if('function' === typeof importScripts) {
  importScripts('./jsnes.min.js');
}
var SCREEN_WIDTH = 256;
var SCREEN_HEIGHT = 240;
var FRAMEBUFFER_SIZE = SCREEN_WIDTH * SCREEN_HEIGHT;
var framebuffer_u8, framebuffer_u32;

var AUDIO_BUFFERING = 512;
var SAMPLE_COUNT = 4 * 1024;
var SAMPLE_MASK = SAMPLE_COUNT - 1;
var audio_samples_L = new Float32Array(SAMPLE_COUNT);
var audio_samples_R = new Float32Array(SAMPLE_COUNT);
var audio_write_cursor = 0
  , audio_read_cursor = 0;
var netmode = false;

var nes = new jsnes.NES({
  onFrame: function(framebuffer_24) {
    for (var i = 0; i < FRAMEBUFFER_SIZE; i++)
      framebuffer_u32[i] = 0xFF000000 | framebuffer_24[i];
  },
  onAudioSample: function(l, r) {
    audio_samples_L[audio_write_cursor] = l;
    audio_samples_R[audio_write_cursor] = r;
    audio_write_cursor = (audio_write_cursor + 1) & SAMPLE_MASK;
  },
});

function keyboard(callback, event, p) {
  var player = p || 1;
  switch (event.keyCode) {
    case 38:
      // UP
      callback(player, jsnes.Controller.BUTTON_UP);
      break;
    case 40:
      // Down
      callback(player, jsnes.Controller.BUTTON_DOWN);
      break;
    case 37:
      // Left
      callback(player, jsnes.Controller.BUTTON_LEFT);
      break;
    case 39:
      // Right
      callback(player, jsnes.Controller.BUTTON_RIGHT);
      break;
    case 65:
    // 'a' - qwerty, dvorak
    case 81:
      // 'q' - azerty
      callback(player, jsnes.Controller.BUTTON_A);
      break;
    case 83:
    // 's' - qwerty, azerty
    case 79:
      // 'o' - dvorak
      callback(player, jsnes.Controller.BUTTON_B);
      break;
    case 9:
      // Tab
      callback(player, jsnes.Controller.BUTTON_SELECT);
      break;
    case 13:
      // Return
      callback(player, jsnes.Controller.BUTTON_START);
      break;
    default:
      break;
  }
}
onmessage = function(event) {
  switch (event.data.f) {
    case 'nesloadROM':
      nes.loadROM(event.data.data);

      if (netmode === false) {
        setInterval(function() {
          nes.frame();
          postMessage({
            f: "frame",
            data: {
              framebuffer_u8: framebuffer_u8,
              audio_samples_L: audio_samples_L,
              audio_samples_R: audio_samples_R,
              audio_read_cursor: audio_read_cursor,
            }
          });
        }, 1000 / 60)
      }
      break;
    case 'updateframe':
      nes.frame();
      postMessage({
        f: "frame",
        data: {
          framebuffer_u8: framebuffer_u8,
          audio_samples_L: audio_samples_L,
          audio_samples_R: audio_samples_R,
          audio_read_cursor: audio_read_cursor,
        }
      });
      break;
    case 'netmode':
      netmode = event.data.data;
      break;
    case 'setBuffer':
      var buffer = new ArrayBuffer(event.data.data);
      framebuffer_u8 = new Uint8ClampedArray(buffer);
      framebuffer_u32 = new Uint32Array(buffer);
      break;
    case 'keypad':
      if (event.data.data.action === "keydown") {
        keyboard(nes.buttonDown, event.data.data)
      } else {
        keyboard(nes.buttonUp, event.data.data)
      }
      break;
    case 'netkeypad':
      if (event.data.data.keyaction === "keydown") {
        keyboard(nes.buttonDown, event.data.data, event.data.data.player)
      } else {
        keyboard(nes.buttonUp, event.data.data, event.data.data.player)
      }
      break;
    case 'netframe':
      nes.frame();
      postMessage({
        f: "frame",
        data: {
          framebuffer_u8: framebuffer_u8,
          audio_samples_L: audio_samples_L,
          audio_samples_R: audio_samples_R,
          audio_read_cursor: audio_read_cursor,
        }
      });
      break;
    case 'save':
      var currData = nes.toJSON();
      var saveData = JSON.stringify(currData);
      postMessage({
        f: "saveData",
        data: saveData
      });
      break;
    case 'load':
      var decodedData = event.data.data;
      console.log(decodedData);
      nes.fromJSON(decodedData);
      break;
    case 'reload':
      nes.reloadROM();
      break;
  }
  //console.log('11Received message ' + event.data);
  // doSomething();
}