import React, { useState } from 'react';
import {
  Form,
  Input,
  Button,
  Card,
  App,
} from 'antd';
import {
  UserOutlined,
  LockOutlined,
  EyeOutlined,
  EyeInvisibleOutlined
} from '@ant-design/icons';
import { useNavigate } from 'react-router';
import {
  useAuth,
} from '../hooks/AuthProvider';


// 登录页面
export const LoginPage = () => {
  const { message } = App.useApp();
  const { login } = useAuth();
  const [form] = Form.useForm();
  const [loading, setLoading] = useState(false);
  const navigate = useNavigate();
  
  const handleSubmit = async (values: { username: string; password: string }) => {
    try {
      setLoading(true);
      
      // 获取地理位置
      let latitude: number | undefined;
      let longitude: number | undefined;
      
      try {
        if (navigator.geolocation) {
          const position = await new Promise<GeolocationPosition>((resolve, reject) => {
            navigator.geolocation.getCurrentPosition(resolve, reject);
          });
          latitude = position.coords.latitude;
          longitude = position.coords.longitude;
        }
      } catch (geoError) {
        console.warn('获取地理位置失败:', geoError);
      }
      
      await login(values.username, values.password, latitude, longitude);
      // 登录成功后跳转到管理后台首页
      navigate('/admin/dashboard');
    } catch (error: any) {
      message.error(error instanceof Error ? error.message : '登录失败');
    } finally {
      setLoading(false);
    }
  };
  
  return (
    <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-blue-50 to-indigo-100 py-12 px-4 sm:px-6 lg:px-8">
      <div className="max-w-md w-full space-y-8">
        <div className="text-center">
          <div className="w-16 h-16 bg-primary/10 rounded-full flex items-center justify-center mx-auto mb-4">
            <UserOutlined style={{ fontSize: 32, color: '#1890ff' }} />
          </div>
          <h2 className="mt-2 text-center text-3xl font-extrabold text-gray-900">
            管理后台登录
          </h2>
          <p className="mt-2 text-gray-500">请输入您的账号和密码</p>
        </div>
        
        <Card className="shadow-lg border-none transition-all duration-300 hover:shadow-xl">
          <Form
            form={form}
            name="login"
            onFinish={handleSubmit}
            autoComplete="off"
            layout="vertical"
          >
            <Form.Item
              name="username"
              rules={[{ required: true, message: '请输入用户名' }]}
              label="用户名"
            >
              <Input
                prefix={<UserOutlined className="text-primary" />}
                placeholder="请输入用户名"
                size="large"
                className="transition-all duration-200 focus:border-primary focus:ring-1 focus:ring-primary"
              />
            </Form.Item>
            
            <Form.Item
              name="password"
              rules={[{ required: true, message: '请输入密码' }]}
              label="密码"
            >
              <Input.Password
                prefix={<LockOutlined className="text-primary" />}
                placeholder="请输入密码"
                size="large"
                iconRender={(visible) => (visible ? <EyeOutlined /> : <EyeInvisibleOutlined />)}
                className="transition-all duration-200 focus:border-primary focus:ring-1 focus:ring-primary"
              />
            </Form.Item>
            
            <Form.Item>
              <Button
                type="primary"
                htmlType="submit"
                size="large"
                block
                loading={loading}
                className="h-12 text-lg transition-all duration-200 hover:shadow-lg"
              >
                登录
              </Button>
            </Form.Item>
          </Form>
          
          <div className="mt-6 text-center text-gray-500 text-sm">
            <p>测试账号: <span className="font-medium">admin</span> / <span className="font-medium">admin123</span></p>
            <p className="mt-1">© {new Date().getFullYear()} 管理系统. 保留所有权利.</p>
          </div>
        </Card>
      </div>
    </div>
  );
};