'use client';

import { useState } from 'react';
import { useRouter } from 'next/navigation';
import { useAuth } from '@/components/auth/AuthProvider';
import { HeartIcon } from '@/components/ui/Icons';

export default function LoginPage() {
  const [isLogin, setIsLogin] = useState(true);
  const [username, setUsername] = useState('');
  const [password, setPassword] = useState('');
  const [error, setError] = useState('');
  const [isLoading, setIsLoading] = useState(false);
  const { login, register } = useAuth();
  const router = useRouter();

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

    try {
      if (isLogin) {
        await login(username, password);
      } else {
        await register(username, password);
        await login(username, password);
      }
      router.push('/');
    } catch (err) {
      setError((err as Error).message || 'An error occurred');
    } finally {
      setIsLoading(false);
    }
  };

  return (
    <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-indigo-500 via-purple-500 to-pink-500 p-4">
      <div className="bg-white dark:bg-gray-800 rounded-2xl shadow-2xl w-full max-w-md p-8">
        <div className="flex flex-col items-center mb-8">
          <div className="w-16 h-16 bg-gradient-to-br from-indigo-500 to-pink-500 rounded-2xl flex items-center justify-center mb-4">
            <HeartIcon className="text-white" size={32} />
          </div>
          <h1 className="text-2xl font-bold text-gray-900 dark:text-gray-100">Synculous</h1>
          <p className="text-gray-500 dark:text-gray-400 mt-1">
            {isLogin ? 'Welcome back!' : 'Create your account'}
          </p>
        </div>

        <form onSubmit={handleSubmit} className="space-y-4">
          {error && (
            <div className="bg-red-50 dark:bg-red-900/30 text-red-600 dark:text-red-400 px-4 py-3 rounded-lg text-sm">
              {error}
            </div>
          )}

          <div>
            <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
              Username
            </label>
            <input
              type="text"
              value={username}
              onChange={(e) => setUsername(e.target.value)}
              className="w-full px-4 py-3 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-gray-100 placeholder-gray-400 dark:placeholder-gray-500 focus:ring-2 focus:ring-indigo-500 focus:border-indigo-500 outline-none transition"
              placeholder="Enter your username"
              required
            />
          </div>

          <div>
            <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
              Password
            </label>
            <input
              type="password"
              value={password}
              onChange={(e) => setPassword(e.target.value)}
              className="w-full px-4 py-3 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-gray-100 placeholder-gray-400 dark:placeholder-gray-500 focus:ring-2 focus:ring-indigo-500 focus:border-indigo-500 outline-none transition"
              placeholder="Enter your password"
              required
            />
          </div>

          <button
            type="submit"
            disabled={isLoading}
            className="w-full bg-gradient-to-r from-indigo-500 to-pink-500 text-white font-semibold py-3 px-4 rounded-lg hover:opacity-90 transition disabled:opacity-50 disabled:cursor-not-allowed"
          >
            {isLoading ? 'Loading...' : isLogin ? 'Sign In' : 'Create Account'}
          </button>
        </form>

        <div className="mt-6 text-center">
          <button
            onClick={() => setIsLogin(!isLogin)}
            className="text-indigo-600 hover:text-indigo-800 text-sm font-medium"
          >
            {isLogin
              ? "Don't have an account? Sign up"
              : 'Already have an account? Sign in'}
          </button>
        </div>
      </div>
    </div>
  );
}
