/*This code was originally based on code by
Husain Limdiyawala(MSc IT DA-IICT)*/



$(document).ready(function () {


});


//Global Variables
var totblocks=0;
var data="";
var currentblock=0;
var position=0;
var lastposition = new Array();
var randomno=0;
var tots= new Array();
var l=0;
var srcsnake=new Array(4);
var destsnake=new Array(4);

var ladsrc = new Array(3);
var laddest = new Array(3);
var quest = new Array(); //available questions along with multiple answers
var COR_answered = new Array(); //record all questions (along with answers) the user responded CORRECTLY
var WRO_answered = new Array(); //record all questions (along with answers) the user responded WRONGLY



//var door = new Array(1)

var user = new Array();

//var pythons = new Array(1);

//Constract table with questions and answers and pick question to display

quest[0]="Spell 1";
quest[1]="one";
quest[2]="two";
quest[3]="three";
quest[4]="Spell 2";
quest[5]="two";
quest[6]="three";
quest[7]="four";
quest[8]="Spell 3";
quest[9]="three";
quest[10]="two";
quest[11]="four";
quest[12]="Spell 4";
quest[13]="four";
quest[14]="three";
quest[15]="one";
z=0;
for (z=0;quest[z]!=null;z++);
allQuest=z/4;


function selectQuest(all)
{
pickOne = Math.floor((Math.random() * all));
return pickOne;
}




//The Below Function will hide all the snakes

function hideAll()
{
	document.getElementById("img1").style.display = "none";
	document.getElementById("img2").style.display = "none";
	document.getElementById("img3").style.display = "none";
	document.getElementById("img4").style.display = "none";
	
	document.getElementById("lad1").style.display = "none";
	document.getElementById("lad2").style.display = "none";
	document.getElementById("lad3").style.display = "none";  
}


//The Below Function will Render The Main Board

function paintBoard(a)
{
	totblocks = (a*a);
	if((a*a) % 2 == 0)
	{	
	currentblock = (a*a) - a + 1;
	 for(j=0;j<(a/2);j++)
	 	{
	 			
			for(i=0;i<a;i++)
				{
						data += "<div class='blocks' id='" + currentblock + "'>" + currentblock + "</div>";
						currentblock++;
				}
						currentblock -=  (a+1);
						
				for(i=0;i<a;i++)
				{
				data += "<div id='" + currentblock + "' class ='blocks'>" + currentblock + "</div>";
				currentblock--;
				}
				currentblock -= (a-1);
		}
	}
	else
	{
	
			currentblock = (a*a);
			for(j=0;j<(a/2);j++)	
	 	{
	 		
	 	
			for(i=0;i<a;i++)
				{
						data += "<div class='blocks' id='" + currentblock + "'>" + currentblock + "</div>";
						currentblock--;
				}
						
						currentblock -=  (a-1);
						
				if(currentblock < 2)
						break;		
	
				for(i=0;i<a;i++)
				{
				data += "<div id='" + currentblock + "' class ='blocks'>" + currentblock + "</div>";
				currentblock++;
				}
				currentblock -=  (a+1);
		}
	}
	document.getElementById("cont").style.width = (a*52+52) + "px"


	document.getElementById("cont").innerHTML = data;
	$("#cont").slideDown("slow");
	$("#cont").effect("shake",3000);
	$("img:hidden").fadeIn(5000);

	if(a == 6)
	{
	
	
	registerSnake(158,196,"img1",14,3,0);
	registerSnake(62,183,"img2",27,24,1);
	registerSnake(175,18,"img3",18,4,2);
	registerSnake(10,45,"img4",32,23,3);
	
	registerLadder(27,132,"lad1",28,34,0);
	registerLadder(90,22,"lad2",19,30,1);
	registerLadder(179,137,"lad3",2,16,2);
	
	//registerDoor("5",5,0);
	//registerDoor("21",21,1)
	
	//registerPython("15",15,0)
	}
	
	
	else if(a == 8)
	{
	
	
	registerSnake(300,380,"img1",44,29,0);
	registerSnake(180,550,"img2",51,46,1);
	registerSnake(290,50,"img3",41,40,2);
	registerSnake(500,280,"img4",27,22,3);
	
	registerLadder(350,515,"lad1",19,35,0);
	registerLadder(180,230,"lad2",43,54,1);
	registerLadder(80,350,"lad3",53,60,2);
	
	//registerDoor("14",14,0);
	//registerDoor("26",26,1)
	
	//registerPython("32",32,0)
	}
	

} 

//The below Function will simulate throwing of a dice

function throwDice(i)
{
	
	randomno = Math.floor((Math.random() * 6)) + 1;
	document.getElementById("diceimg").src = "images/dice_" + randomno + ".PNG";
	document.getElementById("diceimg").style.display = "block";	
	if(lastposition[i]>0)
	{
	document.getElementById(lastposition[i]).style.background = "url(images/square52.png)";
	
	}
	tots[i] += randomno;
	
	if(totblocks - tots[i] >= 0) 
	{
	
	lastposition[i] = tots[i];
	document.getElementById(tots[i]).style.background = "url(images/pawn1.png)";
	}
	else
	{
	
	tots[i] -= randomno;
	document.getElementById(tots[i]).style.background = "url(images/pawn1.png)";
	}
	
}

//The below Function Checks The Snake Biting for a user

function snakescheck(k)
{
	i=0;
	
	for(i=0;i<=srcsnake.length;i++)
	{

		if(srcsnake[i] == tots[k])
		{
			alert("Ωχ! Σε τσίμπησε φίδι στο τετράγωνο " + srcsnake[i] + " και θα πρέπει να γυρίσεις στο τετράγωνο " + destsnake[i] + ", εκτός κι αν απαντήσεις σωστά στην ερώτηση που ακολουθεί.");
			document.getElementById(destsnake[i]).style.background = "url(images/pawn1.png)";
			document.getElementById(tots[k]).style.background = "url(images/square52.png)";
			lastposition[k] = destsnake[i];
			tots[k] = destsnake[i];
			break;
		}
	}
	
	if(!checkWin(k))
		alert("???d?se?!S???a??t???a!");
}

//The below function checks the ladders for a user

 function laddercheck(k)
{
	i=0;

	for(i=0;i<=ladsrc.length;i++)
	{
			
		if(ladsrc[i] == tots[k])
		{
			alert("Υπάρχει μια σκάλα στο τετράγωνο " + ladsrc[i] + " και θα σας οδηγήσει κατευθείαν στο τετράγωνο " + laddest[i] +"αν απαντήσεις σωστά στην ερώτηση που ακολουθεί.");
			document.getElementById(laddest[i]).style.background = "url(images/pawn1.png)";
			document.getElementById(tots[k]).style.background = "url(images/square52.png)";
			lastposition[k] = laddest[i];
			tots[k] = laddest[i];
			break;
		}
	}
	if(!checkWin(k))
		alert("You have won!");
}

//The below function checks the existence of doors 

/*function doorcheck(k)
{
	i=0;
	
	for(i=0;i<=door.length;i++)
	{
			
		if(door[i] == tots[k])
		{
	
			
			var randomdoor = Math.floor((Math.random() * totblocks)) + 1;
			alert("Magic Door Entered!! You are redirected to " + randomdoor);
			document.getElementById(randomdoor).style.background = "url(images/pawn.png) #000000";
			document.getElementById(tots[k]).style.background = "url(images/door.png) #000000";
			lastposition[k] = randomdoor;
			tots[k] = randomdoor;
		
		}
	}
	if(!checkWin(k))
		alert("You Have Won!!");
}  */

//The below Function checks for pythons

function pythoncheck(k)
{
	i=0;
	
	for(i=0;i<pythons.length;i++)
	{
			
		if(pythons[i] == tots[k])
		{
	
			
			alert("You have been eaten up by a python.Your game is over");
			document.getElementById(tots[k]).style.background = "url(images/csnake.gif) #000000";
			lastposition[k] = null;
			tots[k] = null;
			break;
		}
	}
	
}  

//The below function will register a snake

function registerSnake(tp,lft,dv,src,dest,i)
{
	document.getElementById(dv).style.top = tp + "px";
	document.getElementById(dv).style.left = lft + "px";
	srcsnake[i] = src;
	destsnake[i] = dest;
}

//The below function will register a ladder.

function registerLadder(tp,lft,dv,src,dest,i)
{
	document.getElementById(dv).style.top = tp + "px";
	document.getElementById(dv).style.left = lft + "px";
	ladsrc[i] = src;
	laddest[i] = dest;
}

//The below function will register a door.

/*function registerDoor(dv,srcc,i)
{
	document.getElementById(dv).style.background = "url(images/door.png) #000000";
	door[i] = srcc;
	
}

//The below function will register a python.
function registerPython(dv,srcc,i)
{
	document.getElementById(dv).style.background = "url(images/csnake.gif) #000000";
	pythons[i] = srcc;
	
}
*/


//The below function checks the change in the boardtype selection combobox

function selectBoard()
{
totblocks=0;
data="";
currentblock=0;
position=0;

hideAll();
if(document.getElementById("boardtype").value != null)
{
	paintBoard(parseInt(document.getElementById("boardtype").value));
}
} 

//The below function checks the change in the player selection combobox

function selectPlayer()
{

	if(document.getElementById("players").value != null)
	{
		
		user[document.getElementById("players").value-1] = 0;
		tots[document.getElementById("players").value-1] = 0;
		lastposition[document.getElementById("players").value-1] = 0;
		for(var j=0;j < lastposition.length;j++)
		{
		lastposition[j] = 0;
		tots[j] = 0;
		}
		
		
	}
}

//The below function starts the play

function play()
{
	if(tots[l] != null)
	{
//...&&(quest[0]!=NULL)
	disableField();				
				document.getElementById("status").innerHTML = "<ul class='nodis'><li>O Paiktis " + (l+1) + " </li><li>brisketai sto tetragwno " + tots[l] + "</li><li></li></ul>"; 
//				
				Question();
				document.getElementById("status").innerHTML = "<ul class='nodis'><li>O Paiktis " + (l+1) + " </li><li>vrisketai sto tetragwno " + tots[l] + "</li></ul>";
	}
	else
		document.getElementById("status").innerHTML = "<ul class='nodis'><li>Molis exases...</li></ul>";
		
		if(l == lastposition.length-1)
			l = 0;
		else
			l++;
	

}

//The below function regulates the play

function doit(i)
{

		throwDice(i);
		
		if(checkWin(i))
		{
		
		//doorcheck(i);
		snakescheck(i);
		laddercheck(i);
		//pythoncheck(i);
		}
		else
		alert("ÏëïêëÞñùóåò ôçí ðßóôá, óõã÷áñçôÞñéá!!!");
}

//The below function checks whether the player has won or not

function checkWin(i)
{
	if(tots[i] == totblocks)
		return false;
		else
		return true;
		
}

//The below function will disable both the combobox 

function disableField()
{
	document.getElementById("players").disabled = "disabled";
	document.getElementById("boardtype").disabled = "disabled";
	
}

function Question()
{
	picked=selectQuest(allQuest);
	alert("Randomly selected number:" +picked);
	Q1=prompt(quest[picked*4],"Απάντηση");
	if (Q1==quest[picked*4+1])
		{
			alert("Σωστά!")
			doit(l);
			
			COR_answered.concat(quest.splice(picked*4,4)); 
			}
	else
	{
		alert("Η απάντηση δεν ήταν σωστή. Χάνεις τη σειρά σου για αυτό το γύρο!")
		//document.getElementById("playbtn").disabled = "disabled";
		WRO_answered.concat(quest.splice(picked*4,4)); 
		}
	//remove question and answers from available questions - (thus not allowing to have a Repeated question) ---XOXOXO
	allQuest--;
		}