gistfile1.hx

package;
import openfl.display.Sprite;

enum Rotation {
	North;
	East;
	South;
	West;
}

typedef Robo = {
	var x:Int;
	var y:Int;
	var r:Rotation;
}

class Main extends Sprite {

	var robo:Robo;

	var fieldWidth : Int;
	var fieldHeight: Int;

	public function new () {
		super ();
		robo = {x:0,y:0,r:North};
		//trace(robo);
		initGameField(4,4,2,2,North);
		turn("RGLGLGGGGGR");
	}

	function turn(turnString:String) {
		var length = turnString.length;
		var currentRotation = robo.r;
		for (i in 0...length) {
			switch (turnString.charAt(i)) {
				case "L":
					robo.r = turnCounterClockwise();
				case "R":
					robo.r = turnClockwise();
				case "G":
					moveRobo();
			}
		}
		printReport();
	}

	function turnCounterClockwise():Rotation {
		var newRotation = Type.enumIndex(robo.r)-1;
		if (newRotation<0) {
			newRotation=3;
		}
		return Type.createEnumIndex(Rotation,newRotation);
	}

	function turnClockwise():Rotation {
		var newRotation = Type.enumIndex(robo.r)+1;
		if (newRotation>3) {
			newRotation=0;
		}
		return Type.createEnumIndex(Rotation,newRotation);
	}

	function moveRobo() {
		var newX = robo.x;
		var newY = robo.y;
		switch (robo.r) {
			case North:
				newY-=1;
			case East:
				newX+=1;
			case South:
				newY+=1;
			case West:
				newX-=1;
		}
		if (newX<=fieldWidth && newX>=0)
			robo.x = newX;
		if (newY<=fieldHeight && newY>=0)
			robo.y = newY;
	}

	function printReport() {
		trace("Report: "+robo.x+" "+robo.y+" "+robo.r);
	}

	function initGameField(width,height,initXPos,initYPos,initRotation) {
		fieldWidth = width;
		fieldHeight = height;
		robo = {x:initXPos,y:initYPos,r:initRotation};
		trace(robo);
	}
	
}