//record = 1000000
boardSize = 45
xs = 45
ys = boardSize
x = 0
y = 0
oldX = 0
oldY = 0

function NW(x,y) { // press W
	if (y%2 == 0) {
		x -= 1;
		if (x<0){x=0;}
	}
	y -= 1;
	if (y < 0) {y=0;}
	return [x,y]
}

function R(x,y) { // press d
	x += 1;
	if (x>xs - 1) {x=xs - 1;}
	return [x,y]
}

function L(x,y) { // press a
	x -= 1;
	if (x<0) {x = 0;}
	return [x,y]
}

function NE(x,y) { // press E
	if (y%2 == 1) {
		x += 1;
		if (x>xs-1){x=xs-1;}
	}
	y -= 1;
	if (y < 0) {y=0;}
	return [x,y]
}

function SW(x,y) { // press Z
	if (y%2 == 0) {
		x -= 1;
		if (x<0){x=0;}
	}
	y += 1;
	if (y>= ys) {y=ys - 1;}
	return [x,y]
}

function SE(x,y) { // press x
	if (y%2 == 1) {
		x += 1;
		if (x>xs-1){x=xs-1;}
	}
	y += 1;
	if (y>= ys) {y=ys - 1;}
	return [x,y]
}



$(document).ready(
	function(){
		timer = false

		function hex(x,y) {
			index = xs*y+x;
			return document.getElementsByTagName("polygon")[index];
		}

		if (
			(hex(0,1).style.fill=="red")&&(hex(1,0).style.fill=="red")
		) {
			location.reload();
		}
		if (
			(hex(0,2).style.fill=="red")&&(hex(1,1).style.fill=="red")&&(hex(1,0).style.fill=="red")
		) {
			location.reload();
		}
		if (
			(hex(xs-2,ys-1).style.fill=="red")&&(hex(xs-1,ys-2).style.fill=="red")&&(hex(xs-2,ys-2).style.fill=="red")
		) {
			location.reload();
		}
		if (
			(hex(xs-2,ys-1).style.fill=="red")&&(hex(xs-1,ys-3).style.fill=="red")&&(hex(xs-2,ys-2).style.fill=="red")
		) {
			location.reload();
		}
		hex(xs-1,ys-1).title="0";
		if (hex(xs-2,ys-1).style.fill == "green") {
			hex(xs-2,ys-1).title="1";
		}
		for (x=0; x<xs; x++) {
			y = x
			if (hex(x,y).style.fill=="green"){
			hex(x,y).style.fill="orange";
			}
		}
		// Homogenize the field a bit
		for (x=0; x<xs; x++) {
			for (y=0; y<ys; y++) {
				if (
					(hex(NW(x,y)[0],NW(x,y)[1]).style.fill=="red")&&
					(hex(NE(x,y)[0],NE(x,y)[1]).style.fill=="red")&&
					(hex( R(x,y)[0], R(x,y)[1]).style.fill=="red")&&
					(hex( L(x,y)[0], L(x,y)[1]).style.fill=="red")&&
					(hex(SW(x,y)[0],SW(x,y)[1]).style.fill=="red")&&
					(hex(SE(x,y)[0],SE(x,y)[1]).style.fill=="red")
				) {
					hex(x,y).style.fill="red";
				}
			}
		}
		for (x=0; x<xs; x++) {
			for (y=0; y<ys; y++) {
				if (
					(hex(NW(x,y)[0],NW(x,y)[1]).style.fill=="green")&&
					(hex(NE(x,y)[0],NE(x,y)[1]).style.fill=="green")&&
					(hex( R(x,y)[0], R(x,y)[1]).style.fill=="green")&&
					(hex( L(x,y)[0], L(x,y)[1]).style.fill=="green")&&
					(hex(SW(x,y)[0],SW(x,y)[1]).style.fill=="green")&&
					(hex(SE(x,y)[0],SE(x,y)[1]).style.fill=="green")
				) {
					hex(x,y).style.fill="green";
				}
			}
		}
		// Begin reachability
		reachable = [[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]];
		for (x=0; x<xs; x++) {
			for (y=0; y<ys; y++) {
				reachable[x][y] = false;
			}
		}
		reachable[0][0]=true;
		changes = true
		while (changes) {
			changes = false
			for (x=0; x<xs; x++) {
				for (y=0; y<ys; y++) {
					if (
						(hex(x,y).style.fill != "red")
					) {
						if (
							(reachable[NW(x,y)[0]][NW(x,y)[1]])||
							(reachable[NE(x,y)[0]][NE(x,y)[1]])||
							(reachable[ R(x,y)[0]][ R(x,y)[1]])||
							(reachable[ L(x,y)[0]][ L(x,y)[1]])||
							(reachable[SW(x,y)[0]][SW(x,y)[1]])||
							(reachable[SE(x,y)[0]][SE(x,y)[1]])
						) {
							if (!reachable[x][y]) {
								changes = true
							}
							reachable[x][y] = true;

							//alert(x.toString() + ", " + y.toString() + " is reachable!");
						}
					}
				}
			}
		} 
		if (!reachable[xs-1][ys-1]) {
			location.reload();
		}
		// End reachability

		x=0
		y=0
		oldX = 0
		oldY = 0
		hex(xs-1,ys-1).style.fill="black";
		hex(0,0).style.fill="yellow";

		$(document).keypress(
			function(event){
				if (!timer) {
					timer = true
					startTime = new Date().getTime();
				}
				oldX = x;
				oldY = y;
				theKey = String.fromCharCode(event.which);
				if (theKey == "a") {
					[x,y]=L(x,y)
				}
				if (theKey == "d") {
					[x,y]=R(x,y)
				}
				if (theKey == "w") {
					[x,y]=NW(x,y);
				}
				if (theKey == "e") {
					[x,y]=NE(x,y);
				}
				if (theKey == "z") {
					[x,y]=SW(x,y);
				}
				if (theKey == "x") {
					[x,y]=SE(x,y);
				}
				if (
					(hex(x,y).style.fill == "green")
					||
					(hex(x,y).style.fill == "black")
					||
					(hex(x,y).style.fill == "blue")
					||
					(hex(x,y).style.fill == "orange")
				){
					hex(oldX,oldY).style.fill="blue";
					hex(x,y).style.fill = "yellow";
					if (y > 5){
						hex(x,y-5).scrollIntoView(
							{
								behavior: 'smooth'
							}
						);
					}
				} else {
					x = oldX;
					y = oldY;
				};
				$("#coords").html(
					"(" + x.toString() + "," + y.toString() +")"
				);
				if (
					(x==xs - 1) && (y==boardSize - 1)
				) {
					newScore = (new Date().getTime())-startTime;
					//if (newScore < record) {
					//	recordString = " New record!! The old one was " + record.toString();
					//	record = newScore;
					//} else {
					//	recordString = "NOT a new record...The record is still " + record.toString();
					//}
					alert(
						"You did it!\n" + (newScore/1000).toString() + " seconds.\n" //+ recordString
					);
				};
			}
		);
	}
);