'use strict'

const ApiConfig = require('./apiConfig')
const HttpClient = require('./httpClient')

/**
 * These are wrapper/implementation of API methods described on: 
 * https://api-docs.midtrans.com/#midtrans-api
 * @return {Promise} - Promise that contains JSON API response decoded as Object
 */
class Transaction{
  constructor(parentObj){
    this.parent = parentObj;
  }
  status(transactionId=''){
    let apiUrl = this.parent.apiConfig.getCoreApiBaseUrl()+'/'+transactionId+'/status';
    let responsePromise = this.parent.httpClient.request(
      'get',
      this.parent.apiConfig.get().serverKey,
      apiUrl,
      null);
    return responsePromise;
  }
  statusb2b(transactionId=''){
    let apiUrl = this.parent.apiConfig.getCoreApiBaseUrl()+'/'+transactionId+'/statusb2b';
    let responsePromise = this.parent.httpClient.request(
      'get',
      this.parent.apiConfig.get().serverKey,
      apiUrl,
      null);
    return responsePromise;
  }
  approve(transactionId=''){
    let apiUrl = this.parent.apiConfig.getCoreApiBaseUrl()+'/'+transactionId+'/approve';
    let responsePromise = this.parent.httpClient.request(
      'post',
      this.parent.apiConfig.get().serverKey,
      apiUrl,
      null);
    return responsePromise;
  }
  deny(transactionId=''){
    let apiUrl = this.parent.apiConfig.getCoreApiBaseUrl()+'/'+transactionId+'/deny';
    let responsePromise = this.parent.httpClient.request(
      'post',
      this.parent.apiConfig.get().serverKey,
      apiUrl,
      null);
    return responsePromise;
  }
  cancel(transactionId=''){
    let apiUrl = this.parent.apiConfig.getCoreApiBaseUrl()+'/'+transactionId+'/cancel';
    let responsePromise = this.parent.httpClient.request(
      'post',
      this.parent.apiConfig.get().serverKey,
      apiUrl,
      null);
    return responsePromise;
  }
  expire(transactionId=''){
    let apiUrl = this.parent.apiConfig.getCoreApiBaseUrl()+'/'+transactionId+'/expire';
    let responsePromise = this.parent.httpClient.request(
      'post',
      this.parent.apiConfig.get().serverKey,
      apiUrl,
      null);
    return responsePromise;
  }
  refund(transactionId='',parameter={}){
    let apiUrl = this.parent.apiConfig.getCoreApiBaseUrl()+'/'+transactionId+'/refund';
    let responsePromise = this.parent.httpClient.request(
      'post',
      this.parent.apiConfig.get().serverKey,
      apiUrl,
      parameter);
    return responsePromise;
  }
  notification(notificationObj={}){
    let self = this;
    return new Promise(function(resolve,reject){
      if(typeof notificationObj === 'string' || notificationObj instanceof String){
        try{
          notificationObj = JSON.parse(notificationObj);
        }catch(err){
          reject(new MidtransNotificationError('fail to parse `notification` string as JSON. Use JSON string or Object as `notification`. with message:'+err.message));
        }
      }
      let transactionId = notificationObj.transaction_id;
      self.status(transactionId)
        .then(function(res){
          resolve(res);
        })
        .catch(function(err){
          reject(err)
        });
    });
  };
}

class MidtransNotificationError extends Error{}

module.exports = Transaction;