load($SCRIPT_DIR + "/drone.js");
//
// constructs a medieval fort
//
function fort(side, height, drone)
{
	 if (typeof drone == "undefined")
		  drone = new Drone();
	 if (typeof side == "undefined")
		  side = 18;
	 if (typeof height == "undefined")
		  height = 6;
	 if (height < 4 || side < 10)
		  throw new java.lang.RuntimeException("Forts must be at least 9 wide X 4 tall");
	 // make sure side is even
	 if (side%2)
		  side++;
	 var brick = 98;
	 //
	 // build walls.
	 //
	 drone.chkpt('fort').box0(brick,side,height-1,side);
	 //
	 // build turrets
	 //
	 drone.up(height-1);
	 for (i = 0;i <= 3;i++){
		  var turret = [];
		  drone.box(brick) // solid brick corners
				.up().box('50:5').down() // light a torch on each corner
				.fwd(); 
		  turret.push('109:'+ Drone.PLAYER_STAIRS_FACING[drone.dir]);
		  turret.push('109:'+ Drone.PLAYER_STAIRS_FACING[(drone.dir+2)%4]);
		  drone.box(turret,1,1,side-2).fwd(side-2).turn();
	 }
	 //
	 // build battlements
	 //
	 drone.move('fort');
	 drone.up(height-2).fwd().right().box('44:5',side-2,1,side-2);
	 var battlementWidth = 3;
	 if (side <= 12)
		  battlementWidth = 2;
	 
	 drone.fwd(battlementWidth).right(battlementWidth)
		  .box(0,side-((1+battlementWidth)*2),1,side-((1+battlementWidth)*2));
	 //
	 // add door
	 //
	 var torch = '50:' + Drone.PLAYER_TORCH_FACING[drone.dir];
	 drone.move('fort').right((side/2)-1).door2() // double doors
		  .back().left().up().box(torch) // left torch
		  .right(3).box(torch); // right torch
	 //
	 // add ladder up to battlements
	 //
	 var ladder = '65:' + Drone.PLAYER_SIGN_FACING[(drone.dir+2)%4];
	 drone.move('fort').right((side/2)-3).fwd(1) // move inside fort
		  .box(ladder, 1,height-1,1);
	 return drone.move('fort');
};