/**
 * @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 '../gr-autocomplete/gr-autocomplete';
import {
  AutocompleteQuery,
  GrAutocomplete,
} from '../gr-autocomplete/gr-autocomplete';
import {sharedStyles} from '../../../styles/shared-styles';
import {LitElement, PropertyValues, html, css} from 'lit';
import {customElement, property, query, state} from 'lit/decorators';
import {BindValueChangeEvent} from '../../../types/events';
import {SuggestedReviewerInfo} from '../../../types/common';

/**
 * gr-account-entry is an element for entering account
 * and/or group with autocomplete support.
 */
@customElement('gr-account-entry')
export class GrAccountEntry extends LitElement {
  @query('#input') private input?: GrAutocomplete;

  /**
   * 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
   */

  @property({type: Boolean})
  allowAnyInput = false;

  @property({type: Boolean})
  borderless = false;

  @property({type: String})
  placeholder = '';

  @property({type: Object})
  querySuggestions: AutocompleteQuery<SuggestedReviewerInfo> = () =>
    Promise.resolve([]);

  @state() private inputText = '';

  static override get styles() {
    return [
      sharedStyles,
      css`
        gr-autocomplete {
          display: inline-block;
          flex: 1;
          overflow: hidden;
        }
      `,
    ];
  }

  override render() {
    return html`
      <gr-autocomplete
        id="input"
        .borderless=${this.borderless}
        .placeholder=${this.placeholder}
        .query=${this.querySuggestions}
        allow-non-suggested-values=${this.allowAnyInput}
        @commit=${this.handleInputCommit}
        clear-on-commit
        warn-uncommitted
        .text=${this.inputText}
        .verticalOffset=${24}
        @text-changed=${this.handleTextChanged}
      >
      </gr-autocomplete>
    `;
  }

  override willUpdate(changedProperties: PropertyValues) {
    if (changedProperties.has('inputText')) {
      this.inputTextChanged();
    }
  }

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

  override focus() {
    this.input!.focus();
  }

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

  setText(text: string) {
    this.input!.setText(text);
  }

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

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

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

  private handleTextChanged(e: BindValueChangeEvent) {
    this.inputText = e.detail.value;
  }
}

declare global {
  interface HTMLElementTagNameMap {
    'gr-account-entry': GrAccountEntry;
  }
}