

      {/* Character Modal */}
      {selectedEntry && (
        <div
          className="fixed inset-0 z-[200] flex items-center justify-center p-4 bg-black/80 backdrop-blur-sm"
          onClick={() => setSelectedEntry(null)}
        >
          <div
            className="bg-black border-2 border-pixel-gold/70 rounded-lg max-w-2xl w-full max-h-[90vh] overflow-y-auto shadow-2xl"
            onClick={(e) => e.stopPropagation()}
          >
            <div className="p-8">
              {/* Header */}
              <div className="flex items-center justify-between mb-6">
                <h2 className="text-3xl font-bold text-pixel-gold uppercase tracking-wider">
                  {selectedEntry.username}
                </h2>
                <button
                  onClick={() => setSelectedEntry(null)}
                  className="text-gray-400 hover:text-pixel-gold text-2xl font-bold transition"
                >
                  ×
                </button>
              </div>

              {/* Avatar and Class */}
              <div className="flex items-center gap-6 mb-6">
                <Avatar
                  src={selectedEntry.avatar}
                  username={selectedEntry.username}
                  size="xl"
                  borderClassName="border-4 border-pixel-gold/50"
                />
                <div>
                  <div className="text-xs text-gray-400 uppercase tracking-widest mb-2">
                    Rank #{selectedEntry.rank}
                  </div>
                  <div className="text-sm text-gray-300 mb-2">
                    {selectedEntry.email}
                  </div>
                  {selectedEntry.characterClass && (
                    <div className="flex items-center gap-2">
                      <span className="text-2xl">
                        {getCharacterClassIcon(selectedEntry.characterClass)}
                      </span>
                      <span className="text-lg font-bold text-pixel-gold uppercase tracking-wider">
                        {getCharacterClassName(selectedEntry.characterClass)}
                      </span>
                    </div>
                  )}
                </div>
              </div>

              {/* Stats */}
              <div className="grid grid-cols-2 gap-4 mb-6">
                <div className="bg-black/60 border border-pixel-gold/30 rounded p-4">
                  <div className="text-xs text-gray-400 uppercase tracking-widest mb-1">
                    Score
                  </div>
                  <div className="text-2xl font-bold text-pixel-gold">
                    {formatScore(selectedEntry.score)}
                  </div>
                </div>
                <div className="bg-black/60 border border-pixel-gold/30 rounded p-4">
                  <div className="text-xs text-gray-400 uppercase tracking-widest mb-1">
                    Niveau
                  </div>
                  <div className="text-2xl font-bold text-pixel-gold">
                    Lv.{selectedEntry.level}
                  </div>
                </div>
              </div>

              {/* Bio */}
              {selectedEntry.bio && (
                <div className="border-t border-pixel-gold/30 pt-6">
                  <div className="text-xs text-pixel-gold uppercase tracking-widest mb-3 font-bold">
                    Bio
                  </div>
                  <p className="text-gray-200 leading-relaxed whitespace-pre-wrap break-words">
                    {selectedEntry.bio}
                  </p>
                </div>
              )}
            </div>
          </div>
        </div>
      )}
    </section>
  );
}