"use client";

import { signIn } from "next-auth/react";
import { useRouter } from "next/navigation";
import { useState } from "react";
import Logo from "@/components/Logo";

export default function UserLoginPage() {
  const router = useRouter();
  const [username, setUsername] = useState("");
  const [password, setPassword] = useState("");
  const [error, setError] = useState("");
  const [loading, setLoading] = useState(false);

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault();
    setError("");
    setLoading(true);

    const result = await signIn("credentials", {
      username,
      password,
      redirect: false,
    });

    setLoading(false);

    if (result?.error) {
      setError("Invalid username or password");
      return;
    }

    router.push("/quiz");
    router.refresh();
  }

  return (
    <div className="min-h-screen flex items-center justify-center bg-gray-50">
      <div className="w-full max-w-md p-8 bg-white rounded-xl shadow-md">
        <div className="flex justify-center mb-2"><Logo height={40} /></div>
        <p className="text-gray-500 text-center mb-8">Sign in to take a quiz</p>

        <form onSubmit={handleSubmit} className="space-y-4">
          {error && (
            <div className="p-3 bg-red-50 text-red-700 rounded-lg text-sm">
              {error}
            </div>
          )}

          <div>
            <label htmlFor="username" className="block text-sm font-medium text-gray-700 mb-1">
              Username
            </label>
            <input
              id="username"
              type="text"
              value={username}
              onChange={(e) => setUsername(e.target.value)}
              className="w-full px-3 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500 outline-none"
              required
            />
          </div>

          <div>
            <label htmlFor="password" className="block text-sm font-medium text-gray-700 mb-1">
              Password
            </label>
            <input
              id="password"
              type="password"
              value={password}
              onChange={(e) => setPassword(e.target.value)}
              className="w-full px-3 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500 outline-none"
              required
            />
          </div>

          <button
            type="submit"
            disabled={loading}
            className="w-full py-2 px-4 bg-blue-600 text-white rounded-lg hover:bg-blue-700 disabled:opacity-50 font-medium"
          >
            {loading ? "Signing in..." : "Sign In"}
          </button>
        </form>
      </div>
    </div>
  );
}