import React, {useEffect, useState} from 'react';
import {Form, Input, Button, message, Select} from 'antd';
import {useNavigate} from 'react-router-dom';
import {useDispatch} from 'react-redux';
import {login} from './service';
import {getEnabledTenants} from '@/pages/System/Tenant/service';
import {setToken, setUserInfo, setMenus} from '../../store/userSlice';
import {getCurrentUserMenus} from '@/pages/System/Menu/service';
import type { MenuResponse } from '@/pages/System/Menu/types';
import type { TenantResponse } from '@/pages/System/Tenant/types';
import styles from './index.module.css';

interface LoginForm {
    tenantId: string;
    username: string;
    password: string;
}

const Login: React.FC = () => {
    const navigate = useNavigate();
    const dispatch = useDispatch();
    const [form] = Form.useForm<LoginForm>();
    const [loading, setLoading] = useState(false);
    const [tenants, setTenants] = useState<TenantResponse[]>([]);

    useEffect(() => {
        const fetchTenants = async () => {
            try {
                const data = await getEnabledTenants();
                setTenants(data);
            } catch (error) {
                console.error('获取租户列表失败:', error);
            }
        };

        fetchTenants();
    }, []);

    // 加载菜单数据
    const loadMenuData = async () => {
        try {
            const menuData = await getCurrentUserMenus();
            if (menuData && menuData.length > 0) {
                dispatch(setMenus(menuData));
            }
        } catch (error) {
            console.error('获取菜单数据失败:', error);
        }
    };

    const handleFinish = async (values: LoginForm) => {
        setLoading(true);
        try {
            // 1. 登录获取 token 和用户信息
            const loginData = await login(values);
            dispatch(setToken(loginData.token));
            dispatch(setUserInfo({
                id: loginData.id,
                username: loginData.username,
                nickname: loginData.nickname,
                email: loginData.email,
                phone: loginData.phone
            }));

            // 2. 获取菜单数据
            await loadMenuData();

            message.success('登录成功');
            navigate('/');
        } catch (error) {
            console.error('登录失败:', error);
        } finally {
            setLoading(false);
        }
    };

    return (
        <div className={styles.loginContainer}>
            <div className={styles.loginBox}>
                <div className={styles.logo}>
                    <h1>管理系统</h1>
                </div>
                <Form<LoginForm>
                    form={form}
                    name="login"
                    onFinish={handleFinish}
                    autoComplete="off"
                    size="large"
                >
                    <Form.Item
                        name="tenantId"
                        rules={[{required: true, message: '请选择租户!'}]}
                    >
                        <Select
                            placeholder="请选择租户"
                            options={tenants.map(tenant => ({
                                label: tenant.name,
                                value: tenant.code
                            }))}
                            className={styles.input}
                        />
                    </Form.Item>

                    <Form.Item
                        name="username"
                        rules={[{required: true, message: '请输入用户名!'}]}
                    >
                        <Input 
                            placeholder="用户名" 
                            className={styles.input}
                        />
                    </Form.Item>

                    <Form.Item
                        name="password"
                        rules={[{required: true, message: '请输入密码!'}]}
                    >
                        <Input.Password 
                            placeholder="密码" 
                            className={styles.input}
                        />
                    </Form.Item>

                    <Form.Item>
                        <Button 
                            type="primary" 
                            htmlType="submit" 
                            block 
                            loading={loading}
                            className={styles.loginButton}
                        >
                            登录
                        </Button>
                    </Form.Item>
                </Form>
            </div>
        </div>
    );
};

export default Login;