/**
 * R3.D3.Geometry.Buffer.TorusKnot
 * @param graphics R3.Runtime.Graphics
 * @param apiGeometryBufferTorusKnot
 * @constructor
 */
R3.D3.Geometry.Buffer.TorusKnot = function(
	graphics,
	apiGeometryBufferTorusKnot
) {

    this.graphics = graphics;
    this.graphics.isNotThreeThrow();

    if (R3.Utils.UndefinedOrNull(apiGeometryBufferTorusKnot)) {
        apiGeometryBufferTorusKnot = {
            geometryType : R3.D3.API.Geometry.GEOMETRY_TYPE_BUFFER_TORUS_KNOT
        };
    }

    R3.D3.API.Geometry.Buffer.TorusKnot.call(
        this,
        apiGeometryBufferTorusKnot,
        apiGeometryBufferTorusKnot.radius,
        apiGeometryBufferTorusKnot.tube,
        apiGeometryBufferTorusKnot.radialSegments,
        apiGeometryBufferTorusKnot.tubularSegments,
        apiGeometryBufferTorusKnot.p,
        apiGeometryBufferTorusKnot.q
    );

    R3.D3.Geometry.Buffer.call(
        this,
        this.graphics,
        apiGeometryBufferTorusKnot
    );
    
};

R3.D3.Geometry.Buffer.TorusKnot.prototype = Object.create(R3.D3.Geometry.Buffer.prototype);
R3.D3.Geometry.Buffer.TorusKnot.prototype.constructor = R3.D3.Geometry.Buffer.TorusKnot;

/**
 * Creates a light instance
 * @returns {*}
 */
R3.D3.Geometry.Buffer.TorusKnot.prototype.createInstance = function() {

    this.instance = new THREE.TorusKnotBufferGeometry(
        this.radius,
        this.tube,
        this.radialSegments,
        this.tubularSegments,
        this.p,
        this.q
    );

    this.computeVertexNormals();

    R3.D3.Geometry.Buffer.prototype.createInstance.call(this);
};

/**
 * Updates the instance with the current state
 */
R3.D3.Geometry.Buffer.TorusKnot.prototype.updateInstance = function(property) {

    if (
        property === 'radius' ||
        property === 'tube' ||
        property === 'radialSegments' ||
        property === 'tubularSegments' ||
        property === 'p' ||
        property === 'q'
    ) {
        this.instance.dispose();
        this.createInstance();

        if (this.parentMesh && this.parentMesh.instance) {
            this.parentMesh.instance.geometry = this.instance;

            if (this.parentMesh.helper) {
                this.parentMesh.removeHelper();
                this.parentMesh.createHelper();
            }
        }

        return;
    }

    R3.D3.Geometry.Buffer.prototype.updateInstance.call(this, property);
};

/**
 * Converts a R3.D3.Geometry.Buffer.TorusKnot to a R3.D3.API.Geometry.Buffer.TorusKnot
 * @returns {R3.D3.API.Geometry.Buffer}
 */
R3.D3.Geometry.Buffer.TorusKnot.prototype.toApiObject = function() {

    var apiBufferGeometry = R3.D3.Geometry.Buffer.prototype.toApiObject.call(this);

    var apiGeometryBufferTorusKnot = new R3.D3.API.Geometry.Buffer.TorusKnot(
        apiBufferGeometry,
        this.radius,
        this.tube,
        this.radialSegments,
        this.tubularSegments,
        this.p,
        this.q
    );

    return apiGeometryBufferTorusKnot;
};