/**
 * @license
 * Copyright (C) 2016 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 '../../../scripts/bundled-polymer.js';

import '@polymer/iron-input/iron-input.js';
import '../../shared/gr-button/gr-button.js';
import '../../shared/gr-date-formatter/gr-date-formatter.js';
import '../../shared/gr-rest-api-interface/gr-rest-api-interface.js';
import '../../../styles/shared-styles.js';
import '../../../styles/gr-form-styles.js';
import {dom} from '@polymer/polymer/lib/legacy/polymer.dom.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-menu-editor_html.js';

/** @extends Polymer.Element */
class GrMenuEditor extends GestureEventListeners(
    LegacyElementMixin(
        PolymerElement)) {
  static get template() { return htmlTemplate; }

  static get is() { return 'gr-menu-editor'; }

  static get properties() {
    return {
      menuItems: Array,
      _newName: String,
      _newUrl: String,
    };
  }

  _handleMoveUpButton(e) {
    const index = Number(dom(e).localTarget.dataset.index);
    if (index === 0) { return; }
    const row = this.menuItems[index];
    const prev = this.menuItems[index - 1];
    this.splice('menuItems', index - 1, 2, row, prev);
  }

  _handleMoveDownButton(e) {
    const index = Number(dom(e).localTarget.dataset.index);
    if (index === this.menuItems.length - 1) { return; }
    const row = this.menuItems[index];
    const next = this.menuItems[index + 1];
    this.splice('menuItems', index, 2, next, row);
  }

  _handleDeleteButton(e) {
    const index = Number(dom(e).localTarget.dataset.index);
    this.splice('menuItems', index, 1);
  }

  _handleAddButton() {
    if (this._computeAddDisabled(this._newName, this._newUrl)) { return; }

    this.splice('menuItems', this.menuItems.length, 0, {
      name: this._newName,
      url: this._newUrl,
      target: '_blank',
    });

    this._newName = '';
    this._newUrl = '';
  }

  _computeAddDisabled(newName, newUrl) {
    return !newName.length || !newUrl.length;
  }

  _handleInputKeydown(e) {
    if (e.keyCode === 13) {
      e.stopPropagation();
      this._handleAddButton();
    }
  }
}

customElements.define(GrMenuEditor.is, GrMenuEditor);