jQuery.extend({
	createUploadIframe: function(id, uri)
	{
			//create frame
            var frameId = 'jUploadFrame' + id;
            
            if(window.ActiveXObject) {
                var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
                if(typeof uri== 'boolean'){
                    io.src = 'javascript:false';
                }
                else if(typeof uri== 'string'){
                    io.src = uri;
                }
            }
            else {
                var io = document.createElement('iframe');
                io.id = frameId;
                io.name = frameId;
            }
            io.style.position = 'absolute';
            io.style.top = '-1000px';
            io.style.left = '-1000px';

            document.body.appendChild(io);

            return io			
    },
    createUploadForm: function(id, fileElementId)
	{
		//create form	
		var formId = 'jUploadForm' + id;
		var fileId = 'jUploadFile' + id;
		var form = $('<form  action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
		var oldElement = $('#' + fileElementId);
		var newElement = $(oldElement).clone();
		$(oldElement).attr('id', fileId);
		$(oldElement).before(newElement);
		$(oldElement).appendTo(form);
		//set attributes
		$(form).css('position', 'absolute');
		$(form).css('top', '-1200px');
		$(form).css('left', '-1200px');
		$(form).appendTo('body');		
		return form;
    },

    ajaxFileUpload: function(s) {
        // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout		
        s = jQuery.extend({}, jQuery.ajaxSettings, s);
        var id = new Date().getTime()        
		var form = jQuery.createUploadForm(id, s.fileElementId);
		var io = jQuery.createUploadIframe(id, s.secureuri);
		var frameId = 'jUploadFrame' + id;
		var formId = 'jUploadForm' + id;		
        // Watch for a new set of requests
        if ( s.global && ! jQuery.active++ )
		{
			jQuery.event.trigger( "ajaxStart" );
		}            
        var requestDone = false;
        // Create the request object
        var xml = {}   
        if ( s.global )
            jQuery.event.trigger("ajaxSend", [xml, s]);
        // Wait for a response to come back
		
        var uploadCallback = function(isTimeout)
		{			
			var io = document.getElementById(frameId);
            try 
			{			
				if(io.contentWindow)
				{
					
					 xml.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:null;
                	 xml.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
					 
				}else if(io.contentDocument)
				{
					 xml.responseText = io.contentDocument.document.body?io.contentDocument.document.body.innerHTML:null;
                	xml.responseXML = io.contentDocument.document.XMLDocument?io.contentDocument.document.XMLDocument:io.contentDocument.document;
				}						
            }catch(e)
			{
				
				jQuery.handleError(s, xml, null, e);
			}
            if ( xml || isTimeout == "timeout") 
			{				
                requestDone = true;
                var status;
                try {
                    status = isTimeout != "timeout" ? "success" : "error";
                    // Make sure that the request was successful or notmodified
                    if ( status != "error" )
					{
                        // process the data (runs the xml through httpData regardless of callback)
                        var data = jQuery.uploadHttpData( xml, s.dataType );    
                        // If a local callback was specified, fire it and pass it the data
                        if ( s.success )
                            s.success( data, status );
    
                        // Fire the global callback
                        if( s.global )
                            jQuery.event.trigger( "ajaxSuccess", [xml, s] );
                    } else
                        jQuery.handleError(s, xml, status);
                } catch(e) 
				{
                    status = "error";
                    jQuery.handleError(s, xml, status, e);
                }

                // The request was completed
                if( s.global )
                    jQuery.event.trigger( "ajaxComplete", [xml, s] );

                // Handle the global AJAX counter
                if ( s.global && ! --jQuery.active )
                    jQuery.event.trigger( "ajaxStop" );

                // Process result
                if ( s.complete )
                    s.complete(xml, status);

                jQuery(io).unbind()

                setTimeout(function()
									{	try 
										{
											$(io).remove();
											$(form).remove();	
											
										} catch(e) 
										{
											jQuery.handleError(s, xml, null, e);
										}									

									}, 100)

                xml = null

            }
        }
        // Timeout checker
        if ( s.timeout > 0 ) 
		{
            setTimeout(function(){
                // Check to see if the request is still happening
                if( !requestDone ) uploadCallback( "timeout" );
            }, s.timeout);
        }
        try 
		{
           // var io = $('#' + frameId);
			var form = $('#' + formId);
			$(form).attr('action', s.url);
			$(form).attr('method', 'POST');
			$(form).attr('target', frameId);
            if(form.encoding)
			{
                form.encoding = 'multipart/form-data';				
            }
            else
			{				
                form.enctype = 'multipart/form-data';
            }			
            $(form).submit();

        } catch(e) 
		{			
            jQuery.handleError(s, xml, null, e);
        }
        if(window.attachEvent){
            document.getElementById(frameId).attachEvent('onload', uploadCallback);
        }
        else{
            document.getElementById(frameId).addEventListener('load', uploadCallback, false);
        } 		
        return {abort: function () {}};	

    },

    uploadHttpData: function( r, type ) {
        var data = !type;
        data = type == "xml" || data ? r.responseXML : r.responseText;
        // If the type is "script", eval it in global context
        if ( type == "script" )
            jQuery.globalEval( data );
        // Get the JavaScript object, if JSON is used.
        if ( type == "json" )
            eval( "data = " + data );
        // evaluate scripts within html
        if ( type == "html" )
            jQuery("<div>").html(data).evalScripts();
			//alert($('param', data).each(function(){alert($(this).attr('value'));}));
        return data;
    }
})



$(document).bind("ready", UploadWorkReady);

function show_hide_text(obj) {

	var div = $(obj).parent().children('div');

	if ($(div).css('display') == 'none') $(div).css('display', 'block');
	else $(div).css('display', 'none');
}


function validateUploadWorkForm(form) {
	//clear all error messages
	$("div.error_msg").hide();
	$("div.error_msg_vis").hide();


	var error = false;
	var errorCount = 0;
	
	if ($("#rules").attr("checked")) {

		var value = $("#workName").val();
		if (value.length == 0) {
			errorCount++;
			$("#workName").next('div.error_msg').show();
		}
		
		value = $("#sourceFileId").val();
		if (value.length == 0) {
			errorCount++;
			$('#sourceFileId').parent('div').parent('div').children('div.error_msg').show();
		}
		
		value = $("#templateImageId").val();
		if (value.length == 0) {
			errorCount++;
			$('#templateImageId').parent('div').parent('div').children('div.error_msg').show();
		}
		
		value = $("#templateImageId").val();
		if (value.length == 0) {
			errorCount++;
			$('#templateImageId').parent('div').parent('div').children('div.error_msg').show();
		}
		
		value = $("#thumbImageId").val();
		if (value.length == 0) {
			errorCount++;
			$('#thumbImageId').parent('div').parent('div').children('div.error_msg').show();
		}
		
		value = $("#bigImageId").val();
		if (value.length == 0) {
			errorCount++;
			$('#bigImageId').parent('div').next('div.error_msg').show();
		}
		
		


		if (errorCount==0)
			document.contestform.submit();
		else
			jQuery.facebox('<div class="error">'+cmnlang['validate_form_error']+'</div>');
		return false;

		} else {
			$("#rules").focus();
			jQuery.facebox({ div: '#rulesCheckboxError'});
			
			return false;
		}	
	}


function UploadWorkReady() {


	function switchForm(obj) {
		$(obj).parent('div').parent('div').children('.loadForm').hide();
		$(obj).parent('div').parent('div').children('.loadedForm').show();
	}

	function switchBackForm(obj) {
		$(obj).parent('div').parent('div').children('.loadForm').show();
		$(obj).parent('div').parent('div').children('.loadedForm').hide();
	}

	$(".delFile").click( function() {
		$(this).prev('img').attr('src','');
		$(this).next('input').attr('value','');
		switchBackForm(this) 
	});
	
	
	$(".uploadButton").click( function () {
		obj = this;
		$(this).parent('div').parent('div').children('div.error_msg').hide();
		var uploadElem = $(this).parent('div.loadForm').children('input:file');
		
		
		$("#loading")
		.ajaxStart(function(){
			$(this).show();
		})
		.ajaxComplete(function(){
			$(this).hide();
		});
		
		if ($(uploadElem).val() != '')
		{
			$(obj).hide();
		
			var upload_input = $(uploadElem).attr('id');

			$.ajaxFileUpload
			(
				{
					url:'/ajaxupload.php?mod=uploadwork&fileInputName='+upload_input,
					secureuri:false,
					fileElementId:upload_input,
					dataType: 'json',
					success: function (data, status)
					{
						if(typeof(data.error) != 'undefined') {
							if (data.error != '') jQuery.facebox('<div class="error">'+data.error+'</div>');
							else {
								if (data.message == 'success') jQuery.facebox(cmnlang['fileupload_success']);
								$('#' + upload_input + '_preview').children('img').attr('src', data.fileinfo.file_path);
								$(obj).parent('div').parent('div').children('.loadedForm').children('img.preview').attr('src',data.fileinfo.file_path);
								$(obj).parent('div').parent('div').children('.loadedForm').children('input:hidden').val(data.fileinfo.file_name);
								$(obj).parent('div').parent('div').children('.loadedForm').children('span.uploadedfilename').text(data.fileinfo.file_name+' ('+data.fileinfo.file_size+')');
								switchForm(obj);
								
							}
						} else alert(cmnlang['unknown_error']);
						$(obj).show();
					},
					error: function (data, status, e)
					{
						alert(e);
						$(obj).show();
						//jQuery.facebox(e); 
						//switchForm(obj);
						
					}
				}
			)
		}
	});
	

	//$(".uploadButton").click( ajaxFileUpload());

	// нажатие на кнопке загрузки картинки
	/*$(".uploadButton").click( function () {

		obj = this;

		// IF PICTURE ALREADY WAS UPLOADED - GET HIS ID
		var uploaded_pic_id = parseInt(($(obj).parent('div').parent('div').children('.loadedForm').children('input:hidden').val()));

		var uploadElem = $(this).parent('div.loadForm').children('input:file');
		var uploadExts = $(this).parent('div.loadForm').children('.exts').val();

		if ($(uploadElem).val() != '')
		{
			$(obj).hide();
			
			var upload_input = $(uploadElem).attr('id');
			var ajax_url = '/ajaxupload.php?mod=uploadwork&fileElementName=' + upload_input + '&upid=' + uploaded_pic_id + '&exts=' + uploadExts;

			$.ajaxFileUpload (
			{
				url				: ajax_url,
				secureuri		: false,
				fileElementId	: upload_input,
				dataType		: 'json',
				success			:
				function (data, status) {

					if(typeof(data.error) != 'undefined') {
						if (data.error != '') alert(data.error);
						else {
							if (data.message == 'success') alert('Изображение успешно загружено');
							$('#' + upload_input + '_preview').children('img').attr('src', data.data.file_path);
							$(obj).parent('div').parent('div').children('.loadedForm').children('input:hidden').val(data.data.file_id);
							switchForm(obj);
						}
					} else alert('Неизвестная ошибка');
					$(obj).show();
				},
				error: function (data, status, e) { alert(e); $(obj).show(); }
			});
		}

	});*/
}