// Generated by CoffeeScript 1.8.0
(function() {
  var URL, context, ctx, drawSpectrum, gradient, javascriptNode, loadSound, onError, playSound, setupAudioNodes, sourceNode;

  URL = "Gesaffelstein%20&%20Jesper%20Kyd%20-%20In%20Pursuit%20for%20Ezio%27s%20Family.ogg";

  if (!window.AudioContext) {
    if (!window.webkitAudioContext) {
      alert("Nie znaleziono obsługi dla AudioContext!");
    }
    window.AudioContext = window.webkitAudioContext;
  }

  context = new AudioContext();

  ctx = $("#music").get()[0].getContext("2d");

  gradient = ctx.createLinearGradient(0, 0, 0, 325);

  javascriptNode = 0;

  sourceNode = 0;

  gradient.addColorStop(1, "#FFFFFF");

  gradient.addColorStop(0.75, "#00FFFF");

  gradient.addColorStop(0.25, "#0000FF");

  gradient.addColorStop(0, "#000000");

  setupAudioNodes();

  setupAudioNodes = function() {
    var analyser;
    javascriptNode = context.createScriptProcessor(2048, 1, 1);
    javascriptNode.connect(context.destination);
    analyser = context.createAnalyser();
    analyser.smoothingTimeConstant = 0.75;
    analyser.fftsize = 512;
    sourceNode = context.createBufferSource();
    sourceNode.connect(analyser);
    analyser.connect(javascriptNode);
    sourceNode.connect(context.destination);
  };

  loadSound = function(url) {
    var request;
    request = new XMLHttpRequest();
    request.open("GET", url, true);
    request.responseType = "arraybuffer";
    request.onload = function() {
      context.decodeAudioData(request.response, function(buffer) {
        playSound(buffer);
      }, onError);
    };
    request.send();
  };

  playSound = function(buffer) {
    sourceNode.buffer = buffer;
    sourceNode.start(0);
  };

  onError = function(e) {
    console.log(e);
  };

  javascriptNode.onaudioprocess = function() {
    var array;
    array = new Uint8Array(analyser.frequencyBinCount);
    analyser.getByteFrequencyData(array);
    ctx.clearRect(0, 0, 1024, 325);
    ctx.fillStyle = gradient;
    drawSpectrum(array);
  };

  drawSpectrum = function(array) {
    var i, val;
    i = 0;
    while (i < array.length) {
      val = array[i];
      ctx.fillRect(i * 5, 325 - val, 3, 325);
    }
  };

  $(document).ready(function() {
    $.ajax({
      url: URL,
      success: function() {
        $("#play_button").show();
      }
    });
  });

  loadSound(URL);

}).call(this);