/**
 * Viewport Runtime
 * @param graphics GameLib.D3.Graphics
 * @param apiViewport GameLib.D3.API.Viewport
 * @param imageFactory GameLib.D3.ImageFactory
 * @constructor
 */
GameLib.D3.Viewport = function (
    graphics,
    apiViewport
) {

    this.graphics = graphics;
    this.graphics.isNotThreeThrow();

    if (GameLib.Utils.UndefinedOrNull(apiViewport)) {
        apiViewport = {};
    }

    GameLib.D3.API.Viewport.call(
        this,
  		apiViewport.id,
		apiViewport.name,
		apiViewport.width,
		apiViewport.height,
		apiViewport.x,
		apiViewport.y,
		apiViewport.composer,
        apiViewport.renderer,
		apiViewport.scene,
		apiViewport.camera,
		apiViewport.parentEntity
    );

    if (this.composer instanceof GameLib.D3.API.Composer) {
        this.composer = new GameLib.D3.Composer(
            this.graphics,
            this.composer
        )
    }

    if (this.renderer instanceof GameLib.D3.API.Renderer) {
        this.renderer = new GameLib.D3.Renderer(
            this.graphics,
            this.renderer
        )
    }
    
    if (this.scene instanceof GameLib.D3.API.Scene) {
        this.scene = new GameLib.D3.Scene(
            this.graphics,
            this.scene
        )
    }

    if (this.camera instanceof GameLib.D3.API.Camera) {
        this.camera = new GameLib.D3.Camera(
            this.graphics,
            this.camera
        )
    }

    this.buildIdToObject();

    this.instance = this.createInstance();
};

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

//GameLib.D3.Viewport.VIEWPORT_TYPE_GAME = 0x1;

/**
 *
 * @param update
 * @returns {*}
 */
GameLib.D3.Viewport.prototype.createInstance = function(update) {
    
    var instance = null;
    
    if (update) {
        instance = this.instance;
    }

    if (this.renderer) {
        this.renderer.width = this.width - this.x;
        this.renderer.height = this.height - this.y;
        this.renderer.updateInstance();

        this.renderer.instance.setViewport(
            this.x,
            this.y,
            this.width,
            this.height
        );
    } else if (this.composer) {
        this.composer.renderer.width = this.width - this.x;
        this.composer.renderer.height = this.height - this.y;
        this.composer.renderer.updateInstance();

        this.composer.renderer.instance.setViewport(
            this.x,
            this.y,
            this.width,
            this.height
        );

        this.composer.passes.map(
            function(pass) {
                if (pass.camera instanceof GameLib.D3.Camera) {
                    pass.camera.aspect = (this.width - this.x) / (this.height - this.y);
                    pass.camera.updateInstance();
                }
            }.bind(this)
        )
    }

    if (this.camera) {
        this.camera.aspect = (this.width - this.x) / (this.height - this.y);
        this.camera.updateInstance();
    }

    return instance;
};

/**
 *
 */
GameLib.D3.Viewport.prototype.updateInstance = function() {
    this.instance = this.createInstance(true);
};

/**
 * GameLib.D3.Viewport to GameLib.D3.API.Viewport
 * @returns {GameLib.D3.API.Viewport}
 */
GameLib.D3.Viewport.prototype.toApiComponent = function() {

    var apiViewport = new GameLib.D3.API.Viewport(
        this.id,
        this.name,
        this.width,
        this.height,
        this.x,
        this.y,
        GameLib.Utils.IdOrNull(this.composer),
        GameLib.Utils.IdOrNull(this.scene),
        GameLib.Utils.IdOrNull(this.camera),
        GameLib.Utils.IdOrNull(this.parentEntity)
    );

    return apiViewport;
};

/**
 * GameLib.D3.Viewport from Object Viewport
 * @param graphics
 * @param objectComponent
 * @returns {GameLib.D3.Viewport}
 * @constructor
 */
GameLib.D3.Viewport.FromObjectComponent = function(graphics, objectComponent) {

    var apiViewport = GameLib.D3.API.Viewport.FromObjectComponent(objectComponent);

    return new GameLib.D3.Viewport(
        graphics,
        apiViewport
    );
};

/**
 * Component update override
 */
GameLib.D3.Viewport.prototype.update = function() {

    if (this.renderer && this.scene && this.camera) {
        this.renderer.instance.render(
            this.scene.instance,
            this.camera.instance
        )
    } else if (this.composer) {
        this.composer.instance.render();
    }

};