// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import * as Platform from '../../core/platform/platform.js';

import type {TabbedPane} from './TabbedPane.js';
import type {ToolbarItem, ToolbarMenuButton} from './Toolbar.js';
import {ViewManager} from './ViewManager.js';
import {VBox, type Widget, type WidgetOptions} from './Widget.js';

export interface View {
  viewId(): string;

  title(): Platform.UIString.LocalizedString;

  isCloseable(): boolean;

  isPreviewFeature(): boolean;

  iconName(): string|undefined;

  isTransient(): boolean;

  toolbarItems(): Promise<ToolbarItem[]>;

  widget(): Promise<Widget>;

  disposeView(): void|Promise<void>;
}

/**
 * Settings to control the behavior of `SimpleView` subclasses.
 */
export interface SimpleViewOptions extends WidgetOptions {
  /**
   * User visible title for the view.
   */
  title: Platform.UIString.LocalizedString;

  /**
   * Internal ID used to refer to the view.
   *
   * Note that this is also used to construct VE contexts in some places.
   *
   * Must be in extended kebab case.
   */
  viewId: Lowercase<string>;
}

export class SimpleView extends VBox implements View {
  readonly #title: Platform.UIString.LocalizedString;
  readonly #viewId: Lowercase<string>;

  /**
   * Constructs a new `SimpleView` with the given `options`.
   *
   * @param options the settings for the resulting view.
   * @throws TypeError - if `options.viewId` is not in extended kebab case.
   */
  constructor(options: SimpleViewOptions) {
    super(options);
    this.#title = options.title;
    this.#viewId = options.viewId;
    if (!Platform.StringUtilities.isExtendedKebabCase(this.#viewId)) {
      throw new TypeError(`Invalid view ID '${this.#viewId}'`);
    }
  }

  viewId(): string {
    return this.#viewId;
  }

  title(): Platform.UIString.LocalizedString {
    return this.#title;
  }

  isCloseable(): boolean {
    return false;
  }

  isTransient(): boolean {
    return false;
  }

  toolbarItems(): Promise<ToolbarItem[]> {
    return Promise.resolve([]);
  }

  widget(): Promise<Widget> {
    return Promise.resolve(this);
  }

  revealView(): Promise<void> {
    return ViewManager.instance().revealView(this);
  }

  disposeView(): void {
  }

  isPreviewFeature(): boolean {
    return false;
  }

  iconName(): string|undefined {
    return undefined;
  }
}

export interface ViewLocation {
  appendApplicableItems(locationName: string): void;
  appendView(view: View, insertBefore?: View|null): void;
  showView(view: View, insertBefore?: View|null, userGesture?: boolean): Promise<void>;
  removeView(view: View): void;
  isViewVisible(view: View): boolean;
  widget(): Widget;
}

export interface TabbedViewLocation extends ViewLocation {
  tabbedPane(): TabbedPane;
  enableMoreTabsButton(): ToolbarMenuButton;
}

export interface ViewLocationResolver {
  resolveLocation(location: string): ViewLocation|null;
}