//List of Search Engines
const searchengines = { "google": "Google", Bing: "Bing" };
const socialsites = {
  "https://protect-us.mimecast.com/s/MzYtC1wVqEuBlD3LTpdTPS?domain=twitter.com": "Twitter",
  "https://protect-us.mimecast.com/s/7wvxC2kGr2tZgJ10U2Zo59?domain=t.co": "Twitter",
  "https://protect-us.mimecast.com/s/9PijC31YvEu9OJqWhQy9Ro?domain=linkedin.com": "Linkedin",
  "https://protect-us.mimecast.com/s/mp9lC4xWwVS9qQgRhMApk_?domain=facebook.com": "Facebook",
  "twitter.com": "Twitter",
  "t.co": "Twitter",
  "linkedin.com": "Linkedin",
  "facebook.com": "Facebook",
};


let campaign_attribution_utm_source = "";
let campaign_attribution_utm_medium = "";
let campaign_attribution_utm_campn_name = ""; 
let campaign_attribution_utm_content = "";
let campaign_attribution_utm_term = "";

/**
* Get Parameter from URL
*/
function getParameterByName(name) {
    name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
    const regex = new RegExp("[\\?&]" + name + "=([^&#]*)","i"),
    results = regex.exec(location.search);
    return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
}
/**
* Get Attribution cookie stored value
*/
function getAttributionCookie(cookie_name) {
	let name = cookie_name + "=";
	let ca = document.cookie.split(';');
	for(var i=0; i<ca.length; i++) {
		let c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1);
		if (c.indexOf(name) == 0) return c.substring(name.length, c.length);
	}
	return "";
}
/*
* Get Main Domain
*/
function getMainDomain() {
	let i=0,currentdomain=document.domain,p=currentdomain.split('.'),s='_gd'+(new Date()).getTime();
	while(i<(p.length-1) && document.cookie.indexOf(s+'='+s)==-1){
	   currentdomain = p.slice(-1-(++i)).join('.');
	   document.cookie = s+"="+s+";domain="+currentdomain+";";
	}
	document.cookie = s+"=;expires=Thu, 01 Jan 1970 00:00:01 GMT;domain="+currentdomain+";";
	return currentdomain;
 } 
/*
* Set attribution cookie
*/
function setAttributionCookie(cookie_name,cookie_value){
	document.cookie = cookie_name + "=" + decodeURIComponent(cookie_value)+";path=/;domain="+getMainDomain()+";"
}
/*
* Get Hostname
*/
function get_hostname(url) {
	let host = url.replace(/(.+:\/\/)|(www.)|(\/.+)|(\?.+)/g,'');
	if('protect-us.mimecast.com' == host){
	   	var m = url.match(/^(http|https):\/\/.*/);
		host = m ? m[0] : null;
	}
	return host;
}
/* 
* Setting up UTM Params
*/
function setUTMParameters(){

	//checking url query string for utm params
	let utm_source = getParameterByName('utm_source'); 
	let utm_medium = getParameterByName('utm_medium');
	let utm_campaign = getParameterByName('utm_campaign'); 
	let utm_content = getParameterByName('utm_content');
	let utm_term = getParameterByName('utm_term');

	if(utm_source || utm_medium || utm_campaign || utm_content || utm_term){
		campaign_attribution_utm_source = utm_source ? utm_source : "Direct";
		campaign_attribution_utm_medium = utm_medium ? utm_medium : "Direct";
		campaign_attribution_utm_campn_name = utm_campaign ? utm_campaign : "Not Provided";
		campaign_attribution_utm_content = utm_content ? utm_content : "Not Provided";
		campaign_attribution_utm_term = utm_term ? utm_term : "Not Provided";
	}

	//generating utm params from refrral 
	else{
		const document_referrer = document.referrer;	
		let referralhost = get_hostname(document_referrer);

		//If the
		if(referralhost){		
			//Check if it is from search engine
			for (let key in searchengines) {
				if (referralhost.toLowerCase().indexOf(key.toLowerCase()) >= 0){
					campaign_attribution_utm_medium = 'Organic';
					campaign_attribution_utm_source = searchengines[key];
					break;
				}
			}
			//if not found in searchengines
			if(!campaign_attribution_utm_medium){
				//Check in Social sites
				referralhost = referralhost.replace(/.*?:\/\//g, "");
				referralhost = referralhost.replace('www.', '');
				for (let key in socialsites) {
					if ((referralhost.toLowerCase().indexOf(key.toLowerCase()))>=0){
						campaign_attribution_utm_medium = 'Social';
						campaign_attribution_utm_source = socialsites[key];
						break;
					}
				}					
			}
			if(!campaign_attribution_utm_medium) {
				// Check for Referrer
				campaign_attribution_utm_medium = "Referrer";
				campaign_attribution_utm_source = document_referrer;
			}
		}

		else{
			campaign_attribution_utm_medium = "Direct Traffic";
			campaign_attribution_utm_source = "Direct";
		}
	}

	if(!getAttributionCookie('utm_medium') || !getAttributionCookie('utm_source') || (campaign_attribution_utm_source != 'Direct' && campaign_attribution_utm_medium != "Referrer")){	
		setAttributionCookie('utm_source',campaign_attribution_utm_source);
		setAttributionCookie('utm_medium',campaign_attribution_utm_medium);
		setAttributionCookie('utm_campaign',campaign_attribution_utm_campn_name);
		setAttributionCookie('utm_content',campaign_attribution_utm_content);
		setAttributionCookie('utm_term',campaign_attribution_utm_term);
	}
}

setUTMParameters();


var utm_params = [
	'utm_source', 
	'utm_medium', 
	'utm_term', 
	'utm_campaign', 
	'utm_content'
  ];

var formPageFieldPrefix = '.hbspt-form .hs_page_';
var formFieldSufix = ' input';
	  
window.addEventListener('message', event => {
  if(event.data.type === 'hsFormCallback' && event.data.eventName === 'onFormReady') {
	  
      let formUTMFieldPrefix = "#hsForm_"+event.data.id+' .hs_lt_';
      utm_params.forEach(function(param){
        if(jQuery(formUTMFieldPrefix+param+formFieldSufix)){
          jQuery(formUTMFieldPrefix+param+formFieldSufix).val(getAttributionCookie(param)).change();
        }
      });
      
      if(jQuery(formPageFieldPrefix+"title"+formFieldSufix))
      jQuery(formPageFieldPrefix+"title"+formFieldSufix).val(document.title).change();
      
      if(document.querySelector(formPageFieldPrefix+"url"+formFieldSufix))
      jQuery(formPageFieldPrefix+"url"+formFieldSufix).val(window.location.href).change();
  }
});


function hubspotFormSubmitHandlerfunction($form) {
    let formUTMFieldPrefix = '.hs_lt_';    
    utm_params.forEach(function(param){
        if($form.find(formUTMFieldPrefix+param+formFieldSufix)){
            $form.find(formUTMFieldPrefix+param+formFieldSufix).val(getAttributionCookie(param));
        }
    });
    
    if(jQuery(formPageFieldPrefix+"title"+formFieldSufix))
      jQuery(formPageFieldPrefix+"title"+formFieldSufix).val(document.title).change();
      
      if(document.querySelector(formPageFieldPrefix+"url"+formFieldSufix))
      jQuery(formPageFieldPrefix+"url"+formFieldSufix).val(window.location.href).change();
}