function clear_data(){
	console.log("clear_data: running");
	restaurants = null;
	latitude = null;
	longitude = null;
}

//from-logout
document.getElementById("login-link-header").addEventListener("click", async function(){
	if(document.getElementById("login-link-header").textContent == "logout"){
	 console.log("User is logged in");  
	 document.getElementById('logout-modal').style.display='block';
 
	 var status = await send_logout_request();
 
	 if(status == 200){
		console.log("successfully logged out.");
		document.getElementById("sign-up-link-footer").style.display = "block";
		document.getElementById("sign-up-link-sidebar").style.display = "block";
		
		document.getElementById("history-link-footer").style.display = "none";
		document.getElementById("history-link-sidebar").style.display = "none";
	
		//Change the login to logout
		document.getElementById("login-link-footer").textContent = "login";
		document.getElementById("login-link-header").textContent = "login";
		document.getElementById("login-link-sidebar").textContent = "login";
	
		//Make the account link visible.
		document.getElementById("account-link-footer").style.display = "none";
		document.getElementById("account-link-navbar").style.display = "none";
		document.getElementById("account-link-sidebar").style.display = "none";

		document.getElementById("favorites-footer").style.display = "none";
		document.getElementById("likes-footer").style.display = "none";
		document.getElementById("dislikes-footer").style.display = "none";

		document.getElementById("favorites-sidebar").style.display = "none";
		document.getElementById("likes-sidebar").style.display = "none";
		document.getElementById("dislikes-sidebar").style.display = "none";

		document.getElementById("sidebar-menu").style.display = "none";
		document.getElementById("footer-hl1").style.display = "none";
		document.getElementById("footer-hl2").style.display = "none";
		document.getElementById("footer-hl3").style.display = "none";

		document.getElementById("sidebar-hl1").style.display = "none";
		document.getElementById("sidebar-hl2").style.display = "none";
		document.getElementById("sidebar-hl3").style.display = "none";

		localStorage.clear();
		sessionStorage.clear();
		clear_data();
		console.log("cleared all local and session data.");

		try{
			if(sessionStorage.username){
				document.getElementById("favorites-and-likes-input-radio-div").style.display = "block";
				document.getElementById("favorites-and-likes-input-radio-sub").style.display = "none";
			}else{
				document.getElementById("favorites-and-likes-input-radio-div").style.display = "none";
				document.getElementById("favorites-and-likes-input-radio-sub").style.display = "block";
			}
		}catch(e){
			console.error("Could not change the visibility: " + e);
		}

		if(
			(location == "https://restaurnaut.com/profile") ||
			(location == "https://restaurnaut.com/profile/") || 
			(location == "https://restaurnaut.com/profile/history") || 
			(location == "https://restaurnaut.com/profile/history/") || 
			(location == "https://restaurnaut.com/profile/favorites") || 
			(location == "https://restaurnaut.com/profile/favorites/") || 
			(location == "https://restaurnaut.com/profile/likes") || 
			(location == "https://restaurnaut.com/profile/likes/") || 
			(location == "https://restaurnaut.com/profile/dislikes") || 
			(location == "https://restaurnaut.com/profile/dislikes/")
		  ){
			location.reload();
		}
	 }
 
	}
 });
 
 document.getElementById("login-link-footer").addEventListener("click", async function(){
	if(document.getElementById("login-link-footer").textContent == "logout"){
	 console.log("User is logged in");  
	 document.getElementById('logout-modal').style.display='block';
 
	 var status = await send_logout_request();
 
	 if(status == 200){
		document.getElementById("sign-up-link-footer").style.display = "block";
		document.getElementById("sign-up-link-sidebar").style.display = "block";

		document.getElementById("history-link-footer").style.display = "none";
		document.getElementById("history-link-sidebar").style.display = "none";

	   console.log("successfully logged out.");
		restaurnaut_key = null;

	   //Change the login to logout
	   document.getElementById("login-link-footer").textContent = "login";
	   document.getElementById("login-link-header").textContent = "login";
	   document.getElementById("login-link-sidebar").textContent = "login";
 
	   //Make the account link visible.
	   document.getElementById("account-link-footer").style.display = "none";
	   document.getElementById("account-link-navbar").style.display = "none";
	   document.getElementById("account-link-sidebar").style.display = "none";

	   document.getElementById("favorites-footer").style.display = "none";
	   document.getElementById("likes-footer").style.display = "none";
	   document.getElementById("dislikes-footer").style.display = "none";

	   document.getElementById("favorites-sidebar").style.display = "none";
	   document.getElementById("likes-sidebar").style.display = "none";
	   document.getElementById("dislikes-sidebar").style.display = "none";

	   document.getElementById("sidebar-menu").style.display = "none";
	   document.getElementById("footer-hl1").style.display = "none";
	   document.getElementById("footer-hl2").style.display = "none";
	   document.getElementById("footer-hl3").style.display = "none";

	   document.getElementById("sidebar-hl1").style.display = "none";
	   document.getElementById("sidebar-hl2").style.display = "none";
	   document.getElementById("sidebar-hl3").style.display = "none";

	//    document.getElementById("favorites-and-likes-input-radio-div").style.display = "none";
	//    document.getElementById("favorites-and-likes-input-radio-sub").style.display = "block";

	   localStorage.clear();
	   sessionStorage.clear();
	   clear_data();
	   console.log("cleared all local and session data.");

	   try{
		if(sessionStorage.username){
			document.getElementById("favorites-and-likes-input-radio-div").style.display = "block";
			document.getElementById("favorites-and-likes-input-radio-sub").style.display = "none";
		}else{
			document.getElementById("favorites-and-likes-input-radio-div").style.display = "none";
			document.getElementById("favorites-and-likes-input-radio-sub").style.display = "block";
		}
	}catch(e){
		console.error("Could not change the visibility: " + e);
	}

	   		  if(
				(location == "https://restaurnaut.com/profile") ||
				(location == "https://restaurnaut.com/profile/") || 
				(location == "https://restaurnaut.com/profile/history") || 
				(location == "https://restaurnaut.com/profile/history/") || 
				(location == "https://restaurnaut.com/profile/favorites") || 
				(location == "https://restaurnaut.com/profile/favorites/") || 
				(location == "https://restaurnaut.com/profile/likes") || 
				(location == "https://restaurnaut.com/profile/likes/") || 
				(location == "https://restaurnaut.com/profile/dislikes") || 
				(location == "https://restaurnaut.com/profile/dislikes/")
		  	){
				location.reload();
			}
	 }
 
	}
 });

 document.getElementById("login-link-sidebar").addEventListener("click", async function(){
	if(document.getElementById("login-link-sidebar").textContent == "logout"){
	 console.log("User is logged in");  
	 document.getElementById('logout-modal').style.display='block';
 
	 var status = await send_logout_request();
 
	 if(status == 200){
		document.getElementById("sign-up-link-footer").style.display = "block";
		document.getElementById("sign-up-link-sidebar").style.display = "block";

		document.getElementById("history-link-footer").style.display = "none";
		document.getElementById("history-link-sidebar").style.display = "none";

	   console.log("successfully logged out.");
		restaurnaut_key = null;

	   //Change the login to logout
	   document.getElementById("login-link-footer").textContent = "login";
	   document.getElementById("login-link-header").textContent = "login";
	   document.getElementById("login-link-sidebar").textContent = "login";
 
	   //Make the account link visible.
	   document.getElementById("account-link-footer").style.display = "none";
	   document.getElementById("account-link-navbar").style.display = "none";
	   document.getElementById("account-link-sidebar").style.display = "none";

	   document.getElementById("favorites-footer").style.display = "none";
	   document.getElementById("likes-footer").style.display = "none";
	   document.getElementById("dislikes-footer").style.display = "none";

	   document.getElementById("favorites-sidebar").style.display = "none";
	   document.getElementById("likes-sidebar").style.display = "none";
	   document.getElementById("dislikes-sidebar").style.display = "none";

	   document.getElementById("sidebar-menu").style.display = "none";
	   document.getElementById("footer-hl1").style.display = "none";
	   document.getElementById("footer-hl2").style.display = "none";
	   document.getElementById("footer-hl3").style.display = "none";

	   document.getElementById("sidebar-hl1").style.display = "none";
	   document.getElementById("sidebar-hl2").style.display = "none";
	   document.getElementById("sidebar-hl3").style.display = "none";

	   

	//    document.getElementById("favorites-and-likes-input-radio-div").style.display = "none";
	//    document.getElementById("favorites-and-likes-input-radio-sub").style.display = "block";

	   localStorage.clear();
	   sessionStorage.clear();
	   clear_data();
	   console.log("cleared all local and session data.");


	   try{
		if(sessionStorage.username){
			document.getElementById("favorites-and-likes-input-radio-div").style.display = "block";
			document.getElementById("favorites-and-likes-input-radio-sub").style.display = "none";
		}else{
			document.getElementById("favorites-and-likes-input-radio-div").style.display = "none";
			document.getElementById("favorites-and-likes-input-radio-sub").style.display = "block";
		}
	}catch(e){
		console.error("Could not change the visibility: " + e);
	}

	   if(
		(location == "https://restaurnaut.com/profile") ||
		(location == "https://restaurnaut.com/profile/") || 
		(location == "https://restaurnaut.com/profile/history") || 
		(location == "https://restaurnaut.com/profile/history/") || 
		(location == "https://restaurnaut.com/profile/favorites") || 
		(location == "https://restaurnaut.com/profile/favorites/") || 
		(location == "https://restaurnaut.com/profile/likes") || 
		(location == "https://restaurnaut.com/profile/likes/") || 
		(location == "https://restaurnaut.com/profile/dislikes") || 
		(location == "https://restaurnaut.com/profile/dislikes/")
	  ){
		location.reload();
	}
	 }
 
	}
 });
 
 
 function send_logout_request(){
   return new Promise((resolve) => {
	 var xhr = new XMLHttpRequest();
 
	 // Paste your LocationIQ token below.
	 xhr.open('POST', "https://restaurnaut.com/api/v1/user/secure/logout/", true);
	 xhr.send();
	 xhr.onreadystatechange = processRequest;
	 // xhr.addEventListener("readystatechange", processRequest, false);
 
	 function processRequest(e) {
	   if (xhr.readyState == 4 && xhr.status == 200) {
		 var response = JSON.parse(xhr.responseText);
		 
		 console.log("send_logout_request: " + response.message);
		 sessionStorage.clear();
 
		 resolve(xhr.status);						//RESOLVE THE PROMISE
	   }else if(xhr.status == 401){
		 var response = JSON.parse(xhr.responseText);
 
		 console.log("send_logout_request: " + response.message);
	   }else{
		 try{
			 console.log(xhr.status + " message: " + response.message);
		 }catch(exception){
			 console.log("send_logout_request: status = " + xhr.status + "; readyState = " + xhr.readyState);
		 }
	   }
	 }
   });
 }