/**
 * Spline constructor
 * @param graphics GameLib.D3.Graphics
 * @param apiSpline GameLib.D3.API.Spline
 * @constructor
 */
GameLib.D3.Spline = function Spline(
    graphics,
    apiSpline
) {

    for (var property in apiSpline) {
        if (apiSpline.hasOwnProperty(property)) {
            this[property] = apiSpline[property];
        }
    }

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

    this.instance = this.createInstance();
};

/**
 * Creates an instance spline
 * @param update boolean
 */
GameLib.D3.Spline.prototype.createInstance = function(update) {

    var vertices = [];

    for (var v = 0; v < this.vertices.length; v++) {
        vertices.push(new THREE.Vector3(
            this.vertices[v].x,
            this.vertices[v].y,
            this.vertices[v].z
        ));
    }

    return new this.graphics.instance.CatmullRomCurve3(vertices);
};

/**
 * Updates the instance
 */
GameLib.D3.Spline.prototype.updateInstance = function() {
    this.instance = this.createInstance(true);
};

/**
 * Gets the current point from the spline at the proper value
 * @param proper Number (fraction between 0 and 1 indicating position on spline)
 * @returns {*}
 */
GameLib.D3.Spline.prototype.getPointAt = function(proper) {
    var point = this.instance.getPointAt(proper);
    return new GameLib.Vector3(
        this.graphics,
        this,
        new GameLib.API.Vector3(point.x, point.y, point.z),
        0.1
    );
};

/**
 * Converts a GameLib.D3.Spline to GameLib.D3.API.Spline
 * @returns {GameLib.D3.API.Spline}
 */
GameLib.D3.Spline.prototype.toApiSpline = function() {

    return new GameLib.D3.API.Spline(
        this.id,
        this.name,
        this.vertices
    );

};

/**
 * Returns a GameLib.D3.Spline from a spline Object
 * @param graphics GameLib.D3.Graphics
 * @param objectSpline Object
 * @returns {GameLib.D3.Spline}
 * @constructor
 */
GameLib.D3.Spline.FromObjectSpline = function(
    graphics,
    objectSpline
) {

    return new GameLib.D3.Spline(
        graphics,
        new GameLib.D3.API.Spline(
            objectSpline.id,
            objectSpline.name,
            objectSpline.vertices
        )
    );

};