/**
 * API Skeleton
 * @param id
 * @param name
 * @param bones GameLib.D3.API.Bone[]
 * @param boneInverses GameLib.API.Matrix4[]
 * @param useVertexTexture boolean
 * @param boneTextureWidth Number
 * @param boneTextureHeight Number
 * @param boneMatrices GameLib.API.Matrix4[]
 * @param boneTexture null (not implemented)
 * @param parentEntity
 * @constructor
 */
GameLib.D3.API.Skeleton = function (
    id,
    name,
    bones,
    boneInverses,
    useVertexTexture,
    boneTextureWidth,
    boneTextureHeight,
    boneMatrices,
    boneTexture,
    parentEntity
) {
    if (GameLib.Utils.UndefinedOrNull(parentEntity)) {
        parentEntity = null;
    }
    this.parentEntity = parentEntity;

    GameLib.Component.call(
        this,
        GameLib.Component.COMPONENT_SKELETON,
        {
            'bones'        : [GameLib.D3.Bone]
        },
        false,
        parentEntity
    );

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

    if (GameLib.Utils.UndefinedOrNull(name)) {
        name = 'Skeleton';
    }
    this.name = name;

    if (GameLib.Utils.UndefinedOrNull(bones)) {
        bones = [];
    }
    this.bones = bones;

    /**
     * An array of Matrix4s that represent the inverse of the matrixWorld of the individual bones.
     */
    if (GameLib.Utils.UndefinedOrNull(boneInverses)) {
        boneInverses = [];
    }
    this.boneInverses = boneInverses;

    /**
     * Use a vertex texture in the shader - allows for more than 4 bones per vertex, not supported by all devices
     */
    if (GameLib.Utils.UndefinedOrNull(useVertexTexture)) {
        useVertexTexture = false;
    }
    this.useVertexTexture = useVertexTexture;
    if (useVertexTexture) {
        console.warn('support for vertex texture bones is not supported yet - something could break somewhere');
    }

    if (GameLib.Utils.UndefinedOrNull(boneTextureWidth)) {
        boneTextureWidth = 0;
    }
    this.boneTextureWidth = boneTextureWidth;

    if (GameLib.Utils.UndefinedOrNull(boneTextureHeight)) {
        boneTextureHeight = 0;
    }
    this.boneTextureHeight = boneTextureHeight;

    if (GameLib.Utils.UndefinedOrNull(boneMatrices)) {
        boneMatrices = [];
    }
    this.boneMatrices = boneMatrices;

    if (GameLib.Utils.UndefinedOrNull(boneTexture)) {
        boneTexture = null;
    }
    this.boneTexture = boneTexture;
};

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

/**
 * Creates an API skeleton from an Object skeleton
 * @param objectSkeleton
 * @constructor
 */
GameLib.D3.API.Skeleton.FromObjectSkeleton = function(objectSkeleton) {
    return new GameLib.D3.API.Skeleton(
        objectSkeleton.id,
        objectSkeleton.name,
        objectSkeleton.bones.map(
            function (objectBone) {
                return GameLib.D3.API.Bone.FromObjectBone(objectBone);
            }
        ),
        objectSkeleton.boneInverses.map(
            function (boneInverse) {
                return GameLib.D3.API.Matrix4.FromObjectMatrix(boneInverse);
            }
        ),
        objectSkeleton.useVertexTexture,
        objectSkeleton.boneTextureWidth,
        objectSkeleton.boneTextureHeight,
        objectSkeleton.boneMatrices.map(
            function (boneMatrix) {
                return GameLib.D3.API.Matrix4.FromObjectMatrix(boneMatrix);
            }
        ),
        objectSkeleton.boneTexture,
        objectSkeleton.parentEntity
    );
};