'use client';

import { useState } from 'react';
import { useSearchParams, useRouter } from 'next/navigation';
import { useTranslations } from 'next-intl';
import Link from 'next/link';

export default function ResetPasswordPage() {
  const t = useTranslations('auth.resetPassword');
  const params = useSearchParams();
  const token = params.get('token') ?? '';
  const router = useRouter();
  const [password, setPassword] = useState('');
  const [confirm, setConfirm] = useState('');
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  if (!token) {
    return (
      <main style={s.page}>
        <p style={{ color: 'var(--color-misconception)' }}>{t('invalidLink')}</p>
        <Link href="/auth/forgot-password" style={s.link}>{t('requestNew')}</Link>
      </main>
    );
  }

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    if (password !== confirm) { setError(t('passwordMismatch')); return; }
    setLoading(true);
    setError(null);
    const res = await fetch('/api/auth/reset-password', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ token, password }),
    });
    setLoading(false);
    if (res.ok) {
      router.push('/auth/login?reset=1');
    } else {
      const d = (await res.json()) as { error?: string };
      setError(d.error ?? t('error'));
    }
  };

  return (
    <main style={s.page}>
      <h1 style={s.heading}>{t('title')}</h1>
      <form onSubmit={handleSubmit} style={s.form} noValidate>
        <label style={s.label} htmlFor="password">{t('newPassword')}</label>
        <input id="password" type="password" value={password} onChange={(e) => setPassword(e.target.value)} required minLength={8} autoComplete="new-password" style={s.input} />
        <label style={s.label} htmlFor="confirm">{t('confirmPassword')}</label>
        <input id="confirm" type="password" value={confirm} onChange={(e) => setConfirm(e.target.value)} required autoComplete="new-password" style={s.input} />
        {error && <p role="alert" style={s.error}>{error}</p>}
        <button type="submit" disabled={!password || !confirm || loading} style={s.btn}>
          {loading ? t('submitting') : t('submit')}
        </button>
      </form>
    </main>
  );
}

const s = {
  page: { display: 'flex', flexDirection: 'column' as const, alignItems: 'center', minHeight: '100svh', padding: 'var(--space-8)', paddingTop: 'var(--space-16)', gap: 'var(--space-4)' },
  heading: { fontFamily: 'var(--font-display)', fontSize: '1.5rem', fontWeight: 500, color: 'var(--color-ink)', marginBottom: 'var(--space-4)' },
  form: { width: '100%', maxWidth: '26rem', display: 'flex', flexDirection: 'column' as const, gap: 'var(--space-2)' },
  label: { fontFamily: 'var(--font-display)', fontSize: '0.875rem', fontWeight: 500, color: 'var(--color-ink)', marginTop: 'var(--space-3)' },
  input: { padding: 'var(--space-3) var(--space-4)', background: 'var(--color-surface)', border: '1px solid var(--color-border)', borderRadius: '4px', fontFamily: 'var(--font-body)', fontSize: '1rem', color: 'var(--color-ink)', outline: 'none' },
  error: { color: 'var(--color-misconception)', fontSize: '0.875rem', margin: 0 },
  btn: { marginTop: 'var(--space-4)', padding: 'var(--space-3) var(--space-6)', background: 'var(--color-accent)', color: 'var(--color-on-accent)', border: 'none', borderRadius: '4px', fontFamily: 'var(--font-display)', fontSize: '0.9375rem', fontWeight: 500, cursor: 'pointer' },
  link: { color: 'var(--color-accent)', fontFamily: 'var(--font-display)', fontSize: '0.875rem', textDecoration: 'none' },
} as const;