package mightypork.gamecore.input.events;


import mightypork.utils.eventbus.BusEvent;
import mightypork.utils.eventbus.events.flags.NotLoggedEvent;
import mightypork.utils.math.constraints.rect.RectBound;
import mightypork.utils.math.constraints.vect.Vect;
import mightypork.utils.math.constraints.vect.VectConst;


/**
 * Mouse button / wheel event triggered
 * 
 * @author Ondřej Hruška (MightyPork)
 */
@NotLoggedEvent
public class MouseButtonEvent extends BusEvent<MouseButtonHandler> {
	
	public static final int BUTTON_LEFT = 0;
	public static final int BUTTON_MIDDLE = 1;
	public static final int BUTTON_RIGHT = 2;
	
	private final int button;
	private final int wheeld;
	private final VectConst pos;
	private final boolean down;
	
	
	/**
	 * Mouse button event
	 * 
	 * @param pos event position
	 * @param button button id
	 * @param down button pressed
	 * @param wheeld wheel change
	 */
	public MouseButtonEvent(Vect pos, int button, boolean down, int wheeld) {
		this.button = button;
		this.down = down;
		this.pos = pos.freeze();
		this.wheeld = wheeld;
	}
	
	
	/**
	 * @return true if the event was caused by a button state change
	 */
	public boolean isButtonEvent()
	{
		return button != -1;
	}
	
	
	/**
	 * @return true if the event was caused by a wheel change
	 */
	public boolean isWheelEvent()
	{
		return wheeld != 0;
	}
	
	
	/**
	 * @return button id or -1 if none was pressed
	 */
	public int getButton()
	{
		return button;
	}
	
	
	/**
	 * @return number of steps the wheel changed since last event
	 */
	public int getWheelDelta()
	{
		return wheeld;
	}
	
	
	/**
	 * @return mouse position when the event occurred
	 */
	public VectConst getPos()
	{
		return pos;
	}
	
	
	/**
	 * @return true if button was just pressed
	 */
	public boolean isDown()
	{
		return button != -1 && down;
	}
	
	
	/**
	 * @return true if button was just released
	 */
	public boolean isUp()
	{
		return button != -1 && !down;
	}
	
	
	/**
	 * Get if event happened over a rect
	 * 
	 * @param rect rect region
	 * @return was over
	 */
	public boolean isOver(RectBound rect)
	{
		return rect.getRect().contains(pos);
	}
	
	
	@Override
	public void handleBy(MouseButtonHandler handler)
	{
		handler.receive(this);
	}
}