/* 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/. */

const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
  PrivateBrowsingUtils: "resource://gre/modules/PrivateBrowsingUtils.sys.mjs",
});

const ABOUT_SHOPPING_SIDEBAR = "about:shoppingsidebar";

/**
 * When a Review Checker sidebar panel is open ReviewCheckerParent
 * handles listening for location changes and determining if the
 * location or the current URI is a product or not.
 *
 * The ReviewCheckerChild will use that info to update the sidebar UI.
 *
 * This is a simplified version of the `ShoppingSidebarParent` for
 * using the shopping components in the main sidebar instead of the
 * custom shopping sidebar.
 */
export class ReviewCheckerParent extends JSWindowActorParent {
  static SHOPPING_OPTED_IN_PREF = "browser.shopping.experience2023.optedIn";
  static CLOSE_SIDEBAR = "CloseReviewCheckerSidebar";

  actorCreated() {
    this.topBrowserWindow = this.browsingContext.topChromeWindow;
    this.topBrowserWindow.gBrowser.addProgressListener(this);
  }

  didDestroy() {
    if (!this.topBrowserWindow) {
      return;
    }

    this.topBrowserWindow.gBrowser.removeProgressListener(this);

    this.topBrowserWindow = undefined;
  }

  updateCurrentURL(uri, flags) {
    // about:shoppingsidebar is only used for testing with fake data.
    if (!uri || uri.spec == ABOUT_SHOPPING_SIDEBAR) {
      return;
    }
    this.sendAsyncMessage("ReviewChecker:UpdateCurrentURL", {
      url: uri.spec,
      isReload: !!(flags & Ci.nsIWebProgressListener.LOCATION_CHANGE_RELOAD),
    });
  }

  getCurrentURL() {
    let { selectedBrowser } = this.topBrowserWindow.gBrowser;
    let uri = selectedBrowser.currentURI;
    // about:shoppingsidebar is only used for testing with fake data.
    if (!uri || uri.spec == ABOUT_SHOPPING_SIDEBAR) {
      return null;
    }
    return uri.spec;
  }

  async receiveMessage(message) {
    if (this.browsingContext.usePrivateBrowsing) {
      throw new Error("We should never be invoked in PBM.");
    }
    switch (message.name) {
      case "GetCurrentURL":
        return this.getCurrentURL();
      case "DisableShopping":
        Services.prefs.setIntPref(
          ReviewCheckerParent.SHOPPING_OPTED_IN_PREF,
          2
        );
        break;
      case "CloseShoppingSidebar":
        this.closeSidebarPanel();
        break;
    }
    return null;
  }

  /**
   * Called by TabsProgressListener whenever any browser navigates from one
   * URL to another.
   * Note that this includes hash changes / pushState navigations, because
   * those can be significant for us.
   */
  onLocationChange(aWebProgress, _aRequest, aLocationURI, aFlags) {
    if (aWebProgress && !aWebProgress.isTopLevel) {
      return;
    }

    let isPBM = lazy.PrivateBrowsingUtils.isWindowPrivate(
      this.topBrowserWindow
    );
    if (isPBM) {
      return;
    }

    this.updateCurrentURL(aLocationURI, aFlags);
  }

  closeSidebarPanel() {
    let closeEvent = new CustomEvent(ReviewCheckerParent.CLOSE_SIDEBAR, {
      bubbles: true,
      composed: true,
    });
    this.topBrowserWindow.dispatchEvent(closeEvent);
  }
}