'use client';

import { useState } from 'react';
import Image from 'next/image';
import { GoogleLogin } from '@react-oauth/google';
import { useAuthStore } from '@/store/authStore';
import waylowLogo from '@/public/waylow-logo.png';

const googleClientId = process.env.NEXT_PUBLIC_GOOGLE_CLIENT_ID || '';

export default function LoginForm() {
  const [email, setEmail] = useState('demo@example.com');
  const [password, setPassword] = useState('demo123');
  const [error, setError] = useState('');
  const [isLoading, setIsLoading] = useState(false);
  const { login, loginWithGoogle } = useAuthStore();

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

    try {
      await login(email, password);
    } catch (err: any) {
      setError(err.response?.data?.error || 'Login failed');
    } finally {
      setIsLoading(false);
    }
  };

  const handleGoogleSuccess = async (credentialResponse: { credential?: string }) => {
    if (!credentialResponse.credential) return;
    setError('');
    setIsLoading(true);

    try {
      await loginWithGoogle(credentialResponse.credential);
    } catch (err: any) {
      setError(err.response?.data?.error || 'Google login failed');
    } finally {
      setIsLoading(false);
    }
  };

  return (
    <div className="min-h-screen flex items-center justify-center">
      <div className="bg-white p-8 rounded-2xl shadow-xl w-full max-w-sm border border-gray-100">
        <div className="flex flex-col items-center mb-6">
          <Image src={waylowLogo} alt="waylow.world" className="w-24 h-24 mb-3" width={96} height={96} />
          <p className="text-sm text-gray-500">Compare prices. Save more.</p>
        </div>

        {error && (
          <div className="bg-red-50 border border-red-200 text-red-700 px-4 py-3 rounded-lg mb-4 text-sm">
            {error}
          </div>
        )}

        <form onSubmit={handleSubmit} className="space-y-4">
          <div>
            <label htmlFor="email" className="block text-xs font-semibold text-gray-500 uppercase tracking-wide mb-1">
              Email
            </label>
            <input
              id="email"
              type="email"
              value={email}
              onChange={(e) => setEmail(e.target.value)}
              className="w-full px-4 py-2.5 border border-gray-200 rounded-lg focus:ring-2 focus:ring-brand-teal focus:border-transparent bg-gray-50 text-sm"
              required
            />
          </div>

          <div>
            <label htmlFor="password" className="block text-xs font-semibold text-gray-500 uppercase tracking-wide mb-1">
              Password
            </label>
            <input
              id="password"
              type="password"
              value={password}
              onChange={(e) => setPassword(e.target.value)}
              className="w-full px-4 py-2.5 border border-gray-200 rounded-lg focus:ring-2 focus:ring-brand-teal focus:border-transparent bg-gray-50 text-sm"
              required
            />
          </div>

          <button
            type="submit"
            disabled={isLoading}
            className="w-full bg-brand-navy hover:bg-brand-navy-light text-white font-semibold py-2.5 px-4 rounded-lg disabled:opacity-50 disabled:cursor-not-allowed"
          >
            {isLoading ? 'Signing in...' : 'Sign In'}
          </button>
        </form>

        {googleClientId && (
          <>
            <div className="flex items-center my-4">
              <div className="flex-1 border-t border-gray-200" />
              <span className="px-3 text-xs text-gray-400 uppercase">or</span>
              <div className="flex-1 border-t border-gray-200" />
            </div>

            <div className="flex justify-center">
              <GoogleLogin
                onSuccess={handleGoogleSuccess}
                onError={() => setError('Google login failed')}
                size="large"
                width="100%"
              />
            </div>
          </>
        )}

        <div className="mt-5 p-3 bg-gray-50 rounded-lg border border-gray-100">
          <p className="text-xs text-gray-400 font-medium mb-1">Demo access</p>
          <p className="text-xs text-gray-500 font-mono">demo@example.com / demo123</p>
        </div>
      </div>
    </div>
  );
}