/**
 * 站点信息配置页面
 * 用于配置和管理 DICOM 站点基本信息
 */
import React, { useEffect, useState } from 'react';
import {
  Form,
  Input,
  InputNumber,
  Button,
  Typography,
  Space,
  message,
  Spin,
  Modal,
} from 'antd';
import { CopyOutlined } from '@ant-design/icons';
import { SPACING } from '../../constants';
import { RootState, useAppSelector } from '@/states/store';

const { Title } = Typography;
const { TextArea } = Input;

// 站点信息数据类型
interface SiteInfoData {
  siteName: string;
  aeTitle: string;
  port: number;
  institutionName?: string;
  siteCode?: string;
  description?: string;
}

/**
 * 站点信息组件
 *
 * 布局结构：
 * - Layout Type: Vertical Stack Layout
 * - Form Layout: Horizontal
 * - Label Width: 120px
 */
const SiteInfo: React.FC = () => {
  const [form] = Form.useForm<SiteInfoData>();
  const [loading, setLoading] = useState(false);
  const [saving, setSaving] = useState(false);
  const [initialValues, setInitialValues] = useState<SiteInfoData | null>(null);
  const sn = useAppSelector((state: RootState) => state.product.sn);
  const { Search } = Input;
  // 模拟加载数据
  useEffect(() => {
    loadSiteInfo();
  }, []);

  // 加载站点信息
  const loadSiteInfo = async () => {
    setLoading(true);
    try {
      // TODO: 替换为实际的 API 调用
      // const data = await getSiteInfo();

      // 模拟数据
      const mockData: SiteInfoData = {
        siteName: 'Medical Imaging Center',
        aeTitle: 'PACS_SERVER',
        port: 104,
        institutionName: 'General Hospital',
        siteCode: 'SITE001',
        description: 'Main PACS server for medical imaging',
      };

      setInitialValues(mockData);
      form.setFieldsValue(mockData);
    } catch (error) {
      message.error('加载站点信息失败');
      console.error('Failed to load site info:', error);
    } finally {
      setLoading(false);
    }
  };

  // 保存站点信息
  const handleSave = async () => {
    try {
      // 触发表单验证
      const values = await form.validateFields();

      setSaving(true);

      // TODO: 替换为实际的 API 调用
      // await updateSiteInfo(values);

      // 模拟保存延迟
      await new Promise((resolve) => setTimeout(resolve, 1000));

      message.success('保存成功');
      setInitialValues(values);

      // 提示用户可能需要重启服务
      Modal.info({
        title: '提示',
        content: '站点配置已保存，部分更改可能需要重启服务后生效。',
      });
    } catch (error) {
      if (error instanceof Error) {
        message.error(`保存失败: ${error.message}`);
      } else {
        message.error('表单验证失败，请检查输入');
      }
      console.error('Failed to save site info:', error);
    } finally {
      setSaving(false);
    }
  };

  // 重置表单
  const handleReset = (): void => {
    if (initialValues) {
      // 检查是否有未保存的更改
      const currentValues = form.getFieldsValue();
      const hasChanges =
        JSON.stringify(currentValues) !== JSON.stringify(initialValues);

      if (hasChanges) {
        Modal.confirm({
          title: '确认重置',
          content: '您有未保存的更改，确定要重置表单吗？',
          onOk: () => {
            form.setFieldsValue(initialValues);
            message.info('表单已重置');
          },
        });
      } else {
        form.setFieldsValue(initialValues);
        message.info('表单已重置');
      }
    }
  };

  // AE Title 输入转大写
  const handleAETitleChange = (
    e: React.ChangeEvent<HTMLInputElement>
  ): void => {
    const value = e.target.value.toUpperCase().replace(/[^A-Z0-9_]/g, '');
    form.setFieldsValue({ aeTitle: value });
  };

  // 复制SN号码
  const handleCopySN = async (): Promise<void> => {
    if (sn) {
      try {
        await navigator.clipboard.writeText(sn);
        message.success('SN码已复制到剪贴板');
      } catch (error) {
        message.error('复制失败，请手动复制');
        console.error('Failed to copy SN:', error);
      }
    } else {
      message.warning('SN码为空');
    }
  };

  if (loading) {
    return (
      <div
        style={{
          padding: SPACING.LG,
          display: 'flex',
          justifyContent: 'center',
          alignItems: 'center',
          minHeight: 400,
        }}
      >
        <Spin size="large" tip="加载中..." />
      </div>
    );
  }

  return (
    <div style={{ padding: SPACING.LG }}>
      <Title level={3}>站点信息</Title>

      <Form
        form={form}
        layout="horizontal"
        labelCol={{ span: 6 }}
        wrapperCol={{ span: 14 }}
        size="large"
        style={{ marginTop: SPACING.LG }}
      >
        {/* SN码 */}
        <Form.Item label="SN码">
          <Space.Compact style={{ width: '100%' }}>
            <Input style={{ width: '90%' }} disabled value={sn || ''} />
            <Button
              style={{ width: '10%', height: 'auto' }}
              icon={<CopyOutlined />}
              onClick={handleCopySN}
              title="复制SN码"
            />
          </Space.Compact>
        </Form.Item>

        {/* 站点名称 */}
        <Form.Item
          label="站点名称"
          name="siteName"
          rules={[
            { required: true, message: '请输入站点名称' },
            { max: 50, message: '站点名称最多50个字符' },
          ]}
          tooltip="用于标识此 DICOM 站点的名称"
        >
          <Input placeholder="请输入站点名称" allowClear />
        </Form.Item>

        {/* AE Title */}
        <Form.Item
          label="AE Title"
          name="aeTitle"
          rules={[
            { required: true, message: '请输入 AE Title' },
            { max: 16, message: 'AE Title 最多16个字符' },
            {
              pattern: /^[A-Z0-9_]+$/,
              message: 'AE Title 只能包含大写字母、数字和下划线',
            },
          ]}
          tooltip="DICOM 应用实体标题，必须唯一"
        >
          <Input
            placeholder="请输入 AE Title"
            onChange={handleAETitleChange}
            maxLength={16}
            allowClear
          />
        </Form.Item>

        {/* 端口 */}
        <Form.Item
          label="端口"
          name="port"
          rules={[
            { required: true, message: '请输入端口号' },
            {
              type: 'number',
              min: 1,
              max: 65535,
              message: '端口号范围：1-65535',
            },
          ]}
          tooltip="DICOM 通信端口，默认为 104"
        >
          <InputNumber
            placeholder="请输入端口号"
            style={{ width: '100%' }}
            min={1}
            max={65535}
          />
        </Form.Item>

        {/* 机构名称 */}
        <Form.Item
          label="机构名称"
          name="institutionName"
          rules={[{ max: 100, message: '机构名称最多100个字符' }]}
        >
          <Input placeholder="请输入机构名称（可选）" allowClear />
        </Form.Item>

        {/* 站点编码 */}
        <Form.Item
          label="站点编码"
          name="siteCode"
          rules={[{ max: 20, message: '站点编码最多20个字符' }]}
          tooltip="用于系统内部识别的唯一编码"
        >
          <Input placeholder="请输入站点编码（可选）" allowClear />
        </Form.Item>

        {/* 描述 */}
        <Form.Item
          label="描述"
          name="description"
          rules={[{ max: 500, message: '描述最多500个字符' }]}
        >
          <TextArea
            placeholder="请输入站点描述（可选）"
            rows={4}
            showCount
            maxLength={500}
            allowClear
          />
        </Form.Item>

        {/* 操作按钮 */}
        <Form.Item wrapperCol={{ offset: 6, span: 14 }}>
          <Space>
            <Button
              type="primary"
              onClick={handleSave}
              loading={saving}
              disabled={loading}
            >
              保存
            </Button>
            <Button onClick={handleReset} disabled={loading || saving}>
              重置
            </Button>
          </Space>
        </Form.Item>
      </Form>
    </div>
  );
};

export default SiteInfo;