package aima.core.environment.wumpusworld;

/**
 * Representation of an Agent's [x,y] position and orientation [up, down, right, or left] within a Wumpus World cave.
 * 
 * @author Federico Baron
 * @author Alessandro Daniele
 * @author Ciaran O'Reilly
 */
public class AgentPosition {
	
	public enum Orientation {
		FACING_NORTH("FacingNorth"),
		FACING_SOUTH("FacingSouth"),
		FACING_EAST("FacingEast"),
		FACING_WEST("FacingWest");
		
		@Override
		public String toString() {
			return name;
		}
		
		private final String name;
		
		Orientation(String name) {
			this.name = name;
		}
	}
	
	private Room room;
	private Orientation orientation;
	
	public AgentPosition(int x, int y, Orientation orientation) {
		this(new Room(x, y), orientation);
	}
	
	public AgentPosition(Room room, Orientation orientation) {
		this.room = room;
		this.orientation = orientation;
	}
	
	public Room getRoom() {
		return room;
	}
	
	public int getX() {
		return room.getX();
	}
	
	public int getY() {
		return room.getY();
	}

	public Orientation getOrientation() {
		return orientation;
	}

	@Override
	public String toString() {
		return room.toString()+"->"+orientation;
	}

	@Override
	public boolean equals(Object obj) {
		if (obj != null && getClass() == obj.getClass()) {
			AgentPosition other = (AgentPosition) obj;
			return (getX() == other.getX()) && (getY() == other.getY())
					&& (orientation == other.getOrientation());
		}
		return false;
	}
	
	@Override
	public int hashCode() {
		int result = 17;
		result = 37 * result + room.hashCode();
		result = 43 * result + orientation.hashCode();
		return result;
	}	
}