/**
* Provides access to the Webcam (if available)
*/
Phaser.Plugin.Webcam = function (game, parent) {

	Phaser.Plugin.call(this, game, parent);

	if (!game.device.getUserMedia)
	{
		return false;
	}

	navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;

	this.context = null;
	this.stream = null;

	this.video = document.createElement('video');
	this.video.autoplay = true;

};

Phaser.Plugin.Webcam.prototype = Object.create(Phaser.Plugin.prototype);
Phaser.Plugin.Webcam.prototype.constructor = Phaser.Plugin.Webcam;

Phaser.Plugin.Webcam.prototype.start = function (width, height, context) {

console.log('Webcam start', width, height);

	this.context = context;

	if (!this.stream)
	{
		navigator.getUserMedia( { video: { mandatory: { minWidth: width, minHeight: height } } }, this.connectCallback.bind(this), this.errorCallback.bind(this));
	}

};

Phaser.Plugin.Webcam.prototype.stop = function () {

	if (this.stream)
	{
		this.stream.stop();
		this.stream = null;
	}

};

Phaser.Plugin.Webcam.prototype.connectCallback = function (stream) {

	this.stream = stream;

	this.video.src = window.URL.createObjectURL(this.stream);

};

Phaser.Plugin.Webcam.prototype.errorCallback = function (e) {

	console.log('Video Stream rejected', e);

};

Phaser.Plugin.Webcam.prototype.grab = function (context, x, y) {

	if (this.stream)
	{
		context.drawImage(this.video, x, y);
	}

};

Phaser.Plugin.Webcam.prototype.update = function () {

	if (this.stream)
	{
		this.context.drawImage(this.video, 0, 0);
	}

};

/**
* @name Phaser.Plugin.Webcam#active
* @property {boolean} active - Is this Webcam plugin capturing a video stream or not?
* @readonly
*/
Object.defineProperty(Phaser.Plugin.Webcam.prototype, "active", {

    get: function() {
        return (this.stream);
    }

});