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

export default function TeamSelection() {
  const { data: session, status } = useSession();
  const [teamCode, setTeamCode] = useState("");
  const [error, setError] = useState("");
  const [isLoading, setIsLoading] = useState(true);
  const router = useRouter();

  useEffect(() => {
    // Clear any leftover team data cache from previous teams
    localStorage.removeItem("teamData");
    sessionStorage.removeItem("teamData");
    localStorage.removeItem("userLeftTeam");

    if (status === "authenticated") {
      // Always verify team status with a fresh API call to avoid stale session data
      fetch(`/api/user?_t=${Date.now()}`, {
        headers: {
          "Cache-Control": "no-cache, no-store, must-revalidate",
          Pragma: "no-cache",
        },
        credentials: "include",
      })
        .then((res) => res.json())
        .then((userData) => {
          console.log("User data:", userData); // Debug user data

          // Check if user is an admin first
          if (userData.role === "admin") {
            // Redirect admin to admin dashboard with correct path
            router.push("/admin"); // Changed from /admin-dashboard to /admin
          } else if (userData.teamId) {
            // Only attempt to construct URL if teamId is valid
            if (userData.teamId && !isNaN(parseInt(userData.teamId))) {
              window.location.href = `/${userData.teamId}`;
            } else {
              console.error("Invalid teamId received:", userData.teamId);
              setIsLoading(false);
            }
          } else {
            setIsLoading(false);
          }
        })
        .catch((error) => {
          console.error("Failed to fetch user data:", error);
          setIsLoading(false);
        });
    } else if (status === "unauthenticated") {
      router.push("/login");
    } else {
      // Still loading session
      setIsLoading(true);
    }
  }, [status, session, router]);

  const handleJoinTeam = async (e) => {
    e.preventDefault();
    setIsLoading(true);
    setError("");

    try {
      const response = await fetch("/api/join-team", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ teamCode }),
      });

      const data = await response.json();

      if (!response.ok) {
        throw new Error(data.error || "Failed to join team");
      }

      // Add validation before constructing the URL
      if (!data.teamId || isNaN(parseInt(data.teamId))) {
        throw new Error("Invalid team ID received");
      }

      // Navigate to the team page using the correct URL format
      window.location.href = `/${data.teamId}`;
    } catch (err) {
      setError(err.message);
      setIsLoading(false);
    }
  };

  if (isLoading) {
    return <div className="loading">Loading...</div>;
  }

  return (
    <div className="auth-page">
      <div className="page-header">
        <div className="back-button"></div>
        <div className="page-title">Team Selection</div>
        <div className="placeholder"></div>
      </div>

      <div className="auth-container">
        <div className="auth-card">
          <h1>Join a Team</h1>
          <form onSubmit={handleJoinTeam}>
            <div className="form-group">
              <input
                type="text"
                placeholder="Team Code"
                value={teamCode}
                onChange={(e) => setTeamCode(e.target.value)}
                required
                className="auth-input"
              />
            </div>
            <button type="submit" className="auth-button" disabled={isLoading}>
              {isLoading ? "Joining..." : "Join Team"}
            </button>
          </form>
          {error && <p className="error-message">{error}</p>}
          <div className="team-options">
            <Link href="/create-team">
              <button className="auth-button">Create a new team</button>
            </Link>
          </div>
        </div>
      </div>

      {/* Navbar removed from here */}

      <style jsx>{`
        .auth-page {
          display: flex;
          flex-direction: column;
          justify-content: center;
          align-items: center;
          height: 100vh;
          overflow: hidden;
        }
        .auth-container {
          display: flex;
          flex-direction: column;
          justify-content: center;
          align-items: center;
          width: 100%;
          max-width: 400px;
          padding: 20px;
          box-sizing: border-box;
        }
        .auth-card {
          width: 100%;
          padding: 20px;
          box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
          border-radius: 8px;
          background-color: #fff;
        }
        .form-group {
          margin-bottom: 10px;
        }
        .auth-input {
          width: 100%;
          padding: 10px;
          border: 1px solid #ccc;
          border-radius: 4px;
        }
        .auth-button {
          width: 100%;
          padding: 10px;
          margin-top: 10px;
          background-color: #68543c; /* Updated brown color */
          color: white;
          border: none;
          border-radius: 4px;
          cursor: pointer;
          text-align: center;
        }
        .error-message {
          color: red;
          margin-top: 10px;
        }
        /* Navbar styles removed from here */
      `}</style>
    </div>
  );
}