/*
 * Copyright 2014 Mirantis, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License. You may obtain
 * a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
**/
import $ from 'jquery';
import _ from 'underscore';
import Cookies from 'js-cookie';

class KeystoneClient {
  constructor(url, options) {
    this.DEFAULT_PASSWORD = 'admin';
    _.extend(this, {
      url: url,
      cacheTokenFor: 10 * 60 * 1000
    }, options);
  }

  authenticate(username, password, options = {}) {
    if (this.tokenUpdateRequest) return this.tokenUpdateRequest;

    if (
      !options.force &&
      this.tokenUpdateTime &&
      (this.cacheTokenFor > (new Date() - this.tokenUpdateTime))
    ) {
      return $.Deferred().resolve();
    }
    var data = {auth: {}};
    if (username && password) {
      data.auth.passwordCredentials = {
        username: username,
        password: password
      };
    } else if (this.token) {
      data.auth.token = {id: this.token};
    } else {
      return $.Deferred().reject();
    }
    if (this.tenant) {
      data.auth.tenantName = this.tenant;
    }
    this.tokenUpdateRequest = $.ajax(this.url + '/v2.0/tokens', {
      type: 'POST',
      dataType: 'json',
      contentType: 'application/json',
      data: JSON.stringify(data)
    }).then((result, state, deferred) => {
      try {
        this.userId = result.access.user.id;
        this.token = result.access.token.id;
        this.tokenUpdateTime = new Date();

        Cookies.set('token', result.access.token.id);

        return deferred;
      } catch (e) {
        return $.Deferred().reject();
      }
    })
    .fail(() => delete this.tokenUpdateTime)
    .always(() => delete this.tokenUpdateRequest);

    return this.tokenUpdateRequest;
  }

  changePassword(currentPassword, newPassword) {
    var data = {
      user: {
        password: newPassword,
        original_password: currentPassword
      }
    };
    return $.ajax(this.url + '/v2.0/OS-KSCRUD/users/' + this.userId, {
      type: 'PATCH',
      dataType: 'json',
      contentType: 'application/json',
      data: JSON.stringify(data),
      headers: {'X-Auth-Token': this.token}
    }).then((result, state, deferred) => {
      try {
        this.token = result.access.token.id;
        this.tokenUpdateTime = new Date();

        Cookies.set('token', result.access.token.id);

        return deferred;
      } catch (e) {
        return $.Deferred().reject();
      }
    });
  }

  deauthenticate() {
    var token = this.token;

    if (this.tokenUpdateRequest) return this.tokenUpdateRequest;
    if (!token) return $.Deferred().reject();

    delete this.userId;
    delete this.token;
    delete this.tokenUpdateTime;

    Cookies.remove('token');

    this.tokenRemoveRequest = $.ajax(this.url + '/v2.0/tokens/' + token, {
      type: 'DELETE',
      dataType: 'json',
      contentType: 'application/json',
      headers: {'X-Auth-Token': token}
    })
    .always(() => delete this.tokenRemoveRequest);

    return this.tokenRemoveRequest;
  }
}

export default KeystoneClient;