/**
 * SoundManager 2: Javascript Sound for the Web
 * ----------------------------------------------
 * http://schillmania.com/projects/soundmanager2/
 *
 * Copyright (c) 2007, Scott Schiller. All rights reserved.
 * Code licensed under the BSD License:
 * http://www.schillmania.com/projects/soundmanager2/license.txt
 *
 * Flash 8 / ActionScript 2 version
 *
 * Compiling AS to Flash 8 SWF using MTASC (free compiler - http://www.mtasc.org/):
 * mtasc -swf soundmanager2.swf -main -header 16:16:30 SoundManager2.as -version 8
 *
 * ActionScript Sound class reference (Macromedia), documentation download:
 * http://livedocs.macromedia.com/flash/8/
 * Previously-live URL:
 * http://livedocs.macromedia.com/flash/8/main/wwhelp/wwhimpl/common/html/wwhelp.htm?context=LiveDocs_Parts&file=00002668.html
 *
 * *** NOTE ON LOCAL FILE SYSTEM ACCESS ***
 *
 * Flash security allows local OR network access, but not both
 * unless explicitly whitelisted/allowed by the flash player's
 * security settings.
 *
 * To enable in-flash messaging for troubleshooting, pass debug=1 in FlashVars (within object/embed code)
 * SM2 will do this by default when soundManager.debugFlash = true.
 *
 */

import flash.external.ExternalInterface; // woo

class SoundManager2 {

  static var app: SoundManager2;

  function SoundManager2() {

    var version = "V2.97a.20131201";
    var version_as = "(AS2/Flash 8)";

    /**
     *  Cross-domain security options
     *  HTML on foo.com loading .swf hosted on bar.com? Define your "HTML domain" here to allow JS+Flash communication to work.
     *  // allow_xdomain_scripting = true;
     *  // xdomain = "foo.com";
     *  For all domains (possible security risk?), use xdomain = "*"; which ends up as System.security.allowDomain("*");
     *  When loading from HTTPS, use System.security.allowInsecureDomain();
     *  See "allowDomain (security.allowDomain method)" in Flash 8/AS2 liveDocs documentation (AS2 reference -> classes -> security)
     *  download from http://livedocs.macromedia.com/flash/8/
     *  Related AS3 documentation: http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/flash/system/Security.html#allowDomain%28%29
     */

    var allow_xdomain_scripting = false;
    var xdomain = "*";

    if (allow_xdomain_scripting && xdomain) {
      System.security.allowDomain(xdomain);
      version_as += ' - cross-domain enabled';
    }

    // externalInterface references (for Javascript callbacks)
    var baseJSController = "soundManager";
    var baseJSObject = baseJSController + ".sounds";

    // internal objects
    var sounds = []; // indexed string array
    var soundObjects = []; // associative Sound() object array
    var timer = null;
    var pollingEnabled = false; // polling (timer) flag - disabled by default, enabled by JS->Flash call
    var debugEnabled = true; // Flash debug output enabled by default, disabled by JS call
    var flashDebugEnabled = false; // debug output to flash movie, off by default
    var didSandboxMessage = false;
    var caughtFatal = false;

    // for flash text output, debugging etc.
    var _messages = [];
    var _messageObj = null;
    flashDebugEnabled = (_root.debug == 1);

    // display stuffs
    Stage.scaleMode = 'noScale';
    Stage.align = 'TL';

    // context menu item with version info

    var doNothing = function() {}

    var sm2Menu:ContextMenu = new ContextMenu();
    var sm2MenuItem:ContextMenuItem = new ContextMenuItem('SoundManager ' + version + ' ' + version_as, doNothing);
    sm2MenuItem.enabled = false;
    sm2Menu.customItems.push(sm2MenuItem);
    _root.menu = sm2Menu;

    var writeDebug = function(s, logLevel) {
      // <d>
      if (!debugEnabled) return false;
      ExternalInterface.call(baseJSController + "['_writeDebug']", "(Flash): " + s, (logLevel || 0));
      // </d>
    }

    var flashDebug = function(messageText) {
      // <d>
      _messages.push(messageText);
      if (!flashDebugEnabled) {
        return false;
      }
      var sans = new TextFormat();
      sans.size = 12;
      sans.font = "Arial";

      // 320x240 if no stage dimensions (happens in IE, apparently 0 before stage resize event fires.)
      var w = Stage.width?Stage.width:320;
      var h = Stage.height?Stage.height:240;
      if (!_messageObj) {
        _messageObj = _root.createTextField("_messageObj", 0, 0, 0, w, h);
        _messageObj.x = 0;
        _messageObj.y = 0;
        _messageObj.multiline = true;
        _messageObj.html = true;
        _messageObj.wordWrap = true;
        _messageObj.align = 'left';
        _messageObj.autoSize = false;
      }
      _messageObj.htmlText = _messages.join('\n');
      _messageObj.setTextFormat(sans);
      _messageObj.width = w;
      _messageObj.height = h;
      // </d>
    }

    var _externalInterfaceTest = function(isFirstCall) {
      var sandboxType = System.security['sandboxType'];
      try {
        if (isFirstCall) {
          flashDebug('Testing Flash -&gt; JS...')
          if (!didSandboxMessage && sandboxType != 'remote' && sandboxType != 'localTrusted') {
            didSandboxMessage = true;
            flashDebug('<br><b>Fatal: Security sandbox error: Got "' + sandboxType + '", expected "remote" or "localTrusted".<br>Additional security permissions need to be granted.<br>See <a href="http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager04.html">flash security settings panel</a> for non-HTTP, eg. file:// use.</b><br>http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager04.html<br><br>You may also be able to right-click this movie and choose from the menu: <br>"Global Settings" -> "Advanced" tab -> "Trusted Location Settings"<br>');
          }
          ExternalInterface.call(baseJSController + "._externalInterfaceOK", version);
          if (!didSandboxMessage) {
            flashDebug('Flash -&gt; JS OK');
            flashDebug('Waiting for JS -&gt; Flash...');
          }
        } else {
          // writeDebug('SM2 SWF ' + version + ' ' + version_as, 1);
          ExternalInterface.call(baseJSController + "._setSandboxType", sandboxType);
          flashDebug('JS -&gt; Flash OK');
        }
      } catch(e) {
        flashDebug(e.toString());
        if (!caughtFatal) {
          caughtFatal = true;
        }
        return false;
      }
      return true; // to verify that a call from JS to here, works. (eg. JS receives "true", thus OK.)
    }

    var _disableDebug = function() {
      // prevent future debug calls from Flash going to client (maybe improve performance)
      writeDebug('_disableDebug()');
      debugEnabled = false;
    }

    var checkProgress = function() {
      var bL = 0;
      var bT = 0;
      var nD = 0;
      var nP = 0;
      var oSound = null;
      for (var i = 0, j = sounds.length; i < j; i++) {
        oSound = soundObjects[sounds[i]];
        bL = oSound.getBytesLoaded();
        bT = oSound.getBytesTotal();
        nD = oSound.duration || 0; // can sometimes be null with short MP3s? Wack.
        nP = oSound.position;
        if (bL && bT && bL != oSound.lastValues.bytes) {
          oSound.lastValues.bytes = bL;
          ExternalInterface.call(baseJSObject + "['" + oSound.sID + "']._whileloading", bL, bT, nD);
        }
        if (typeof nP != 'undefined' && nP != oSound.lastValues.position) {
          oSound.lastValues.position = nP;
          ExternalInterface.call(baseJSObject + "['" + oSound.sID + "']._whileplaying", nP);
          // if position changed, check for near-end
        }
      }
    }

    var onLoad = function(bSuccess) {
      checkProgress(); // ensure progress stats are up-to-date
      // force duration update (doesn't seem to be always accurate)
      ExternalInterface.call(baseJSObject + "['" + this.sID + "']._whileloading", this.getBytesLoaded(), this.getBytesTotal(), this.duration);
      ExternalInterface.call(baseJSObject + "['" + this.sID + "']._onload", this.duration > 0 ? 1 : 0); // bSuccess doesn't always seem to work, so check MP3 duration instead.
    }

    var onID3 = function() {
      // --- NOTE: BUGGY? ---
      // --------------------
      // TODO: Investigate holes in ID3 parsing - for some reason, Album will be populated with Date if empty and date is provided. (?)
      // ID3V1 seem to parse OK, but "holes" / blanks in ID3V2 data seem to get messed up (eg. missing album gets filled with date.)
      // iTunes issues: onID3 was not called with a test MP3 encoded with iTunes 7.01, and what appeared to be valid ID3V2 data.
      // May be related to thumbnails for album art included in MP3 file by iTunes. See http://mabblog.com/blog/?p=33
      var id3Data = [];
      var id3Props = [];
      for (var prop in this.id3) {
        id3Props.push(prop);
        id3Data.push(this.id3[prop]);
        // writeDebug('id3['+prop+']: '+this.id3[prop]);
      }
      ExternalInterface.call(baseJSObject + "['" + this.sID + "']._onid3", id3Props, id3Data);
      // unhook own event handler, prevent second call (can fire twice as data is received - ID3V2 at beginning, ID3V1 at end.)
      // Therefore if ID3V2 data is received, ID3V1 is ignored.
      soundObjects[this.sID].onID3 = null;
    }

    var registerOnComplete = function(sID) {
      soundObjects[sID].onSoundComplete = function() {
        checkProgress();
        ExternalInterface.call(baseJSObject + "['" + sID + "']._onfinish");
      }
    }

    var _setPosition = function(sID, nSecOffset, isPaused, _allowMultiShot) {
      // note: multiShot is Flash 9-only; retained so JS/Flash function signatures are identical.
      var s = soundObjects[sID];
      // writeDebug('_setPosition()');
      s.lastValues.position = s.position;
      if (s.lastValues.loops > 1 && nSecOffset != 0) {
        writeDebug('Warning: Looping functionality being disabled due to Flash limitation.', 240);
        s.lastValues.loops = 1;
      }
      s.start(nSecOffset, s.lastValues.nLoops || 1); // start playing at new position
      if (isPaused) {
        s.stop();
      }
    }

    var _load = function(sID, sURL, bStream, bAutoPlay, bCheckPolicyFile) {
      // writeDebug('_load(): '+sID+', '+sURL+', '+bStream+', '+bAutoPlay+', '+bCheckPolicyFile);
      if (typeof bAutoPlay == 'undefined') {
        bAutoPlay = false;
      }
      if (typeof bStream == 'undefined') {
        bStream = true;
      }
      if (typeof bCheckPolicyFile == 'undefined') {
        bCheckPolicyFile = false;
      }
      // writeDebug('bStream: '+bStream);
      // writeDebug('bAutoPlay: '+bAutoPlay);
      // checkProgress();
      var s = soundObjects[sID];
      s.onID3 = onID3;
      s.onLoad = onLoad;
      s.loaded = true;
      s.checkPolicyFile = bCheckPolicyFile;
      s.loadSound(sURL, bStream);
      if (bAutoPlay != true) {
        s.stop(); // prevent default auto-play behaviour
      } else {
        writeDebug('auto-play allowed');
      }
      registerOnComplete(sID);
    }

    var _unload = function(sID, sURL) {
      // effectively "stop" loading by loading a tiny MP3
      var s = soundObjects[sID];
      s.onID3 = null;
      s.onLoad = null;
      s.loaded = false;
      // ensure position is reset, if unload fails
      s.start(0,1);
      s.stop();
      s.loadSound(sURL, true);
      s.stop(); // prevent auto-play
    }

    var _createSound = function(sID, loops, checkPolicyFile) {
      var s = new Sound();
      if (!soundObjects[sID]) {
        sounds.push(sID);
      }
      soundObjects[sID] = s;
      s.setVolume(100);
      s.sID = sID;
      s.paused = false;
      s.loaded = false;
      s.checkPolicyFile = checkPolicyFile;
      s.lastValues = {
        bytes: 0,
        position: 0,
        nLoops: loops||1
      };
    }

    var _destroySound = function(sID) {
      // for the power of garbage collection! .. er, Greyskull!
      var s = (soundObjects[sID] || null);
      if (!s) {
        return false;
      }
      for (var i = 0; i < sounds.length; i++) {
        if (sounds[i] == sID) {
          sounds.splice(i, 1);
          break;
        }
      }
      s = null;
      delete soundObjects[sID];
    }

    var _stop = function(sID, bStopAll) {
      // stop this particular instance (or "all", based on parameter)
      if (bStopAll) {
        _root.stop();
      } else {
        soundObjects[sID].stop();
        soundObjects[sID].paused = false;
      }
    }

    var _start = function(sID, nLoops, nMsecOffset, _allowMultiShot) {
      // note: multiShot is Flash 9-only; retained so JS/Flash function signatures are identical.
      // writeDebug('_start: ' + sID + ', loops: ' + nLoops + ', nMsecOffset: ' + nMsecOffset);
      registerOnComplete();
      var s = soundObjects[sID];
      s.lastValues.paused = false; // reset pause if applicable
      s.lastValues.nLoops = (nLoops || 1);
      s.start(nMsecOffset, nLoops);
      return true;
    }

    var _pause = function(sID, _allowMultiShot) {
       // note: multiShot is Flash 9-only; retained so JS/Flash function signatures are identical.
      // writeDebug('_pause()');
      var s = soundObjects[sID];
      if (!s.paused) {
        // reference current position, stop sound
        s.paused = true;
        s.lastValues.position = s.position;
        // writeDebug('_pause(): position: '+s.lastValues.position);
        s.stop();
      } else {
        // resume playing from last position
        // writeDebug('resuming - playing at '+s.lastValues.position+', '+s.lastValues.nLoops+' times');
        s.paused = false;
        s.start(s.lastValues.position / 1000, s.lastValues.nLoops);
      }
    }

    var _setPan = function(sID, nPan) {
      soundObjects[sID].setPan(nPan);
    }

    var _setVolume = function(sID, nVol) {
      soundObjects[sID].setVolume(nVol);
    }

    var _setPolling = function(bPolling, timerInterval) {
      if (typeof timerInterval === 'undefined') {
        timerInterval = 50;
      }
      pollingEnabled = bPolling;
      if (timer == null && pollingEnabled) {
        flashDebug('Enabling polling, ' + timerInterval + ' ms interval');
        timer = setInterval(checkProgress, timerInterval);
      } else if (timer && !pollingEnabled) {
        flashDebug('Disabling polling');
        clearInterval(timer);
        timer = null;
      }
    }

    var _init = function() {

      // OK now stuff should be available
      try {
        flashDebug('Adding ExternalInterface callbacks...');
        ExternalInterface.addCallback('_load', this, _load);
        ExternalInterface.addCallback('_unload', this, _unload);
        ExternalInterface.addCallback('_stop', this, _stop);
        ExternalInterface.addCallback('_start', this, _start);
        ExternalInterface.addCallback('_pause', this, _pause);
        ExternalInterface.addCallback('_setPosition', this, _setPosition);
        ExternalInterface.addCallback('_setPan', this, _setPan);
        ExternalInterface.addCallback('_setVolume', this, _setVolume);
        ExternalInterface.addCallback('_setPolling', this, _setPolling);
        ExternalInterface.addCallback('_externalInterfaceTest', this, _externalInterfaceTest);
        ExternalInterface.addCallback('_disableDebug', this, _disableDebug);
        ExternalInterface.addCallback('_createSound', this, _createSound);
        ExternalInterface.addCallback('_destroySound', this, _destroySound);
      } catch(e) {
        flashDebug('Fatal: ExternalInterface error: ' + e.toString());
      }
      // try to talk to JS, do init etc.
      _externalInterfaceTest(true);
      // flashDebug('Init OK');
    }

    flashDebug('SM2 SWF ' + version + ' ' + version_as);

    if (ExternalInterface.available) {
      flashDebug('ExternalInterface available');
      _init();
    } else {
      // d'oh! - may be from a corrupt install, ancient (pre-Netscape 6?) browser etc.
      flashDebug('Fatal: ExternalInterface (Flash &lt;-&gt; JS) not available');
    }


  } // SoundManager2()

  // entry point
  static function main(mc) {
    app = new SoundManager2();
  }

}