/**
 * @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';

  Polymer({
    is: 'gr-admin-group-list',
    _legacyUndefinedCheck: true,

    properties: {
      /**
       * URL params passed from the router.
       */
      params: {
        type: Object,
        observer: '_paramsChanged',
      },

      /**
       * Offset of currently visible query results.
       */
      _offset: Number,
      _path: {
        type: String,
        readOnly: true,
        value: '/admin/groups',
      },
      _hasNewGroupName: Boolean,
      _createNewCapability: {
        type: Boolean,
        value: false,
      },
      _groups: Array,

      /**
       * Because  we request one more than the groupsPerPage, _shownGroups
       * may be one less than _groups.
       * */
      _shownGroups: {
        type: Array,
        computed: 'computeShownItems(_groups)',
      },

      _groupsPerPage: {
        type: Number,
        value: 25,
      },

      _loading: {
        type: Boolean,
        value: true,
      },
      _filter: String,
    },

    behaviors: [
      Gerrit.ListViewBehavior,
    ],

    attached() {
      this._getCreateGroupCapability();
      this.fire('title-change', {title: 'Groups'});
      this._maybeOpenCreateOverlay(this.params);
    },

    _paramsChanged(params) {
      this._loading = true;
      this._filter = this.getFilterValue(params);
      this._offset = this.getOffsetValue(params);

      return this._getGroups(this._filter, this._groupsPerPage,
          this._offset);
    },

    /**
     * Opens the create overlay if the route has a hash 'create'
     *
     * @param {!Object} params
     */
    _maybeOpenCreateOverlay(params) {
      if (params && params.openCreateModal) {
        this.$.createOverlay.open();
      }
    },

    _computeGroupUrl(id) {
      return Gerrit.Nav.getUrlForGroup(id);
    },

    _getCreateGroupCapability() {
      return this.$.restAPI.getAccount().then(account => {
        if (!account) { return; }
        return this.$.restAPI.getAccountCapabilities(['createGroup'])
            .then(capabilities => {
              if (capabilities.createGroup) {
                this._createNewCapability = true;
              }
            });
      });
    },

    _getGroups(filter, groupsPerPage, offset) {
      this._groups = [];
      return this.$.restAPI.getGroups(filter, groupsPerPage, offset)
          .then(groups => {
            if (!groups) {
              return;
            }
            this._groups = Object.keys(groups)
                .map(key => {
                  const group = groups[key];
                  group.name = key;
                  return group;
                });
            this._loading = false;
          });
    },

    _refreshGroupsList() {
      this.$.restAPI.invalidateGroupsCache();
      return this._getGroups(this._filter, this._groupsPerPage,
          this._offset);
    },

    _handleCreateGroup() {
      this.$.createNewModal.handleCreateGroup().then(() => {
        this._refreshGroupsList();
      });
    },

    _handleCloseCreate() {
      this.$.createOverlay.close();
    },

    _handleCreateClicked() {
      this.$.createOverlay.open();
    },

    _visibleToAll(item) {
      return item.options.visible_to_all === true ? 'Y' : 'N';
    },
  });
})();