package org.simantics.plant3d.actions;

import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;

import javax.vecmath.Point3d;
import javax.vecmath.Vector3d;

import org.simantics.g3d.math.MathTools;
import org.simantics.g3d.math.Ray;
import org.simantics.g3d.scenegraph.IG3DNode;
import org.simantics.g3d.vtk.action.TranslateAction;
import org.simantics.g3d.vtk.common.InteractiveVtkPanel;
import org.simantics.g3d.vtk.common.VTKNodeMap;
import org.simantics.g3d.vtk.utils.vtkUtil;
import org.simantics.plant3d.Activator;
import org.simantics.plant3d.scenegraph.InlineComponent;
import org.simantics.plant3d.scenegraph.PipelineComponent;
import org.simantics.plant3d.scenegraph.controlpoint.PipeControlPoint.Direction;

public class TranslateInlineAction extends TranslateAction{
	
	private Vector3d s;
	private Vector3d e;
	private Vector3d dir;

	public TranslateInlineAction(InteractiveVtkPanel panel, VTKNodeMap nodeMap) {
		super(panel, nodeMap);
		setImageDescriptor(Activator.imageDescriptorFromPlugin("com.famfamfam.silk", "icons/arrow_refresh.png"));
	}
	
	@Override
	public void setNode(IG3DNode node) {
		super.setNode(node);
		if (node instanceof InlineComponent) {
			InlineComponent comp = (InlineComponent)node;
			if (comp.isVariableLength()) {
				setEnabled(false);
			} else {
				setEnabled(true);
			
				PipelineComponent prev = comp.getPrevious();
				PipelineComponent next = comp.getNext();
				if (prev == null || next == null) {
					// TODO : we should support open ended translation (when translated component is the first or last of the run).
					setEnabled(false);
					return;
				}
				if (prev.getControlPoint().isInline() && !prev.getControlPoint().isFixed())
					prev = prev.getPrevious();
				if (next.getControlPoint().isInline() && !next.getControlPoint().isFixed()) {
					next = next.getNext();
				}
				Point3d ns = new Point3d();
				Point3d ne = new Point3d();
				Point3d ps = new Point3d();
				Point3d pe = new Point3d();
				next.getControlPointEnds(ns, ne);
				prev.getControlPointEnds(ps, pe);
				dir = comp.getControlPoint().getPathLegDirection(Direction.NEXT);
				dir.normalize();
				// We may have offsets in the path leg, hence we have to project the coordinates.
				Vector3d wp = node.getWorldPosition();
				s = MathTools.closestPointOnStraight(pe, wp, dir);
				e = MathTools.closestPointOnStraight(ns, wp, dir);
				// Remove component's own space from end points to get actual movement range
				double l = comp.getControlPoint().getInlineLength();
				Vector3d ld = new Vector3d(dir);
				ld.scale(l);
				s.add(ld);
				e.sub(ld);
			}
		} else {
			setEnabled(false);
		}
	}
	
	@Override
	public void keyPressed(KeyEvent e) {
		if (e.getKeyCode() == KeyEvent.VK_ESCAPE)
			panel.useDefaultAction();
		if (valid)
			return;
		
		update();
	}
	
	@Override
	public void setWorldCoord(boolean b) {
		
	}
	
	@Override
	public void mouseDragged(MouseEvent e) {
		if ((e.getModifiersEx() & MouseEvent.BUTTON1_DOWN_MASK) > 0 && valid) { 
			
			Vector3d translate = getTranslate(e.getX(), e.getY(), prevTranslate);
			//System.out.println("translate " + translate);
			if (translate == null)
				return;
			//boolean step = ((e.getModifiers() & MouseEvent.CTRL_MASK) > 0);
			Vector3d pos = new Vector3d(node.getWorldPosition());
			//pos.add(translate);
			pos.set(translate);
			//pos = constaints(pos, step);
			setWorldPos(pos);
			
			//mapping.rangeModified(node);
			
			//nodeMap.modified(node);
			update();
		} else {
			panel.getDefaultAction().mouseDragged(e);
			update();
		}
	}
	
	
	
	protected Vector3d getTranslate(double x, double y, Vector3d offset) {
		
		Ray ray = vtkUtil.createMouseRay(panel.GetRenderer(),x, y);
		
		Vector3d p = node.getWorldPosition();
		
		Vector3d i1 = new Vector3d();
        Vector3d i2 = new Vector3d();
        
        double mu[] = new double[2];
        MathTools.intersectStraightStraight( p, dir,ray.pos, ray.dir, i2, i1,mu);
        
        Vector3d t = MathTools.closestPointOnEdge(i1, s, e);
        return t;
		
	}


}