package ei.game.input;

import java.util.ArrayList;

import ei.engine.LWJGLGameWindow;
import ei.engine.input.MouseInput;
import ei.engine.math.Vector2f;
import ei.engine.math.Vector2i;
import ei.engine.math.Vector4f;
import ei.engine.scene.Box;
import ei.engine.scene.Sprite;
import ei.engine.texture.Texture;
import ei.engine.util.MultiPrintStream;
import ei.game.scene.GameEntity;
import ei.game.scene.Map;

public class InGameMouseInput extends MouseInput{
	private static final int CAMERA_MOVE_BORDER = 40;
	private static final float CAMERA_MOVE_SPEED = 6.0f;
	
	private ArrayList<GameEntity> selected;
	private Vector2f leftKlickPos;
	private Box markingBox;
	
	private Map map;
	
	public InGameMouseInput(Map map) {
		super("InGameMouseInput","data/cursor/cursor.png");
		this.map = map;
		this.selected = new ArrayList<GameEntity>();
		
		//inits the mouse texture
		Sprite s = getSprite();		
		s.setSize(new Vector2f(38,50));
		
		Texture tex = new Texture();
		tex.setColor(new Vector4f(0.5f, 1.0f, 0.5f,1));
		markingBox = new Box("MarkingBob", tex);
	}
	
	@Override
	public void mouseUpdate(int x, int y, int w) {
		// mov cam to the left
		if(x < CAMERA_MOVE_BORDER){
			LWJGLGameWindow.getCamera().getLocation().add(-CAMERA_MOVE_SPEED,0,0);
		}
		// mov cam to the right
		if(x > LWJGLGameWindow.getWidth()-CAMERA_MOVE_BORDER){
			LWJGLGameWindow.getCamera().getLocation().add(CAMERA_MOVE_SPEED,0,0);
		}
		// mov cam upp
		if(y < CAMERA_MOVE_BORDER){
			LWJGLGameWindow.getCamera().getLocation().add(0,-CAMERA_MOVE_SPEED,0);
		}
		// mov cam down
		if(y > LWJGLGameWindow.getHeight()-CAMERA_MOVE_BORDER){
			LWJGLGameWindow.getCamera().getLocation().add(0,CAMERA_MOVE_SPEED,0);
		}
		
		// The 
		if(leftKlickPos != null){
			System.out.println("leftclick 2");
			markingBox.setSize(new Vector2f(
					Math.abs(leftKlickPos.getX()-(LWJGLGameWindow.getCamera().getLocation().getX()+x)),
					Math.abs(leftKlickPos.getY()-(LWJGLGameWindow.getCamera().getLocation().getY()+y))));
			getNode().add(markingBox);
		}
	}
	
	@Override
	public void mouseDown(int event,int x, int y) {
		Vector2i pos = Map.getPosByPixel(
				LWJGLGameWindow.getCamera().getLocation().getX()+x,
				LWJGLGameWindow.getCamera().getLocation().getY()+y);

		//selecting unit.
		if(event==LEFT_MOUSE_BUTTON){
			//map.printAllUnits();
			if(leftKlickPos == null){
				System.out.println("leftclick 1");
				leftKlickPos = new Vector2f(x,y);
				markingBox.setLocation(leftKlickPos);
			}
		}
		//unit action.
		else if(event==RIGHT_MOUSE_BUTTON) {
			if(!map.isPosEmpty(pos.getX(), pos.getY())){
				for(int i=0; i<selected.size(); i++) {
					selected.get(i).attack(new Vector2i(pos.getX(), pos.getY()));
				}
			}
			else{
				//MultiPrintStream.out.println("Moving: "+pos.getX()+", "+pos.getY());
				for(int i=0; i<selected.size() ;i++){
					selected.get(i).move(pos.getX(),pos.getY());
				}
			}
		}
	}

	@Override
	public void mouseUp(int event,int x, int y) {
		Vector2i pos = Map.getPosByPixel(
				LWJGLGameWindow.getCamera().getLocation().getX()+x,
				LWJGLGameWindow.getCamera().getLocation().getY()+y);
		
		if(leftKlickPos != null){
			deselectAllUnits();
			selectUnits(Map.getPosByPixel(leftKlickPos.getX(), leftKlickPos.getY()),pos);
			leftKlickPos = null;
			getNode().remove(markingBox);
		}
	}
	
	public void selectUnits(Vector2i startPos, Vector2i stopPos){
		MultiPrintStream.out.println("Selecting: "+startPos.getX()+", "+startPos.getY()+" to "+stopPos.getX()+", "+stopPos.getY());
		for(int i=Math.min(startPos.getX(), stopPos.getX()); i<Math.max(startPos.getX(), stopPos.getX()) ;i++){
			for(int j=Math.min(startPos.getY(), stopPos.getY()); j<Math.max(startPos.getY(), stopPos.getY()) ;j++){
				if(!map.isPosEmpty(i, j)){
					selected.add(map.getPos(i, j));
					map.getPos(i, j).setSelected(true);	
				}
			}
		}
	}
	
	/**
	 * Deselects all the units
	 *
	 */
	public void deselectAllUnits(){
		for(int i=0; i<selected.size(); i++) {
			selected.get(i).setSelected(false);
		}
		selected.clear();
	}

}