import { useState } from 'react';
import { X } from 'lucide-react';
import { useAuth } from '../contexts/AuthContext';

interface AuthModalProps {
  onClose: () => void;
}

export default function AuthModal({ onClose }: AuthModalProps) {
  const { signIn, signUp } = useAuth();
  const [isSignUp, setIsSignUp] = useState(false);
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState('');

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setError('');
    setLoading(true);

    try {
      const { error } = isSignUp
        ? await signUp(email, password)
        : await signIn(email, password);

      if (error) {
        setError(error.message);
      } else {
        onClose();
      }
    } catch (err) {
      setError('发生错误，请重试');
    } finally {
      setLoading(false);
    }
  };

  return (
    <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50 p-4">
      <div className="bg-white rounded-xl shadow-xl max-w-md w-full p-6">
        <div className="flex justify-between items-center mb-6">
          <h2 className="text-2xl font-bold text-gray-900">
            {isSignUp ? '注册账号' : '登录账号'}
          </h2>
          <button
            onClick={onClose}
            className="p-2 hover:bg-gray-100 rounded-lg transition-colors"
          >
            <X size={20} />
          </button>
        </div>

        <form onSubmit={handleSubmit} className="space-y-4">
          <div>
            <label className="block text-sm font-medium text-gray-700 mb-1">
              邮箱
            </label>
            <input
              type="email"
              value={email}
              onChange={(e) => setEmail(e.target.value)}
              className="w-full px-4 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent"
              placeholder="your@email.com"
              required
            />
          </div>

          <div>
            <label className="block text-sm font-medium text-gray-700 mb-1">
              密码
            </label>
            <input
              type="password"
              value={password}
              onChange={(e) => setPassword(e.target.value)}
              className="w-full px-4 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent"
              placeholder="••••••••"
              required
              minLength={6}
            />
          </div>

          {error && (
            <div className="p-3 bg-red-100 border border-red-400 text-red-700 rounded-lg text-sm font-medium animate-pulse">
              错误: {error}
            </div>
          )}

          <button
            type="submit"
            disabled={loading}
            className="w-full py-3 px-4 bg-blue-600 text-white rounded-lg hover:bg-blue-700 transition-colors font-medium disabled:opacity-80 disabled:cursor-wait"
          >
            {isSignUp ? '注册' : '登录'}
          </button>
        </form>

        <div className="mt-4 text-center">
          <button
            onClick={() => setIsSignUp(!isSignUp)}
            className="text-sm text-blue-600 hover:text-blue-700"
          >
            {isSignUp ? '已有账号？去登录' : '没有账号？去注册'}
          </button>
        </div>
      </div>
    </div>
  );
}