var refreshIntervalId = null;
// Prefer same-origin relative paths so HTTPS doesn't break due to mixed-content / upgrade rules.
var imgurl = "img/";

function buildThumbLi(filename) {
    var imgfile = imgurl + encodeURIComponent(filename);
    return (
        "<li data-filename='" + filename.replace(/'/g, "&#39;") + "'>" +
        "  <button type='button' class='thumb-delete' title='삭제' aria-label='삭제'>&times;</button>" +
        "  <a class='thumb' name='leaf' href='" + imgfile + "' title='" + filename.replace(/'/g, "&#39;") + "'>" +
        "    <img src='" + imgfile + "' alt='" + filename.replace(/'/g, "&#39;") + "' width='75' height='75'/>" +
        "  </a>" +
        "  <div class='caption'></div>" +
        "</li>"
    );
}

function removeFromImageList(filename) {
    if (!window.DREAMGIRL_IMAGES || !window.DREAMGIRL_IMAGES.length) return;
    var idx = window.DREAMGIRL_IMAGES.indexOf(filename);
    if (idx >= 0) window.DREAMGIRL_IMAGES.splice(idx, 1);
}

function deleteImageFile(filename, onSuccess, onError) {
    var fd = new FormData();
    fd.append('filename', filename);

    fetch('api/delete_image.php', {
        method: 'POST',
        body: fd,
        credentials: 'same-origin'
    })
        .then(function (r) { return r.json(); })
        .then(function (data) {
            if (!data || !data.ok) {
                throw new Error((data && data.error) ? data.error : '삭제 실패');
            }
            if (typeof onSuccess === 'function') onSuccess(data);
        })
        .catch(function (err) {
            if (typeof onError === 'function') {
                onError(err);
            } else {
                alert('에러: ' + (err && err.message ? err.message : '삭제 실패'));
            }
        });
}

function bindThumbDeleteHandler() {
    $('#thumbs').off('click.thumbDelete', '.thumb-delete');
    $('#thumbs').on('click.thumbDelete', '.thumb-delete', function (e) {
        e.preventDefault();
        e.stopPropagation();

        var $li = $(this).closest('li');
        var filename = $li.attr('data-filename');
        if (!filename) return;

        var $btn = $(this);
        $btn.prop('disabled', true);

        deleteImageFile(filename, function () {
            removeFromImageList(filename);

            if (window.dreamgirlGallery) {
                var gallery = window.dreamgirlGallery;
                var index = $li.index();
                var wasCurrent = gallery.currentImage && gallery.currentImage.index === index;

                if (typeof gallery.removeImageByIndex === 'function') {
                    gallery.removeImageByIndex(index);
                } else {
                    $li.remove();
                }

                if (wasCurrent && gallery.data && gallery.data.length) {
                    var nextIndex = Math.min(index, gallery.data.length - 1);
                    if (typeof gallery.gotoIndex === 'function') {
                        gallery.gotoIndex(nextIndex);
                    }
                }
            } else {
                $li.remove();
            }
        }, function (err) {
            $btn.prop('disabled', false);
            alert('에러: ' + (err && err.message ? err.message : '삭제 실패'));
        });
    });
}

function getApiUrl() {
    // Use scheme-relative URL so it matches http/https of the current page.
    // NOTE: if the API does not support https, consider proxying it via Apache and pointing to a same-origin endpoint.
    return "//api.martn.ncue.net/dreamgirl.ncue";
}

function getRandomIndex(n) {
    var arr = new Array();
    var temp;
    var rnum;

    for(var i=0; i<n; i++) {
        arr.push(i);
    }
    for(var i=0; i<arr.length; i++) {
        rnum = Math.floor(Math.random()*n);
        temp = arr[i];
        arr[i] = arr[rnum];
        arr[rnum] = temp;
    }
    return arr;
}

function onLoad() {

    function initGallery() {
        // We only want these styles applied when javascript is enabled
        // Layout is now handled by CSS (flex). Keep JS from forcing a fixed width.
        $('div.navigation').css({'width' : '', 'float' : ''});
        $('div.content').css('display', 'block');

        // Initially set opacity on thumbs and add additional styling for hover effect on thumbs
        var onMouseOutOpacity = 0.67;
        $('#thumbs ul.thumbs li').opacityrollover({
            mouseOutOpacity:   onMouseOutOpacity,
            mouseOverOpacity:  1.0,
            fadeSpeed:         'fast',
            exemptionSelector: '.selected'
        });

        // Initialize Advanced Galleriffic Gallery (store instance for uploader)
        window.dreamgirlGallery = $('#thumbs').galleriffic({
            delay:                     2500,
            numThumbs:                 15,
            preloadAhead:              10,
            enableTopPager:            true,
            enableBottomPager:         true,
            maxPagesToShow:            7,
            imageContainerSel:         '#slideshow',
            controlsContainerSel:      '#controls',
            captionContainerSel:       '#caption',
            loadingContainerSel:       '#loading',
            renderSSControls:          true,
            renderNavControls:         true,
            playLinkText:              'Play Slideshow',
            pauseLinkText:             'Pause Slideshow',
            prevLinkText:              '&lsaquo; Previous Photo',
            nextLinkText:              'Next Photo &rsaquo;',
            nextPageLinkText:          'Next &rsaquo;',
            prevPageLinkText:          '&lsaquo; Prev',
            enableHistory:             false,
            autoStart:                 true,
            syncTransitions:           true,
            defaultTransitionDuration: 900,
            onSlideChange:             function(prevIndex, nextIndex) {
                // 'this' refers to the gallery, which is an extension of $('#thumbs')
                this.find('ul.thumbs').children()
                    .eq(prevIndex).fadeTo('fast', onMouseOutOpacity).end()
                    .eq(nextIndex).fadeTo('fast', 1.0);
            },
            onPageTransitionOut:       function(callback) {
                this.fadeTo('fast', 0.0, callback);
            },
            onPageTransitionIn:        function() {
                this.fadeTo('fast', 1.0);
            }
        });
    }

    function buildThumbsFromList(fileNames) {
        var text = "<ul class='thumbs noscript'>";
        var rid = getRandomIndex(fileNames.length);

        for (var i=0; i<rid.length; i++) {
            var fname = fileNames[rid[i]];
            text += buildThumbLi(fname);
        }
        text += "</ul>";
        $("#thumbs-list").html(text);
        initGallery();
        bindThumbDeleteHandler();
    }

    function tryLoadFromLocalListApi() {
        return $.ajax({
            url: 'api/list_images.php',
            type: 'GET',
            dataType: 'json',
            cache: false,
            timeout: 8000
        });
    }

    function fallbackToLocalManifest() {
        if (window.DREAMGIRL_IMAGES && window.DREAMGIRL_IMAGES.length) {
            buildThumbsFromList(window.DREAMGIRL_IMAGES);
            return true;
        }
        // Minimal fallback if manifest is missing for some reason
        buildThumbsFromList(['0.jpg','1.jpg','2.jpg','3.jpg','20.jpg','24.jpg','25.jpg','26.jpg','28.jpg','36.jpg','66.jpg']);
        return true;
    }

    // Prefer same-origin dynamic list (so newly uploaded images appear on refresh).
    tryLoadFromLocalListApi()
        .done(function(resp) {
            if (resp && resp.ok && resp.images && resp.images.length) {
                buildThumbsFromList(resp.images);
            } else {
                fallbackToLocalManifest();
            }
        })
        .fail(function() {
            // If local list API is unavailable, try remote JSONP API, then fall back to static manifest.
            $.ajax({
                url : getApiUrl(),
                type: 'GET',
                data : "id=user",
                dataType : "jsonp",
                jsonp : "callback",
                cache : false,
                timeout: 15000,
                success: function(data) {
                    try {
                        var filelist = data && data.filelist ? data.filelist : null;
                        if (!filelist || !filelist.length) return fallbackToLocalManifest();
                        var names = [];
                        for (var i=0; i<filelist.length; i++) {
                            if (filelist[i] && filelist[i]["img"]) names.push(filelist[i]["img"]);
                        }
                        if (!names.length) return fallbackToLocalManifest();
                        buildThumbsFromList(names);
                    } catch (e) {
                        fallbackToLocalManifest();
                    }
                },
                error: function () {
                    fallbackToLocalManifest();
                }
            });
        });

    return true;
}


function toggle() {
	var audio = document.getElementById('betoven');
	var gallery = window.dreamgirlGallery;
	var isRunning = gallery
		? !!gallery.isSlideshowRunning
		: !!(audio && !audio.muted);

	if (isRunning) {
		if (audio) {
			audio.muted = true;
			try { audio.pause(); } catch (e) {}
		}
		if (gallery && typeof gallery.pause === 'function') {
			gallery.pause();
		}
		clearInterval(refreshIntervalId);
		refreshIntervalId = null;
		$("#toggle").html("start");
	} else {
		if (audio) {
			audio.muted = false;
			try {
				var playPromise = audio.play();
				if (playPromise && typeof playPromise.catch === 'function') {
					playPromise.catch(function () {});
				}
			} catch (e) {}
		}
		if (gallery && typeof gallery.play === 'function') {
			gallery.play();
		}
		$("#toggle").html("stop");
	}
}