import {
  Injectable,
  Inject,
  Scope,
} from '@nestjs/common';
import requestPromise = require('request-promise');
import { KeycloakConnectOptions } from './interface/keycloak-connect-options.interface';
import { KEYCLOAK_CONNECT_OPTIONS, KEYCLOAK_INSTANCE } from './constants';
import { KeycloakedRequest } from './keycloaked-request';
import { REQUEST } from '@nestjs/core';
import { Keycloak } from 'keycloak-connect';
import * as https from "https";

@Injectable({ scope: Scope.REQUEST })
export class KeycloakService {
  constructor(
    @Inject(KEYCLOAK_INSTANCE) private keycloak: Keycloak,
    @Inject(KEYCLOAK_CONNECT_OPTIONS) private options: KeycloakConnectOptions,
    @Inject(REQUEST) private request: KeycloakedRequest<Request>
  ) {}
  async login(
    username: string,
    password: string,
    scope = 'openid profile ',
  ): Promise<unknown> {
    const res = await requestPromise.post(
      `${this.options.authServerUrl}/realms/${this.options.realm}/protocol/openid-connect/token`,
      {
        form: {
          grant_type: 'password',
          "client_id": this.options.clientId,
          "client_secret": this.options.secret,
          scope: scope,
          username: username,
          password: password,
        },
        headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
        strictSSL: false,
      },
    );

    if (typeof res === 'string' && res.indexOf('access_token') !== -1) {
      this.request.grant = await this.keycloak.grantManager.createGrant({
        "access_token": JSON.parse(res).access_token
      }) as any;
      return this.request.grant;
    }

    return false;
  }
}