var wheAnalyticsData                = {};
var wheAnalyticsSent                = false;
var wheAnalyticsExcludedReferrers   = [
    'anonymised.io',
];

function wheAnalyticsPageview() {
    wheAnalyticsRecord('pageview');
}

function wheAnalyticsArticleread() {
    wheAnalyticsRecord('articleread');
}

function wheAnalyticsCTR(r_category, r_item, r_component, r_action, r_frequency,callback) {
    if (['view','click'].includes(r_action.toLowerCase())) {
        let apiUrl      = new URL(window.location.protocol+'//'+window.location.host+'/analytics/?p=ctr');
        r_category      = r_category    || '';
        r_item          = r_item        || '';
        r_component     = r_component   || '';
        r_action        = r_action      || '';
        r_frequency     = r_frequency   || 'm';
        if (!['d','m','y','*'].includes(r_frequency.toLowerCase())) {
            r_frequency = 'm';
        }
        let postData = {
            category:   r_category.toLowerCase(),
            item:       r_item.toLowerCase(),
            component:  r_component.toLowerCase(),
            action:     r_action.toLowerCase(),
            frequency:  r_frequency,
        };
        const myHeaders = new Headers();
        myHeaders.append("Content-Type", "application/json");
        fetch(apiUrl, {
            method: "POST",
            body: JSON.stringify(postData),
            headers: myHeaders,
        }).then((response) => response.json()).then((result)=>{
            if (result.status >= 400) {
                console.error('WHE Analytics:','CTR error',result);
            } else {
                console.log('WHE Analytics:','CTR recorded',postData);
            }
            if (typeof callback == 'function') {
                callback();
            }
        });
    } else {
        console.error('wheAnalyticsCTR(): Invalid action. Must be "view" or "click".');
    }
}

function wheAnalyticsRecord(path) {
    let pathname = new URL(window.location).pathname;
    let canonical;
    if (!isBot() && !wheAnalyticsExcludedReferrers.some(v => document.referrer.includes(v))) {
        wheAnalyticsData = {
            p               : path,
            guid            : AHE.ci_id,
            lang            : AHE.contentLang || document.querySelector('html').getAttribute('lang').substr(0,2),
            author          : AHE.ci_author,
            author_id       : AHE.ci_author_id,
            translator      : AHE.ci_translator,
            translator_id   : AHE.ci_translator_id,
            url             : pathname,
            ab              : AHE.ab,
            known           : AHE.knownUser,
        };
        if (canonical = document.querySelector('link[rel=canonical]')) {
            if (typeof canonical.href == 'string') {
                canonical = canonical.href.replace(new URL(canonical.href).origin,'');
                wheAnalyticsData.url = canonical;
            }
        }
        if (!getCookie('wheAnalyticsUserKnown')) {
            wheAnalyticsData.new_user = 1;
        }
        if (!getCookie('wheAnalyticsSessionKnown')) {
            wheAnalyticsData.new_session = 1;
        }
        let apiUrl     = new URL(window.location.protocol+'//'+window.location.host+'/analytics/');
        Object.keys(wheAnalyticsData).forEach(key => apiUrl.searchParams.append(key, wheAnalyticsData[key]))
        wheAnalyticsSent = true;
        fetch(apiUrl)
            .then((response) => response.json())
            .then((result)=>{
                if (result.status >= 400) {
                    console.error('WHE Analytics:','error',result);
                } else {
                    console.log('WHE Analytics:','pageview sent',result);
                }
                setCookie('wheAnalyticsUserKnown',1,365);
                setCookie('wheAnalyticsSessionKnown',1);
            });
    }
}

function isBot() {
    return navigator.webdriver || /bot|crawl|spider|googleother|google-extended|apis-google|mediapartners|baidu|bing|msn|teoma|slurp|yandex|anthropic|claude|chatgpt|cohere/i.test(navigator.userAgent);
}

function getCookie(c_name) {
    var i,x,y,ARRcookies=document.cookie.split(";");
    for (i=0;i<ARRcookies.length;i++) {
        x=ARRcookies[i].substr(0,ARRcookies[i].indexOf("="));
        y=ARRcookies[i].substr(ARRcookies[i].indexOf("=")+1);
        x=x.replace(/^\s+|\s+$/g,"");
        if (x==c_name) {
            return unescape(y);
        }
    }
}

function setCookie(name,value,days,sameSite) {
    var expires = '';
    if (days > 0) {
        var date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        expires = "; expires=" + date.toGMTString();
    }
    if (!sameSite) {
        sameSite = 'Lax';
    }
    let domain = '';
    if (AHE.domain) {
        domain = ' domain='+AHE.domain+';';
    }
    let cookiestring = name+"="+value+expires+";"+domain+" path=/; SameSite="+sameSite+"; Secure";
    document.cookie = cookiestring;
}