let htDeviceId, htSessionId, htNewSession = false;

function generateDeviceID() {
    return  (Date.now().toString().substring(1)+(Math.random().toString().substr(2)) +
            (Math.random().toString().substr(2))).substr(0,27);
}

function getCookie (name) {
    let value = `; ${document.cookie}`;
    let parts = value.split(`; ${name}=`);
    if (parts.length === 2) return parts.pop().split(';').shift();
}

function setCookie (name, value, expiration) {
    document.cookie = `${name}=${value};path=/;expires=${expiration}`;
}

function getCookieExpiration(offset = null) {
    offset = offset || (10 * 365 * 24 * 60 * 60 * 1000);
    let d = new Date();
    d.setTime(d.getTime() + offset);
    return  d.toUTCString();
}

function getDeviceId() {
    htDeviceId = htDeviceId || getCookie('ht_device_id');
    if(!htDeviceId) {
        htDeviceId = generateDeviceID();
        setCookie('ht_device_id', htDeviceId, getCookieExpiration());
    }
    return htDeviceId;
}

function getSessionId() {
    htSessionId = htSessionId || getCookie('ht_session_id');
    if(!htSessionId) {
        htNewSession = true;
        htSessionId = generateDeviceID();
        setCookie('ht_session_id', htSessionId, getCookieExpiration(30 * 60 * 1000));
    }
    return htSessionId;
}

function getScreenPlatform()
{
    let windowWidth = window.innerWidth;
    let screenPlatform = "";

    let sizeToPlatformMap = {
        "desktop": 1025,
        "tablet.landscape": 961,
        "tablet.portrait": 768,
        "phone": 0,
    };
    

    for (let platform of Object.keys(sizeToPlatformMap)){
        let minSize = sizeToPlatformMap[platform];
        if (windowWidth >= minSize){
            screenPlatform = platform;
            break;
        }
    }

    return screenPlatform;
}

function trackEvent(eventName, additionalData = {}) {
    let screenPlatform = getScreenPlatform();
    let eventData = {
        "device_id": getDeviceId(),
        "tracking_id": getDeviceId(),
        "session_platform": screenPlatform,
        "session_screen_platform": screenPlatform,
        "session_id": getSessionId(),
        "session_new_session": htNewSession,
        "session_user_agent": window.navigator.userAgent,
        "page_url": window.location.origin + window.location.pathname,
        "page_url_qs": window.location.search.substring(1),
        "page_type": 'rsoc_landing',
        "site_js_site": 'rsoc',
        "event_topic":"user_events",
        "theme_name": "hometalk",
        "event_name":eventName
    }
    eventData = { ...eventData, ...additionalData };
    
    
    var xhr = new XMLHttpRequest();
    xhr.open("POST", 'https://www.hometalk.com/eventStream', true);
    xhr.setRequestHeader('Content-Type', 'application/json');
    xhr.send(JSON.stringify(eventData));
}

trackEvent('New Page');

window.htTracker = trackEvent;

if (typeof gtag === 'function') {
    gtag('config', 'G-0HSPVPZN5P');
}