/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

// This file is loaded into the browser window scope.
/* eslint-env mozilla/browser-window */

ChromeUtils.defineModuleGetter(this, "TabsPanel",
                               "resource:///modules/TabsList.jsm");

var gTabsPanel = {
  kElements: {
    allTabsButton: "alltabs-button",
    allTabsView: "allTabsMenu-allTabsView",
    allTabsViewTabs: "allTabsMenu-allTabsViewTabs",
    containerTabsView: "allTabsMenu-containerTabsView",
    hiddenTabsButton: "allTabsMenu-hiddenTabsButton",
    hiddenTabsView: "allTabsMenu-hiddenTabsView",
  },
  _initialized: false,
  _initializedElements: false,

  initElements() {
    if (this._initializedElements) return;

    for (let [name, id] of Object.entries(this.kElements)) {
      this[name] = document.getElementById(id);
    }
    this._initializedElements = true;
  },

  init() {
    if (this._initialized) return;

    this.initElements();

    this.hiddenAudioTabsPopup = new TabsPanel({
      view: this.allTabsView,
      insertBefore: document.getElementById("allTabsMenu-tabsSeparator"),
      filterFn: (tab) => tab.hidden && tab.soundPlaying,
    });
    this.allTabsPanel = new TabsPanel({
      view: this.allTabsView,
      containerNode: this.allTabsViewTabs,
      filterFn: (tab) => !tab.pinned && !tab.hidden,
    });

    this.allTabsView.addEventListener("ViewShowing", (e) => {
      PanelUI._ensureShortcutsShown(this.allTabsView);
      e.target.querySelector(".undo-close-tab").disabled =
          SessionStore.getClosedTabCount(window) == 0;

      let containersEnabled = Services.prefs.getBoolPref("privacy.userContext.enabled")
                                && !PrivateBrowsingUtils.isWindowPrivate(window);
      document.getElementById("allTabsMenu-containerTabsButton")
        .hidden = !containersEnabled;
      document.getElementById("allTabsMenu-containerTabsSeparator")
        .hidden = !containersEnabled;

      let hasHiddenTabs = gBrowser.visibleTabs.length < gBrowser.tabs.length;
      document.getElementById("allTabsMenu-hiddenTabsButton")
        .hidden = !hasHiddenTabs;
      document.getElementById("allTabsMenu-hiddenTabsSeparator")
        .hidden = !hasHiddenTabs;
    });

    this.allTabsView.addEventListener("ViewShown", (e) => {
      let selectedRow = this.allTabsView.querySelector(".all-tabs-item[selected]");
      selectedRow.scrollIntoView({block: "center"});
    });

    let containerTabsMenuSeparator = this.containerTabsView.querySelector("toolbarseparator");
    this.containerTabsView.addEventListener("ViewShowing", (e) => {
      let elements = [];
      let frag = document.createDocumentFragment();

      ContextualIdentityService.getPublicIdentities().forEach(identity => {
        let menuitem = document.createXULElement("toolbarbutton");
        menuitem.setAttribute("class", "subviewbutton subviewbutton-iconic");
        menuitem.setAttribute("label", ContextualIdentityService.getUserContextLabel(identity.userContextId));
        // The styles depend on this.
        menuitem.setAttribute("usercontextid", identity.userContextId);
        // The command handler depends on this.
        menuitem.setAttribute("data-usercontextid", identity.userContextId);
        menuitem.setAttribute("data-identity-color", identity.color);
        menuitem.setAttribute("data-identity-icon", identity.icon);

        menuitem.setAttribute("command", "Browser:NewUserContextTab");

        frag.appendChild(menuitem);
        elements.push(menuitem);
      });

      e.target.addEventListener("ViewHiding", () => {
        for (let element of elements) {
          element.remove();
        }
      }, {once: true});
      containerTabsMenuSeparator.parentNode.insertBefore(frag, containerTabsMenuSeparator);
    });

    this.hiddenTabsPopup = new TabsPanel({
      view: this.hiddenTabsView,
      filterFn: (tab) => tab.hidden,
    });

    this._initialized = true;
  },

  get canOpen() {
    this.initElements();
    return isElementVisible(this.allTabsButton);
  },

  showAllTabsPanel() {
    this.init();
    if (this.canOpen) {
      PanelUI.showSubView(this.kElements.allTabsView, this.allTabsButton);
    }
  },

  hideAllTabsPanel() {
    this.init();
    PanelMultiView.hidePopup(this.allTabsView.closest("panel"));
  },

  showHiddenTabsPanel() {
    this.init();
    if (!this.canOpen) {
      return;
    }
    this.allTabsView.addEventListener("ViewShown", (e) => {
      PanelUI.showSubView(this.kElements.hiddenTabsView, this.hiddenTabsButton);
    }, {once: true});
    this.showAllTabsPanel();
  },
};