namespace TSE {

    class TextureReferenceNode {

        public texture: Texture;
        public referenceCount: number = 1;

        public constructor(texture: Texture) {
            this.texture = texture;
        }

    }

    export class TextureManager {

        private static _textures: { [name: string]: TextureReferenceNode } = {};

        private constructor() { }

        public static getTexture(textureName: string): Texture {
            if (TextureManager._textures[textureName] === undefined)
                TextureManager._textures[textureName] = new TextureReferenceNode(new Texture(textureName));
            else
                TextureManager._textures[textureName].referenceCount++;

            return TextureManager._textures[textureName].texture;
        }

        public static releaseTexture(textureName: string): void {
            if (TextureManager._textures[textureName] === undefined) {
                console.warn(`A Texture named ${textureName} does not exist and cannot be released!`);
            } else {
                TextureManager._textures[textureName].referenceCount--;
                if (TextureManager._textures[textureName].referenceCount < 1) {
                    TextureManager._textures[textureName].texture.destroy();
                    TextureManager._textures[textureName] = undefined;
                    delete TextureManager._textures[textureName];
                }
            }
        }

    }

}