module es {
    export class SpriteRenderer extends RenderableComponent {
        public get bounds(){
            if (this._areBoundsDirty){
                if (this._sprite){
                    this._bounds.calculateBounds(this.entity.transform.position, this._localOffset, this._origin,
                        this.entity.transform.scale, this.entity.transform.rotation, this._sprite.sourceRect.width,
                        this._sprite.sourceRect.height);
                    this._areBoundsDirty = false;
                }

                return this._bounds;
            }
        }

        /**
         * 精灵的原点。这是在设置精灵时自动设置的
         */
        public get origin(): Vector2{
            return this._origin;
        }

        /**
         * 精灵的原点。这是在设置精灵时自动设置的
         * @param value
         */
        public set origin(value: Vector2){
            this.setOrigin(value);
        }

        /**
         * 用归一化方法设置原点
         * x/y 均为 0-1
         */
        public get originNormalized(): Vector2{
            return new Vector2(this._origin.x / this.width * this.entity.transform.scale.x,
                this._origin.y / this.height * this.entity.transform.scale.y);
        }

        /**
         * 用归一化方法设置原点
         * x/y 均为 0-1
         * @param value
         */
        public set originNormalized(value: Vector2){
            this.setOrigin(new Vector2(value.x * this.width / this.entity.transform.scale.x,
                value.y * this.height / this.entity.transform.scale.y));
        }

        /**
         * 应该由这个精灵显示的精灵
         * 当设置时，精灵的原点也被设置为精灵的origin
         */
        public get sprite(): Sprite {
            return this._sprite;
        }

        /**
         * 应该由这个精灵显示的精灵
         * 当设置时，精灵的原点也被设置为精灵的origin
         * @param value
         */
        public set sprite(value: Sprite) {
            this.setSprite(value);
        }

        protected _origin: Vector2;
        protected _sprite: Sprite;

        constructor(sprite: Sprite | egret.Texture) {
            super();
            if (sprite instanceof Sprite)
                this.setSprite(sprite);
            else if(sprite instanceof  egret.Texture)
                this.setSprite(new Sprite(sprite));
        }

        /**
         * 设置精灵并更新精灵的原点以匹配sprite.origin
         * @param sprite
         */
        public setSprite(sprite: Sprite): SpriteRenderer {
            this._sprite = sprite;
            if (this._sprite) {
                this._origin = this._sprite.origin;
            }

            return this;
        }

        /**
         * 设置可渲染的原点
         * @param origin
         */
        public setOrigin(origin: Vector2): SpriteRenderer{
            if (this._origin != origin){
                this._origin = origin;
                this._areBoundsDirty = true;
            }

            return this;
        }

        /**
         * 用归一化方法设置原点
         * x/y 均为 0-1
         * @param value
         */
        public setOriginNormalized(value: Vector2): SpriteRenderer{
            this.setOrigin(new Vector2(value.x * this.width / this.entity.transform.scale.x,
                value.y * this.height / this.entity.transform.scale.y));
            return this;
        }

        public render(camera: Camera) {
            // TODO: render
        }
    }
}