const axios = require('axios');
const login = require('./loginApi.js');
/**
 * 钢材价格数据采集服务
 * 从德钢云平台获取价格数据
 */
class SteelPriceCollector {
  constructor() {
    this.baseURL = 'https://xdwlgyl.yciccloud.com';
    this.pageId = 'PG-D615-D8E2-2FD84B8D';
    this.menuId = 'MK-A8B8-109E-13D34116';
  }

  /**
   * 构建请求配置（先获取 Token）
   * @param {Object} params - 查询参数
   * @param {string} params.startDate - 开始日期 (YYYY-MM-DD)
   * @param {string} params.endDate - 结束日期 (YYYY-MM-DD)
   * @param {number} params.page - 页码，默认1
   * @param {number} params.pageSize - 每页大小，默认1000
   * @returns {Promise<Object>} Axios请求配置
   */
  async _buildConfig(params = {}) {
    const {
      startDate = new Date().toISOString().split('T')[0],
      endDate = new Date(Date.now() + 365 * 24 * 60 * 60 * 1000).toISOString().split('T')[0],
      page = 1,
      pageSize = 10
    } = params;

    // 先获取 Token
    console.log('🔐 正在获取 Token...');
    const tokenResult = await login.getToken();

    if (!tokenResult.success) {
      throw new Error(`Token 获取失败: ${tokenResult.error}`);
    }

    const tokenId = tokenResult.data;
    console.log('✅ Token 获取成功:', tokenId);

    // 构建查询条件对象
    const searchParams = {
      _PIRCE_DATE_DATE_START_: startDate,
      _PIRCE_DATE_DATE_END_: endDate,
      PARTSNAME_NAME: null,
      _PARTSNAME_NAME_ADVANCE_SEARCH_: null,
      _PARTSNAME_NAME_IS_LIKE_: '1',
      GOODS_MATERIAL: null,
      _GOODS_MATERIAL_ADVANCE_SEARCH_: null,
      _GOODS_MATERIAL_IS_LIKE_: '1',
      GOODS_SPEC: null,
      _GOODS_SPEC_ADVANCE_SEARCH_: null,
      _GOODS_SPEC_IS_LIKE_: '1',
      PRODUCTAREA_NAME: null,
      _PRODUCTAREA_NAME_ADVANCE_SEARCH_: null,
      _PRODUCTAREA_NAME_IS_LIKE_: '1',
      PNTREE_NAME: null,
      _PNTREE_NAME_ADVANCE_SEARCH_: null,
      _PNTREE_NAME_IS_LIKE_: '1',
      OPERATOR_NAME: null,
      _OPERATOR_NAME_ADVANCE_SEARCH_: null,
      PR_PRICE_REGION: null,
      _PR_PRICE_REGION_ADVANCE_SEARCH_: null,
      OPERATOR_CODE: null,
      PRICE_ID: null,
      _orderFields_: []
    };

    // 构建URL编码的请求体
    const requestData = new URLSearchParams({
      pageId: this.pageId,
      pageSize: pageSize.toString(),
      page: page.toString(),
      isPageNoChange: '0',
      ctrlId: 'mainTable',
      json: JSON.stringify(searchParams),
      searchBoxId: 'searchForm',
      groupSumFields: JSON.stringify([])
    });

    // 使用获取到的 Token 构建 Cookie
    const cookie = `SameSite=Lax; HWWAFSESTIME=1767596069712; HWWAFSESID=e2b2773ee2641b98e5; SameSite=Lax; SYS-A7EE-D0E8-BE614B80=1108@${tokenId}; JSESSIONID=2389858DBE6A7EDAF695C767A764995B; SameSite=Lax`;

    return {
      method: 'POST',
      url: `${this.baseURL}/gdpaas/mainpage/findPage.htm?_p_=${this.pageId}`,
      headers: {
        'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
        'Accept': 'application/json, text/javascript, */*; q=0.01',
        'X-Requested-With': 'XMLHttpRequest',
        'Pageid': 'PG_D615_D8E2_2FD84B8D',
        'Menuid': this.menuId,
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
        'Referer': `${this.baseURL}/gdpaas/home/index.htm`,
        'Origin': this.baseURL,
        'Accept-Language': 'zh-CN,zh;q=0.9',
        'Accept-Encoding': 'gzip, deflate, br',
        'Sec-Fetch-Site': 'same-origin',
        'Sec-Fetch-Mode': 'cors',
        'Sec-Fetch-Dest': 'empty',
        'Sec-Ch-Ua': '"Not_A Brand";v="8", "Chromium";v="120", "Google Chrome";v="120"',
        'Sec-Ch-Ua-Mobile': '?0',
        'Sec-Ch-Ua-Platform': '"Windows"',
        'cookie': cookie
      },
      data: requestData.toString()
    };
  }

  /**
   * 获取钢材价格数据
   * @param {Object} params - 查询参数
   * @returns {Promise<Object>} 响应数据
   */
  async fetchPrices(params = {}) {
    try {
      const config = await this._buildConfig(params);
      const response = await axios.request(config);

      // 验证响应数据
      if (!response.data) {
        throw new Error('响应数据为空');
      }

      return {
        success: true,
        data: response.data,
        timestamp: new Date().toISOString()
      };
    } catch (error) {
      return {
        success: false,
        error: error.message,
        timestamp: new Date().toISOString()
      };
    }
  }
}

/**
 * 导出单例实例
 */
module.exports = new SteelPriceCollector();

/**
 * 如果直接运行此文件，执行示例请求
 */
if (require.main === module) {
  const collector = require('./commonApi.js');

  // 示例：获取最近一年的价格数据
  collector.fetchPrices({
    startDate: '2025-01-06',
    endDate: '2026-01-06',
    page: 1,
    pageSize: 1
  })
    .then(result => {
      if (result.success) {
        console.log('✅ 数据获取成功');
        console.log('📅 时间:', result.timestamp);
        console.log('📊 数据预览:', JSON.stringify(result.data, null, 2));
      } else {
        console.error('❌ 数据获取失败:', result.error);
      }
    })
    .catch(error => {
      console.error('💥 未捕获的错误:', error);
    });
}