package {
	
	import flash.display.Sprite;
	import flash.display.Graphics;
	import flash.geom.Point;
	import flash.media.SoundMixer;
	import flash.utils.ByteArray;
	import flash.utils.Timer;
	import flash.events.*;

	public class visualization extends Sprite {

		private var _bytes:ByteArray = new ByteArray();
		private var _visLoc:Point;
		private var _visScale:Number;
		private var _waveHeight:Number;
		private var _baseNum:Number;
		private var _fft:Boolean;
		private var _g:Graphics;
		private var _timer:Timer;
		private var _color ;

		public function visualization(obj:Object) {
			_waveHeight = obj.waveHeight;
			_baseNum = obj.baseNum;
			_visLoc = obj.visLoc;
			_visScale = obj.visScale;
			_fft = obj.fft;
			_color = obj.musicColor;
			initVars();

			addVisTimer();
			
			var canvas:Sprite = new Sprite();
			addChild(canvas);
			canvas.x = _visLoc.x;
			canvas.y = _visLoc.y;
			canvas.scaleX = canvas.scaleY = _visScale;
			_g = canvas.graphics;
		}
		
		private function initVars():void {
			if (isNaN(_waveHeight)) { _waveHeight = 150; }
			if (isNaN(_baseNum)) { _baseNum = 0; }
			if (!(_visLoc is Point)) { _visLoc = new Point(); }
			if (isNaN(_visScale)) { _visScale = 1; }
			if (isNaN(_color)) {_color = 0xFF6666;}
		}
		
		public function addVisTimer():void {
			if (_timer == null) {
				_timer = new Timer(50);
				_timer.addEventListener("timer", onVisualize);
				_timer.start();
			}
		}
		
		public function removeVisTimer():void {
			removeEventListener("timer", onVisualize);
			_timer = null;
		}

		private function onVisualize(evt:TimerEvent):void {
			SoundMixer.computeSpectrum(_bytes, _fft, 0);
			_g.clear();
			plotWaveform(_color,_baseNum);
		}
		
		private function plotWaveform(col:uint, chanBaseline:Number):void {
			_g.lineStyle(1, col);
			for (var i:Number = 0; i < 360; i+=2) {
				_g.moveTo(i, chanBaseline);
				_g.lineTo(i, chanBaseline - (Math.abs(_bytes.readFloat()) * _waveHeight));
			}
		}
	}
}