const THREE = require('three');
const ThreeBSP = require('../three-js-csg')(THREE);
const Geometry = require('../primitives/geometry').Geometry;
const GeometryCSG = require('../geometryCSG').GeometryCSG;

const GeometryCSGInternal = function (hostIn) {
  //ZincGeoemtry of the main geometry
  let host = undefined;
  if (hostIn && hostIn.isGeometry)
    host = hostIn;
  let hostCSG = undefined;
  
  this.setGeometry = hostIn => {
    if (hostIn && hostIn.isGeometry)
	  host = hostIn;
    hostCSG = undefined;
  }
  
  this.setCSG = csg => {
	  hostCSG = csg;
  }
  
  const prepareCSG = guestGeometry => {
	  if (host && host.morph && guestGeometry && guestGeometry.morph) {
	      if (hostCSG === undefined)
	        hostCSG = new ThreeBSP(host.morph);
	      const guestCSG = new ThreeBSP(guestGeometry.morph);
	      return guestCSG;
	  }
	  return undefined;
  };
  
  this.intersect = guestGeometry => {
	  const guestCSG = prepareCSG(guestGeometry);
	  if (hostCSG && guestCSG) {
	    return hostCSG.intersect(guestCSG);
	  }
	  return undefined;
  }
  
  this.subtract = guestGeometry => {
	  const guestCSG = prepareCSG(guestGeometry);
	  if (hostCSG && guestCSG) {
		  return hostCSG.subtract(guestCSG);
	  }
	  return undefined;
  }
  
  this.union = guestGeometry => {
	  const guestCSG = prepareCSG(guestGeometry);
	  if (hostCSG && guestCSG) {
		  return hostCSG.union(guestCSG);
	  }
	  return undefined;
  }
};

exports.GeometryCSGInternal = GeometryCSGInternal;