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

import type * as SDK from '../../core/sdk/sdk.js';
import {PanelUtils} from '../utils/utils.js';

import type {StylePropertiesSection} from './StylePropertiesSection.js';
import {StylePropertyTreeElement} from './StylePropertyTreeElement.js';
import type {StylesSidebarPane} from './StylesSidebarPane.js';

export class StylePropertyHighlighter {
  private readonly styleSidebarPane: StylesSidebarPane;
  constructor(ssp: StylesSidebarPane) {
    this.styleSidebarPane = ssp;
  }

  /**
   * Expand all shorthands, find the given property, scroll to it and highlight it.
   */
  async highlightProperty(cssProperty: SDK.CSSProperty.CSSProperty): Promise<void> {
    const section =
        this.styleSidebarPane.allSections().find(section => section.style().allProperties().includes(cssProperty));
    if (!section) {
      return;
    }
    section.showAllItems();
    const populatePromises: Array<Promise<void>> = [];
    for (let treeElement = section.propertiesTreeOutline.firstChild(); treeElement;
         treeElement = treeElement.nextSibling) {
      populatePromises.push(treeElement.onpopulate());
    }
    await Promise.all(populatePromises);

    const treeElement = this.findTreeElementFromSection(treeElement => treeElement.property === cssProperty, section);
    if (treeElement) {
      treeElement.parent?.expand();
      this.scrollAndHighlightTreeElement(treeElement);
      section.element.focus();
    }
  }

  findAndHighlightSectionBlock(sectionBlockName: string): void {
    const block = this.styleSidebarPane.getSectionBlockByName(sectionBlockName);
    if (!block || block.sections.length === 0) {
      return;
    }
    const [section] = block.sections;
    section.showAllItems();
    PanelUtils.highlightElement(block.titleElement() as HTMLElement);
  }

  findAndHighlightSection(sectionName: string, blockName: string): void {
    const block = this.styleSidebarPane.getSectionBlockByName(blockName);
    const section = block?.sections.find(section => section.headerText() === sectionName);
    if (!section || !block) {
      return;
    }
    block.expand(true);
    section.showAllItems();
    PanelUtils.highlightElement(section.element);
  }

  /**
   * Find the first non-overridden property that matches the provided name, scroll to it and highlight it.
   */
  findAndHighlightPropertyName(propertyName: string, sectionName?: string, blockName?: string): boolean {
    const block = blockName ? this.styleSidebarPane.getSectionBlockByName(blockName) : undefined;
    const sections = block?.sections ?? this.styleSidebarPane.allSections();
    if (!sections) {
      return false;
    }
    for (const section of sections) {
      if (sectionName && section.headerText() !== sectionName) {
        continue;
      }
      if (!section.style().hasActiveProperty(propertyName)) {
        continue;
      }
      block?.expand(true);
      section.showAllItems();
      const treeElement = this.findTreeElementFromSection(
          treeElement => treeElement.property.name === propertyName && !treeElement.overloaded(), section);
      if (treeElement) {
        this.scrollAndHighlightTreeElement(treeElement);
        section.element.focus();
        return true;
      }
    }
    return false;
  }

  private findTreeElementFromSection(
      compareCb: (arg0: StylePropertyTreeElement) => boolean, section: StylePropertiesSection): StylePropertyTreeElement
      |null {
    let treeElement = section.propertiesTreeOutline.firstChild();
    while (treeElement && (treeElement instanceof StylePropertyTreeElement)) {
      if (compareCb(treeElement)) {
        return treeElement;
      }
      treeElement = treeElement.traverseNextTreeElement(false, null, true);
    }
    return null;
  }

  private scrollAndHighlightTreeElement(treeElement: StylePropertyTreeElement): void {
    PanelUtils.highlightElement(treeElement.listItemElement);
  }
}