module INSPECTOR {

    export class MeshAdapter
        extends Adapter
        implements IToolVisible, IToolDebug, IToolBoundingBox, IToolInfo {

        /** Keep track of the axis of the actual object */
        private _axesViewer: BABYLON.Nullable<BABYLON.Debug.AxesViewer>;
        private onBeforeRenderObserver: BABYLON.Nullable<BABYLON.Observer<BABYLON.Scene>>;

        constructor(mesh: BABYLON.Node) {
            super(mesh);
        }

        /** Returns the name displayed in the tree */
        public id(): string {
            let str = '';
            if (this._obj.name) {
                str = this._obj.name;
            } // otherwise nothing displayed        
            return str;
        }

        /** Returns the type of this object - displayed in the tree */
        public type(): string {
            return Helpers.GET_TYPE(this._obj);
        }

        /** Returns the list of properties to be displayed for this adapter */
        public getProperties(): Array<PropertyLine> {
            return Helpers.GetAllLinesProperties(this._obj);
        }

        public getTools(): Array<AbstractTreeTool> {
            let tools = [];
            tools.push(new Checkbox(this));
            tools.push(new DebugArea(this));
            if (this._obj instanceof BABYLON.AbstractMesh) {
                if ((this._obj as BABYLON.AbstractMesh).getTotalVertices() > 0) {
                    tools.push(new BoundingBox(this));
                }
            }


            tools.push(new Info(this));
            return tools;
        }

        public setVisible(b: boolean) {
            this._obj.setEnabled(b);
            this._obj.isVisible = b;
        }
        public isVisible(): boolean {
            return this._obj.isEnabled() && this._obj.isVisible;
        }
        public isBoxVisible(): boolean {
            return (this._obj as BABYLON.AbstractMesh).showBoundingBox;
        }
        public setBoxVisible(b: boolean) {
            return (this._obj as BABYLON.AbstractMesh).showBoundingBox = b;
        }

        public debug(enable: boolean) {
            // Draw axis the first time
            if (!this._axesViewer) {
                this._drawAxis();
            }
            // Display or hide axis
            if (!enable && this._axesViewer) {
                let mesh = this._obj as BABYLON.AbstractMesh;
                mesh.getScene().onBeforeRenderObservable.remove(this.onBeforeRenderObserver);
                this._axesViewer.dispose();
                this._axesViewer = null;
            }
        }

        /** Returns some information about this mesh */
        public getInfo(): string {
            if (this._obj instanceof BABYLON.AbstractMesh) {
                return `${(this._obj as BABYLON.AbstractMesh).getTotalVertices()} vertices`;
            }
            return '0 vertices';
        }

        /** Draw X, Y and Z axis for the actual object if this adapter.
         * Should be called only one time as it will fill this._axis
         */
        private _drawAxis() {
            this._obj.computeWorldMatrix();

            // Axis
            var x = new BABYLON.Vector3(1, 0, 0);
            var y = new BABYLON.Vector3(0, 1, 0);
            var z = new BABYLON.Vector3(0, 0, 1);

            this._axesViewer = new BABYLON.Debug.AxesViewer(this._obj.getScene());

            let mesh = this._obj as BABYLON.TransformNode;
            this.onBeforeRenderObserver = mesh.getScene().onBeforeRenderObservable.add(() => {
                let matrix = mesh.getWorldMatrix();
                let extend = new BABYLON.Vector3(1, 1, 1);
                if (mesh instanceof BABYLON.AbstractMesh) {
                    extend = mesh.getBoundingInfo().boundingBox.extendSizeWorld;
                }
                this._axesViewer!.scaleLines = Math.max(extend.x, extend.y, extend.z) * 2;
                this._axesViewer!.update(this._obj.position, BABYLON.Vector3.TransformNormal(x, matrix), BABYLON.Vector3.TransformNormal(y, matrix), BABYLON.Vector3.TransformNormal(z, matrix));
            });
        }
    }
}