"use client";

import { useState, useEffect } from "react";
import Image from "next/image";
import { fetchLeaderboard, formatPoints, type LeaderboardData } from "@/lib/api/points";
import { useApp } from "@/contexts/AppContext";

export default function TopPerformers() {
  const { t } = useApp();
  const [leaderboard, setLeaderboard] = useState<LeaderboardData | null>(null);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    async function loadLeaderboard() {
      setLoading(true);
      const data = await fetchLeaderboard(5);
      setLeaderboard(data);
      setLoading(false);
    }
    loadLeaderboard();
  }, []);

  const getRowStyle = (rank: number) => {
    switch (rank) {
      case 1:
        return {
          bg: "#fff5ef",
          borderColor: "#ff6900",
          rankColor: "#ff6900",
          textColor: "#111827",
          pointsSize: "text-body-large",
        };
      case 2:
        return {
          bg: "#fffbf5",
          borderColor: "#ffb933",
          rankColor: "#ffb933",
          textColor: "#111827",
          pointsSize: "text-body-large",
        };
      case 3:
        return {
          bg: "#f3f4f6",
          borderColor: "#6b7280",
          rankColor: "#6b7280",
          textColor: "#111827",
          pointsSize: "text-body-large",
        };
      default:
        return {
          bg: "transparent",
          borderColor: "transparent",
          rankColor: "#d1d5db",
          textColor: "#9ca1af",
          pointsSize: "text-body-small",
        };
    }
  };

  if (loading) {
    return (
      <div className="bg-bg-surface dark:bg-gray-800 rounded-3xl border border-border-gray dark:border-gray-700 flex flex-col overflow-hidden h-full animate-pulse">
        <div className="p-6 border-b border-[#f1f5f9] dark:border-gray-700">
          <div className="h-6 bg-gray-200 dark:bg-gray-700 rounded w-32" />
        </div>
        <div className="flex-1 flex flex-col">
          {[1, 2, 3, 4, 5].map((i) => (
            <div key={i} className="h-[72px] border-l-4 border-transparent px-6 flex items-center">
              <div className="h-4 bg-gray-200 dark:bg-gray-700 rounded w-full" />
            </div>
          ))}
        </div>
      </div>
    );
  }

  if (!leaderboard) {
    return (
      <div className="bg-bg-surface dark:bg-gray-800 rounded-3xl border border-border-gray dark:border-gray-700 p-8">
        <p className="text-text-tertiary dark:text-gray-400">{t("points.failedToLoadLeaderboard")}</p>
      </div>
    );
  }

  return (
    <div className="bg-bg-surface dark:bg-gray-800 rounded-3xl border border-border-gray dark:border-gray-700 flex flex-col overflow-hidden h-full animate-fade-in">
      {/* Header */}
      <div className="border-b border-[#f1f5f9] dark:border-gray-700 px-6 pt-8 pb-8">
        <h3 className="text-heading-h4 font-bold text-text-primary dark:text-white leading-[140%]">
          {t("points.topPerformers")}
        </h3>
      </div>

      {/* Performers List */}
      <div className="flex-1 flex flex-col">
        {leaderboard.topUsers.map((performer) => {
          const style = getRowStyle(performer.rank);
          const isTopThree = performer.rank <= 3;
          const height = performer.rank <= 3 ? "h-[72px]" : "h-[68px]";

          return (
            <div
              key={performer.rank}
              className={`flex items-center justify-between px-6 ${height} border-l-4`}
              style={{
                backgroundColor: style.bg,
                borderLeftColor: style.borderColor,
              }}
            >
              {/* Left - Rank and Address */}
              <div className="flex items-center gap-5">
                {/* Rank Number */}
                <span
                  className={`font-black italic leading-[133%] ${
                    isTopThree ? "text-2xl tracking-[0.07px]" : "text-lg tracking-[-0.44px]"
                  }`}
                  style={{ color: style.rankColor }}
                >
                  {performer.rank}
                </span>

                {/* Address */}
                <span
                  className="text-body-small font-bold font-inter leading-[150%]"
                  style={{ color: style.textColor }}
                >
                  {performer.address}
                </span>
              </div>

              {/* Right - Points */}
              <span
                className={`${style.pointsSize} font-bold leading-[150%]`}
                style={{
                  color: isTopThree ? "#111827" : "#4b5563",
                }}
              >
                {formatPoints(performer.points)}
              </span>
            </div>
          );
        })}
      </div>

      {/* Footer - My Rank */}
      <div className="border-t border-border-gray dark:border-gray-700 px-6 py-6 flex items-center justify-between">
        <div className="flex items-center gap-1">
          <Image src="/icons/ui/icon-chart.svg" alt="Chart" width={16} height={16} />
          <span className="text-[10px] font-medium text-text-tertiary dark:text-gray-400 leading-[150%] tracking-[0.01em]">
            {t("points.myRank")}
          </span>
        </div>
        <span className="text-body-small font-bold text-text-primary dark:text-white leading-[150%]">
          {leaderboard.myPoints.toLocaleString()}
        </span>
      </div>
    </div>
  );
}