/**
 * Scene Superset - The apiScene properties get moved into the Scene object itself, and then the instance is
 * created
 * @param graphics
 * @param apiScene GameLib.D3.API.Scene
 * @param computeNormals
 * @constructor
 */
GameLib.D3.Scene = function (
    graphics,
    apiScene,
    computeNormals
) {
    this.graphics = graphics;
    this.graphics.isNotThreeThrow();

    if (GameLib.Utils.UndefinedOrNull(apiScene)) {
        apiScene = {};
    }

	if (apiScene instanceof GameLib.D3.Scene) {
		return apiScene;
	}

    if (GameLib.Utils.UndefinedOrNull(computeNormals)) {
        computeNormals = true;
    }
    this.computeNormals = computeNormals;

    GameLib.D3.API.Scene.call(
        this,
		apiScene.id,
		apiScene.name,
        apiScene.imageFactory,
        apiScene.meshes,
        apiScene.position,
		apiScene.quaternion,
		apiScene.scale,
        apiScene.parentGameId,
        apiScene.lights,
        apiScene.textures,
		apiScene.materials,
		apiScene.parentEntity
    );

    if (this.imageFactory instanceof GameLib.D3.API.ImageFactory) {
        this.imageFactory = new GameLib.D3.ImageFactory(
            this.graphics,
            this.imageFactory
        );
    }

    this.meshes = this.meshes.map(
        function(apiMesh) {

            if (apiMesh instanceof GameLib.D3.API.Mesh) {

                return new GameLib.D3.Mesh(
                    this.graphics,
                    apiMesh,
                    this.imageFactory,
                    this.computeNormals
                );

            } else {
                console.warn('apiMesh not an instance of API.Mesh');
                throw new Error('apiMesh not an instance of API.Mesh');
            }

        }.bind(this)
    );

    this.position = new GameLib.Vector3(
        this.graphics,
        this.position,
        this
    );

    this.quaternion = new GameLib.Quaternion(
        this.graphics,
        this.quaternion,
        this
    );

    this.scale = new GameLib.Vector3(
        this.graphics,
        this.scale,
        this
    );

    this.lights = this.lights.map(
        function(apiLight) {

            if (apiLight instanceof GameLib.D3.API.Light) {

                return new GameLib.D3.Light(
                    this.graphics,
                    apiLight
                );

            } else {
                console.warn('apiLight not an instance of API.Light');
                throw new Error('apiLight not an instance of API.Light');
            }

        }.bind(this)
    );

    this.textures = this.textures.map(
        function(apiTexture) {

            if (apiTexture instanceof GameLib.D3.API.Texture) {
                var texture = new GameLib.D3.Texture(
                    this.graphics,
                    apiTexture,
                    this.imageFactory
                );

                this.idToObject[texture.id] = texture;

                return texture;
            } else {
                console.warn('apiTexture not an instance of API.Texture');
                throw new Error('apiTexture not an instance of API.Texture');
            }

        }.bind(this)
    );

    this.materials = this.materials.map(
        function(apiMaterial) {

            if (apiMaterial instanceof GameLib.D3.API.Material) {

                var material = new GameLib.D3.Material(
                    this.graphics,
                    apiMaterial,
                    this.imageFactory
                );

                this.idToObject[material.id] = material;

                return material;

            } else {
                console.warn('apiMaterial not an instance of API.Material');
                throw new Error('apiMaterial not an instance of API.Material');
            }

        }.bind(this)
    );

    this.idToObject[this.id] = this;

    this.linkObjects(this.idToObject);

    this.meshes.map(
        function(mesh) {
            mesh.updateInstance();
            mesh.materials.map(
                function(material) {
                    material.updateInstance();
                }
            )
        }
    );

    this.buildIdToObject();

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

GameLib.D3.Scene.prototype = Object.create(GameLib.D3.API.Scene.prototype);
GameLib.D3.Scene.prototype.constructor = GameLib.D3.Scene;

/**
 * Creates an instance scene
 * @returns {THREE.Scene}
 */
GameLib.D3.Scene.prototype.createInstance = function() {

    var instance = new THREE.Scene();

    instance.name = this.name;

    instance.position = this.position.instance;

    instance.scale = this.scale.instance;

    instance.quaternion = this.quaternion.instance;

    for (var im = 0; im < this.meshes.length; im++) {
        instance.add(this.meshes[im].instance);
    }

    for (var l = 0; l < this.lights.length; l++) {
        instance.add(this.lights[l].instance);
    }

    return instance;
};

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

    var apiImageFactory = null;
    if (this.imageFactory instanceof GameLib.D3.ImageFactory) {
        apiImageFactory = this.imageFactory.toApiObject();
    }

    var apiMeshes = this.meshes.map(
        function(mesh) {
            return mesh.toApiObject();
        }
    );

    var apiLights = this.lights.map(
        function(light) {
            return light.toApiObject();
        }
    );

    var apiTextures = this.textures.map(
        function(texture) {
            return texture.toApiObject();
        }
    );

    var apiMaterials = this.materials.map(
        function(material) {
            return material.toApiObject();
        }
    );

    return new GameLib.D3.API.Scene(
        this.id,
        this.name,
        apiImageFactory,
        apiMeshes,
        this.position.toApiObject(),
        this.quaternion.toApiObject(),
        this.scale.toApiObject(),
        this.parentGameId,
        apiLights,
        apiTextures,
        apiMaterials,
        GameLib.Utils.IdOrNull(this.parentEntity)
    );
};

/**
 * Converts a scene Object to a GameLib.D3.Scene object
 * @param graphics GameLib.D3.Graphics
 * @param objectScene Object
 * @param computeNormals boolean to indicate whether or not to recalculate normals
 * @param imageFactory GameLib.D3.ImageFactory
 * @returns {GameLib.D3.Scene}
 * @constructor
 */
GameLib.D3.Scene.FromObjectScene = function(
    graphics,
    objectScene,
    computeNormals,
    imageFactory
) {
    var apiScene = GameLib.D3.API.Scene.FromObjectScene(objectScene, imageFactory);

    return new GameLib.D3.Scene(
        graphics,
        apiScene,
        computeNormals
    );
};