/**
 * GameLib.D3.Camera.Perspective
 * @param graphics GameLib.GraphicsRuntime
 * @param apiPerspectiveCamera
 * @constructor
 */
GameLib.D3.Camera.Perspective = function(
	graphics,
	apiPerspectiveCamera
) {

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

    if (GameLib.Utils.UndefinedOrNull(apiPerspectiveCamera)) {
        apiPerspectiveCamera = {
            cameraType : GameLib.D3.API.Camera.CAMERA_TYPE_PERSPECTIVE
        };
    }

    GameLib.D3.API.Camera.Perspective.call(
        this,
        apiPerspectiveCamera,
        apiPerspectiveCamera.near,
        apiPerspectiveCamera.far,
        apiPerspectiveCamera.fov,
        apiPerspectiveCamera.filmGauge,
        apiPerspectiveCamera.filmOffset,
        apiPerspectiveCamera.focus,
        apiPerspectiveCamera.zoom
    );

    GameLib.D3.Camera.call(
        this,
        this.graphics,
        this
    );
    
};

GameLib.D3.Camera.Perspective.prototype = Object.create(GameLib.D3.Camera.prototype);
GameLib.D3.Camera.Perspective.prototype.constructor = GameLib.D3.Camera.Perspective;

/**
 * Creates a camera instance
 * @returns {*}
 */
GameLib.D3.Camera.Perspective.prototype.createInstance = function() {

    this.instance = new THREE.PerspectiveCamera(
        this.fov,
        this.aspect,
        this.near,
        this.far
    );

    this.instance.filmGauge     = this.filmGauge;
    this.instance.filmOffset    = this.filmOffset;
    this.instance.focus         = this.focus;
    this.instance.zoom          = this.zoom;

    GameLib.D3.Camera.prototype.createInstance.call(this);
};

/**
 * Updates the instance with the current state
 */
GameLib.D3.Camera.Perspective.prototype.updateInstance = function(property) {

    if (property === 'near') {
        this.instance.near = this.near;
        return;
    }

    if (property === 'far') {
        this.instance.far = this.far;
        return;
    }

    if (property === 'fov') {
        this.instance.fov = this.fov;
        return;
    }

    if (property === 'filmGauge') {
        this.instance.filmGauge = this.filmGauge;
        return;
    }

    if (property === 'filmOffset') {
        this.instance.filmOffset = this.filmOffset;
        return;
    }

    if (property === 'focus') {
        this.instance.focus = this.focus;
        return;
    }

    if (property === 'zoom') {
        this.instance.zoom = this.zoom;
        return;
    }
        
    GameLib.D3.Camera.prototype.updateInstance.call(this, property);
};

/**
 * Converts a GameLib.D3.Camera to a GameLib.D3.API.Camera
 * @returns {GameLib.D3.API.Camera}
 */
GameLib.D3.Camera.Perspective.prototype.toApiObject = function() {

    var apiCamera = GameLib.D3.Camera.prototype.toApiObject.call(this);

    var apiPerspectiveCamera = new GameLib.D3.API.Camera.Perspective(
        apiCamera,
        this.near,
        this.far,
        this.fov,
        this.filmGauge,
        this.filmOffset,
        this.focus,
        this.zoom
    );

    return apiPerspectiveCamera;
};

GameLib.D3.Camera.Perspective.prototype.updateFromInstance = function() {
    this.near = this.instance.near;
    this.far = this.instance.far;
    this.fov = this.instance.fov;
    this.filmGauge = this.instance.filmGauge;
    this.filmOffset = this.instance.filmOffset;
    this.focus = this.instance.focus;
    this.zoom = this.instance.zoom;
    GameLib.D3.Camera.prototype.updateFromInstance.call(this);
};