/* 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/. */

"use strict";

class PictureInPictureVideoWrapper {
  setCaptionContainerObserver(video, updateCaptionsFunction) {
    let container = document.querySelector(".powa");

    if (container) {
      updateCaptionsFunction("");
      const callback = function(mutationsList, observer) {
        let subtitleElement = container.querySelector(".powa-sub-torpedo");
        if (!subtitleElement?.innerText) {
          updateCaptionsFunction("");
          return;
        }
        let subtitleElementClone = subtitleElement.cloneNode(true);
        let breaks = subtitleElementClone.getElementsByTagName("br");
        for (const element of breaks) {
          element.replaceWith("\n");
        }
        let text = subtitleElementClone.innerText;

        updateCaptionsFunction(text);
      };

      callback([1], null);

      let captionsObserver = new MutationObserver(callback);

      captionsObserver.observe(container, {
        attributes: false,
        childList: true,
        subtree: true,
      });
    }
  }
}

this.PictureInPictureVideoWrapper = PictureInPictureVideoWrapper;