function Analytics() {

	this.BASE_URL = null;

	// Session
	this.sessionId = null;
	this.sessionDuration = 0;
	this.sessionIntervalId = null;

	// Click
	this.globalClickHandler = null;
	this.clickTimeoutTime = 1000;
	this.clickTimeoutId = null;
	this.clicks = [];

};

Analytics.prototype.trackClicks = function () {

	if (this.globalClickHandler !== null) return;

	let clickBucket = [];

	this.globalClickHandler = function clickhandler() {

		let mouseX, mouseY = null;

		if (event.clientX !== undefined && event.clientY !== undefined) {
			mouseX = event.clientX;
			mouseY = event.clientY;
		}
		else if (event.touches && event.touches[0]) {
			mouseX = event.touches[0].clientX;
			mouseY = event.touches[0].clientY;
		}

		if (mouseX === null || mouseY === null) return;

		clickBucket.push();

		analytics.clicks.push({ x: mouseX, y: mouseY });



		//clearTimeout(analytics.clickTimeoutId);

		// analytics.clickTimeoutId = setTimeout(() => {

		// 	console.log(clickBucket);
		// 	// if > 5, clicks are spam
		// 	if (clickBucket.length <= 5) analytics.clicks = [...analytics.clicks, ...clickBucket];

		// 	clickBucket = [];
		// }, analytics.clickTimeoutTime);
	}

	document.addEventListener('click', this.globalClickHandler);
}

Analytics.prototype.startSessionTrack = function () {

	analytics.stopSessionTrack();

	analytics.sessionIntervalId = setInterval(() => {
		if (document.visibilityState === 'visible') analytics.sessionDuration++;
	}, 1000);
}

Analytics.prototype.stopSessionTrack = function () {
	clearInterval(analytics.sessionIntervalId);
	analytics.sessionDuration = 0;
}

Analytics.prototype.trackUserRegistration = function (data) {

	let api = analytics.BASE_URL + '/api/analytics/track/user-registration'

	let affiliateHiveSlug = getCookie('affiliate-hive-slug');
	data.affiliateHiveSlug = affiliateHiveSlug;

	fetch(api, {
		method: 'POST',
		headers: {
			'Content-Type': 'application/json',
			'Accept': 'application/json'
		},

		body: JSON.stringify(data)
	});
}

Analytics.prototype.initBeacon = function () {

	if (analytics.BASE_URL === null) {
		console.error("Analytics: BASE_URL is not set.");
		return;
	}

	document.addEventListener("visibilitychange", function logData() {
		if (document.visibilityState === "hidden") {

			let sendBeaconRequest = true;
			let analyticsData = {
				userSessionId: analytics.sessionId,
				sessionDuration: analytics.sessionDuration,
				affiliateHiveSlug: getCookie('affiliate-hive-slug'),
				pageURL: window.location.href,
				clicks: analytics.clicks,
			};

			if (sendBeaconRequest === true) {
				navigator.sendBeacon(analytics.BASE_URL + '/api/analytics/track', JSON.stringify(analyticsData));
				analytics.clicks = [];
			}

			analytics.stopSessionTrack();
		} else if (document.visibilityState === 'visible') {
			analytics.startSessionTrack();
		}
	});
}

Analytics.prototype.initSession = function () {

	let s = null;
	let sessionStr = localStorage.getItem("analytics-session");

	if (sessionStr === null) {
		s = generateSession();
		localStorage.setItem("analytics-session", JSON.stringify(s));
	}
	else {
		let sessionObj = JSON.parse(sessionStr);
		s = sessionObj;
		let now = new Date().getTime();
		if (now > sessionObj.expiration) {
			s = generateSession();
			localStorage.setItem("analytics-session", JSON.stringify(s));
		}
	}

	analytics.sessionId = s.sessionId;

	function generateSession() {

		// expires at the end of the day 12:00am 
		// (keep this time for front ends filters to work properly)
		return {
			sessionId: uid('analytics'),
			expiration: new Date().getTime() + (minutesUntilEndOfDay() * 60 * 1000)
		}
	}
}

Analytics.prototype.init = function (BASE_URL = null) {

	analytics.BASE_URL = BASE_URL;

	this.initSession();
	this.trackClicks();
	this.startSessionTrack();
	this.initBeacon();
}

var analytics = new Analytics();


function uid(prefix = '') {
	let timestamp = Date.now().toString(36);
	let randomString = '';
	for (let i = 0; i < 8; i++) {
		randomString += Math.random().toString(36).substring(2, 10);
	}
	let randomNum = Math.floor(Math.random() * 1000);
	return prefix + timestamp + randomNum.toString() + randomString;
}

function getDateTime() {
	const now = new Date();

	const year = now.getFullYear();
	const month = String(now.getMonth() + 1).padStart(2, '0');
	const day = String(now.getDate()).padStart(2, '0');
	const hours = String(now.getHours()).padStart(2, '0');
	const minutes = String(now.getMinutes()).padStart(2, '0');
	const seconds = String(now.getSeconds()).padStart(2, '0');
	const amOrPm = hours >= 12 ? 'PM' : 'AM';

	const formattedDateTime = `${year}/${month}/${day} ${hours % 12}:${minutes}:${seconds} ${amOrPm}`;

	return formattedDateTime;
}

function getTimezoneName() {
	const now = new Date();
	const timezone = Intl.DateTimeFormat().resolvedOptions().timeZone;

	return timezone;
}

function minutesUntilEndOfDay() {
	const currentDate = new Date();
	const endOfDay = new Date(currentDate);
	endOfDay.setDate(currentDate.getDate() + 1);
	endOfDay.setHours(0, 0, 0, 0);
	const timeDifferenceMs = endOfDay - currentDate;
	const minutesUntilEnd = Math.floor(timeDifferenceMs / (1000 * 60));
	return minutesUntilEnd;
}

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