/* SPDX-License-Identifier: AGPL-3.0-or-later */

import "../../../node_modules/swiped-events/src/swiped-events.js";

((w, d, searxng) => {
  if (searxng.endpoint !== "results") {
    return;
  }

  searxng.ready(() => {
    d.querySelectorAll("#urls img").forEach((img) =>
      img.addEventListener(
        "error",
        () => {
          // console.log("ERROR can't load: " + img.src);
          img.src = window.searxng.settings.theme_static_path + "/img/img_load_error.svg";
        },
        { once: true }
      )
    );

    if (d.querySelector("#search_url button#copy_url")) {
      d.querySelector("#search_url button#copy_url").style.display = "block";
    }

    searxng.on(".btn-collapse", "click", function () {
      var btnLabelCollapsed = this.getAttribute("data-btn-text-collapsed");
      var btnLabelNotCollapsed = this.getAttribute("data-btn-text-not-collapsed");
      var target = this.getAttribute("data-target");
      var targetElement = d.querySelector(target);
      var html = this.innerHTML;
      if (this.classList.contains("collapsed")) {
        html = html.replace(btnLabelCollapsed, btnLabelNotCollapsed);
      } else {
        html = html.replace(btnLabelNotCollapsed, btnLabelCollapsed);
      }
      this.innerHTML = html;
      this.classList.toggle("collapsed");
      targetElement.classList.toggle("invisible");
    });

    searxng.on(".media-loader", "click", function () {
      var target = this.getAttribute("data-target");
      var iframe_load = d.querySelector(target + " > iframe");
      var srctest = iframe_load.getAttribute("src");
      if (srctest === null || srctest === undefined || srctest === false) {
        iframe_load.setAttribute("src", iframe_load.getAttribute("data-src"));
      }
    });

    searxng.on("#copy_url", "click", function () {
      var target = this.parentElement.querySelector("pre");
      navigator.clipboard.writeText(target.innerText);
      this.innerText = this.dataset.copiedText;
    });

    // searxng.selectImage (gallery)
    // -----------------------------

    // setTimeout() ID, needed to cancel *last* loadImage
    let imgTimeoutID;

    // progress spinner, while an image is loading
    const imgLoaderSpinner = d.createElement("div");
    imgLoaderSpinner.classList.add("loader");

    // singleton image object, which is used for all loading processes of a
    // detailed image
    const imgLoader = new Image();

    const loadImage = (imgSrc, onSuccess) => {
      // if defered image load exists, stop defered task.
      if (imgTimeoutID) clearTimeout(imgTimeoutID);

      // defer load of the detail image for 1 sec
      imgTimeoutID = setTimeout(() => {
        imgLoader.src = imgSrc;
      }, 1000);

      // set handlers in the on-properties
      imgLoader.onload = () => {
        onSuccess();
        imgLoaderSpinner.remove();
      };
      imgLoader.onerror = () => {
        imgLoaderSpinner.remove();
      };
    };

    searxng.selectImage = (resultElement) => {
      // add a class that can be evaluated in the CSS and indicates that the
      // detail view is open
      d.getElementById("results").classList.add("image-detail-open");

      // add a hash to the browser history so that pressing back doesn't return
      // to the previous page this allows us to dismiss the image details on
      // pressing the back button on mobile devices
      window.location.hash = "#image-viewer";

      searxng.scrollPageToSelected();

      // if there is none element given by the caller, stop here
      if (!resultElement) return;

      // find <img> object in the element, if there is none, stop here.
      const img = resultElement.querySelector(".result-images-source img");
      if (!img) return;

      // <img src="" data-src="http://example.org/image.jpg">
      const src = img.getAttribute("data-src");

      // already loaded high-res image or no high-res image available
      if (!src) return;

      // use the image thumbnail until the image is fully loaded
      const thumbnail = resultElement.querySelector(".image_thumbnail");
      img.src = thumbnail.src;

      // show a progress spinner
      const detailElement = resultElement.querySelector(".detail");
      detailElement.appendChild(imgLoaderSpinner);

      // load full size image in background
      loadImage(src, () => {
        // after the singelton loadImage has loaded the detail image into the
        // cache, it can be used in the origin <img> as src property.
        img.src = src;
        img.removeAttribute("data-src");
      });
    };

    searxng.closeDetail = () => {
      d.getElementById("results").classList.remove("image-detail-open");
      // remove #image-viewer hash from url by navigating back
      if (window.location.hash === "#image-viewer") window.history.back();
      searxng.scrollPageToSelected();
    };
    searxng.on(".result-detail-close", "click", (e) => {
      e.preventDefault();
      searxng.closeDetail();
    });
    searxng.on(".result-detail-previous", "click", (e) => {
      e.preventDefault();
      searxng.selectPrevious(false);
    });
    searxng.on(".result-detail-next", "click", (e) => {
      e.preventDefault();
      searxng.selectNext(false);
    });

    // listen for the back button to be pressed and dismiss the image details when called
    window.addEventListener("hashchange", () => {
      if (window.location.hash !== "#image-viewer") searxng.closeDetail();
    });

    d.querySelectorAll(".swipe-horizontal").forEach((obj) => {
      obj.addEventListener("swiped-left", () => {
        searxng.selectNext(false);
      });
      obj.addEventListener("swiped-right", () => {
        searxng.selectPrevious(false);
      });
    });

    w.addEventListener(
      "scroll",
      () => {
        var e = d.getElementById("backToTop"),
          scrollTop = document.documentElement.scrollTop || document.body.scrollTop,
          results = d.getElementById("results");
        if (e !== null) {
          if (scrollTop >= 100) {
            results.classList.add("scrolling");
          } else {
            results.classList.remove("scrolling");
          }
        }
      },
      true
    );
  });
})(window, document, window.searxng);