package com.baselet.diagram.command;

import java.awt.Point;
import java.util.Vector;

import com.baselet.control.ClipBoard;
import com.baselet.control.Constants;
import com.baselet.diagram.DiagramHandler;
import com.baselet.element.GridElement;

public class Cut extends Command {

	private Vector<GridElement> entities;
	private Point origin;

	public Cut() {

	}

	@Override
	public void execute(DiagramHandler handler) {

		super.execute(handler);
		if (this.entities == null) {
			this.entities = new Vector<GridElement>();
			this.entities.addAll(handler.getDrawPanel().getSelector().getSelectedEntities());
		}

		if (this.entities.isEmpty()) return;

		// AB: clipboard copy scales the entities to 100%, so we don't have to do it manually
		ClipBoard.getInstance().copy(this.entities, handler);
		(new RemoveElement(this.entities, false)).execute(handler);

		// AB: copy origin and zoom it to 100%
		origin = handler.getDrawPanel().getOriginAtDefaultZoom();

		handler.getDrawPanel().updatePanelAndScrollbars();
	}

	@Override
	public void undo(DiagramHandler handler) {
		super.undo(handler);

		// We must zoom to the defaultGridsize before execution
		int oldZoom = handler.getGridSize();
		handler.setGridAndZoom(Constants.DEFAULTGRIDSIZE, false);

		int offsetX = origin.x - handler.getDrawPanel().getOriginAtDefaultZoom().x;
		int offsetY = origin.y - handler.getDrawPanel().getOriginAtDefaultZoom().y;

		for (GridElement e : this.entities) {
			(new AddElement(e, handler.realignToGrid(true, e.getLocation().x + offsetX), handler.realignToGrid(true, e.getLocation().y + offsetY))).execute(handler);
		}
		handler.getDrawPanel().repaint();

		// And zoom back to the oldGridsize after execution
		handler.setGridAndZoom(oldZoom, false);

		handler.getDrawPanel().getSelector().select(entities); // undo selects the cutted entities

		handler.getDrawPanel().updatePanelAndScrollbars();
	}
}
