import axios from "axios";
import { URLSearchParams } from "url";
import { setAuthToken } from "../config";
import { MyGlobal as app } from "../globals";

export class DelhiveryAuthentication {
  constructor() { }
  async authenticate() {
    try {
      const params = this.getFormParamsForAuth();
      const authenticationResponse = await axios.post(`${app.auth_url}`, params);
      const authenticationToken = {
        bearerToken: `Bearer ${authenticationResponse?.data.access_token}`,
        tokenExpiry: authenticationResponse?.data.expires_in,
        idToken: authenticationResponse?.data.id_token
      }
      setAuthToken(authenticationToken);
      return authenticationToken;
    }
    catch (e) {
      throw e;
    }
  }

  // TODO: get this from cloudService.
  private getFormParamsForAuth() {
    if (!app.userName || !app.password || !app.clientId || !app.clientSecrect) {
      throw new Error("Couldn't find the Delhivery Authentication credentials")
    }
    const formParams = new URLSearchParams();
    formParams.append('grant_type', 'password');
    formParams.append('username', app.userName);
    formParams.append('password', app.password);
    formParams.append('audience', 'StarFleet');
    formParams.append('scope', 'starfleet openid profile email ^/package/batchGeneratePackages:POST$ ^/package/batchGeneratePackages/.+:GET$ ^/package/auth-track/.+:GET$ ^/package/.+/invoice:GET$ ^/package/.+/shipping-label:GET$ ^/package/.+/upload-kyc-doc:POST$');
    formParams.append('client_id', app.clientId);
    formParams.append('client_secret', app.clientSecrect);
    return formParams;
  }
}