import { useState } from 'react';
import { useNavigate } from 'react-router-dom';
import { Terminal } from 'lucide-react';
import { api } from '../lib/api.js';

export default function Login() {
  const navigate = useNavigate();
  const [username, setUsername] = useState('');
  const [password, setPassword] = useState('');
  const [error, setError] = useState('');
  const [busy, setBusy] = useState(false);

  async function handleSubmit(e) {
    e.preventDefault();
    setBusy(true);
    setError('');
    try {
      await api.login(username, password);
      navigate('/admin/dashboard');
    } catch (err) {
      setError(err.message === 'invalid credentials' ? 'Неверный логин или пароль' : 'Не удалось войти, попробуйте ещё раз');
    } finally {
      setBusy(false);
    }
  }

  return (
    <div className="min-h-screen flex items-center justify-center px-5 bg-slate-50 dark:bg-slate-950">
      <form onSubmit={handleSubmit} className="w-full max-w-sm rounded-lg border p-6 bg-white border-slate-200 dark:bg-slate-900 dark:border-slate-800">
        <div className="flex items-center gap-2 mb-1">
          <Terminal className="h-5 w-5 text-emerald-500" />
          <h1 className="font-bold font-display text-base">Админ-панель</h1>
        </div>
        <p className="text-xs mb-5 text-slate-400 dark:text-slate-500">Доступ только для сотрудников TopSysOps.</p>

        <label className="text-xs block mb-1">Логин</label>
        <input
          value={username}
          onChange={(e) => setUsername(e.target.value)}
          autoComplete="username"
          className="w-full rounded-md border px-3 py-2 text-sm bg-transparent mb-3 border-slate-300 dark:border-slate-700"
        />

        <label className="text-xs block mb-1">Пароль</label>
        <input
          type="password"
          value={password}
          onChange={(e) => setPassword(e.target.value)}
          autoComplete="current-password"
          className="w-full rounded-md border px-3 py-2 text-sm bg-transparent mb-4 border-slate-300 dark:border-slate-700"
        />

        {error && <p className="text-xs text-rose-500 mb-4">{error}</p>}

        <button
          type="submit"
          disabled={busy}
          className="w-full py-2.5 rounded-md bg-emerald-500 text-white text-sm font-medium hover:bg-emerald-600 transition-colors disabled:opacity-60"
        >
          {busy ? 'Входим...' : 'Войти'}
        </button>
      </form>
    </div>
  );
}