//In Utils:
function RandMod(mod)
{
	return int(rand() * 0.99 * mod);
}



var shared board = new object();
var shared size = 10;
var shared colors = new object( new fcolor(1,0,0), new fcolor(0,1,0), new fcolor(0,0,1) );
var shared numcolors = colors.Length;


//Main function:

function main()
{
	NewBoard();

	branch
	{	
		while(true)
		{
			sleepon mouseup_left(x,y);
			x = int(x/size);
			y = int(y/size);
			var color = board[y][x].color;
			PlayTurn(color);
		}				
	}
}

var shared playstack;
var oldcolor, newcolor;

function IsValid(x,y)
{
	if ((x<0)||(x>=size))
		return false;
	if ((y<0)||(y>=size))
		return false;
	return true;
}

function PushTile(x,y)
{
	if (IsValid(x,y))
	{
		for (var i=0; i<playstack.Length; i++)
		{
			if ((playstack[i].x == x) && (playstack[i].y == x))
				return;
		}

		playstack[playstack.Length] = board[x][y];
	}

}

function ScaleColor(a, b, t)
{
	var ans = new fcolor();
	var ot = 1-t;
	ans.red = a.red*ot + b.red*t;
	ans.green = a.green*ot + b.green*t;
	ans.blue = a.blue*ot + b.blue*t;
	return ans;
}

function ChangeColor(tile, newcolor)
{
	var oldc = tile.color;
	tile.color = newcolor;
	branch
	{
		oldc = colors[oldc];
		newcolor = colors[newcolor];
		var scale = new TimeScale(0,1,1000);
		while (scale.Going)
		{
			tile.view.Color = ScaleColor(oldc, newcolor, scale.Value);
			sleepframe();
		}
	}
}

function PlayTurn(color)
{
	var start;
	if (board.turn==0)
		start = new fpnt(0,0);
	else
		start = new fpnt(size-1, size-1);
	oldcolor = board[start.x][start.y].color;
	newcolor = color;
	if (oldcolor == newcolor)
		return;

	playstack = new object();
	playstack[0] = board[start.x][start.y];

	for (var i=0; i<playstack.Length; i++)
	{
		var cur = playstack[i];
		if ((cur.color == oldcolor) || (cur.color == newcolor))
		{
			if (cur.color == oldcolor)
				ChangeColor(cur, newcolor);

			PushTile(cur.x-1, cur.y);
			PushTile(cur.x, cur.y+1);
			PushTile(cur.x+1, cur.y);
			PushTile(cur.x, cur.y-1);
		}
	}

	board.turn = (board.turn + 1)%2;
}


function NewGame()
{
	board.view = new CompNode();
	board.turn = 0;

	for (var x=0; x<10; x++)
	{
		board[x] = new object();

		for (var y=0; y<10; y++)
		{
			var nb = new object();
			nb.x = x; nb.y = y;
			nb.color = RandMod( numcolors );
			nb.view = new Block();
			nb.view.Parent = board.view;
			nb.view.Pos = new fpnt(5+x*10, 5+y*10);
			nb.view.Color = colors[ nb.color ];

			board[x][r] = nb;
		}
	}
}