var courses;
// get the courses from storage
chrome.storage.sync.get('savedCourses', function(data) {
	//find, build, and show the messages for the conflicts in the saved courses
	chrome.runtime.sendMessage({command: "checkConflicts"}, function(response) {
		var isConflicted = [];
		if(response.isConflict){
			var between = response.between;
			var text = "";
			for(var i = 0; i<between.length;i++){
				text+="CONFLICT: "+ getSimpleName(between[i][0].coursename,between[i][0].unique) + " and "+getSimpleName(between[i][1].coursename,between[i][1].unique);
				isConflicted.push(between[i][0].unique);
				isConflicted.push(between[i][1].unique);
				if(i != between.length-1){
					text+= "<br>";
				}
			}
			$("#courseList").prepend("<p style='font-size:small; font-weight:bold; color:red; margin:5px 5px 5px 10px'>"+text+"</>");
		} 
	});
	courses = data.savedCourses;
	if(courses.length != 0){
		$("#empty").hide();
	}
	// build and append the course list element
	for(var i = 0; i<courses.length;i++){
		var color;
		status = courses[i].status;
		if(status.includes("open")){
			color = "#4CAF50";
		}
		else if(status.includes("waitlisted")){
			color = "#FF9800"
		}
		else if(status.includes("closed") || status.includes("cancelled")){
			color = "#F44336";
		}
		var department = courses[i].coursename.substring(0,courses[i].coursename.search(/\d/)-2);
		var course_nbr = courses[i].coursename.substring(courses[i].coursename.search(/\d/),courses[i].coursename.indexOf(" ",courses[i].coursename.search(/\d/)));
		var profname = courses[i].profname.substring(0,1)+courses[i].profname.substring(1).toLowerCase();
		var listhtml = "<li id='"+i+"'style='padding: 0px 5px 5px 5px; overflow-y: auto;max-height:400px;'><div class='card'><div class='container' style='background:"+color+"''><h4 class='truncate' style='color:white;margin:5px; font-size:large;'><b>"+department + " "+course_nbr+"<span style='font-size:medium'>"+" with </span><span style='font-size:medium'>"+profname+" ("+courses[i].unique+")"+"</span></b></h4></div></div><div id='moreInfo' style='display: none;'><p style='font-weight:bold;padding:10px;margin:0px;font-size:small;background-color:#FFCDD2;'>"+makeLine(i)+"</p><div id='infoButtons' style='border-radius:0px;'><button class='matbut' id='listRemove'style='float:right;background:#F44336; margin:5px;'>Remove</button><button class='matbut' id='listMoreInfo' style='float:right;background:#2196F3; margin:5px;'>More Info</button></div></div></li>";
		$("#courseList").append(listhtml);
	}
});

/* prettify the name for the conflict messages*/
function getSimpleName(coursename, unique){
	var department = coursename.substring(0,coursename.search(/\d/)-2);
	var course_nbr = coursename.substring(coursename.search(/\d/),coursename.indexOf(" ",coursename.search(/\d/)));
	return department+" "+course_nbr+" ("+unique+")";
}

/* Update the conflict messages */
function updateConflicts(){
	chrome.runtime.sendMessage({command: "checkConflicts"}, function(response) {
		var isConflicted = [];
		if(response.isConflict){
			var between = response.between;
			var text = "";
			for(var i = 0; i<between.length;i++){
				text+="Conflict between: "+ getSimpleName(between[i][0].coursename,between[i][0].unique) + " and "+getSimpleName(between[i][1].coursename,between[i][1].unique);
				isConflicted.push(between[i][0].unique);
				isConflicted.push(between[i][1].unique);
				if(i != between.length-1){
					text+= "<br>";
				}
			}
			$("#courseList").prepend("<p style='font-size:small; font-weight:bold; color:red; margin:5px;'>"+text+"</>");
		} 
	});
}

/* Handle the button clicks */
$(document).ready(function() {
	$("#courseList li").click(function(){
		$(this).find("#listMoreInfo").click(function(){
			window.open(courses[$(this).closest("li").attr("id")].link);
		});
		/* clear the conflict messages, then remove the course and updateConflicts. update the tabs*/
		$(this).find("#listRemove").click(function(){
			$(thisForm).closest("ul").find("> p").remove();
			var thisForm = this;
			chrome.runtime.sendMessage({command: "courseStorage",course: courses[$(thisForm).closest("li").attr("id")], action:"remove"}, function(response) {
				$(thisForm).closest("li").fadeOut(200);
				if($(thisForm).closest("ul").children(':visible').length===1){
					$("#courseList").fadeOut(300,function(){
						$("#empty").fadeIn(200);
					});	
				}
				updateConflicts();
				chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
					chrome.tabs.sendMessage(tabs[0].id, {command: "update"});
				});
			});
		});
		/* Show the times popout and more info options*/
		if($(this).find("#moreInfo").is(":hidden")){
			$(this).find("#moreInfo").fadeIn(200);
		}
		else{
			$(this).find("#moreInfo").fadeOut(200);
		}
	});
	$("#clear").click(function(){
		clear();
	});
	$("#schedule").click(function(){
		chrome.tabs.create({ 'url': 'https://registrar.utexas.edu/schedules'});
	});
	$("#open").click(function(){
		chrome.tabs.create({ 'url': 'chrome://extensions/?options=' + chrome.runtime.id });
	});
});

/* convert from the dtarr and maek the time lines*/
function makeLine(index){
	var datetimearr = courses[index].datetimearr;
	//converted times back
	var dtmap = new Map([]);
	for(var i = 0; i<datetimearr.length;i++){
		datetimearr[i][1][0] = moment(datetimearr[i][1][0], ["HH:mm"]).format("h:mm A");
		datetimearr[i][1][1] = moment(datetimearr[i][1][1], ["HH:mm"]).format("h:mm A");
	}
	for(var i = 0; i<datetimearr.length;i++){
		if(dtmap.has(String(datetimearr[i][1]))){
			dtmap.set(String(datetimearr[i][1]),dtmap.get(String(datetimearr[i][1]))+datetimearr[i][0]);
		}
		else{
			dtmap.set(String(datetimearr[i][1]),datetimearr[i][0]);
		}
	}
	var output="";
	var timearr = Array.from(dtmap.keys());
	var dayarr =  Array.from(dtmap.values());
	for(var i = 0; i<dayarr.length;i++){
		output += "<span style='font-size:medium'>"+dayarr[i]+"</span>: <span style='float:right'>"+timearr[i].split(",")[0]+" to "+timearr[i].split(",")[1]+"</span><br>";
	}
	return output;
}


/*Clear the list and the storage of courses*/
function clear(){
	chrome.storage.sync.set({savedCourses: []});
	chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
		chrome.tabs.sendMessage(tabs[0].id, {command: "update"});
	});
	console.log("cleared");
	$("#courseList").fadeOut(300,function(){
		$("#empty").fadeIn(200);
	});	
}