import dayjs from "./moment";


const PARAMS = {
  /* 省,直辖市代码表 */
  provinceAndCitys: {
    11: '北京',
    12: '天津',
    13: '河北',
    14: '山西',
    15: '内蒙古',
    21: '辽宁',
    22: '吉林',
    23: '黑龙江',
    31: '上海',
    32: '江苏',
    33: '浙江',
    34: '安徽',
    35: '福建',
    36: '江西',
    37: '山东',
    41: '河南',
    42: '湖北',
    43: '湖南',
    44: '广东',
    45: '广西',
    46: '海南',
    50: '重庆',
    51: '四川',
    52: '贵州',
    53: '云南',
    54: '西藏',
    61: '陕西',
    62: '甘肃',
    63: '青海',
    64: '宁夏',
    65: '新疆',
    71: '台湾',
    81: '香港',
    82: '澳门',
    91: '国外'
  },

  /* 每位加权因子 */
  powers: [
    '7',
    '9',
    '10',
    '5',
    '8',
    '4',
    '2',
    '1',
    '6',
    '3',
    '7',
    '9',
    '10',
    '5',
    '8',
    '4',
    '2'
  ],

  /* 第18位校检码 */
  parityBit: ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'],

  /* 性别 */
  genders: {1: '男', 0: '女'},
}

const Check = {
  /* 校验地址码 */
  checkAddressCode(addressCode) {
    const check = /^[1-9]\d{5}$/.test(addressCode)
    if (!check) return false
    return !!PARAMS.provinceAndCitys[parseInt(addressCode.substring(0, 2))]
  },
  /* 校验日期码 */
  checkBirthDayCode(birDayCode) {
    const check = /^[1-9]\d{3}((0[1-9])|(1[0-2]))((0[1-9])|([1-2][0-9])|(3[0-1]))$/.test(
        birDayCode
    )
    if (!check) return false
    const yyyy = parseInt(birDayCode.substring(0, 4), 10)
    const mm = parseInt(birDayCode.substring(4, 6), 10)
    const dd = parseInt(birDayCode.substring(6), 10)
    const xdata = new Date(yyyy, mm - 1, dd)
    if (xdata > new Date()) {
      return false // 生日不能大于当前日期
    } else {
      return (
          xdata.getFullYear() == yyyy &&
          xdata.getMonth() == mm - 1 &&
          xdata.getDate() == dd
      )
    }
  },
  /* 验证校检码 */
  checkParityBit(idCardNo) {
    const parityBit = idCardNo.charAt(17).toUpperCase()
    return this.getParityBit(idCardNo) == parityBit
  },
// 校验15位的身份证号码
  check15IdCardNo(idCardNo) {
    // 15位身份证号码的基本校验
    let check = /^[1-9]\d{7}((0[1-9])|(1[0-2]))((0[1-9])|([1-2][0-9])|(3[0-1]))\d{3}$/.test(
        idCardNo
    )
    if (!check) return false
    // 校验地址码
    const addressCode = idCardNo.substring(0, 6)
    check = this.checkAddressCode(addressCode)
    if (!check) return false
    const birDayCode = '19' + idCardNo.substring(6, 12)
    // 校验日期码
    return this.checkBirthDayCode(birDayCode)
  },

// 校验18位的身份证号码
  check18IdCardNo(idCardNo) {
    // 18位身份证号码的基本格式校验
    let check = /^[1-9]\d{5}[1-9]\d{3}((0[1-9])|(1[0-2]))((0[1-9])|([1-2][0-9])|(3[0-1]))\d{3}(\d|x|X)$/.test(
        idCardNo
    )
    if (!check) return false
    // 校验地址码
    const addressCode = idCardNo.substring(0, 6)
    check = this.checkAddressCode(addressCode)
    if (!check) return false
    // 校验日期码
    const birDayCode = idCardNo.substring(6, 14)
    check = this.checkBirthDayCode(birDayCode)
    if (!check) return false
    // 验证校检码
    return this.checkParityBit(idCardNo)
  },
  /* 计算校检码 */
  getParityBit(idCardNo) {
    const id17 = idCardNo.substring(0, 17)
    /* 加权 */
    let power = 0
    for (let i = 0; i < 17; i++) {
      power += parseInt(id17.charAt(i), 10) * parseInt(PARAMS.powers[i])
    }
    /* 取模 */
    const mod = power % 11
    return PARAMS.parityBit[mod]
  }
}

export default class Identity {
  constructor(code) {
    this.code = this.getId18(code)
    this.init()
  }

  init() {
    const {code} = this
    if (!!code) {
      this.hideCode = Identity.hideId(code)
      this.getIdCardInfo(code)
    }
  }

  static hideId(code) {
    return code?.replace(/^(\d{10})\d{4}(.{4}$)/g, `$1${Array(5).join('*')}$2`)
  }

  getId18(code) {
    if (code.length == 15) {
      const id17 = code.substring(0, 6) + '19' + code.substring(6)
      const parityBit = Check.getParityBit(id17)
      return id17 + parityBit
    } else if (code.length == 18) {
      return code
    } else {
      return null
    }
  }

  getIdCardInfo(idCardNo) {
    this.birthday = Identity.getBirthday(idCardNo)
    this.sex = Identity.getSex(idCardNo)
    this.gender = PARAMS.genders[this.sex]
    this.age = Identity.getAge(idCardNo)
    this.areaId = Identity.getArea(idCardNo)
  }

  /**
   * 获取性别
   * @param code
   * @returns {string}
   */
  static getSex(code) {
    return (Number(code.substring(16, 17)) % 2).toString()
  }

  /**
   * 获取年龄
   * @param code
   * @returns {number}
   */
  static getAge(code) {
    const birthday = dayjs(code.substring(6, 14), 'YYYYMMDD')
    return Math.ceil(dayjs.duration(dayjs().unix() - dayjs(birthday).unix(), 's').asYears())
  }

  /**
   * 获取地区编码
   * @param code
   */
  static getArea(code) {
    return code.substring(0, 6) + new Array(7).join(0)
  }

  /**
   * 获取生日
   */
  static getBirthday(code) {
    return dayjs(code.substring(6, 14), 'YYYYMMDD').format("YYYY-MM-DD").replace('Invalid Date', '')
  }

  /* 校验15位或18位的身份证号码 */
  static check(idCardNo) {
    // 15位和18位身份证号码的基本校验
    const check = /^\d{15}|(\d{17}(\d|x|X))$/.test(idCardNo)
    if (!check) return false
    // 判断长度为15位或18位
    if (idCardNo.length == 15) {
      return Check.check15IdCardNo(idCardNo)
    } else if (idCardNo.length == 18) {
      return Check.check18IdCardNo(idCardNo)
    } else {
      return false
    }
  }
}