var oCache = {
	iCacheLower: -1
};

function fnSetKey( aoData, sKey, mValue )
{
	for ( var i=0, iLen=aoData.length ; i<iLen ; i++ )
	{
		if ( aoData[i].name == sKey )
		{
			aoData[i].value = mValue;
		}
	}
}

function fnGetKey( aoData, sKey )
{
	for ( var i=0, iLen=aoData.length ; i<iLen ; i++ )
	{
		if ( aoData[i].name == sKey )
		{
			return aoData[i].value;
		}
	}
	return null;
}
  
function fnDataTablesPipeline ( sSource, aoData, fnCallback, oSettings ) {
	var iPipe = 5; /* Ajust the pipe size */
	
	var bNeedServer = false;
	var sEcho = fnGetKey(aoData, "sEcho");
	var iRequestStart = fnGetKey(aoData, "iDisplayStart");
	var iRequestLength = fnGetKey(aoData, "iDisplayLength");
	var iRequestEnd = iRequestStart + iRequestLength;
	oCache.iDisplayStart = iRequestStart;

	/* outside pipeline? */
	if ( oCache.iCacheLower < 0 || iRequestStart < oCache.iCacheLower || iRequestEnd > oCache.iCacheUpper )
	{
		bNeedServer = true;
	}
	
	/* sorting etc changed? */
	if ( oCache.lastRequest && !bNeedServer )
	{
		for( var i=0, iLen=aoData.length ; i<iLen ; i++ )
		{
			if ( aoData[i].name != "iDisplayStart" && aoData[i].name != "iDisplayLength" && aoData[i].name != "sEcho" )
			{
				if ( aoData[i].value != oCache.lastRequest[i].value )
				{
					bNeedServer = true;
					break;
				}
			}
		}
	}
	/* Store the request for checking next time around */
	oCache.lastRequest = aoData.slice();
	
	if ( bNeedServer )
	{
		if ( iRequestStart < oCache.iCacheLower )
		{
			iRequestStart = iRequestStart - (iRequestLength*(iPipe-1));
			if ( iRequestStart < 0 )
			{
				iRequestStart = 0;
			}
		}
		
		oCache.iCacheLower = iRequestStart;
		oCache.iCacheUpper = iRequestStart + (iRequestLength * iPipe);
		oCache.iDisplayLength = fnGetKey( aoData, "iDisplayLength" );
		fnSetKey( aoData, "iDisplayStart", iRequestStart );
		fnSetKey( aoData, "iDisplayLength", iRequestLength*iPipe );
		
		oSettings.jqXHR = $.getJSON( sSource, aoData, function (json) { 
			/* Callback processing */
			oCache.lastJson = jQuery.extend(true, {}, json);
			
			if ( oCache.iCacheLower != oCache.iDisplayStart )
			{
				json.aaData.splice( 0, oCache.iDisplayStart-oCache.iCacheLower );
			}
			json.aaData.splice( oCache.iDisplayLength, json.aaData.length );
			fnCallback(json)
		} );
	}
	else
	{
		json = jQuery.extend(true, {}, oCache.lastJson);
		json.sEcho = sEcho; /* Update the echo for each response */
		json.aaData.splice( 0, iRequestStart-oCache.iCacheLower );
		json.aaData.splice( iRequestLength, json.aaData.length );
		fnCallback(json);
		return;
	}
}
function numberFormat( data ) {
	if ( data < 1000 ) {
		return data;
	}
	var s=(data+""), a=s.split(".");
	var l=a[0], d=a[1];
	
	var s=(l+""), a=s.split(""), out="", iLen=s.length;
	for ( var i=0 ; i<iLen ; i++ ) {
		if ( i%3 === 0 && i !== 0 ) {
			out = ','+out;
		}
		out = a[iLen-i-1]+out;
	}
	if(d) out = out+"."+d;
	else out = out+".00";
	return out;
}
/* Formating function for row details */
function fnFormatDetails ( oTable, nTr )
{
	var aData = oTable.fnGetData( nTr );
	var sOut = '<table cellpadding="5" cellspacing="0" border="0" style="padding-left:50px;">';
	sOut += '<tr><td>Rendering engine:</td><td>'+aData[1]+' '+aData[4]+'</td></tr>';
	sOut += '<tr><td>Link to source:</td><td>Could provide a link here</td></tr>';
	sOut += '<tr><td>Extra info:</td><td>And any further details here (images etc)</td></tr>';
	sOut += '</table>';
	
	return sOut;
}
/* Table initialisation */
$(document).ready(function() {
	var oTable =$('#details').dataTable( {
		"oLanguage":{
			"sProcessing":   "Pretraga je u toku...",
	    	"sLengthMenu":   "_MENU_ rezultata po strani",
		    "sZeroRecords":  "Nije pronađen nijedan rezultat ili je broj rezultata veći od polovine",
		    "sInfo":         "Prikazano _START_ do _END_ od ukupno _TOTAL_ rezultata",
		    "sInfoEmpty":    "Prikazano 0 do 0 od ukupno 0 rezultata",
		    "sInfoFiltered": "(filtrirano od ukupno _MAX_ rezultata)",
		    "sInfoPostFix":  "",
		    "sSearch":       "Pretraga:",
		    "sUrl":          "",
		    "oPaginate": {
		        "sFirst":    "<<",
		        "sPrevious": "<",
		        "sNext":     ">",
		        "sLast":     ">>"
		    }
		},
		"bProcessing": true,
		"bServerSide": true,
		"bSortClasses": true,
		"bFilter": false,		
		"sAjaxSource": "/datatable.php",
		"sServerMethod": "POST",
		"fnServerData": fnDataTablesPipeline,
		//"bJQueryUI": true,
		"sPaginationType": "full_numbers",
		"sDom": '<"H"lrp>t<"F"ip>',					
		"aoColumns": [
			
		],
		//formatiranje iznosa
		"aoColumnDefs": [ {
			"aTargets": [  ],
			"mRender": function (data, type, full) {
			  if ( type === 'display' ) {
			    return numberFormat(data);
			  }
			  return data;
			}
		}],
		//default sorting column
		"aaSorting": [[,'']],
    	"fnFooterCallback": function( nFoot, aaData, iStart, iEnd, aiDisplay ) {
    	}		 
		
		//total po strani u footeru


	} );

} );