// A full size 'lightbox' preview modal shown when left clicking on gallery previews
/*
function closeModal() {
    gradioApp().getElementById("lightboxModal").style.display = "none";
}

function showModal(event) {
    const source = event.target || event.srcElement;
    const modalImage = gradioApp().getElementById("modalImage")
    const lb = gradioApp().getElementById("lightboxModal")
    modalImage.src = source.src
    if (modalImage.style.display === 'none') {
        lb.style.setProperty('background-image', 'url(' + source.src + ')');
    }
    lb.style.display = "flex";
    lb.focus()

    const tabTxt2Img = gradioApp().getElementById("tab_txt2img")
    const tabImg2Img = gradioApp().getElementById("tab_img2img")
    // show the save button in modal only on txt2img or img2img tabs
    if (tabTxt2Img.style.display != "none" || tabImg2Img.style.display != "none") {
        gradioApp().getElementById("modal_save").style.display = "inline"
    } else {
        gradioApp().getElementById("modal_save").style.display = "none"
    }
    event.stopPropagation()
}

function negmod(n, m) {
    return ((n % m) + m) % m;
}

function updateOnBackgroundChange() {
    const modalImage = gradioApp().getElementById("modalImage")
    if (modalImage && modalImage.offsetParent) {
        let currentButton = selected_gallery_button();

        if (currentButton?.children?.length > 0 && modalImage.src != currentButton.children[0].src) {
            modalImage.src = currentButton.children[0].src;
            if (modalImage.style.display === 'none') {
                modal.style.setProperty('background-image', `url(${modalImage.src})`)
            }
        }
    }
}

function modalImageSwitch(offset) {
    var galleryButtons = all_gallery_buttons();

    if (galleryButtons.length > 1) {
        var currentButton = selected_gallery_button();

        var result = -1
        galleryButtons.forEach(function(v, i) {
            if (v == currentButton) {
                result = i
            }
        })

        if (result != -1) {
            nextButton = galleryButtons[negmod((result + offset), galleryButtons.length)]
            nextButton.click()
            const modalImage = gradioApp().getElementById("modalImage");
            const modal = gradioApp().getElementById("lightboxModal");
            modalImage.src = nextButton.children[0].src;
            if (modalImage.style.display === 'none') {
                modal.style.setProperty('background-image', `url(${modalImage.src})`)
            }
            setTimeout(function() {
                modal.focus()
            }, 10)
        }
    }
}

function saveImage(){
    const tabTxt2Img = gradioApp().getElementById("tab_txt2img")
    const tabImg2Img = gradioApp().getElementById("tab_img2img")
    const saveTxt2Img = "save_txt2img"
    const saveImg2Img = "save_img2img"
    if (tabTxt2Img.style.display != "none") {
        gradioApp().getElementById(saveTxt2Img).click()
    } else if (tabImg2Img.style.display != "none") {
        gradioApp().getElementById(saveImg2Img).click()
    } else {
        console.error("missing implementation for saving modal of this type")
    }
}

function modalSaveImage(event) {
    saveImage()
    event.stopPropagation()
}

function modalNextImage(event) {
    modalImageSwitch(1)
    event.stopPropagation()
}

function modalPrevImage(event) {
    modalImageSwitch(-1)
    event.stopPropagation()
}

function modalKeyHandler(event) {
    switch (event.key) {
        case "s":
            saveImage()
            break;
        case "ArrowLeft":
            modalPrevImage(event)
            break;
        case "ArrowRight":
            modalNextImage(event)
            break;
        case "Escape":
            closeModal();
            break;
    }
}

function setupImageForLightbox(e) {
	if (e.dataset.modded)
		return;

	e.dataset.modded = true;
	e.style.cursor='pointer'
	e.style.userSelect='none'

	var isFirefox = navigator.userAgent.toLowerCase().indexOf('firefox') > -1

	// For Firefox, listening on click first switched to next image then shows the lightbox.
	// If you know how to fix this without switching to mousedown event, please.
	// For other browsers the event is click to make it possiblr to drag picture.
	var event = isFirefox ? 'mousedown' : 'click'

	e.addEventListener(event, function (evt) {
		if(!opts.js_modal_lightbox || evt.button != 0) return;

		modalZoomSet(gradioApp().getElementById('modalImage'), opts.js_modal_lightbox_initially_zoomed)
		evt.preventDefault()
		showModal(evt)
	}, true);

}

function modalZoomSet(modalImage, enable) {
    if (enable) {
        modalImage.classList.add('modalImageFullscreen');
    } else {
        modalImage.classList.remove('modalImageFullscreen');
    }
}

function modalZoomToggle(event) {
    modalImage = gradioApp().getElementById("modalImage");
    modalZoomSet(modalImage, !modalImage.classList.contains('modalImageFullscreen'))
    event.stopPropagation()
}

function modalTileImageToggle(event) {
    const modalImage = gradioApp().getElementById("modalImage");
    const modal = gradioApp().getElementById("lightboxModal");
    const isTiling = modalImage.style.display === 'none';
    if (isTiling) {
        modalImage.style.display = 'block';
        modal.style.setProperty('background-image', 'none')
    } else {
        modalImage.style.display = 'none';
        modal.style.setProperty('background-image', `url(${modalImage.src})`)
    }

    event.stopPropagation()
}

function galleryImageHandler(e) {
    //if (e && e.parentElement.tagName == 'BUTTON') {
        e.onclick = showGalleryImage;
    //}
}

onUiUpdate(function() {
    fullImg_preview = gradioApp().querySelectorAll('.gradio-gallery > div > img')
    if (fullImg_preview != null) {
        fullImg_preview.forEach(setupImageForLightbox);
    }
    updateOnBackgroundChange();
})

document.addEventListener("DOMContentLoaded", function() {
    //const modalFragment = document.createDocumentFragment();
    const modal = document.createElement('div')
    modal.onclick = closeModal;
    modal.id = "lightboxModal";
    modal.tabIndex = 0
    modal.addEventListener('keydown', modalKeyHandler, true)

    const modalControls = document.createElement('div')
    modalControls.className = 'modalControls gradio-container';
    modal.append(modalControls);

    const modalZoom = document.createElement('span')
    modalZoom.className = 'modalZoom cursor';
    modalZoom.innerHTML = '⤡'
    modalZoom.addEventListener('click', modalZoomToggle, true)
    modalZoom.title = "Toggle zoomed view";
    modalControls.appendChild(modalZoom)

    const modalTileImage = document.createElement('span')
    modalTileImage.className = 'modalTileImage cursor';
    modalTileImage.innerHTML = '⊞'
    modalTileImage.addEventListener('click', modalTileImageToggle, true)
    modalTileImage.title = "Preview tiling";
    modalControls.appendChild(modalTileImage)

    const modalSave = document.createElement("span")
    modalSave.className = "modalSave cursor"
    modalSave.id = "modal_save"
    modalSave.innerHTML = "🖫"
    modalSave.addEventListener("click", modalSaveImage, true)
    modalSave.title = "Save Image(s)"
    modalControls.appendChild(modalSave)

    const modalClose = document.createElement('span')
    modalClose.className = 'modalClose cursor';
    modalClose.innerHTML = '×'
    modalClose.onclick = closeModal;
    modalClose.title = "Close image viewer";
    modalControls.appendChild(modalClose)

    const modalImage = document.createElement('img')
    modalImage.id = 'modalImage';
    modalImage.onclick = closeModal;
    modalImage.tabIndex = 0
    modalImage.addEventListener('keydown', modalKeyHandler, true)
    modal.appendChild(modalImage)

    const modalPrev = document.createElement('a')
    modalPrev.className = 'modalPrev';
    modalPrev.innerHTML = '❮'
    modalPrev.tabIndex = 0
    modalPrev.addEventListener('click', modalPrevImage, true);
    modalPrev.addEventListener('keydown', modalKeyHandler, true)
    modal.appendChild(modalPrev)

    const modalNext = document.createElement('a')
    modalNext.className = 'modalNext';
    modalNext.innerHTML = '❯'
    modalNext.tabIndex = 0
    modalNext.addEventListener('click', modalNextImage, true);
    modalNext.addEventListener('keydown', modalKeyHandler, true)

    modal.appendChild(modalNext)

    gradioApp().appendChild(modal)


    document.body.appendChild(modal);

});
*/
//called from progressbar
function showGalleryImage() {
  //need to clean up the old code
}

let like;
let tile;

let slide = 0;
let gallery = [];
let fullImg_src;
//let control = ["pan","undo","like","tile","page","fullscreen","autofit","zoom-in","zoom-out","clear","close","download","prev","next"];
let control = [
  "like",
  "tile",
  "page",
  "fullscreen",
  "autofit",
  "zoom-in",
  "zoom-out",
  "clear",
  "close",
  "download",
  "prev",
  "next",
];

let img_browser;
let img_file_name;

let spl_pane;
let spl_zoom_out;
let spl_zoom_in;
let spotlight_gallery;

function tile_zoom_update(val) {
  let current_tile_state_size = gallery[slide].tile_size;
  current_tile_state_size += val * 5;
  current_tile_state_size = Math.max(5, Math.min(100, current_tile_state_size));
  spl_pane.style.setProperty("background-size", current_tile_state_size + "%");
  gallery[slide].tile_size = current_tile_state_size;
}

function tile_wheel(event) {
  let delta = event["deltaY"];
  delta = (delta < 0 ? 1 : delta ? -1 : 0) * 0.5;
  tile_zoom_update(delta);
}
function tile_zoom_in(event) {
  tile_zoom_update(1);
}
function tile_zoom_out(event) {
  tile_zoom_update(-1);
}

function removeTile() {
  spl_pane.removeEventListener("wheel", tile_wheel);
  spl_zoom_out.removeEventListener("click", tile_zoom_out);
  spl_zoom_in.removeEventListener("click", tile_zoom_in);

  spl_pane.classList.remove("hide");
  spl_pane.style.setProperty("background-image", "none");
  spotlight_gallery.zoom(0.0);
}

function addTile(spl_img) {
  spl_pane.addEventListener("wheel", tile_wheel);
  spl_zoom_out.addEventListener("click", tile_zoom_out);
  spl_zoom_in.addEventListener("click", tile_zoom_in);

  const current_tile_state_size = gallery[slide].tile_size;
  spl_pane.classList.add("hide");
  spl_pane.style.setProperty("background-position", "center");
  spl_pane.style.setProperty("background-size", current_tile_state_size + "%");
  if (spl_img) {
    spl_pane.style.setProperty("background-image", `url(${spl_img.src})`);
  }
}

function tile_handler(event) {
  const current_tile_state = !gallery[slide].tile;
  gallery[slide].tile = current_tile_state;

  this.classList.toggle("on");

  if (current_tile_state) {
    const spl_img = gradioApp().querySelector("#spotlight-gal .spl-pane img");
    addTile(spl_img);
  } else {
    removeTile();
  }
}
function like_handler(event) {
  const current_like_state = !gallery[slide].like;
  gallery[slide].like = current_like_state;
  this.classList.toggle("on");

  if (current_like_state) {
    // add to favorites ...
    //img_file_name.value = gallery[slide].src;
    //console.log(gallery[slide].src);
  } else {
    // remove from favorites ...
  }
}

function createGallerySpotlight() {
  //console.log("clicked");
  slide = 0;
  gallery = [];

  gradioApp()
    .querySelectorAll("#" + selectedTabItemId + " .thumbnails img")
    .forEach(function (elem, i) {
      elem.setAttribute("gal-id", i);
      //if(fullImg_src == elem.src) slide = parseInt(i+1);
      if (elem.parentElement.className.indexOf("selected") != -1)
        slide = parseInt(i + 1);
      //console.log(slide);
      gallery[i] = {
        src: elem.src,
        title: "Seed:" + elem.src,
        //description: "This is a description.",
        like: false,
        tile: false,
        tile_size: 50,
      };
    });

  const options = {
    class: "sd-gallery",
    index: slide,
    //control: ["like","page","theme","fullscreen","autofit","zoom-in","zoom-out","close","download","play","prev","next"],
    control: control,
    //animation: animation,
    onshow: function (index) {},
    onchange: function (index, options) {
      slide = index - 1;
      tile.classList.toggle("on", gallery[slide].tile);
      //if(img_browser){
      like.classList.toggle("on", gallery[slide].like);

      //}

      spl_pane = gradioApp().querySelector(
        "#spotlight-gal .spl-pane:nth-child(" + index + ")"
      );
      spl_zoom_out = gradioApp().querySelector("#spotlight-gal .spl-zoom-out");
      spl_zoom_in = gradioApp().querySelector("#spotlight-gal .spl-zoom-in");

      const current_tile_state = gallery[slide].tile;
      if (current_tile_state) {
        addTile();
      } else {
        removeTile();
      }
    },
    onclose: function (index) {
      gradioApp()
        .querySelector(
          "#" +
            selectedTabItemId +
            " .thumbnails .thumbnail-item:nth-child(" +
            (slide + 1) +
            ")"
        )
        .click();
    },
  };

  //assign(options, modifier);

  spotlight_gallery.show(gallery, options);
  spotlight_gallery.panzoom(true);
}

function fullImg_click_handler(e) {
  e.stopPropagation();
  e.preventDefault();
  createGallerySpotlight();
}

let intervalUiUpdateIViewer;
function onUiHeaderTabUpdate() {
  if (intervalUiUpdateIViewer != null) clearInterval(intervalUiUpdateIViewer);
  intervalUiUpdateIViewer = setInterval(onUiUpdateIViewer, 500);
}

let fullImg_preview;
function onUiUpdateIViewer() {
  clearInterval(intervalUiUpdateIViewer);
  //update_performant_inputs(selectedTabItemId);

  //fullImg_preview = gradioApp().querySelector('#'+selectedTabItemId+' [id$="2img_results"] .modify-upload + img.w-full.object-contain');
  fullImg_preview = gradioApp().querySelector(
    "#" + selectedTabItemId + " .preview > img"
  );
  if (opts.js_modal_lightbox && fullImg_preview) {
    fullImg_src = fullImg_preview.src;
    fullImg_preview.removeEventListener("click", fullImg_click_handler);
    fullImg_preview.addEventListener("click", fullImg_click_handler, true); //bubbling phase

    /*
		// this is an idea to integrate image browser extension seamlesly, 
		// without the need to change to the image browser tab extension users will be able to review images after generation
		// and add them to favorites or delete the ones that don't like on the spot
		const img_browser = gradioApp().querySelector('[id$="2img_images_history"]');
		const tbname = selectedTabItemId.split("_")[1];
		if(img_browser && tbname ==("txt2img" || "img2img")){
			const images_history = gradioApp().querySelector('[id$="'+tbname+'_images_history"]');
			const history_button_panel = images_history.querySelector('[id$="'+tbname+'_images_history_button_panel"]');
			const labels = images_history.querySelectorAll('label.block span');
			for(let i=0;i<labels.length;i++){
				//console.log(labels[i].innerHTML)
				if(labels[i].innerHTML == 'File Name'){
					img_file_name = labels[i].parentElement.querySelector("textarea");
					console.log(img_file_name.value);
					break;
				}
			}
		}
		*/
  }
}

onUiUpdate(function () {
  if (intervalUiUpdateIViewer != null) clearInterval(intervalUiUpdateIViewer);
  intervalUiUpdateIViewer = setInterval(onUiUpdateIViewer, 500);
});

onUiLoaded(function () {
  spotlight_gallery = new Spotlight();
  spotlight_gallery.init(
    gradioApp().querySelector(".gradio-container"),
    "-gal"
  );
  tile = spotlight_gallery.addControl("tile", tile_handler);
  like = spotlight_gallery.addControl("like", like_handler);
});

document.addEventListener("DOMContentLoaded", function () {});