cookie-tracker/client/src/pages/Login.jsx

import { useState } from 'react';
import { useNavigate, useLocation } from 'react-router-dom';
import { api } from '../api';

export default function Login({ onLogin }) {
  const [password, setPassword] = useState('');
  const [error, setError] = useState('');
  const [loading, setLoading] = useState(false);
  const navigate = useNavigate();
  const location = useLocation();
  const from = location.state?.from?.pathname || location.pathname || '/';

  async function handleSubmit(e) {
    e.preventDefault();
    setError('');
    setLoading(true);
    try {
      const res = await api('/auth/login', { method: 'POST', body: { password } });
      if (!res.ok) {
        setError('Invalid password');
        setLoading(false);
        return;
      }
      onLogin?.();
      navigate(from, { replace: true });
    } catch {
      setError('Something went wrong');
    }
    setLoading(false);
  }

  return (
    <div className="login-page">
      <div className="card" style={{ maxWidth: 360, margin: '2rem auto' }}>
        <h1 className="page-title" style={{ marginBottom: '1rem' }}>Log in</h1>
        <form onSubmit={handleSubmit}>
          <div className="form-group">
            <label htmlFor="login-password">Password</label>
            <input
              id="login-password"
              type="password"
              value={password}
              onChange={(e) => setPassword(e.target.value)}
              autoComplete="current-password"
              autoFocus
              disabled={loading}
            />
          </div>
          {error && <p className="error">{error}</p>}
          <button type="submit" disabled={loading}>
            {loading ? 'Logging in…' : 'Log in'}
          </button>
        </form>
      </div>
    </div>
  );
}