/**
 * @license
 * Copyright (C) 2018 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.
 */
import '@polymer/iron-input/iron-input.js';
import '../../../styles/shared-styles.js';
import '../../shared/gr-button/gr-button.js';
import '../../shared/gr-rest-api-interface/gr-rest-api-interface.js';
import {GestureEventListeners} from '@polymer/polymer/lib/mixins/gesture-event-listeners.js';
import {LegacyElementMixin} from '@polymer/polymer/lib/legacy/legacy-element-mixin.js';
import {PolymerElement} from '@polymer/polymer/polymer-element.js';
import {htmlTemplate} from './gr-included-in-dialog_html.js';

/**
 * @extends PolymerElement
 */
class GrIncludedInDialog extends GestureEventListeners(
    LegacyElementMixin(PolymerElement)) {
  static get template() { return htmlTemplate; }

  static get is() { return 'gr-included-in-dialog'; }
  /**
   * Fired when the user presses the close button.
   *
   * @event close
   */

  static get properties() {
    return {
    /** @type {?} */
      changeNum: {
        type: Object,
        observer: '_resetData',
      },
      /** @type {?} */
      _includedIn: Object,
      _loaded: {
        type: Boolean,
        value: false,
      },
      _filterText: {
        type: String,
        value: '',
      },
    };
  }

  loadData() {
    if (!this.changeNum) { return; }
    this._filterText = '';
    return this.$.restAPI.getChangeIncludedIn(this.changeNum).then(
        configs => {
          if (!configs) { return; }
          this._includedIn = configs;
          this._loaded = true;
        });
  }

  _resetData() {
    this._includedIn = null;
    this._loaded = false;
  }

  _computeGroups(includedIn, filterText) {
    if (!includedIn) { return []; }

    const filter = item => !filterText.length ||
        item.toLowerCase().indexOf(filterText.toLowerCase()) !== -1;

    const groups = [
      {title: 'Branches', items: includedIn.branches.filter(filter)},
      {title: 'Tags', items: includedIn.tags.filter(filter)},
    ];
    if (includedIn.external) {
      for (const externalKey of Object.keys(includedIn.external)) {
        groups.push({
          title: externalKey,
          items: includedIn.external[externalKey].filter(filter),
        });
      }
    }
    return groups.filter(g => g.items.length);
  }

  _handleCloseTap(e) {
    e.preventDefault();
    e.stopPropagation();
    this.dispatchEvent(new CustomEvent('close', {
      composed: true, bubbles: false,
    }));
  }

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

  _onFilterChanged() {
    this.debounce('filter-change', () => {
      this._filterText = this.$.filterInput.bindValue;
    }, 100);
  }
}

customElements.define(GrIncludedInDialog.is, GrIncludedInDialog);