"use client";
import { useState, useEffect } from "react";
import { useSearchParams } from "next/navigation";
import { useRouter } from "next/navigation";
import { useSession } from "next-auth/react";
import Link from "next/link";
import NavBar from "@/components/NavBar";

export default function LeaderboardPage() {
  const [teams, setTeams] = useState([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState("");
  const searchParams = useSearchParams();
  const huntJustEnded = searchParams.get("huntEnded") === "true";
  const router = useRouter();
  const { data: session, status } = useSession(); // Fix: Properly destructure session from useSession()

  // Function to fetch leaderboard data
  const fetchLeaderboard = async () => {
    try {
      setLoading(true);

      // Fetch from the public leaderboard endpoint
      const response = await fetch("/api/leaderboard", {
        headers: {
          "Cache-Control": "no-cache, no-store, must-revalidate",
          Pragma: "no-cache",
        },
        credentials: "include",
      });

      if (!response.ok) {
        throw new Error("Failed to fetch leaderboard data");
      }

      const data = await response.json();
      setTeams(data);
      setError("");
    } catch (err) {
      console.error("Error fetching leaderboard:", err);
      setError(err.message);
    } finally {
      setLoading(false);
    }
  };

  // Fetch data on mount and set up refresh interval
  useEffect(() => {
    // Only proceed if authenticated
    if (status === "authenticated") {
      fetchLeaderboard();

      // Refresh data every 30 seconds
      const interval = setInterval(fetchLeaderboard, 30000);
      return () => clearInterval(interval);
    } else if (status === "unauthenticated") {
      router.push("/login");
    }
  }, [status, router]);

  if (loading) {
    return (
      <div className="leaderboard-page loading">
        <div className="loading-spinner"></div>
        <p>Loading leaderboard...</p>
      </div>
    );
  }

  return (
    <div className="leaderboard-page">
      <div className="page-header">
        <div className="back-button"></div>
        <div className="page-title">
          {huntJustEnded ? "Final Results" : "Leaderboard"}
        </div>
      </div>

      {huntJustEnded && (
        <div className="hunt-ended-alert">
          <div className="hunt-ended-icon">🎯</div>
          <h2>The Hunt Has Ended!</h2>
          <p>
            The timer has been stopped by an administrator. Here are the final
            results.
          </p>
        </div>
      )}

      {error ? (
        <div className="error-message">{error}</div>
      ) : teams.length > 0 ? (
        <div
          className={`leaderboard-container ${
            huntJustEnded ? "final-results" : ""
          }`}
        >
          <table className="leaderboard-table">
            <thead>
              <tr>
                <th>Rank</th>
                <th>Team</th>
                {!huntJustEnded && (
                  <>
                    <th>Progress</th>
                    <th>Last Activity</th>
                  </>
                )}
              </tr>
            </thead>
            <tbody>
              {teams.map((team, index) => (
                <tr
                  key={team.id}
                  className={index < 3 ? `rank-${index + 1}` : ""}
                >
                  <td className="rank-cell">
                    {index < 3 ? (
                      <div className="medal">
                        {index === 0 && "🥇"}
                        {index === 1 && "🥈"}
                        {index === 2 && "🥉"}
                      </div>
                    ) : (
                      `${index + 1}`
                    )}
                  </td>
                  <td className="team-name-cell">{team.name}</td>
                  {!huntJustEnded && (
                    <>
                      <td className="progress-cell">
                        <div className="progress-container">
                          <div
                            className="progress-bar"
                            style={{ width: `${team.progress}%` }}
                          ></div>
                          <span className="progress-text">
                            {team.cluesFound} / {team.totalClues}
                            {team.progress > 0 && ` (${team.progress}%)`}
                          </span>
                        </div>
                      </td>
                      <td className="activity-cell">
                        {team.lastActivity
                          ? new Date(team.lastActivity).toLocaleTimeString([], {
                              hour: "2-digit",
                              minute: "2-digit",
                            })
                          : "Never"}
                      </td>
                    </>
                  )}
                </tr>
              ))}
            </tbody>
          </table>
        </div>
      ) : (
        <div className="no-data">No teams on the leaderboard yet</div>
      )}

      {/* Only show navigation bar when the hunt hasn't ended */}
      {!huntJustEnded && (
        <NavBar
          activeLink="leaderboard"
          teamData={{ id: session?.user?.teamId }}
        />
      )}

      {/* Add a "back to home" button when the hunt has ended */}
      {huntJustEnded && (
        <div className="hunt-ended-actions">
          <button
            onClick={() => (window.location.href = "/team-selection")}
            className="back-to-home-button"
          >
            Back to Home
          </button>
        </div>
      )}

      <style jsx>{`
        .leaderboard-page {
          display: flex;
          flex-direction: column;
          min-height: 100vh;
          background-color: #f4f4f4;
          padding-bottom: ${huntJustEnded ? "0" : "70px"};
        }

        .page-header {
          background-image: url("/images/Bottom-Bar.svg");
          background-repeat: no-repeat;
          background-size: cover;
          background-position: center;
          color: white;
          padding: 15px 20px;
          display: flex;
          justify-content: center;
          align-items: center;
          position: relative;
        }

        .page-title {
          font-size: 1.2rem;
          font-weight: bold;
        }

        .back-button,
        .placeholder {
          width: 30px;
        }

        .leaderboard-container {
          padding: 20px;
          width: 100%;
          max-width: 800px;
          margin: 0 auto;
        }

        .final-results {
          max-width: 500px;
        }

        .leaderboard-table {
          width: 100%;
          border-collapse: collapse;
          background-color: white;
          border-radius: 8px;
          overflow: hidden;
          box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        }

        .leaderboard-table th,
        .leaderboard-table td {
          padding: 12px 15px;
          text-align: left;
          border-bottom: 1px solid #e0e0e0;
        }

        .leaderboard-table th {
          background-color: #f5f5f5;
          font-weight: bold;
          color: #333;
        }

        .rank-cell {
          width: 60px;
          text-align: center;
          font-weight: bold;
        }

        .medal {
          font-size: 1.5rem;
        }

        .rank-1 {
          background-color: rgba(255, 215, 0, 0.1);
        }

        .rank-2 {
          background-color: rgba(192, 192, 192, 0.1);
        }

        .rank-3 {
          background-color: rgba(205, 127, 50, 0.1);
        }

        .team-name-cell {
          font-weight: 500;
        }

        .progress-container {
          width: 100%;
          background-color: #f0f0f0;
          border-radius: 4px;
          height: 20px;
          position: relative;
          overflow: hidden;
        }

        .progress-bar {
          height: 100%;
          background-color: #4caf50;
          transition: width 0.3s ease;
        }

        .progress-text {
          position: absolute;
          top: 0;
          left: 0;
          right: 0;
          text-align: center;
          line-height: 20px;
          font-size: 0.8rem;
          color: #333;
          text-shadow: 0 0 2px rgba(255, 255, 255, 0.7);
        }

        .loading,
        .no-data {
          display: flex;
          flex-direction: column;
          align-items: center;
          justify-content: center;
          padding: 50px 0;
          text-align: center;
          color: #666;
        }

        .loading-spinner {
          border: 4px solid #f3f3f3;
          border-top: 4px solid #68543c;
          border-radius: 50%;
          width: 40px;
          height: 40px;
          animation: spin 1s linear infinite;
          margin-bottom: 20px;
        }

        @keyframes spin {
          0% {
            transform: rotate(0deg);
          }
          100% {
            transform: rotate(360deg);
          }
        }

        .error-message {
          color: red;
          padding: 20px;
          text-align: center;
        }

        .hunt-ended-alert {
          background-color: #f8d7da;
          color: #721c24;
          border: 1px solid #f5c6cb;
          border-radius: 8px;
          padding: 20px;
          margin: 20px;
          text-align: center;
        }

        .hunt-ended-icon {
          font-size: 46px;
          margin-bottom: 15px;
        }

        .hunt-ended-actions {
          display: flex;
          justify-content: center;
          margin: 30px 0;
        }

        .back-to-home-button {
          background-color: #68543c;
          color: white;
          border: none;
          border-radius: 8px;
          padding: 12px 24px;
          font-size: 16px;
          cursor: pointer;
          transition: background-color 0.3s;
        }

        .back-to-home-button:hover {
          background-color: #53402d;
        }

        /* Navigation Bar Styles */
        .nav-bar {
          display: flex;
          justify-content: space-around;
          background-color: white;
          border-top: 1px solid #ddd;
          padding: 10px 0;
          position: fixed;
          bottom: 0;
          left: 0;
          width: 100%;
          z-index: 10;
        }

        .nav-item {
          display: flex;
          flex-direction: column;
          align-items: center;
          text-decoration: none;
          color: #666;
          flex: 1;
        }

        .nav-icon {
          font-size: 24px;
          margin-bottom: 4px;
        }

        .nav-label {
          font-size: 12px;
        }

        .nav-item.active {
          color: #68543c;
        }
      `}</style>
    </div>
  );
}