import { useState, useCallback } from 'react';
import { useNavigate } from 'react-router-dom';
import { useAuth } from '@/hooks/useAuth';

export interface LoginState {
  username: string;
  password: string;
  loading: boolean;
  error: string;
  setUsername: (v: string) => void;
  setPassword: (v: string) => void;
  handleLogin: (e: React.FormEvent) => Promise<void>;
}

export function useLogin(): LoginState {
  const navigate = useNavigate();
  const { login } = useAuth();
  const [username, setUsername] = useState('');
  const [password, setPassword] = useState('');
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState('');

  const handleLogin = useCallback(async (e: React.FormEvent) => {
    e.preventDefault();
    if (!username || !password) return;
    setLoading(true);
    setError('');
    const ok = await login(username, password);
    setLoading(false);
    if (ok) {
      navigate('/dashboard');
    } else {
      setError('用户名或密码错误');
    }
  }, [username, password, login, navigate]);

  return { username, password, loading, error, setUsername, setPassword, handleLogin };
}