import * as querystring from 'querystring';
import * as crypto from 'crypto';
import * as Joi from 'joi';

/**
* Default endPoint
*/
const EndPoint: string = 'https://api.einvoice.nat.gov.tw';

/**
 * `TaiwanEInvoice` is a class that wraps Taiwan e-invoice API.
 */
export class TaiwanEInvoice {
  /**
  * Sort request parameters by key in ascending order.
  * Must use before `signature`.
  * @param param unsort request parameters.
  */
  static paramSort(param: APIRequest.DefinedParameter) {
    return Object.keys(param).sort().reduce((acc: any, k) => {
      acc[k] = param[k];
      return acc;
    }, {});
  }
  /**
  * App ID,apply from [MOF E-Invoice platform](https://www.einvoice.nat.gov.tw/APMEMBERVAN/APIService/Registration).
  */
  appID: string;
  /**
  * API Key,apply from [MOF E-Invoice platform](https://www.einvoice.nat.gov.tw/APMEMBERVAN/APIService/Registration).
  */
  apiKey: string;
  /**
  *UUID,universally unique identifier of inquirer
  */
  uuID: string = '';
  /**
  *txID,Transaction ID of inquirer
  */
  txID: string = '';
  /**
  * inquirer's identity.
  */
  identity: InquirerIdentity = InquirerIdentity.Common;
  /**
  * Constructor
  * @param appID App ID,apply from [MOF E-Invoice platform](https://www.einvoice.nat.gov.tw/APMEMBERVAN/APIService/Registration).
  * @param apiKey API Key,apply from [MOF E-Invoice platform](https://www.einvoice.nat.gov.tw/APMEMBERVAN/APIService/Registration).
  */
  constructor(appID: string, apiKey: string) {
    //super();
    this.appID = appID;
    this.apiKey = apiKey;
  }
  /**
  * Tell API the UUID or the txID of the inquirer.
  * @param id UUID or txID .
  * @param identity inquirer's identity. Default is `InquirerIdentity.Common` . (Optional)
  */
  inquirer(id: string, identity?: InquirerIdentity): TaiwanEInvoice {
    switch (identity) {
      case InquirerIdentity.Common:
        this.identity = identity;
        this.uuID = id;
        break;
      case InquirerIdentity.BusinessEntity:
        this.identity = identity;
        this.txID = id;
        break;
      default:
        this.uuID = id;
        if (identity !== undefined)
          throw new Error(`Invalid inquirer identity.`);
    }
    return this;
  }
  /**
  *
  * @param action request parameter `action` literal specified in the API
  * @param param other request parameters specified in the API
  */
  action(action: string, param: APIRequest.DefinedParameter) {
    if (typeof param !== 'object')
      throw new Error('param must be specified an plain object.');

    let actions: any = undefined;
    let configs: APIRequest.ConfigStruct[] | undefined = undefined;
    switch (this.identity) {
      case InquirerIdentity.Common:
        actions = RequestCommonAction;//real object at runtime
        configs = APIRequest.CommonConfigs;
        break;
      case InquirerIdentity.BusinessEntity:
        actions = RequestBusinessuAction;//real object at runtime
        configs = APIRequest.BusinessConfigs;
        break;
      default:
        throw new Error(`Invalid inquirer identity.`);
    }

    let actionIndex = actions[action];
    if (actionIndex === undefined)
      throw new Error(`Invalid request action '${action}'`);

    let config: APIRequest.ConfigStruct = configs[actionIndex];

    let paramters = { ...param, ...config.stableParam };
    if (paramters.hasOwnProperty('appID')) paramters.appID = this.appID;
    if (paramters.hasOwnProperty('appId')) paramters.appId = this.appID;
    if (paramters.hasOwnProperty('UUID')) paramters.UUID = this.uuID;
    if (paramters.hasOwnProperty('uuid')) paramters.uuid = this.uuID;
    if (paramters.hasOwnProperty('TxID')) paramters.TxID = this.txID;

    //must sort for signature
    paramters = TaiwanEInvoice.paramSort(paramters);

    return new Promise((res, rej) => {
      let { value, error } = Joi.validate(paramters, config.schema, { convert: false });
      if (error) rej(error);

      let { endPoint, path, method, needToSign } = config;
      endPoint = endPoint || EndPoint;

      //convert Date to unix time stamp
      if (value.timeStamp instanceof Date) value.timeStamp = Math.floor(value.timeStamp.getTime() / 1000);
      if (value.expTimeStamp instanceof Date) value.expTimeStamp = Math.floor(value.expTimeStamp.getTime() / 1000);

      //Generate signature from query string.
      if (needToSign) {
        let qstr = querystring.stringify(value, undefined, undefined, {
          encodeURIComponent: querystring.unescape//must unescape
        });
        let hmac = crypto.createHmac('sha1', this.apiKey);//HNAC-SHA1
        hmac.update(qstr);
        value.signature = hmac.digest('base64');
      }

      res({ path: `${endPoint}${path}`, method: method, param: value });
    });

  }
}
/**
* Enumerate inquirer's identity.
*/
export enum InquirerIdentity {
  /**
  * General user identity.
  */
  Common,
  /**
  * Business user identity.
  */
  BusinessEntity
}
/**
* Enumerate card type specified in the API.
*/
export enum CarrierCardType {
  /**
  * Mobile barcode
  */
  Mobile = '3J0002',
  /**
  * EasyCard
  */
  EasyCard = '1K0001',
  /**
  * iPASS
  */
  IPASS = '1H0001',
  /**
  * MOICA Citizen Digital Certificate
  */
  MOICACDC = 'CQ0001',
  /**
  * icash
  */
  ICASH = '2G0001'
}
/**
* Enumerate request parameter `action` literals specified in the API for common user.
*/
enum RequestCommonAction {
  /**
  * Query prize numbers.
  */
  QryWinningList,
  /**
  * Query invoice seller information.
  */
  qryInvHeader,
  /**
  * Query invoice details.
  */
  qryInvDetail,
  /**
  * Query registered Social welfare groups.
  */
  qryLoveCode,
  /**
  * Query seller information about invoices held in the carrier.
  */
  carrierInvChk,
  /**
  * Query details about invoices held in the carrier.
  */
  carrierInvDetail,
  /**
  * Donate the invoice to the social welfare group.
  */
  carrierInvDnt,
  /**
  * Query valid aggregate carriers.
  */
  qryCarrierAgg,
  /**
  * Mobile barcode registration without enter password.
  */
  generalCarrierReg,
  /**
  * Binding financial account or electronic payment account.
  */
  generalCarrierBank,
  /**
  * Query mobile barcode.
  */
  etBarcode,
  /**
  * Mobile barcode registration need enter password.
  */
  pubCarVerReg,
  /**
  * Change password.
  */
  changeVer,
  /**
  * Forget password.
  */
  forgetVer,
  /**
  * Carrier aggregate to mobile barcode.
  */
  carrierAction
}
/**
* Enumerate request parameter `action` literals specified in the API for common user.
*/
enum RequestBusinessuAction {
  /**
  * Verify whether the mobile barcode exists on the e-invoice platform.
  */
  bcv,
  /**
  * Verify whether the LoveCode exists on the e-invoice platform.
  */
  preserveCodeCheck,
  /**
  * Query BIN of the credit card carrier.
  */
  cardBin,
  /**
  * Query bankNo of the credit card carrier.
  */
  creditCardBan,
  /**
  * Query receive route status.
  */
  qryRecvRout,
  /**
  * Query whether is business entity.
  */
  qryBanUnitTp
}
/**
* Inner module.Define default request config with the API spec .
*/
export namespace APIRequest {
  /**
  * Enumerate HTTP request methods.
  */
  export enum Method {
    GET = 'GET',
    POST = 'POST'
  }
  /**
  * All request parameters defined in the API.
  */
  export interface DefinedParameter {
    [x: string]: any,
    TxID?: string,
    UUID?: string,
    accountNo?: string,//Bank account (require if updateAcc = 'Y')
    action?: string,
    amount?: string,//Money amount (Optional)
    appID?: string,
    appId?: string,
    ban?: string,//Business Administration Number
    bankNo?: string,//SWIFT Code
    barCode?: string,//Mobile barcode
    cardEncrypt?: string,//Carrier Card or Mobile barcode password
    cardNo?: string,//Carrier Card barcode
    cardType?: CarrierCardType,//Carrier card type
    carrierName?: string,//Custom carriere name
    email?: string,//E-mail for register
    enableRemit?: string,//Enable remittance or not
    encrypt?: string,//Invoice Verification code (require if type = 'QRCode')
    endDate?: string,//Query end time
    expTimeStamp?: Date | number,//Expiration Unix time stamp
    generation?: string,
    invDate?: string,//Invoice Date (yyyy/MM/dd)
    invNum?: string,//Invoice number
    invTerm?: string,//Invoice Term (yyyMM)
    isVerification?: string,//email is verified or not ('Y' | 'N')
    newVerify?: string,//New Mobile barcode password (8-16 length,number & alphabet need)
    npoBan?: string,//Non-profit organizations BAN
    oldVerify?: string,//Old Mobile barcode password
    onlyWinningInv?: string,//Only return the winning information ('Y' | 'N')
    pCode?: string,//Non-profit organizations' Love Code
    phoneNo?: string,//Moblie number
    publicCardNo?: string,//Public carrier Card barcode
    publicCardType?: CarrierCardType,//Public carrier Card type
    publicVerifyCode?: string,//Public carrier Card password
    qKey?: string,//Query keyword of Non-profit organizations
    randomNumber?: string,//4 digit random code of invoice
    rocID?: string,//R.O.C. ID number (require if updateAcc = 'Y')
    sellerID?: string,//Business Administration Number (require if type = 'QRCode')
    sellerName?: string,//Seller's name (Optional)
    serial?: string,//Transfer serial number (10 digits)
    signature?: string,//signature of query string
    startDate?: string,//Query start time
    timeStamp?: Date | number,//Transfer time stamp
    type?: string,//Bar code type ('Barcode' | 'QRCode')
    updateAcc?: string,//Upadte annotation
    userIdType?: string,//identity, '1' = Citizen | '2' = Foreigner (require if updateAcc = 'Y')
    uuid?: string,
    verificationCode?: string,//Mobile barcode password
    verify?: string,//Mobile barcode password (8-16 length,number & alphabet need.)
    verifyCode?: string,//Carrier Card password
    version: number
    winnerName?: string,//Winner name (require if updateAcc = 'Y')
    winnerPhone?: string//Winner phone (require if updateAcc = 'Y')
  }
  /**
  * Define default request config structure.
  */
  export interface ConfigStruct {
    /**
    * API HTTP Endpoint. It must be specified in `BusinessConfigs` . (Optional)
    */
    endPoint?: string;
    /**
    * HTTP request path of the API.
    */
    path: string;
    /**
    * HTTP request method.
    */
    method: Method;
    /**
    * Need signature or not.
    */
    needToSign: boolean
    /**
    * Stable request parameter of the API.
    */
    stableParam: APIRequest.DefinedParameter;
    /**
    *Schema of request parameters
    */
    schema: Joi.ObjectSchema
  }
  /**
  * invTerm schema
  */
  const Sch_invTerm = Joi.string().regex(/^[0-9]{5}$/, 'yyyMM').required();
  /**
  * invDate schema
  */
  const Sch_invDate = Joi.string().regex(/^[0-9]{4}\/[0-9]{2}\/[0-9]{2}$/, 'yyyy/MM/dd').required();
  /**
  * invNum schema
  */
  const Sch_invNum = Joi.string().regex(/^[A-Z]{2}[0-9]{8}$/, '[A-Z]{2}[0-9]{8}').required();
  /**
  * bar code type schema
  */
  const Sch_barcode = Joi.string().valid('QRCode', 'Barcode').required();
  /**
  * cardType schema
  */
  const Sch_cardType = Joi.string().valid(
    CarrierCardType.EasyCard,
    CarrierCardType.ICASH,
    CarrierCardType.IPASS,
    CarrierCardType.MOICACDC,
    CarrierCardType.Mobile).required();
  /**
  * Y/N schema
  */
  const Sch_YN = Joi.string().valid('Y', 'N').required();
  /**
  * verify code (password) schema
  */
  const Sch_verify = Joi.string().regex(/^(?=.*\d)(?=.*[a-zA-Z])([^'"+=?\\\/\s]){8,16}$/, 'password').required();
  /**
  * digit string schema
  */
  function Sch_digits(n?: number): Joi.StringSchema {
    if (typeof n === 'number') {
      let regex = new RegExp(`^[0-9]{${n}}$`);
      return Joi.string().regex(regex, `${n} digits`).required();
    }

    return Joi.string().regex(/^[0-9]+$/, `only digits`).required();
  }
  /**
  * when condition schema
  */
  function Sch_when(ref: string, opt: Joi.WhenOptions): Joi.AlternativesSchema {
    return Joi.alternatives().when(ref, { is: opt.is, then: opt.otherwise, otherwise: Joi.any().forbidden() })
  }
  /**
  * Default request config for each _Common Action_.
  * Index corresponds to the order of enumeration.
  */
  export const CommonConfigs: ConfigStruct[] = _CommonConfigs();

  function _CommonConfigs(): ConfigStruct[] {
    return [
      {
        path: '/PB2CAPIVAN/invapp/InvApp',
        method: Method.POST,
        needToSign: false,
        stableParam: {
          action: 'QryWinningList',
          version: 0.2,
          UUID: '',
          appID: ''
        },
        schema: Joi.object().keys({
          UUID: Joi.string().required(),
          action: Joi.string().required(),
          appID: Joi.string().required(),
          invTerm: Sch_invTerm,
          version: Joi.number().required()
        })
      },
      {
        path: '/PB2CAPIVAN/invapp/InvApp',
        method: Method.POST,
        needToSign: false,
        stableParam: {
          action: 'qryInvHeader',
          version: 0.3,
          generation: 'V2',
          UUID: '',
          appID: ''
        },
        schema: Joi.object().keys({
          UUID: Joi.string().required(),
          action: Joi.string().required(),
          appID: Joi.string().required(),
          generation: Joi.string().required(),
          invDate: Sch_invDate,
          invNum: Sch_invNum,
          type: Sch_barcode,
          version: Joi.number().required()
        })
      },
      {
        path: '/PB2CAPIVAN/invapp/InvApp',
        method: Method.POST,
        needToSign: false,
        stableParam: {
          action: 'qryInvDetail',
          version: 0.3,
          generation: 'V2',
          UUID: '',
          appID: ''
        },
        schema: Joi.object().keys({
          UUID: Joi.string().required(),
          action: Joi.string().required(),
          appID: Joi.string().required(),
          encrypt: Sch_when('type', { is: 'QRCode', then: Joi.string().required() }),
          generation: Joi.string().required(),
          invDate: Sch_invDate,
          invNum: Sch_invNum,
          invTerm: Sch_when('type', { is: 'Barcode', then: Sch_invTerm }),
          randomNumber: Sch_digits(4),
          sellerID: Sch_when('type', { is: 'QRCode', then: Sch_digits(8) }),
          type: Sch_barcode,
          version: Joi.number().required()
        })
      },
      {
        path: '/PB2CAPIVAN/loveCodeapp/qryLoveCode',
        method: Method.POST,
        needToSign: false,
        stableParam: {
          action: 'qryLoveCode',
          version: 0.2,
          UUID: '',
          appID: ''
        },
        schema: Joi.object().keys({
          UUID: Joi.string().required(),
          action: Joi.string().required(),
          appID: Joi.string().required(),
          qKey: Sch_digits(),
          version: Joi.number().required()
        })
      },
      {
        path: '/PB2CAPIVAN/invServ/InvServ',
        method: Method.POST,
        needToSign: false,
        stableParam: {
          action: 'carrierInvChk',
          version: 0.3,
          uuid: '',
          appID: ''
        },
        schema: Joi.object().keys({
          action: Joi.string().required(),
          appID: Joi.string().required(),
          cardEncrypt: Joi.string().required(),
          cardNo: Joi.string().required(),
          cardType: Sch_cardType,
          endDate: Sch_invDate,
          expTimeStamp: Joi.date().timestamp('unix').required(),
          onlyWinningInv: Sch_YN,
          startDate: Sch_invDate,
          timeStamp: Joi.date().timestamp('unix').required(),
          uuid: Joi.string().required(),
          version: Joi.number().required()
        })
      },
      {
        path: '/PB2CAPIVAN/invServ/InvServ',
        method: Method.POST,
        needToSign: false,
        stableParam: {
          action: 'carrierInvDetail',
          version: 0.3,
          uuid: '',
          appID: ''
        },
        schema: Joi.object().keys({
          action: Joi.string().required(),
          amount: Sch_digits(),
          appID: Joi.string().required(),
          cardEncrypt: Joi.string().required(),
          cardNo: Joi.string().required(),
          cardType: Sch_cardType,
          expTimeStamp: Joi.date().timestamp('unix').required(),
          invDate: Sch_invDate,
          invNum: Sch_invNum,
          sellerName: Joi.string().optional(),
          timeStamp: Joi.date().timestamp('unix').required(),
          uuid: Joi.string().required(),
          version: Joi.number().required()
        })
      },
      {
        path: '/PB2CAPIVAN/CarInv/Donate',
        method: Method.POST,
        needToSign: true,
        stableParam: {
          action: 'carrierInvDnt',
          version: 0.1,
          uuid: '',
          appID: ''
        },
        schema: Joi.object().keys({
          action: Joi.string().required(),
          appID: Joi.string().required(),
          cardEncrypt: Joi.string().required(),
          cardNo: Joi.string().required(),
          cardType: Sch_cardType,
          expTimeStamp: Joi.date().timestamp('unix').required(),
          invDate: Sch_invDate,
          invNum: Sch_invNum,
          npoBan: Sch_digits(),
          serial: Sch_digits(10),
          timeStamp: Joi.date().timestamp('unix').required(),
          uuid: Joi.string().required(),
          version: Joi.number().required()
        })
      },
      {
        path: '/PB2CAPIVAN/Carrier/Aggregate',
        method: Method.POST,
        needToSign: true,
        stableParam: {
          action: 'qryCarrierAgg',
          version: 1.0,
          uuid: '',
          appID: ''
        },
        schema: Joi.object().keys({
          action: Joi.string().required(),
          appID: Joi.string().required(),
          cardEncrypt: Joi.string().required(),
          cardNo: Joi.string().required(),
          cardType: Sch_cardType,
          serial: Sch_digits(10),
          timeStamp: Joi.date().timestamp('unix').required(),
          uuid: Joi.string().required(),
          version: Joi.number().required()
        })
      },
      {
        path: '/PB2CAPIVAN/appCarreg/AppCarReg',
        method: Method.POST,
        needToSign: true,
        stableParam: {
          action: 'generalCarrierReg',
          version: 1.0,
          uuid: '',
          appID: ''
        },
        schema: Joi.object().keys({
          action: Joi.string().required(),
          appID: Joi.string().required(),
          email: Joi.string().email().required(),
          isVerification: Sch_YN,
          phoneNo: Sch_digits(10),
          serial: Sch_digits(10),
          timeStamp: Joi.date().timestamp('unix').required(),
          uuid: Joi.string().required(),
          version: Joi.number().required()
        })
      },
      {
        path: '/PB2CAPIVAN/PublicCarrier/AppBankInfo',
        method: Method.POST,
        needToSign: true,
        stableParam: {
          action: 'generalCarrierBank',
          version: 1.0,
          uuid: '',
          appID: ''
        },
        schema: Joi.object().keys({
          accountNo: Sch_when('updateAcc', { is: 'Y', then: Sch_digits() }),
          action: Joi.string().required(),
          appID: Joi.string().required(),
          bankNo: Sch_when('updateAcc', { is: 'Y', then: Sch_digits() }),
          cardEncrypt: Joi.string().required(),
          cardNo: Joi.string().required(),
          cardType: Sch_cardType,
          enableRemit: Sch_YN,
          expTimeStamp: Joi.date().timestamp('unix').required(),
          rocID: Sch_when('updateAcc', { is: 'Y', then: Joi.string().regex(/^[A-Z]{1}[0-9]{9}$/, 'ROC ID').required() }),
          serial: Sch_digits(10),
          timeStamp: Joi.date().timestamp('unix').required(),
          updateAcc: Sch_YN,
          userIdType: Joi.string().valid(['1', '2']).required(),
          uuid: Joi.string().required(),
          version: Joi.number().required(),
          winnerName: Sch_when('updateAcc', { is: 'Y', then: Joi.string().required() }),
          winnerPhone: Sch_when('updateAcc', { is: 'Y', then: Sch_digits(10) }),
        })
      },
      {
        path: '/PB2CAPIVAN/Carrier/AppGetBarcode',
        method: Method.POST,
        needToSign: false,
        stableParam: {
          action: 'getBarcode',
          version: 1.0,
          uuid: '',
          appID: ''
        },
        schema: Joi.object().keys({
          action: Joi.string().required(),
          appID: Joi.string().required(),
          phoneNo: Sch_digits(10),
          timeStamp: Joi.date().timestamp('unix').required(),
          uuid: Joi.string().required(),
          verificationCode: Joi.string().required(),
          version: Joi.number().required()
        })
      },
      {
        path: '/PB2CAPIVAN/MobBarCar/PubCarVerReg',
        method: Method.POST,
        needToSign: true,
        stableParam: {
          action: 'pubCarVerReg',
          version: 1.0,
          uuid: '',
          appID: ''
        },
        schema: Joi.object().keys({
          action: Joi.string().required(),
          appID: Joi.string().required(),
          email: Joi.string().email().required(),
          isVerification: Sch_YN,
          phoneNo: Sch_digits(10),
          serial: Sch_digits(10),
          timeStamp: Joi.date().timestamp('unix').required(),
          uuid: Joi.string().required(),
          verify: Sch_verify,
          version: Joi.number().required()
        })
      },
      {
        path: '/PB2CAPIVAN/MobBarCar/ChangeVer',
        method: Method.POST,
        needToSign: true,
        stableParam: {
          action: 'changeVer',
          version: 1.0,
          uuid: '',
          appID: ''
        },
        schema: Joi.object().keys({
          action: Joi.string().required(),
          appID: Joi.string().required(),
          cardNo: Joi.string().required(),
          newVerify: Sch_verify,
          oldVerify: Joi.string().required(),
          serial: Sch_digits(10),
          timeStamp: Joi.date().timestamp('unix').required(),
          uuid: Joi.string().required(),
          version: Joi.number().required()
        })
      },
      {
        path: '/PB2CAPIVAN/MobBarCar/ForgetVer',
        method: Method.POST,
        needToSign: true,
        stableParam: {
          action: 'forgetVer',
          version: 1.0,
          uuid: '',
          appID: ''
        },
        schema: Joi.object().keys({
          action: Joi.string().required(),
          appID: Joi.string().required(),
          email: Joi.string().email().required(),
          phoneNo: Sch_digits(10),
          serial: Sch_digits(10),
          timeStamp: Joi.date().timestamp('unix').required(),
          uuid: Joi.string().required(),
          version: Joi.number().required()
        })
      },
      {
        path: '/PB2CAPIVAN/MobBarCar/CarrierAction',
        method: Method.POST,
        needToSign: true,
        stableParam: {
          action: 'carrierAction',
          version: 1.0,
          uuid: '',
          appID: ''
        },
        schema: Joi.object().keys({
          action: Joi.string().required(),
          appID: Joi.string().required(),
          email: Joi.string().email().required(),
          cardNo: Joi.string().required(),
          cardType: Sch_cardType,
          carrierName: Joi.string().optional(),
          publicCardNo: Joi.string().required(),
          publicCardType: Joi.string().valid(CarrierCardType.Mobile).required(),
          publicVerifyCode: Joi.string().required(),
          serial: Sch_digits(10),
          timeStamp: Joi.date().timestamp('unix').required(),
          uuid: Joi.string().required(),
          verifyCode: Joi.string().required(),
          version: Joi.number().required()
        })
      }
    ];
  }
  /**
  * Default request config for each _Business Action_.
  * Index corresponds to the order of enumeration.
  */
  export const BusinessConfigs: ConfigStruct[] = _BusinessConfigs();

  function _BusinessConfigs(): ConfigStruct[] {
    return [
      {
        endPoint: 'http://www-vc.einvoice.nat.gov.tw',
        path: '/BIZAPIVAN/biz',
        method: Method.POST,
        needToSign: false,
        stableParam: {
          action: 'bcv',
          version: 1.0,
          TxID: '',
          appId: ''
        },
        schema: Joi.object().keys({
          TxID: Joi.string().required(),
          action: Joi.string().required(),
          appID: Joi.string().required(),
          barCode: Joi.string().required(),
          version: Joi.number().required()
        })
      },
      {
        endPoint: 'http://www-vc.einvoice.nat.gov.tw',
        path: '/BIZAPIVAN/biz',
        method: Method.POST,
        needToSign: false,
        stableParam: {
          action: 'preserveCodeCheck',
          version: 1.0,
          TxID: '',
          appId: ''
        },
        schema: Joi.object().keys({
          TxID: Joi.string().required(),
          action: Joi.string().required(),
          appID: Joi.string().required(),
          pCode: Joi.string().required(),
          version: Joi.number().required()
        })
      },
      {
        endPoint: 'https://einvoice.nat.gov.tw',
        path: '/BIZAPIVAN/biz',
        method: Method.POST,
        needToSign: false,
        stableParam: {
          action: 'cardBin',
          version: 1.0,
          TxID: '',
          appId: ''
        },
        schema: Joi.object().keys({
          TxID: Joi.string().required(),
          action: Joi.string().required(),
          appID: Joi.string().required(),
          bankNo: Sch_digits(),
          version: Joi.number().required()
        })
      },
      {
        endPoint: 'https://einvoice.nat.gov.tw',
        path: '/BIZAPIVAN/biz',
        method: Method.POST,
        needToSign: false,
        stableParam: {
          action: 'creditCardBan',
          version: 1.0,
          TxID: '',
          appId: ''
        },
        schema: Joi.object().keys({
          TxID: Joi.string().required(),
          action: Joi.string().required(),
          appID: Joi.string().required(),
          version: Joi.number().required()
        })
      },
      {
        endPoint: 'http://www-vc.einvoice.nat.gov.tw',
        path: '/BIZAPIVAN/biz',
        method: Method.POST,
        needToSign: true,
        stableParam: {
          action: 'qryRecvRout',
          version: 1.0,
          TxID: '',
          appId: ''
        },
        schema: Joi.object().keys({
          TxID: Joi.string().required(),
          action: Joi.string().required(),
          appID: Joi.string().required(),
          ban: Sch_digits(8),
          serial: Sch_digits(10),
          timeStamp: Joi.date().timestamp('unix').required(),
          version: Joi.number().required()
        })
      },
      {
        endPoint: 'http://www-vc.einvoice.nat.gov.tw',
        path: '/BIZAPIVAN/biz',
        method: Method.POST,
        needToSign: true,
        stableParam: {
          action: 'qryBanUnitTp',
          version: 1.0,
          appId: ''
        },
        schema: Joi.object().keys({
          action: Joi.string().required(),
          appID: Joi.string().required(),
          ban: Sch_digits(8),
          serial: Sch_digits(10),
          timeStamp: Joi.date().timestamp('unix').required(),
          version: Joi.number().required()
        })
      }
    ];
  }
}
/**
* A module contains all utilities the API need.
*/
export namespace APIUtil {
  /**
  * Internal serial number generator Map. When `Serial` implement,the instance will register it's generator to here.
  */
  const SerialWMap: WeakMap<Serial, IterableIterator<string>> = new WeakMap();
  /**
  * Serial number generator factory.The `Serial` instance get it's generator from here.
  */
  function serialGenFactory(): IterableIterator<string> {
    return gen();

    function* gen() {
      let n = 0;
      while (true) {
        n++;
        yield n.toString().padStart(10, '0');
      }
    }
  }
  /**
  * Serial number generator class.You can get new serial number or reset it.
  */
  export class Serial {
    /**
    * constructor
    * The instance will register a serial number generator.
    */
    constructor() {
      SerialWMap.set(this, serialGenFactory());
    }
    /**
    * Return a new serial number.
    */
    next(): string | undefined {
      let serialGen = SerialWMap.get(this);
      if (serialGen) {
        return serialGen.next().value;
      }
      return;
    }
    /**
    * Register a new generator.
    */
    anew() {
      SerialWMap.set(this, serialGenFactory());
      return this;
    }

  }
}