function getCookie(name)
{
    let namePart = name + '=',
        decodedCookie = decodeURIComponent(document.cookie),
        cookies = decodedCookie.split(';');

    for(let index = 0; index < cookies.length; index++) {
        let cookie = cookies[index];

        while (cookie.charAt(0) === ' ') {
            cookie = cookie.substring(1);
        }

        if (cookie.indexOf(namePart) === 0) {
            return cookie.substring(namePart.length, cookie.length);
        }
    }

    return null;
}

function setCookie(name, value, expireDays = 0, domain = '')
{
    domain = domain ? domain : location.host;
    let expires = '';

    if (expireDays) {
        let date = new Date();
        date.setTime(date.getTime() + (expireDays * 24 * 60 * 60 * 1000));

        expires = 'expires=' + date.toUTCString();
    }

    document.cookie = name + '=' + value + ';domain=.' + domain + ';path=/;' + expires;
}

function getParameterByName(name, defaultValue = null)
{
    let parameter = getQueryParameterByName(name);

    if (parameter) {
        return parameter;
    }

    parameter = getCookie(name);

    return parameter ? parameter : defaultValue;
}

function getQueryParameterByName(name, url = window.location.href)
{
    let urlObject = new URL(url),
        urlParameters = urlObject.searchParams;

    return urlParameters.has(name) ? decodeURIComponent(urlParameters.get(name)) : null;
}

function uidGenerate(length)
{
    let result = '',
        characters = 'abcdefghijklmnopqrstuvwxyz',
        charactersLength = characters.length;

    for (let i = 0; i < length; i++) {
        result += characters.charAt(Math.floor(Math.random() * charactersLength));
    }

    return result;
}

function uid()
{
    let clickIdValue = clickId();

    if (clickIdValue) {
        return clickIdValue;
    }

    let subIdValue = subId();

    if (subIdValue) {
        return subIdValue;
    }

    let userId = getCookie('uid');

    if (!userId) {
        userId = uidGenerate(8);
        setCookie('uid', userId);
    }

    return userId;
}

function clickId()
{
    let clickIdValue = getParameterByName('clickid');

    if (clickIdValue) {
        return clickIdValue;
    }

    clickIdValue = getParameterByName('click-id');

    if (!clickIdValue) {
        return getParameterByName('click_id');
    }

    return clickIdValue;
}

function subId()
{
    let subIdValue = getParameterByName('subid');

    if (subIdValue) {
        return subIdValue;
    }

    subIdValue = getParameterByName('sub-id');

    if (!subIdValue) {
        return getParameterByName('sub_id');
    }

    return subIdValue;
}

function executeOnReady(callback) {
    if (document.readyState !== 'loading') {
        callback();
    } else {
        document.addEventListener('DOMContentLoaded', callback);
    }
}

function mixPanelInit()
{
    let userId = uid();

    mixpanel.init('9d1f06337c788fcd584725b02fc2e601', {debug: false, track_pageview: false, ignore_dnt: true});
    mixpanel.register({distinct_id: userId, $user_id: userId});
    mixpanel.identify(userId);
}

function mixPanelEvent(eventName, options = {})
{
    mixpanel.people.set_once(options);
    mixpanel.track(eventName, options);
}

function yandexGoal(goalName)
{
    if ('ym' in window) {
        ym(96921485, 'reachGoal', goalName);
    }
}

function downloadFromUrl(url)
{
    let downloadIframe = document.querySelector('.download-kit-frame');

    if (!downloadIframe) {
        downloadIframe = document.createElement('iframe');
        downloadIframe.setAttribute('style', 'position:absolute;top:-9999px;left:-9999px;visibility:hidden;width:1px;height:1px;border:0;');
        downloadIframe.classList.add('download-kit-frame');

        document.body.appendChild(downloadIframe);
    }

    downloadIframe.setAttribute('src', url);
}

function downloadFromFile(url, filename)
{
    // Construct the <a> element
    let link = document.createElement('a');
    link.download = filename;
    link.href = url;

    document.body.appendChild(link);
    link.click();

    document.body.removeChild(link);
}

function download(url)
{
    let link = document.querySelector('[data-download="link"]');
    link.href = url;
    link.click();
}

function isMobile()
{
    return (new RegExp('Android|BlackBerry|iPhone|iPod|Opera Mini', 'i'))
        .test(window.navigator.userAgent.toString());
}

window.trackingBlocked = false;
window.addEventListener('error', function (event) {
    let analyticOptions = analyticEventOptions();
    analyticOptions.error = event.message;

    fireTest('window_error', analyticOptions);
});

//setInterval(function () {console.log(document.hidden)}, 500)

function detectTrackingBlocked(callback)
{
    let img = document.querySelector('.tracking-img');

    if (img) {
        callback(window.trackingBlocked);
        return;
    }

    let imgElement = document.createElement('img');

    imgElement.src = 'https://cdn.mxpnl.com/marketing-site/static/favicons/favicon-16x16.png';
    imgElement.style.display = 'none';
    imgElement.classList.add('tracking-img');

    imgElement.addEventListener('load', function(){
        window.trackingBlocked = false;

        //mixPanelEvent('tracking_image_load', analyticEventOptions());
        callback(window.trackingBlocked);
    });

    imgElement.addEventListener('error', function(){
        window.trackingBlocked = true;

        //fireTest('tracking_image_not_load', analyticEventOptions());
        callback(window.trackingBlocked);
    });

    document.body.appendChild(imgElement);
}

function analyticEventOptions()
{
    let globalTestId = getCookie('gid'),
        designTestId = getCookie('dt_id'),
        host = location.host,
        designGroup = 'Main',
        options = {};

    if (designTestId) {
        designGroup = getCookie('dt_gr');
        options.design_test_group = designGroup;
        options.design_test_id = designTestId;
    } else {
        options.design_test_group = null;
        options.design_test_id = null;
    }

    if (globalTestId) {
        options.test_group = getCookie('ggr') ?? 'Main';
        options.test_id = globalTestId;
    } else {
        options.test_group = null;
        options.test_id = null;
    }

    if (host === 'cint.pbrowse.me') {
        options.app = 'privacy3';
    } else if (host === 'cintlp.pgaurdroute.me') {
        options.app = 'privacy2';
    } else {
        options.app = 'privacy1';
    }

    options.host = host;
    options.ua = window.navigator.userAgent;
    options.design_group = designGroup;
    options.device = isMobile() ? 'mobile' : 'desktop';
    options.tracking = !window.trackingBlocked;
    options.user_id = uid();
    options.otid = getParameterByName('otid', '');

    let url = new URL(document.location.href),
        parameters = url.searchParams;

    parameters.forEach(function (value, key) {
        options[key] = value;
    });

    return options;
}

function fireEvent(event, page, additionalOptions = {})
{
    if (typeof mixpanel.track !== 'function') {
        mixPanelInit();
    }

    detectTrackingBlocked(function (trackingBlocked) {
        let options = analyticEventOptions();
        options.page = page;

        Object.keys(additionalOptions).forEach((key) => {
            if (additionalOptions.hasOwnProperty(key)) {
                options[key] = additionalOptions[key];
            }
        });

        if (typeof mixpanel.track !== 'function') {
            fireTest('mixpanel_not_init', options);
        }

        if (trackingBlocked) {
            fireTest(event, options);

            if (event === 'page_load') {
                fireUntrackedPixel(0);
            }
        } else {
            mixPanelEvent(event, options);
            yandexGoal(event);

            fireSignal(event, options);
        }
    });
}

function fireTest(event, properties = {})
{
    properties.design_group = window.trackingBlocked ? 'Test' : 'Main';
    properties.referrer = document.location.href;
    properties.event = event;

    const formData = new FormData()
    formData.append('uid', uid());
    formData.append('event', event);
    formData.append('options', JSON.stringify(properties));

    fetch(location.origin + '/lp/signal-t/', {
        method: 'POST',
        cache: 'no-cache',
        credentials: 'same-origin',
        body: formData
    }).then(function(response) { return response.text() });
}

function fireSignal(signalName, options)
{
    options['event'] = signalName;

    let signalData = {
        source: 'bridge_page',
        keyword: 'landing_page',
        signal_type: 'bridge_keyword_load',
        val: JSON.stringify(options),
        device: isMobile() ? 'mobile' : 'desktop',
        geo: 'us'
    };

    let request = new FormData();
    request.append('signals', JSON.stringify([signalData]));

    fetch(location.origin + '/lp/signal/', {
            method: 'POST',
            mode: 'no-cors',
            credentials: 'same-origin',
            headers: {
                'Content-Type': 'application/json'
            },
            body: request
        })
        .then(function (response) {
            return response.text();
        })
        .catch(function (error) {console.log(error)});
}

function fireUntrackedPixel(tracking)
{
    let pixelUrl = new URL('https://get.searcheasily.net/report/desktop-apps/?action=page_load');

    pixelUrl.searchParams.set('cid', getParameterByName('cid', ''));
    pixelUrl.searchParams.set('clickid', clickId() ?? '');
    pixelUrl.searchParams.set('tracking', tracking);

    fetch(pixelUrl.href, {
        method: 'GET',
        cache: 'no-cache',
        credentials: 'same-origin',
    })
        .then(function (response) {return response.text()})
        .catch(function (error) {console.log(error)});
}

function fireUserPropertyUpdate(properties) {
    if (typeof mixpanel.track !== 'function') {
        mixPanelInit();
    }

    detectTrackingBlocked(function (trackingBlocked) {
        if (!trackingBlocked) {
            mixpanel.people.set(properties);
        }
    });
}