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.common.VTKNodeMap;
import org.simantics.g3d.vtk.swt.InteractiveVtkComposite;
import org.simantics.g3d.vtk.swt.TranslateAction;
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 boolean inline;
    
	private Vector3d s;
	private Vector3d e;
	private Vector3d dir;

	public TranslateInlineAction(InteractiveVtkComposite 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 if (comp.getNext() == null || comp.getPrevious() == null) {
                setEnabled(true);
                inline = false;
                dir = comp.getControlPoint().getPathLegDirection(Direction.NEXT);
                dir.normalize();
            } else {
				setEnabled(true);
				inline = 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().isFixedLength() && prev.getPrevious() != null)
					prev = prev.getPrevious();
				if (next.getControlPoint().isInline() && !next.getControlPoint().isFixedLength() && next.getNext() != null) {
					next = next.getNext();
				}
				Point3d ns = new Point3d();
				Point3d ne = new Point3d();
				Point3d ps = new Point3d();
				Point3d pe = new Point3d();
				next.getEnds(ns, ne);
				prev.getEnds(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();
				if (prev.getControlPoint().isVariableLength())
					s = MathTools.closestPointOnStraight(ps, wp, dir);
				else
					s = MathTools.closestPointOnStraight(pe, wp, dir);
				if (next.getControlPoint().isVariableLength())
					e = MathTools.closestPointOnStraight(ne, wp, dir);
				else
					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 boolean keyPressed(KeyEvent e) {
		if (e.getKeyCode() == KeyEvent.VK_ESCAPE)
			panel.useDefaultAction();
		if (!inline) {
		    return super.keyPressed(e);
		} else {
    		if (valid)
    			return true;
    		
    		update();
    		return true;
		}
	}
	
	@Override
	public void setWorldCoord(boolean b) {
		
	}
	
	@Override
	public boolean mouseDragged(MouseEvent e) {
		//if ((e.getModifiersEx() & MouseEvent.BUTTON1_DOWN_MASK) > 0 && valid) { 
	    if (e.getButton() == MouseEvent.BUTTON1  && valid) {
			if (inline) {
    			Vector3d translate = getTranslate(e.getX(), e.getY(), prevTranslate);
    			//System.out.println("translate " + translate);
    			if (translate == null)
    				return true;
    			//boolean step = ((e.getModifiers() & MouseEvent.CTRL_MASK) > 0);
    			Vector3d pos = new Vector3d(node.getWorldPosition());
    			
    			System.out.println(pos + " " + translate);
    			//pos.add(translate);
    			pos.set(translate);
    			//pos = constaints(pos, step);
    			setWorldPos(pos);
    			update();
			} else {
			    super.mouseDragged(e);
			}
		} else {
			getDefaultAction().mouseDragged(e);
			update();
		} 
		return true;
	}
	
	protected Vector3d getTranslate(double x, double y, Vector3d offset) {
		
		Ray ray = vtkUtil.createMouseRay(panel.getRenderer(),x, y);
		
		Vector3d p = node.getWorldPosition();
		
		if (inline) {
    		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;
		} else {
		    return super.getTranslate(x, y, offset);
		}
		
	}


}