/**
 * Helpers for displaying outlines or making 'invisible' scene objects visible
 * @param graphics GameLib.D3.Graphics
 * @param id
 * @param name
 * @param object
 * @param helperType
 * @constructor
 */
GameLib.D3.Helper = function(
    graphics,
    id,
    name,
    object,
    helperType
) {
    this.graphics = graphics;
    this.graphics.isNotThreeThrow();

	GameLib.Component.call(
		this,
		GameLib.Component.COMPONENT_HELPER
    );

    if (GameLib.Utils.UndefinedOrNull(id)) {
        id = GameLib.Utils.RandomId();
    }
    this.id = id;

    if (GameLib.Utils.UndefinedOrNull(name)) {
        name = 'Helper (' + id + ')';
    }
    this.name = name;

    if (GameLib.Utils.UndefinedOrNull(object)) {
        console.warn('Cannot create a helper for an Object which does not exist');
        throw new Error('Cannot create a helper for an Object which does not exist');
    }
    this.object = object;

    if (GameLib.Utils.UndefinedOrNull(helperType)) {

        helperType = GameLib.D3.Helper.HELPER_TYPE_NONE;

        if (
            object instanceof GameLib.D3.Mesh &&
            object.meshType !== GameLib.D3.Mesh.TYPE_CURVE
        ) {
            helperType = GameLib.D3.Helper.HELPER_TYPE_EDGES;
        }

        if (object instanceof GameLib.D3.Light) {
            if (object.lightType === GameLib.D3.Light.LIGHT_TYPE_DIRECTIONAL) {
                helperType = GameLib.D3.Helper.HELPER_TYPE_DIRECTIONAL_LIGHT;
            }

            if (object.lightType === GameLib.D3.Light.LIGHT_TYPE_POINT) {
                helperType = GameLib.D3.Helper.HELPER_TYPE_POINT_LIGHT;
            }

            if (object.lightType === GameLib.D3.Light.LIGHT_TYPE_SPOT) {
                helperType = GameLib.D3.Helper.HELPER_TYPE_SPOT_LIGHT;
            }
        }

        if (object instanceof GameLib.D3.Skeleton) {
            helperType = GameLib.D3.Helper.HELPER_TYPE_SKELETON;
        }
    }
    this.helperType = helperType;

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

GameLib.D3.Helper.prototype = Object.create(GameLib.Component.prototype);
GameLib.D3.Helper.prototype.constructor = GameLib.D3.Helper;

/**
 * Helper types
 * @type {string}
 */
GameLib.D3.Helper.HELPER_TYPE_NONE              = 0x0;
GameLib.D3.Helper.HELPER_TYPE_EDGES             = 0x1;
GameLib.D3.Helper.HELPER_TYPE_DIRECTIONAL_LIGHT = 0x2;
GameLib.D3.Helper.HELPER_TYPE_SPOT_LIGHT        = 0x3;
GameLib.D3.Helper.HELPER_TYPE_POINT_LIGHT       = 0x4;
GameLib.D3.Helper.HELPER_TYPE_WIREFRAME         = 0x5;
GameLib.D3.Helper.HELPER_TYPE_SKELETON          = 0x6;

/**
 * Creates a helper instance
 * @param update
 */
GameLib.D3.Helper.prototype.createInstance = function(update) {

    var instance = null;

    if (update) {
        instance = this.instance;
    }

    if (this.helperType === GameLib.D3.Helper.HELPER_TYPE_EDGES) {
        instance = new THREE.EdgesHelper(this.object.instance, 0x00FF00);
    }

    if (this.helperType === GameLib.D3.Helper.HELPER_TYPE_DIRECTIONAL_LIGHT) {
        instance = new THREE.DirectionalLightHelper(this.object.instance);
    }

    if (this.helperType === GameLib.D3.Helper.HELPER_TYPE_POINT_LIGHT) {
        instance = new THREE.PointLightHelper(this.object.instance, 1);
    }

    if (this.helperType === GameLib.D3.Helper.HELPER_TYPE_SPOT_LIGHT) {
        instance = new THREE.SpotLightHelper(this.object.instance);
    }

    if (this.helperType === GameLib.D3.Helper.HELPER_TYPE_WIREFRAME) {
        instance = new THREE.WireframeGeometry(this.object.instance, 0x00FF00);
    }

    if (this.helperType === GameLib.D3.Helper.HELPER_TYPE_SKELETON) {
        instance = new THREE.SkeletonHelper(this.object.instance);
    }

    return instance;
};

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