import request from "./request";


export default class Area {
  constructor(code, hash = {}) {
    this.id = code
    this.level = Area.getLevelByAreaId(code)
    this.areaMap = Object.values(this.getAreaInfo(code))
    if (Object.keys(hash).length > 0) {
      this.getName(this.areaMap.map(id => hash[id]))
    }
  }

  /**
   * 获取地区的行政等级
   * @param code 地区编码
   * @returns {number}
   */
  static getLevelByAreaId(code) {
    if (code) {
      if (code.length === 2 || /0{10}$/.test(code)) return 0;
      else if (/0{8}$/.test(code)) return 1;
      else if (/0{6}$/.test(code)) return 2;
      else if (/0{3}$/.test(code)) return 3;
      else return 4
    } else return -1
  }

  /**
   * 根据地区编码获取指定等级的地区编码
   * @param value 地区编码
   * @param level 指定等级
   * @returns {string|null|*}
   */
  static getAreaCodeByLevel(value, level) {
    if (value) {
      const areaNumber = value.toString();
      switch (level) {
        case 0:
          return areaNumber.substring(0, 2) + '0000000000';
        case 1:
          return areaNumber.substring(0, 4) + '00000000';
        case 2:
          return areaNumber.substring(0, 6) + '000000';
        case 3:
          return areaNumber.substring(0, 9) + '000';
        case 4:
          return areaNumber
      }
    } else return null
  }

  static createByAction(areaId, ins = request, action = "/admin/area/getAllParentAreaId") {
    return ins.post(action, null, {params: {areaId}, withoutToken: 1}).then(res => res?.data?.reverse() || [])
  }

  getAreaInfo(id) {
    let info = {}
    const currentLevel = Area.getLevelByAreaId(id);
    for (let i = 0; i <= currentLevel; i++) {
      info[i] = Area.getAreaCodeByLevel(id, i);
    }
    return info
  }

  async getAreaName() {
    const names = await Area.createByAction(this.id);
    this.getName(names)
  }

  getName(names) {
    this.meta = names
    this.nameMap = names?.map(e => e.name) || []
    this.name = names?.slice(-1)?.[0]?.name
    this.fullname = this.nameMap.join('')
  }

  /**
   * 异步从数据库中获取地区信息
   * @returns {Promise<void>}
   */
  static async init(code) {
    const names = await Area.createByAction(code),
        area = new Area(code)
    area.getName(names)
    return area
  }
}