namespace TSE {

    class MaterialReferenceNode {

        public material: Material;
        public referenceCount: number = 1;

        public constructor(material: Material) {
            this.material = material;
        }

    }

    export class MaterialManager {

        private static _materials: { [name: string]: MaterialReferenceNode } = {};

        private constructor() { }

        public static registerMaterial(material: Material): void {
            if (MaterialManager._materials[material.name] === undefined)
                MaterialManager._materials[material.name] = new MaterialReferenceNode(material);
        }

        public static getMaterial(materialName: string): Material {
            if (MaterialManager._materials[materialName] === undefined) return undefined;

            MaterialManager._materials[materialName].referenceCount++;
            return MaterialManager._materials[materialName].material;
        }

        public static releaseMaterial(materialName: string): void {
            if (MaterialManager._materials[materialName] === undefined) console.warn("Cannot release an undefined Material!");
            else {
                MaterialManager._materials[materialName].referenceCount--;
                if (MaterialManager._materials[materialName].referenceCount < 1) {
                    MaterialManager._materials[materialName].material.destroy();
                    delete MaterialManager._materials[materialName];
                }
            }
        }

    }

}