// Copyright (c) 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

/* eslint-disable rulesdir/no_underscored_properties */

import * as i18n from '../i18n/i18n.js';
import * as SDK from '../sdk/sdk.js';
import * as UI from '../ui/ui.js';

export const UIStrings = {
  /**
  *@description Screen reader description of a hit breakpoint in the Sources panel
  */
  breakpointHit: 'breakpoint hit',
};
const str_ = i18n.i18n.registerUIStrings('browser_debugger/CategorizedBreakpointsSidebarPane.ts', UIStrings);
const i18nString = i18n.i18n.getLocalizedString.bind(undefined, str_);
/**
 * @abstract
 */
export class CategorizedBreakpointsSidebarPane extends UI.Widget.VBox {
  _categoriesTreeOutline: UI.TreeOutline.TreeOutlineInShadow;
  _viewId: string;
  _detailsPausedReason: Protocol.Debugger.PausedEventReason;
  _categories: Map<string, Item>;
  _breakpoints: Map<SDK.DOMDebuggerModel.CategorizedBreakpoint, Item>;
  _highlightedElement?: HTMLLIElement;
  constructor(
      categories: string[], breakpoints: SDK.DOMDebuggerModel.CategorizedBreakpoint[], viewId: string,
      detailsPausedReason: Protocol.Debugger.PausedEventReason) {
    super(true);
    this._categoriesTreeOutline = new UI.TreeOutline.TreeOutlineInShadow();
    this._categoriesTreeOutline.registerRequiredCSS(
        'browser_debugger/categorizedBreakpointsSidebarPane.css', {enableLegacyPatching: true});
    this._categoriesTreeOutline.setShowSelectionOnKeyboardFocus(/* show */ true);
    this.contentElement.appendChild(this._categoriesTreeOutline.element);
    this._viewId = viewId;
    this._detailsPausedReason = detailsPausedReason;

    this._categories = new Map();
    for (const category of categories) {
      if (!this._categories.has(category)) {
        this._createCategory(category);
      }
    }
    if (categories.length > 0) {
      const firstCategory = this._categories.get(categories[0]);
      if (firstCategory) {
        firstCategory.element.select();
      }
    }

    this._breakpoints = new Map();
    for (const breakpoint of breakpoints) {
      this._createBreakpoint(breakpoint);
    }

    SDK.SDKModel.TargetManager.instance().addModelListener(
        SDK.DebuggerModel.DebuggerModel, SDK.DebuggerModel.Events.DebuggerPaused, this._update, this);
    SDK.SDKModel.TargetManager.instance().addModelListener(
        SDK.DebuggerModel.DebuggerModel, SDK.DebuggerModel.Events.DebuggerResumed, this._update, this);
    UI.Context.Context.instance().addFlavorChangeListener(SDK.SDKModel.Target, this._update, this);
  }

  focus(): void {
    this._categoriesTreeOutline.forceSelect();
  }

  _createCategory(name: string): void {
    const labelNode = UI.UIUtils.CheckboxLabel.create(name);
    labelNode.checkboxElement.addEventListener('click', this._categoryCheckboxClicked.bind(this, name), true);
    labelNode.checkboxElement.tabIndex = -1;

    const treeElement = new UI.TreeOutline.TreeElement(labelNode);
    treeElement.listItemElement.addEventListener('keydown', event => {
      if (event.key === ' ') {
        const category = this._categories.get(name);
        if (category) {
          category.checkbox.click();
        }
        event.consume(true);
      }
    });
    labelNode.checkboxElement.addEventListener('focus', () => treeElement.listItemElement.focus());
    UI.ARIAUtils.setChecked(treeElement.listItemElement, false);
    this._categoriesTreeOutline.appendChild(treeElement);

    this._categories.set(name, {element: treeElement, checkbox: labelNode.checkboxElement});
  }

  _createBreakpoint(breakpoint: SDK.DOMDebuggerModel.CategorizedBreakpoint): void {
    const labelNode = UI.UIUtils.CheckboxLabel.create(breakpoint.title());
    labelNode.classList.add('source-code');
    labelNode.checkboxElement.addEventListener('click', this._breakpointCheckboxClicked.bind(this, breakpoint), true);
    labelNode.checkboxElement.tabIndex = -1;

    const treeElement = new UI.TreeOutline.TreeElement(labelNode);
    treeElement.listItemElement.addEventListener('keydown', event => {
      if (event.key === ' ') {
        const breakpointToClick = this._breakpoints.get(breakpoint);
        if (breakpointToClick) {
          breakpointToClick.checkbox.click();
        }
        event.consume(true);
      }
    });
    labelNode.checkboxElement.addEventListener('focus', () => treeElement.listItemElement.focus());
    UI.ARIAUtils.setChecked(treeElement.listItemElement, false);
    treeElement.listItemElement.createChild('div', 'breakpoint-hit-marker');
    const category = this._categories.get(breakpoint.category());
    if (category) {
      category.element.appendChild(treeElement);
    }
    // Better to return that to produce a side-effect
    this._breakpoints.set(breakpoint, {element: treeElement, checkbox: labelNode.checkboxElement});
  }

  _getBreakpointFromPausedDetails(_details: SDK.DebuggerModel.DebuggerPausedDetails):
      SDK.DOMDebuggerModel.CategorizedBreakpoint|null {
    return null;
  }

  _update(): void {
    const target = UI.Context.Context.instance().flavor(SDK.SDKModel.Target);
    const debuggerModel = target ? target.model(SDK.DebuggerModel.DebuggerModel) : null;
    const details = debuggerModel ? debuggerModel.debuggerPausedDetails() : null;

    if (!details || details.reason !== this._detailsPausedReason || !details.auxData) {
      if (this._highlightedElement) {
        UI.ARIAUtils.setDescription(this._highlightedElement, '');
        this._highlightedElement.classList.remove('breakpoint-hit');
        delete this._highlightedElement;
      }
      return;
    }
    const breakpoint = this._getBreakpointFromPausedDetails(details);
    if (!breakpoint) {
      return;
    }

    UI.ViewManager.ViewManager.instance().showView(this._viewId);
    const category = this._categories.get(breakpoint.category());
    if (category) {
      category.element.expand();
    }
    const matchingBreakpoint = this._breakpoints.get(breakpoint);
    if (matchingBreakpoint) {
      this._highlightedElement = matchingBreakpoint.element.listItemElement;
      UI.ARIAUtils.setDescription(this._highlightedElement, i18nString(UIStrings.breakpointHit));
      this._highlightedElement.classList.add('breakpoint-hit');
    }
  }

  // Probably can be kept although eventListener does not call this._breakpointCheckboxClicke
  _categoryCheckboxClicked(category: string): void {
    const item = this._categories.get(category);
    if (!item) {
      return;
    }

    const enabled = item.checkbox.checked;
    UI.ARIAUtils.setChecked(item.element.listItemElement, enabled);

    for (const breakpoint of this._breakpoints.keys()) {
      if (breakpoint.category() === category) {
        const matchingBreakpoint = this._breakpoints.get(breakpoint);
        if (matchingBreakpoint) {
          matchingBreakpoint.checkbox.checked = enabled;
          this._toggleBreakpoint(breakpoint, enabled);
        }
      }
    }
  }

  _toggleBreakpoint(breakpoint: SDK.DOMDebuggerModel.CategorizedBreakpoint, enabled: boolean): void {
    breakpoint.setEnabled(enabled);
  }

  _breakpointCheckboxClicked(breakpoint: SDK.DOMDebuggerModel.CategorizedBreakpoint): void {
    const item = this._breakpoints.get(breakpoint);
    if (!item) {
      return;
    }

    this._toggleBreakpoint(breakpoint, item.checkbox.checked);
    UI.ARIAUtils.setChecked(item.element.listItemElement, item.checkbox.checked);

    // Put the rest in a separate function
    let hasEnabled = false;
    let hasDisabled = false;
    for (const other of this._breakpoints.keys()) {
      if (other.category() === breakpoint.category()) {
        if (other.enabled()) {
          hasEnabled = true;
        } else {
          hasDisabled = true;
        }
      }
    }

    const category = this._categories.get(breakpoint.category());
    if (!category) {
      return;
    }
    category.checkbox.checked = hasEnabled;
    category.checkbox.indeterminate = hasEnabled && hasDisabled;
    if (category.checkbox.indeterminate) {
      UI.ARIAUtils.setCheckboxAsIndeterminate(category.element.listItemElement);
    } else {
      UI.ARIAUtils.setChecked(category.element.listItemElement, hasEnabled);
    }
  }
}
export interface Item {
  element: UI.TreeOutline.TreeElement;
  checkbox: HTMLInputElement;
}