/**
 * @license
 * Copyright (C) 2017 The Android Open Source Project
 *
 * 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.
 */
(function() {
  'use strict';

  const GC_MESSAGE = 'Garbage collection completed successfully.';

  const CONFIG_BRANCH = 'refs/meta/config';
  const CONFIG_PATH = 'project.config';
  const EDIT_CONFIG_SUBJECT = 'Edit Repo Config';
  const INITIAL_PATCHSET = 1;
  const CREATE_CHANGE_FAILED_MESSAGE = 'Failed to create change.';
  const CREATE_CHANGE_SUCCEEDED_MESSAGE = 'Navigating to change';

  Polymer({
    is: 'gr-repo-commands',

    properties: {
      params: Object,
      repo: String,
      _loading: {
        type: Boolean,
        value: true,
      },
      /** @type {?} */
      _repoConfig: Object,
      _canCreate: Boolean,
    },

    attached() {
      this._loadRepo();

      this.fire('title-change', {title: 'Repo Commands'});
    },

    _loadRepo() {
      if (!this.repo) { return Promise.resolve(); }

      const errFn = response => {
        this.fire('page-error', {response});
      };

      return this.$.restAPI.getProjectConfig(this.repo, errFn)
          .then(config => {
            if (!config) { return Promise.resolve(); }

            this._repoConfig = config;
            this._loading = false;
          });
    },

    _computeLoadingClass(loading) {
      return loading ? 'loading' : '';
    },

    _isLoading() {
      return this._loading || this._loading === undefined;
    },

    _handleRunningGC() {
      return this.$.restAPI.runRepoGC(this.repo).then(response => {
        if (response.status === 200) {
          this.dispatchEvent(new CustomEvent('show-alert',
              {detail: {message: GC_MESSAGE}, bubbles: true}));
        }
      });
    },

    _createNewChange() {
      this.$.createChangeOverlay.open();
    },

    _handleCreateChange() {
      this.$.createNewChangeModal.handleCreateChange();
      this._handleCloseCreateChange();
    },

    _handleCloseCreateChange() {
      this.$.createChangeOverlay.close();
    },

    _handleEditRepoConfig() {
      return this.$.restAPI.createChange(this.repo, CONFIG_BRANCH,
          EDIT_CONFIG_SUBJECT, undefined, false, true).then(change => {
            const message = change ?
                CREATE_CHANGE_SUCCEEDED_MESSAGE :
                CREATE_CHANGE_FAILED_MESSAGE;
            this.dispatchEvent(new CustomEvent('show-alert',
                {detail: {message}, bubbles: true}));
            if (!change) { return; }

            Gerrit.Nav.navigateToRelativeUrl(Gerrit.Nav.getEditUrlForDiff(
                change, CONFIG_PATH, INITIAL_PATCHSET));
          });
    },
  });
})();