/**
 * @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 '../../../styles/shared-styles.js';
import '../gr-autocomplete/gr-autocomplete.js';
import '../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-account-entry_html.js';

/**
 * gr-account-entry is an element for entering account
 * and/or group with autocomplete support.
 *
 * @extends PolymerElement
 */
class GrAccountEntry extends GestureEventListeners(
    LegacyElementMixin(
        PolymerElement)) {
  static get template() { return htmlTemplate; }

  static get is() { return 'gr-account-entry'; }
  /**
   * Fired when an account is entered.
   *
   * @event add
   */

  /**
   * When allowAnyInput is true, account-text-changed is fired when input text
   * changed. This is needed so that the reply dialog's save button can be
   * enabled for arbitrary cc's, which don't need a 'commit'.
   *
   * @event account-text-changed
   */

  static get properties() {
    return {
      allowAnyInput: Boolean,
      borderless: Boolean,
      placeholder: String,

      // suggestFrom = 0 to enable default suggestions.
      suggestFrom: {
        type: Number,
        value: 0,
      },

      /** @type {!function(string): !Promise<Array<{name, value}>>} */
      querySuggestions: {
        type: Function,
        notify: true,
        value() {
          return input => Promise.resolve([]);
        },
      },

      _config: Object,
      /** The value of the autocomplete entry. */
      _inputText: {
        type: String,
        observer: '_inputTextChanged',
      },

    };
  }

  get focusStart() {
    return this.$.input.focusStart;
  }

  focus() {
    this.$.input.focus();
  }

  clear() {
    this.$.input.clear();
  }

  setText(text) {
    this.$.input.setText(text);
  }

  getText() {
    return this.$.input.text;
  }

  _handleInputCommit(e) {
    this.dispatchEvent(new CustomEvent('add', {
      detail: {value: e.detail.value},
      composed: true, bubbles: true,
    }));
    this.$.input.focus();
  }

  _inputTextChanged(text) {
    if (text.length && this.allowAnyInput) {
      this.dispatchEvent(new CustomEvent(
          'account-text-changed', {bubbles: true, composed: true}));
    }
  }
}

customElements.define(GrAccountEntry.is, GrAccountEntry);