package ei.game.scene.units;


import java.util.LinkedList;

import ei.engine.math.Vector2f;
import ei.engine.math.Vector2i;
import ei.engine.math.Vector3f;
import ei.engine.scene.Node;
import ei.engine.scene.Sprite;
import ei.game.algo.AStar;
import ei.game.algo.AStarNode;
import ei.game.gamestate.InGameState;
import ei.game.scene.GameEntity;
import ei.game.scene.Map;
import ei.game.scene.weapons.Weapon;

/**
 * The Unit class, handles the units in the game.
 * @author Jesper Lundin
 *
 */
public abstract class Unit extends GameEntity{
	// The texture
	private Node unitNode;
	// The wepon of the unit
	private Weapon weapon;
	// Som temp pos for moving the unit
	private Vector2i oldPos;
	private Vector2f moveTo;
	private LinkedList<AStarNode> path;

	/**
	 * Creates a empty unit
	 * 
	 * @param l The max life of the unit
	 */
	public Unit(int l) {
		super(l);
		unitNode = new Node("unit");
		setPos(0, 0);
	}
	public void setSelected(boolean b) {
		super.setSelected(b);
		if(b) {
			unitNode.add(getSelection());
		}
		else{
			unitNode.remove(getSelection());
		}
	}
	
	/**
	 * Returns the sprite for the unit
	 * 
	 * @return The sprite for the unit
	 */
	public Node getNode(){
		return unitNode;
	}
	/**
	 * Sets the pos of the unit whitout removing it from the old
	 * 
	 * @param x The x pos to move to
	 * @param y The y pos to move to
	 */
	public void setPos(int x, int y) {
		oldPos = new Vector2i(x, y);
		InGameState.getMap().setPos(this, x, y);
		
	}
	
	/**
	 * Moving a unit to the given pos
	 * 
	 * @param x The x pos to move to
	 * @param y The y pos to move to
	 */
	public void move(int x, int y) {
		if(oldPos!=null) {
			InGameState.getMap().removePos(oldPos.getX(), oldPos.getY());
		}
		setPos(x, y);
		path = (LinkedList) new AStar().findPath(new AStarNode(oldPos,null), new AStarNode(new Vector2i(x,y),null));
		moveTo = Map.getPixelByPos((int)x, (int)y);
		oldPos = new Vector2i(x, y);
	}
	
	/**
	 * Updating the unit
	 */
	public void update() {
		if(moveTo!=null) {
			Vector2i moveVect = Map.getPosByPixel(moveTo.getX(), moveTo.getY());
			Vector2i  currentVect = Map.getPosByPixel(unitNode.getLocation().getX(), unitNode.getLocation().getY());
			//System.out.println("going to: "+moveVect);
			//System.out.println("from: "+currentVect);
			Vector3f currentRot = null;
			if(moveVect.getX() < currentVect.getX()) {
				unitNode.get("Tank").setRotation(new Vector3f(0, 0, 90));
				
			}
			if(moveVect.getX() > currentVect.getX()) {
				unitNode.get("Tank").setRotation(new Vector3f(0, 0, -90));
			}
			if(moveVect.getY() < currentVect.getY()) {
				unitNode.get("Tank").setRotation(new Vector3f(0, 0, 180));
			}
			if(moveVect.getY() > currentVect.getY()) {
				unitNode.get("Tank").setRotation(new Vector3f(0, 0, 0));
			}
			//System.out.println(unitNode.get("Tank").getRotation());
			
			if(moveTo.getX() > unitNode.getLocation().getX()) {
				unitNode.getLocation().add(1.5f, 0f, 0f);
			}
			if(moveTo.getX() < unitNode.getLocation().getX()) {
				unitNode.getLocation().add(-1.5f, 0f, 0f);
			}
			if(moveTo.getY() > unitNode.getLocation().getY()) {
				unitNode.getLocation().add(0f, 1.5f, 0f);
			}
			if(moveTo.getY() < unitNode.getLocation().getY()) {
				unitNode.getLocation().add(0f, -1.5f, 0f);
			}
			
			if(moveTo.getX() == unitNode.getLocation().getX() 
					&& moveTo.getY() == unitNode.getLocation().getY()) {
				if(!path.isEmpty()){
					Vector2i temp = path.poll().getPos();
					moveTo = Map.getPixelByPos(temp.getX(), temp.getY());
				}
				else{
					moveTo = null;
				}
			}
		}
	}
}