/**
 * R3.D3.Pass.FXAA
 * @param graphics R3.GraphicsRuntime
 * @param apiPassFXAA R3.D3.API.Pass.FXAA
 * @constructor
 */
R3.D3.Pass.FXAA = function (
    graphics,
    apiPassFXAA
) {

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

    if (R3.Utils.UndefinedOrNull(apiPassFXAA)) {
        apiPassFXAA = {
            passType : R3.D3.API.Pass.PASS_TYPE_FXAA
        };
    }

	R3.D3.API.Pass.FXAA.call(
        this,
        apiPassFXAA,
        apiPassFXAA.autoUpdateSize,
        apiPassFXAA.width,
        apiPassFXAA.height
    );

    R3.D3.Pass.call(
        this,
        this.graphics,
        this
    );
};

R3.D3.Pass.FXAA.prototype = Object.create(R3.D3.Pass.prototype);
R3.D3.Pass.FXAA.prototype.constructor = R3.D3.Pass.FXAA;

/**
 * Create Pass.FXAA instance
 * @returns {*}
 */
R3.D3.Pass.FXAA.prototype.createInstance = function() {

    this.instance = new THREE.ShaderPass(THREE.FXAAShader);

    if (this.autoUpdateSize) {
        R3.Utils.UpdateWindowSize(this);
    }

    this.instance.uniforms['resolution'].value.set(
        1 / this.width,
        1 / this.height
    );

    console.log('Constructed an FXAA pass instance');

    R3.D3.Pass.prototype.createInstance.call(this);
};

/**
 * Update Pass.FXAA instance
 */
R3.D3.Pass.FXAA.prototype.updateInstance = function(property) {

    if (
        property === 'width' ||
        property === 'height' ||
        property === 'autoUpdateSize'
    ) {
        if (this.autoUpdateSize) {
            R3.Utils.UpdateWindowSize(this);
        }

        this.instance.uniforms['resolution'].value.set(
            1 / this.width,
            1 / this.height
        );
        return;
    }

    R3.D3.Pass.prototype.updateInstance.call(this, property);

};

/**
 * Convenience function to set size
 * @param width
 * @param height
 */
R3.D3.Pass.FXAA.prototype.setSize = function(width, height) {
    this.width  = width;
    this.height = height;
    this.updateInstance('width');
};

/**
 * R3.D3.Pass.FXAA to R3.D3.API.Pass.FXAA
 * @returns {R3.D3.API.Pass.FXAA}
 */
R3.D3.Pass.FXAA.prototype.toApiObject = function() {

    var apiPass = R3.D3.Pass.prototype.toApiObject.call(this);

    var apiFXAAPass = new R3.D3.API.Pass.FXAA(
        apiPass,
        this.autoUpdateSize,
        this.width,
        this.height
    );

    return apiFXAAPass;
};