/*
 * @Descripttion: 广东材料信息价格获取（通过造价通接口）
 * @Author: vian
 * @Date: 2020-09-29 11:22:59
 */

module.exports = {
  crawlData,
};

const uuidV1 = require('uuid/v1');
const mongoose = require('mongoose');
const axios = require('axios');
const querystring = require('querystring');

const priceInfoLibModel = mongoose.model('std_price_info_lib');
const priceInfoClassModel = mongoose.model('std_price_info_class');
const priceInfoAreaModel = mongoose.model('std_price_info_areas');
const priceInfoItemModel = mongoose.model('std_price_info_items');
const priceInfoSourceModel = mongoose.model('std_price_info_source');
const gljLibModel = mongoose.model('std_glj_lib_map');
const gljClassModel = mongoose.model('std_glj_lib_gljClass');

// 造价通网页上整理的地区https://gd.zjtcn.com/gov/c_cs_d_t_p1.html
const areas = [
  { city: '广州市', county: '广州市' },
  { city: '广州市', county: '花都区' },
  { city: '广州市', county: '增城市' },
  { city: '广州市', county: '从化市' },
  { city: '韶关市', county: '韶关市' },
  { city: '韶关市', county: '乐昌市' },
  { city: '深圳市', county: '深圳市' },
  { city: '珠海市', county: '珠海市' },
  { city: '汕头市', county: '汕头市' },
  { city: '汕头市', county: '濠江区' },
  { city: '汕头市', county: '潮阳区' },
  { city: '汕头市', county: '潮南区' },
  { city: '汕头市', county: '澄海区' },
  { city: '汕头市', county: '南澳县' },
  { city: '佛山市', county: '佛山市' },
  { city: '佛山市', county: '南海区' },
  { city: '佛山市', county: '顺德区' },
  { city: '江门市', county: '江门市' },
  { city: '江门市', county: '新会区' },
  { city: '江门市', county: '台山市' },
  { city: '江门市', county: '开平市' },
  { city: '江门市', county: '鹤山市' },
  { city: '江门市', county: '恩平市' },
  { city: '湛江市', county: '湛江市' },
  { city: '湛江市', county: '遂溪县' },
  { city: '湛江市', county: '徐闻县' },
  { city: '湛江市', county: '廉江市' },
  { city: '湛江市', county: '雷州市' },
  { city: '湛江市', county: '吴川市' },
  { city: '茂名市', county: '茂名市' },
  { city: '茂名市', county: '电白市' },
  { city: '茂名市', county: '高州市' },
  { city: '茂名市', county: '化州市' },
  { city: '茂名市', county: '信宜市' },
  { city: '肇庆市', county: '肇庆市' },
  { city: '肇庆市', county: '鼎湖区' },
  { city: '肇庆市', county: '广宁县' },
  { city: '肇庆市', county: '怀集县' },
  { city: '肇庆市', county: '封开县' },
  { city: '肇庆市', county: '德庆县' },
  { city: '肇庆市', county: '高要市' },
  { city: '肇庆市', county: '四会市' },
  { city: '惠州市', county: '惠州市' },
  { city: '惠州市', county: '惠阳区' },
  { city: '惠州市', county: '大亚湾开发区' },
  { city: '惠州市', county: '博罗县' },
  { city: '惠州市', county: '惠东县' },
  { city: '惠州市', county: '龙门县' },
  { city: '梅州市', county: '梅州市' },
  { city: '梅州市', county: '梅县' },
  { city: '梅州市', county: '大埔县' },
  { city: '梅州市', county: '丰顺县' },
  { city: '梅州市', county: '平远县' },
  { city: '汕尾市', county: '汕尾市' },
  { city: '汕尾市', county: '海丰县' },
  { city: '汕尾市', county: '陆河县' },
  { city: '河源市', county: '河源市' },
  { city: '河源市', county: '紫金县' },
  { city: '河源市', county: '龙川县' },
  { city: '河源市', county: '连平县' },
  { city: '河源市', county: '和平县' },
  { city: '河源市', county: '东源县' },
  { city: '阳江市', county: '阳江市' },
  { city: '阳江市', county: '海陵岛区' },
  { city: '阳江市', county: '阳西县' },
  { city: '阳江市', county: '阳春市' },
  { city: '清远市', county: '清远市' },
  { city: '清远市', county: '佛冈县' },
  { city: '清远市', county: '阳山县' },
  { city: '清远市', county: '连山县' },
  { city: '清远市', county: '连南县' },
  { city: '清远市', county: '英德市' },
  { city: '清远市', county: '连州市' },
  { city: '东莞市', county: '东莞市' },
  { city: '中山市', county: '中山市' },
  { city: '潮州市', county: '潮州市' },
  { city: '潮州市', county: '潮安县' },
  { city: '潮州市', county: '饶平县' },
  { city: '揭阳市', county: '揭阳市' },
  { city: '揭阳市', county: '揭西县' },
  { city: '揭阳市', county: '惠来县' },
  { city: '揭阳市', county: '普宁市' },
  { city: '云浮市', county: '云浮市' },
  { city: '云浮市', county: '新兴县' },
  { city: '云浮市', county: '郁南县' },
  { city: '云浮市', county: '罗定市' },
];

const TIME_OUT = 120000;

// 创建axios实例
const axiosInstance = axios.create({
  baseURL: 'http://api.zjtcn.com/user',
  timeout: TIME_OUT,
  proxy: {
    host: "127.0.0.1", port: "8888" // Fiddler抓包，需要打开Fiddler否则会报connect error
  },
  headers: {
    'Cache-Control': 'max-age=0',
    'Content-Type': 'application/x-www-form-urlencoded',
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.89 Safari/537.36',
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
    'Accept-Encoding': 'gzip, deflate',
    'Accept-Language': 'zh-TW,zh;q=0.9,en-US;q=0.8,en;q=0.7,zh-CN;q=0.6',
  },
  //responseType: 'document'
});

// 响应拦截器
axiosInstance.interceptors.response.use(function (response) {
  return response.data;
}, function (error) {
  // 对响应错误做点什么
  if (error.message.includes('timeout')) {
    return Promise.reject(`目标网络超时，请稍后再试。(${TIME_OUT}ms)`);
  } else {
    return Promise.reject(error);
  }
});

async function post(url, data) {
  return await axiosInstance.post(url, querystring.stringify(data));
}

// 有效期一年，通过购买造价通服务获得
const SERVICE_ID = '2020090003';
const SERVICE_KEY = '97F2A441633F10DFEB5BFC29B3862847';

// 获取后续获取信息价期刊必要的token
async function getToken() {
  // 获取动态码
  const dynData = await post('/dyn_code', { service_id: SERVICE_ID });
  if (!dynData.response_code) {
    throw `错误代号${dynData.retCode} 获取动态码失败。`;
  }
  // 获取加密字符串
  const serviceSecret = await post('/aes', { service_id: SERVICE_ID, service_key: SERVICE_KEY, service_code: dynData.response_code });
  if (typeof serviceSecret !== 'string') {
    throw `错误代号${serviceSecret.retCode} 获取加密字符串错误。`;
  }
  const tokenData = await post('/authentication', { service_id: SERVICE_ID, service_secret: serviceSecret });
  if (!tokenData.token) {
    throw `错误代号${tokenData.retCode} 获取token失败。`
  }
  return tokenData.token;
}

const monthMap = {
  '1': '01月',
  '2': '02月',
  '3': '03月',
  '4': '04月',
  '5': '05月',
  '6': '06月',
  '7': '07月',
  '8': '08月',
  '9': '09月',
  '10': '10月',
  '11': '11月',
  '12': '12月',
};

// 根据期数范围，获取期数数据
function getPeriodData(from, to) {
  if (from > to) {
    return null;
  }
  const reg = /(\d+)-(\d+)/;
  const fromMatch = from.match(reg);
  const fromYear = +fromMatch[1];
  const fromMonth = +fromMatch[2];
  const toMatch = to.match(reg);
  const toYear = +toMatch[1];
  const toMonth = +toMatch[2];
  let curYear = fromYear;
  let curMonth = fromMonth;
  const periods = [];
  while (curYear <= toYear && curMonth <= toMonth) {
    periods.push(`${curYear}年-${monthMap[curMonth]}`);
    if (curMonth === 12) {
      curYear++;
      curMonth = 1;
    } else {
      curMonth++;
    }
  }
  return periods;
}

// 获取信息价期刊
async function getPriceInfoSource(token, period, city, county) {
  const province = '广东';
  const area = `${province}-${city}-${county}`;
  const industry = 1;
  const existData = await priceInfoSourceModel.find({ period, area, industry }).lean();
  if (existData.length) {
    return existData;
  }
  const body = {
    token,
    province,
    city,
    county,
    industry,
    date: `${period}-05` // 天数05表示请求月度数据
  };
  const sourceData = await post('/gov/get', body);
  if (!sourceData.results) {
    // 不抛出错误，不同地区更新信息价期刊的时间不同，如果导入数据时，有地区没发布数据，直接跳过并提示
    return `retCode: ${sourceData.retCode} ${sourceData.msg} (${period} ${city} ${county})`;
  }
  // 因为造价通接口请求有次数限制，一个地区只能请求一次，为保险起见，将造价通源数据入库
  const insertData = sourceData.results.map(item => ({
    period,
    area,
    industry,
    subcid: item.subcid,
    code: item.code,
    name: item.name,
    unit: item.unit,
    price: item.price,
    taxPrice: item.tax_price,
    noTaxPrice: item.no_tax_price,
    specs: item.spec,
    remark: item.notes,
  }));
  if (insertData.length) {
    await priceInfoSourceModel.insertMany(insertData);
  }
  return insertData;
}

// 获取数据subcid与分类名称的映射表
async function getClassNameMap(compilationID) {
  const gljLib = await gljLibModel.findOne({ compilationId: compilationID }).lean();
  if (!gljLib) {
    return null;
  }
  const classData = await gljClassModel.find({ repositoryId: gljLib.ID }).lean();
  const map = {};
  const reg = /^\d{4}/;
  classData.forEach(item => {
    const name = item.Name || '';
    const matched = name.match(reg);
    if (matched) {
      map[matched[0]] = name;
    }
  });
  return map;
}

/**
 * 将信息价源数据转换入库
 * @param {String} compilationID - 费用定额ID
 * @param {String} period - 期数 eg: 2020年-09月
 * @param {String} area - 地区 eg: 广州市-广州市
 * @param {Array} sourceData - 造价通源数据
 * @param {Object} classNameMap - 从标准人材机分类树获取的编号-名称映射表
 * @return {Void}
 */
async function saveData(compilationID, period, area, sourceData, classNameMap) {
  let areaItem = await priceInfoAreaModel.findOne({ compilationID, name: area }).lean();
  if (!areaItem) {
    areaItem = { compilationID, ID: uuidV1(), name: area };
    await priceInfoAreaModel.insertMany([areaItem]);
  }
  let lib = await priceInfoLibModel.findOne({ compilationID, period }).lean();
  if (!lib) {
    lib = {
      compilationID,
      period,
      ID: uuidV1(),
      name: `信息价(${period})`,
      createDate: Date.now()
    };
    await priceInfoLibModel.insertMany([lib]);
  }
  const areaID = areaItem.ID;
  const libID = lib.ID;
  // 如果该期数该地区下存在数据，则不处理，防止重复插入数据
  // 造价通地区数据更新不同步，可能需要多次导入数据补全一期数据，如果已经有数据，说明该地区已经导入成功过了，直接跳过
  const existCount = await priceInfoItemModel.count({ compilationID, period, areaID });
  if (existCount) {
    return;
  }
  // 分类数据应为空才对，如果有就清空
  const existClassCount = await priceInfoClassModel.count({ libID: lib.ID, areaID });
  if (existClassCount) {
    await priceInfoClassModel.remove({ libID: lib.ID, areaID });
  }
  // 导入分类数据及价格信息数据
  const otherClassName = '其他';
  const curClassMap = {
    [otherClassName]: { libID, areaID, ID: uuidV1(), ParentID: '-1', name: otherClassName }
  };
  const classData = [];
  const priceData = [];
  const splitReg = /([0-9.]+)-([0-9.]+)/;
  let needOtherClass = false;
  sourceData.forEach(item => {
    const className = classNameMap[item.subcid] || otherClassName;
    if (className === otherClassName) {
      needOtherClass = true;
    }
    if (!curClassMap[className]) {
      const classItem = { libID, areaID, ID: uuidV1(), ParentID: '-1', NextSiblingID: '-1', name: className };
      curClassMap[className] = classItem;
      const preClassData = classData[classData.length - 1];
      if (preClassData) {
        preClassData.NextSiblingID = classItem.ID;
      }
      classData.push(classItem);
    }
    const classID = curClassMap[className].ID;
    const price = item.price || '';
    const matchSplitPrice = price.match(splitReg);
    if (matchSplitPrice) { // 价格字段是区间，需要分割成最低价、最高价两条数据
      const minPrice = matchSplitPrice[1];
      const maxPrice = matchSplitPrice[2];
      priceData.push(transfromSourceItemToPriceItem(item, classID, `${item.name}-最低价`, minPrice));
      priceData.push(transfromSourceItemToPriceItem(item, classID, `${item.name}-最高价`, maxPrice));
    } else {
      priceData.push(transfromSourceItemToPriceItem(item, classID, item.name, item.noTaxPrice));
    }
  });
  if (needOtherClass) {
    const otherClassItem = curClassMap[otherClassName];
    otherClassItem.NextSiblingID = classData[0].ID;
    classData.push(otherClassItem);
  }
  const task = [
    priceInfoClassModel.insertMany(classData),
    priceInfoItemModel.insertMany(priceData)
  ];
  await Promise.all(task);
  // 将信息价源数据转换成信息价数据
  function transfromSourceItemToPriceItem(sourceItem, classID, name, noTaxPrice) {
    return {
      compilationID,
      period,
      name,
      noTaxPrice,
      classID,
      libID,
      areaID,
      ID: uuidV1(),
      code: sourceItem.subcid,
      unit: sourceItem.unit,
      specs: sourceItem.specs,
      taxPrice: sourceItem.taxPrice,
      remark: sourceItem.remark,
    };
  }
}

/**
 * 获取数据
 * @param {String} from - 从哪一期开始 eg: 2020-01
 * @param {String} to - 从哪一期结束 eg: 2020-05
 * @param {String} compilationID - 费用定额ID
 * @return {Object}
 */
async function crawlData(from, to, compilationID) {
  const token = await getToken();
  const periods = getPeriodData(from, to);
  if (!periods) {
    throw '无效的期数区间。';
  }
  const classNameMap = await getClassNameMap(compilationID);
  if (!classNameMap) {
    throw '无有效的分类数据。';
  }
  const hintInfos = [];
  for (const period of periods) {
    const sourcePeriod = period.replace(/年|月/g, '');
    for (const { city, county } of areas) {
      const sourceData = await getPriceInfoSource(token, sourcePeriod, city, county);
      if (typeof sourceData === 'string') {
        hintInfos.push(sourceData);
        continue;
      }
      if (!sourceData.length) {
        continue;
      }
      await saveData(compilationID, period, `${city}-${county}`, sourceData, classNameMap);
    }
  }
  if (hintInfos.length) {
    throw hintInfos.join('\n');
  }
}