"use client";

import { useEffect, useState } from "react";

interface LeaderboardEntry {
  rank: number;
  username: string;
  score: number;
  level: number;
  avatar?: string | 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);

  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 overflow-hidden 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">
            {leaderboard.map((entry) => (
              <div
                key={entry.rank}
                className={`grid grid-cols-12 gap-4 p-4 hover:bg-gray-900/50 transition ${
                  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">
                  <span className="font-bold text-pixel-gold">
                    {entry.username}
                  </span>
                </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>
    </section>
  );
}