import * as _ from 'lodash';
import request from 'reqwest';
import when from 'when';

import { AUTH_URL } from '../constants/KeystoneApiConstants';

class KeystoneApiService {
  defaultRequest(additionalAttributes) {
    return _.merge(
      {
        url: AUTH_URL,
        method: 'POST',
        crossOrigin: true,
        contentType: 'application/json',
        type: 'json'
      },
      additionalAttributes
    );
  }

  authenticateUser(username, password) {
    let req = request(
      this.defaultRequest({
        data: JSON.stringify({
          auth: {
            identity: {
              methods: ['password'],
              password: {
                user: {
                  name: username,
                  domain: {
                    name: 'Default'
                  },
                  password: password
                }
              }
            },
            scope: {
              project: {
                name: 'admin',
                domain: {
                  name: 'Default'
                }
              }
            }
          }
        })
      })
    );

    // We're passing the req object to the next handler in the chain so that we
    // can inspect response headers later.
    return when(req, response => {
      return {
        request: req.request,
        response
      };
    });
  }

  authenticateUserViaToken(keystoneAuthTokenId) {
    let req = request(
      this.defaultRequest({
        data: JSON.stringify({
          auth: {
            identity: {
              methods: ['token'],
              token: {
                id: keystoneAuthTokenId
              }
            },
            scope: {
              project: {
                name: 'admin',
                domain: {
                  name: 'Default'
                }
              }
            }
          }
        })
      })
    );

    // We're passing the req object to the next handler in the chain so that we
    // can inspect response headers later.
    return when(req, response => {
      return {
        request: req.request,
        response
      };
    });
  }
}

export default new KeystoneApiService();
