"use client";

import { useEffect, useState } from "react";
import { useBackgroundImage } from "@/hooks/usePreferences";

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 LeaderboardSection() {
  const [leaderboard, setLeaderboard] = useState<LeaderboardEntry[]>([]);
  const [loading, setLoading] = useState(true);
  const backgroundImage = useBackgroundImage(
    "leaderboard",
    "/leaderboard-bg.jpg"
  );

  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="relative w-full min-h-screen flex flex-col items-center justify-center overflow-hidden pt-24 pb-16">
        <div className="text-pixel-gold text-xl">Chargement...</div>
      </section>
    );
  }
  return (
    <section className="relative w-full min-h-screen flex flex-col items-center justify-center overflow-hidden pt-24 pb-16">
      {/* Background Image */}
      <div
        className="absolute inset-0 bg-cover bg-center bg-no-repeat"
        style={{
          backgroundImage: `url('${backgroundImage}')`,
        }}
      >
        {/* Dark overlay for readability */}
        <div className="absolute inset-0 bg-gradient-to-b from-black/70 via-black/60 to-black/80"></div>
      </div>

      {/* Content */}
      <div className="relative z-10 w-full max-w-6xl mx-auto px-8 py-16">
        {/* Title Section */}
        <div className="text-center mb-12">
          <h1 className="text-5xl md:text-7xl font-gaming font-black mb-4 tracking-tight">
            <span
              className="bg-gradient-to-r from-pixel-gold via-orange-400 to-pixel-gold bg-clip-text text-transparent"
              style={{
                textShadow: "0 0 30px rgba(218, 165, 32, 0.5)",
              }}
            >
              LEADERBOARD
            </span>
          </h1>
          <div className="text-pixel-gold text-lg md:text-xl font-gaming-subtitle font-semibold flex items-center justify-center gap-2 tracking-wide">
            <span>✦</span>
            <span>Top Players</span>
            <span>✦</span>
          </div>
        </div>

        {/* Leaderboard Table */}
        <div className="bg-black/60 border border-pixel-gold/30 rounded-lg overflow-hidden backdrop-blur-sm">
          {/* Header */}
          <div className="bg-gray-900/80 border-b border-pixel-gold/30 grid grid-cols-12 gap-4 p-4 font-bold text-xs uppercase tracking-widest text-gray-300">
            <div className="col-span-1 text-center">Rank</div>
            <div className="col-span-6">Player</div>
            <div className="col-span-3 text-right">Score</div>
            <div className="col-span-2 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-gradient-to-r from-pixel-gold/10 via-pixel-gold/5 to-transparent"
                    : "bg-black/40"
                }`}
              >
                {/* Rank */}
                <div className="col-span-1 flex items-center justify-center">
                  <span
                    className={`inline-flex items-center justify-center w-10 h-10 rounded-full font-bold text-sm ${
                      entry.rank === 1
                        ? "bg-gradient-to-br from-pixel-gold to-orange-500 text-black shadow-lg shadow-pixel-gold/50"
                        : entry.rank === 2
                        ? "bg-gradient-to-br from-gray-400 to-gray-500 text-black"
                        : entry.rank === 3
                        ? "bg-gradient-to-br from-orange-700 to-orange-800 text-white"
                        : "bg-gray-900 text-gray-400 border border-gray-800"
                    }`}
                  >
                    {entry.rank}
                  </span>
                </div>

                {/* Player */}
                <div className="col-span-6 flex items-center gap-3">
                  {entry.avatar ? (
                    <div className="w-10 h-10 rounded-full border border-pixel-gold/30 overflow-hidden">
                      <img
                        src={entry.avatar}
                        alt={entry.username}
                        className="w-full h-full object-cover"
                      />
                    </div>
                  ) : (
                    <div className="w-10 h-10 rounded-full bg-gradient-to-br from-gray-800 to-gray-900 border border-pixel-gold/30 flex items-center justify-center">
                      <span className="text-pixel-gold text-xs font-bold">
                        {entry.username.charAt(0).toUpperCase()}
                      </span>
                    </div>
                  )}
                  <span
                    className={`font-bold ${
                      entry.rank <= 3 ? "text-pixel-gold" : "text-white"
                    }`}
                  >
                    {entry.username}
                  </span>
                  {entry.rank <= 3 && (
                    <span className="text-pixel-gold text-xs">✦</span>
                  )}
                </div>

                {/* Score */}
                <div className="col-span-3 flex items-center justify-end">
                  <span className="font-mono text-gray-300">
                    {formatScore(entry.score)}
                  </span>
                </div>

                {/* Level */}
                <div className="col-span-2 flex items-center justify-end">
                  <span className="font-bold text-gray-400">
                    Lv.{entry.level}
                  </span>
                </div>
              </div>
            ))}
          </div>
        </div>

        {/* Footer Info */}
        <div className="mt-8 text-center">
          <p className="text-gray-500 text-sm">
            Compete with players worldwide and climb the ranks!
          </p>
          <p className="text-gray-600 text-xs mt-2">
            Rankings update every hour
          </p>
        </div>
      </div>
    </section>
  );
}