// DATA_TEMPLATE: empty_table
oTest.fnStart( "fnHeaderCallback" );

$(document).ready( function () {
	/* Check the default */
	var oTable = $('#example').dataTable( {
		"sAjaxSource": "../../../examples/ajax/sources/objects.txt",
		"aoColumns": [
			{ "mDataProp": "engine" },
			{ "mDataProp": "browser" },
			{ "mDataProp": "platform" },
			{ "mDataProp": "version" },
			{ "mDataProp": "grade" }
		]
	} );
	var oSettings = oTable.fnSettings();
	var mPass, bInit;
	
	oTest.fnWaitTest( 
		"Default should be null",
		null,
		function () { return oSettings.fnHeaderCallback == null; }
	);
	
	
	oTest.fnWaitTest( 
		"Five arguments passed",
		function () {
			oSession.fnRestore();
			
			mPass = -1;
			bInit = false;
			$('#example').dataTable( {
				"sAjaxSource": "../../../examples/ajax/sources/objects.txt",
				"aoColumnDefs": [
					{ "mDataProp": "engine", "aTargets": [0] },
					{ "mDataProp": "browser", "aTargets": [1] },
					{ "mDataProp": "platform", "aTargets": [2] },
					{ "mDataProp": "version", "aTargets": [3] },
					{ "mDataProp": "grade", "aTargets": [4] }
				],
				"fnHeaderCallback": function ( ) {
					mPass = arguments.length;
				},
				"fnInitComplete": function () {
					bInit = true;
				}
			} );
		},
		function () { return mPass == 5 && bInit; }
	);
	
	
	/* The header callback is called once for the init and then when the data is added */
	oTest.fnWaitTest( 
		"fnHeaderCallback called once per draw",
		function () {
			oSession.fnRestore();
			
			mPass = 0;
			bInit = false;
			$('#example').dataTable( {
				"sAjaxSource": "../../../examples/ajax/sources/objects.txt",
				"aoColumnDefs": [
					{ "mDataProp": "engine", "aTargets": [0] },
					{ "mDataProp": "browser", "aTargets": [1] },
					{ "mDataProp": "platform", "aTargets": [2] },
					{ "mDataProp": "version", "aTargets": [3] },
					{ "mDataProp": "grade", "aTargets": [4] }
				],
				"fnHeaderCallback": function ( nHead, aasData, iStart, iEnd, aiDisplay ) {
					mPass++;
				},
				"fnInitComplete": function () {
					bInit = true;
				}
			} );
		},
		function () { return mPass == 2 && bInit; }
	);
	
	oTest.fnWaitTest( 
		"fnRowCallback called on paging (i.e. another draw)",
		function () { $('#example_next').click(); },
		function () { return mPass == 3; }
	);
	
	
	oTest.fnWaitTest( 
		"fnRowCallback allows us to alter row information",
		function () {
			oSession.fnRestore();
			$('#example').dataTable( {
				"sAjaxSource": "../../../examples/ajax/sources/objects.txt",
				"aoColumnDefs": [
					{ "mDataProp": "engine", "aTargets": [0] },
					{ "mDataProp": "browser", "aTargets": [1] },
					{ "mDataProp": "platform", "aTargets": [2] },
					{ "mDataProp": "version", "aTargets": [3] },
					{ "mDataProp": "grade", "aTargets": [4] }
				],
				"fnHeaderCallback": function ( nHead, aasData, iStart, iEnd, aiDisplay ) {
					nHead.getElementsByTagName('th')[0].innerHTML = "Displaying "+(iEnd-iStart)+" records";
				}
			} );
		},
		function () { return $('#example thead th:eq(0)').html() == "Displaying 10 records"; }
	);
	
	
	oTest.fnWaitTest( 
		"iStart correct on first page",
		function () {
			oSession.fnRestore();
			
			mPass = true;
			$('#example').dataTable( {
				"sAjaxSource": "../../../examples/ajax/sources/objects.txt",
				"aoColumnDefs": [
					{ "mDataProp": "engine", "aTargets": [0] },
					{ "mDataProp": "browser", "aTargets": [1] },
					{ "mDataProp": "platform", "aTargets": [2] },
					{ "mDataProp": "version", "aTargets": [3] },
					{ "mDataProp": "grade", "aTargets": [4] }
				],
				"fnHeaderCallback": function ( nHead, aasData, iStart, iEnd, aiDisplay ) {
					if ( iStart != 0 )
					{
						mPass = false;
					}
				}
			} );
		},
		function () { return mPass; }
	);
	
	
	oTest.fnWaitTest( 
		"iStart correct on second page",
		function () {
			oSession.fnRestore();
			
			mPass = false;
			$('#example').dataTable( {
				"sAjaxSource": "../../../examples/ajax/sources/objects.txt",
				"aoColumnDefs": [
					{ "mDataProp": "engine", "aTargets": [0] },
					{ "mDataProp": "browser", "aTargets": [1] },
					{ "mDataProp": "platform", "aTargets": [2] },
					{ "mDataProp": "version", "aTargets": [3] },
					{ "mDataProp": "grade", "aTargets": [4] }
				],
				"fnHeaderCallback": function ( nHead, aasData, iStart, iEnd, aiDisplay ) {
					if ( iStart == 10 )
					{
						mPass = true;
					}
				},
				"fnInitComplete": function () {
					$('#example_next').click();
				}
			} );
		},
		function () { return mPass; }
	);
	
	
	oTest.fnWaitTest( 
		"iEnd correct on second page",
		function () {
			oSession.fnRestore();
			
			mPass = false;
			$('#example').dataTable( {
				"sAjaxSource": "../../../examples/ajax/sources/objects.txt",
				"aoColumnDefs": [
					{ "mDataProp": "engine", "aTargets": [0] },
					{ "mDataProp": "browser", "aTargets": [1] },
					{ "mDataProp": "platform", "aTargets": [2] },
					{ "mDataProp": "version", "aTargets": [3] },
					{ "mDataProp": "grade", "aTargets": [4] }
				],
				"fnHeaderCallback": function ( nHead, aasData, iStart, iEnd, aiDisplay ) {
					if ( iEnd == 20 )
					{
						mPass = true;
					}
				},
				"fnInitComplete": function () {
					$('#example_next').click();
				}
			} );
		},
		function () { return mPass; }
	);
	
	
	oTest.fnWaitTest( 
		"aiDisplay length is full data when not filtered",
		function () {
			oSession.fnRestore();
			
			mPass = false;
			$('#example').dataTable( {
				"sAjaxSource": "../../../examples/ajax/sources/objects.txt",
				"aoColumnDefs": [
					{ "mDataProp": "engine", "aTargets": [0] },
					{ "mDataProp": "browser", "aTargets": [1] },
					{ "mDataProp": "platform", "aTargets": [2] },
					{ "mDataProp": "version", "aTargets": [3] },
					{ "mDataProp": "grade", "aTargets": [4] }
				],
				"fnHeaderCallback": function ( nHead, aasData, iStart, iEnd, aiDisplay ) {
					if ( aiDisplay.length == 57 )
					{
						mPass = true;
					}
				}
			} );
		},
		function () { return mPass; }
	);
	
	oTest.fnWaitTest( 
		"aiDisplay length is 9 when filtering on 'Mozilla'",
		function () {
			oSession.fnRestore();
			
			mPass = false;
			oTable = $('#example').dataTable( {
				"sAjaxSource": "../../../examples/ajax/sources/objects.txt",
				"aoColumnDefs": [
					{ "mDataProp": "engine", "aTargets": [0] },
					{ "mDataProp": "browser", "aTargets": [1] },
					{ "mDataProp": "platform", "aTargets": [2] },
					{ "mDataProp": "version", "aTargets": [3] },
					{ "mDataProp": "grade", "aTargets": [4] }
				],
				"fnHeaderCallback": function ( nHead, aasData, iStart, iEnd, aiDisplay ) {
					if ( aiDisplay.length == 9 )
					{
						mPass = true;
					}
				}
			} );
			oTable.fnFilter( "Mozilla" );
		},
		function () { return mPass; }
	);
	
	
	
	oTest.fnComplete();
} );