import * as plugins from './letterxpress.plugins';
import { response } from 'express';

export interface ILetterXpressConstructorOptions {
  username: string;
  apiKey: string;
}

export class LetterXpressAccount {
  public baseApiUrl = 'https://api.letterxpress.de/v1';
  public options: ILetterXpressConstructorOptions;

  public letterSentObservable = new plugins.smartrx.rxjs.Subject<plugins.smartletter.Letter>();

  constructor(optionsArg: ILetterXpressConstructorOptions) {
    this.options = optionsArg;
  }

  /**
   * sends a letter
   * @param letterArg
   */
  public async sendLetter(letterArg: plugins.smartletter.Letter) {
    const letterPdfResult = await letterArg.getPdfResult();
    const response = await this.request('/setJob', 'POST', {
      letter: {
        base64_file: letterPdfResult.buffer.toString('base64'),
        base64_checksum: await plugins.smarthash.md5FromString(
          letterPdfResult.buffer.toString('base64')
        ),
        specification: {
          color: '4',
          mode: 'simplex',
          ship: letterArg.options.to.country === 'Germany' ? 'national' : 'international'
        }
      }
    });
    letterArg.setProcessingId(response.body.letter.job_id);
    return letterArg;
  }

  public async cancelLetter(letterArg: plugins.smartletter.Letter) {
    const processingId = letterArg.getProcessingId();
    return await this.cancelLetterByProcessingId(processingId);
  }

  public async cancelLetterByProcessingId(processingId: string) {
    const response = await this.request(`/deleteJob/${processingId}`, 'DELETE');
    return response;
  }

  /**
   * fires the request
   */
  private async request(routeArg: string, methodArg: 'GET' | 'POST' | 'DELETE', payload: any = {}) {
    const requestUrl = `${this.baseApiUrl}${routeArg}`;
    console.log(requestUrl);
    const requestData = {
      auth: {
        username: this.options.username,
        apikey: this.options.apiKey
      },
      ...payload
    };
    const response = await plugins.smartrequest.request(requestUrl, {
      method: methodArg,
      headers: {
        'Content-Type': 'application/json'
      },
      requestBody: JSON.stringify(requestData)
    });
    console.log(response.body);
    return response;
  }
}