'use client';

import { useState } from 'react';
import { useRouter } from 'next/navigation';
import Link from 'next/link';
import { signIn } from 'next-auth/react';

export default function RegisterPage() {
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');
  const [showPassword, setShowPassword] = useState(false);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState('');
  const router = useRouter();

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault();
    setLoading(true);
    setError('');
    const res = await fetch('/api/register', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ email, password }),
    });
    const data = await res.json();
    if (!res.ok) {
      setLoading(false);
      setError(data.error || 'Registration failed');
      return;
    }
    // Auto-login after registration
    const signInRes = await signIn('credentials', {
      redirect: false,
      email,
      password,
      callbackUrl: '/account/profile',
    });
    setLoading(false);
    if (signInRes?.ok) {
      router.push('/');
    } else {
      router.push('/account/login?registered=1');
    }
  }

  return (
    <div className="min-h-screen flex items-center justify-center bg-white dark:bg-neutral-900">
      <div className="w-full max-w-md bg-white dark:bg-neutral-900 rounded-lg shadow p-8">
        <h1 className="text-2xl font-bold mb-4 text-gray-900 dark:text-white">Create your account</h1>
        <form onSubmit={handleSubmit} className="space-y-4">
          <input
            type="email"
            required
            placeholder="Email address"
            className="w-full px-3 py-2 border border-gray-300 dark:border-neutral-700 rounded-md bg-white dark:bg-neutral-800 text-gray-900 dark:text-white focus:outline-none focus:ring-primary-500 focus:border-primary-500"
            value={email}
            onChange={e => setEmail(e.target.value)}
            disabled={loading}
          />
          <div className="relative">
            <input
              type={showPassword ? 'text' : 'password'}
              required
              placeholder="Password"
              className="w-full px-3 py-2 border border-gray-300 dark:border-neutral-700 rounded-md bg-white dark:bg-neutral-800 text-gray-900 dark:text-white focus:outline-none focus:ring-primary-500 focus:border-primary-500 pr-10"
              value={password}
              onChange={e => setPassword(e.target.value)}
              disabled={loading}
            />
            <button
              type="button"
              className="absolute inset-y-0 right-2 flex items-center text-xs text-gray-500 dark:text-gray-300"
              tabIndex={-1}
              onClick={() => setShowPassword(v => !v)}
            >
              {showPassword ? 'Hide' : 'Show'}
            </button>
          </div>
          {error && <div className="text-red-600 text-sm">{error}</div>}
          <button
            type="submit"
            className="w-full btn btn-primary text-white font-medium text-sm py-2 px-4 rounded-md focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary-500"
            disabled={loading}
          >
            {loading ? 'Creating account...' : 'Create Account'}
          </button>
        </form>
        <div className="mt-6 text-center">
          <Link href="/account/login" className="text-primary-600 hover:underline text-sm">Already have an account? Sign in</Link>
        </div>
      </div>
    </div>
  );
}