//
// This method Gets URL Parameters (GUP)
//
var gup=function( name )
{
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var tmpURL = window.location.href;
  var results = regex.exec( tmpURL );
  if( results == null )
    return "";
  else
    return results[1];
}

//
// This method decodes the query parameters that were URL-encoded
//
var decode= function (strToDecode)
{
  var encoded = strToDecode;
  return unescape(encoded.replace(/\+/g,  " "));
}

var mt_mode;
var MT_setup = function (){
    mode_value=gup('mode');
    mt_mode = mode_value;

    submitURL="";
    if(mode_value=="AmazonMTsandbox"){
	submitURL="http://workersandbox.mturk.com/mturk/externalSubmit";
    }else if(mode_value=="AmazonMTproduction"){
	submitURL="http://www.mturk.com/mturk/externalSubmit";
    }else if(mode_value=="MT"){
	if (gup('assignmentId') == "ASSIGNMENT_ID_NOT_AVAILABLE")
	    {
		// If we're previewing, disable the button and give it a helpful message
		document.getElementById('submitButton').disabled = true;
		document.getElementById('submitButton').value = "You must ACCEPT the HIT before you can submit the results.";
		form.action = "http://www.mturk.com/mturk/externalSubmit";
	    }
	else
	    {
		var form = document.getElementById('MT_form');
		if (document.referrer && ( document.referrer.indexOf('workersandbox') != -1) )
		    {
			form.action = "http://workersandbox.mturk.com/mturk/externalSubmit";
		    }
	    }

    }else if(mode_value=="MT2"){
	submitURL="/mt/submit/";
    }else if(mode_value=="sandbox2"){
	submitURL="/mt/submit/";
    }else if(mode_value=="input"){
	submitURL="/mt/submit/";
    }
    param_submit_url=gup("submit_url");
    if(param_submit_url!="")
	{
	    $('MT_form').action=param_submit_url;
	}
    else
	{
	    $('MT_form').action=submitURL;
	}
    document.getElementById('assignmentId').value = gup('assignmentId');
    //
    // Check if the worker is PREVIEWING the HIT or if they've ACCEPTED the HIT
    //
    if (gup('assignmentId') == "ASSIGNMENT_ID_NOT_AVAILABLE")
    {
        // If we're previewing, disable the button and give it a helpful message
	document.getElementById('submitButton').disabled = true;
	document.getElementById('submitButton').value = "You must ACCEPT the HIT before you can submit the results.";
    } else {
    }

    extid=gup('extid');
    if(extid!="")
	{
	    $('MT_form')['extid'].value=extid;
	}

}


var MT_setup_instructions=function()
{
  instructions_URL=unescape(gup("instructions"));
  $('a_instructions').href=instructions_URL;
}

function create_flash_interface(swf,swf_w,swf_h,query_args){
  if (AC_FL_RunContent == 0) {
    alert("This page requires AC_RunActiveContent.js.");
  } else {
    $('flash_div').innerHTML=
      AC_FL_RunContent2(
	'codebase', 'http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0',
	'width', swf_w,
	'height', swf_h,
	'src', swf,
	'quality', 'high',
	'pluginspage', 'http://www.macromedia.com/go/getflashplayer',
	'align', 'middle',
	'play', 'true',
	'loop', 'true',
	'scale', 'showall',
	'wmode', 'window',
	'devicefont', 'false',
	'id', 'annotation_gui',
	'bgcolor', '#ffffff',
	'name', 'annotation_gui',
	'menu', 'true',
	'allowFullScreen', 'false',
	'allowScriptAccess','always',
	'movie', swf,
	'salign', '',
	'FlashVars', query_args
      ); //end AC code

  }
}



var active_task_resp;
var annotation_resp;
var parameters_resp;
var active_task_data;
var annotation_data;
var parameters_data;
var data_done=0;
var annotation_done=0;
var parameters_done=0;

var all_loaded_handler;

var mt_after_load = function()
{

  if(mt_mode=="input")
    {
      if(data_done && parameters_done)
      {
	all_loaded_handler();
      }
    }
  else if(mt_mode=="display")
    {
      if(data_done && parameters_done && annotation_done)
	{
	  all_loaded_handler();
	}

    }
}


var mt_onTaskXMLLoaded=function(transport)
{

    if (transport.responseXML)
	{
	    active_task_resp = transport;
	    active_task_data = transport.responseXML;
	    data_done=1;
	    mt_after_load();
	}
}


var mt_onAnnotationXMLLoaded=function(transport)
{
    if (transport.responseXML)
	{
	    annotation_resp = transport;
	    annotation_data = transport.responseXML;
	    annotation_done=1;
	    mt_after_load();

	}
}

var mt_onParametersXMLLoaded=function(transport)
{
    if (transport.responseXML)
	{
	    parameters_resp = transport;
	    parameters_data = transport.responseXML;
	    parameters_done=1;
	    mt_after_load();

	}
}


var mt_get_param=function (parameters_xml,parameter_name,default_value)
{
  var param_nodes=parameters_xml.getElementsByTagName(parameter_name);
  if(param_nodes.length>0)
  {
    return param_nodes[0].textContent;
  }else{
    return default_value;
  }

};



var mt_load_task_componentes =function(mode,completion_handler)
{
  all_loaded_handler=completion_handler;
  mt_mode=mode;
  parameters_url=decode(gup("parameters_url"));
  if(parameters_url!="")
    {
      var upd=new Ajax.Request(parameters_url, {
				 method: 'get',
				 onSuccess: mt_onParametersXMLLoaded
			       });
    }

  if(mode=="input")
  {

    data_url=decode(gup("data_url"));
    var upd=new Ajax.Request(data_url, {
			       method: 'get',
			       onSuccess: mt_onTaskXMLLoaded
			       });

  }
  else if(mode=="display" || mode=="edit" )
  {
    data_url=unescape(gup("data_url"));
    var upd=new Ajax.Request(data_url, {
			       method: 'get',
			       onSuccess: mt_onTaskXMLLoaded
			     });


    annotation_URL=unescape(gup("annotation_url"));
    var upd=new Ajax.Request(annotation_URL, {
			       method: 'get',
			       onSuccess: mt_onAnnotationXMLLoaded
			     });
  }


}


var mt_submit_handler=function (){
  var now=new Date();
  $('submit_time').value=now.toUTCString();
  return true;
}


var create_video_flash=function(id,src,w,h,play)
{
    swf='/code/video_display';
    swf_w=w;
    swf_h=h;
    query_args='video_url='+src;
    if(play=="play"){
	query_args+="&video_mode=play";
    }

    return AC_FL_RunContent2(
			     'codebase', 'http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0',
			     'width', swf_w,
			     'height', swf_h,
			     'src', swf,
			     'quality', 'high',
			     'pluginspage', 'http://www.macromedia.com/go/getflashplayer',
			     'align', 'middle',
			     'play', 'true"',
			     'loop', 'true',
			     'scale', 'showall',
			     'wmode', 'window',
			     'devicefont', 'false',
			     'id', 'annotation_gui',
			     'bgcolor', '#ffffff',
			     'name', 'annotation_gui',
			     'menu', 'true',
			     'allowFullScreen', 'false',
			     'allowScriptAccess','always',
			     'movie', swf,
			     'salign', '',
			     'FlashVars', query_args
			     ); //end AC code
}