navigationLoadInProccess = false;

function startLoadNavigationData(){
	
	if(navigationLoadInProccess){
		return false;
	}
	
	navigationLoadInProccess = true;
	
	var overlay = $('advanced-navigation-overlay');
	
	if($$('div.category-products').length > 0){
	
    	var element = $$('div.category-products')[0];
    
    }else if($$('div.col-main p.note-msg')){
    
    	var element = $$('div.col-main p.note-msg')[0];
    
    }else{
    	
    	return;
    }
	
	if(!overlay){
		overlay = $(document.createElement('div'));
		overlay.id = 'advanced-navigation-overlay';
		document.body.appendChild(overlay);
	}
	
	var offsets = element.cumulativeOffset();
	overlay.setStyle({
		'top'	    : offsets[1] + 'px',
		'left'	    : offsets[0] + 'px',
		'width'	    : element.offsetWidth + 'px',
		'height'	: element.offsetHeight + 'px',
		'position'  : 'absolute',
		'display'   : 'block',
		'zIndex'	: '2000' // Value mast be more than any element from content have
	});
	
	var loadinfo = document.createElement('div');
	
	if(loadimagealign == 'bottom'){
	
		loadinfo.innerHTML = gomage_navigation_loadinfo_text+'<img src="'+loadimage+'" alt="" class="align-'+loadimagealign+'"/>';
	
	}else{
		
		loadinfo.innerHTML = '<img src="'+loadimage+'" alt="" class="align-'+loadimagealign+'"/>'+gomage_navigation_loadinfo_text;
		
	}
	
	loadinfo.id = "navigation_loadinfo";
	loadinfo.className = "gan-loadinfo";
	
	document.body.appendChild(loadinfo);
	
	return navigationLoadInProccess;
	
}

function stopLoadNavigationData(){
	
	var overlay = $('advanced-navigation-overlay');
	
	if(overlay){
		overlay.style.display = 'none';
	}
	
	document.body.removeChild($('navigation_loadinfo'));
	
	return navigationLoadInProccess = false;
	
}
	     
function generateUrlWithParams (url, params) {
	
	var query    = {},
		keys     = url.split('?')[1].split('&'),
		key      = '',
		glue     = '',
		strQuery = '',
		i        = -1;
	while (++i < keys.length) {
		key = keys[i].split('=');
		query[key[0]] = key[1];
	}
		
	for (attrname in query) { 
		if (!params.hasOwnProperty(attrname))
			params[attrname] = query[attrname]; 
	}	
	params['ajax'] = 0;

	for (key in params) {
		strQuery += glue + key + '=' + params[key];
		glue = '&';
	}
	if (strQuery != '') {
		url = url.split('?')[0] + '?' + strQuery;
	}
	return url;
}

function submitNavigationForm(form, url, is_ajax) {
	
	
	var from = $(form).down('input.navigation-from');
	var to = $(form).down('input.navigation-to');
	
	var re = /^[0-9]*$/;
	if (!re.test($(from).value))
	{
		alert('Please use only numbers (0-9) in this field.');
		return false;
	}	
	if (!re.test($(to).value))
	{
		alert('Please use only numbers (0-9) in this field.');
		return false;
	}
		
	if ((parseFloat($(from).value) > parseFloat($(to).value)) ||
		 ((parseFloat($(from).value) == 0 && parseFloat($(to).value) == 0)))
	{
		alert('Filter range is invalid.');
		return false;
	}
	
    is_ajax = typeof(is_ajax) != 'undefined' ? is_ajax : true;
    
	var url = url.replace(/&amp;/ig, '&');
	
	var elements = form.elements;
	
	try{
		if(navigationOpenFilters == undefined)
			navigationOpenFilters = {};
	}catch(e){
		navigationOpenFilters = {};
	}
	
	var params = Object.clone(navigationOpenFilters);	
	
	for(var i=0;i< elements.length;i++){
		
		element = elements[i];
		
		switch(element.nodeName){
			
			case 'INPUT': case 'SELECT': case 'TEXTAREA':
				
				if(element.value){
				
					params[element.name] = element.value;
				
				}
				
			break
			
		}
		
	}
	
	if(!url){
		url = form.action;
	}
	
	if (!is_ajax) {
		startLoadNavigationData();
		setLocation(generateUrlWithParams(url, params));
	} else if(startLoadNavigationData()){
	
	
	var request = new Ajax.Request(url,
	  {
	    method:'GET',
	    parameters:params,
	    onSuccess: function(transport){
	    	
	    	var response = eval('('+(transport.responseText || false)+')');
	    	
	    	replaceNavigationBlock(response.navigation);
			replaceProductsBlock(response.product_list);
			replaceLeftRightNavigationBlocks('gan-left-nav-main-container', response.navigation_left);
			replaceLeftRightNavigationBlocks('gan-right-nav-main-container', response.navigation_right);
			
			if(response.eval_js){
				eval(response.eval_js);
				navigation_eval_js = response.eval_js;
			}
						
			stopLoadNavigationData();
	      
	    },
	    onFailure: function(){
	    	stopLoadNavigationData();
	    }
	  });
	  
	}
	
}

function setNavigationUrl(url){
	is_ajax = typeof(is_ajax) != 'undefined' ? is_ajax : true;
	var url = url.replace(/&amp;/ig, '&');

	if(startLoadNavigationData()){

	var request = new Ajax.Request(url,
	  {
	    method:'get',
	    parameters:navigationOpenFilters,
	    onSuccess: function(transport){
	    	
	    	var response = eval('('+(transport.responseText || false)+')');
	    	
	    	replaceNavigationBlock(response.navigation);
			replaceProductsBlock(response.product_list);
			replaceLeftRightNavigationBlocks('gan-left-nav-main-container', response.navigation_left);
			replaceLeftRightNavigationBlocks('gan-right-nav-main-container', response.navigation_right);
						
			if(response.eval_js){
				eval(response.eval_js);
				navigation_eval_js = response.eval_js;
			}
			
			stopLoadNavigationData();
	      
	    },
	    onFailure: function(){
	    	setLocation(url); //trying redirect to url
	    }
	  });
	  
	}
	
}

function replaceProductsBlock(content){
	
	if($$('div.category-products').length > 0){

    	element = $$('div.category-products')[0];

    }else if($$('div.col-main p.note-msg').length > 0){

    	element = $$('div.col-main p.note-msg')[0];

    }else{

    	return;
    }



    if (content && content.toElement){

    	content = content.toElement();

    }else if (!Object.isElement(content)) {

      content = Object.toHTML(content);
      var tempElement = document.createElement('div');
      content.evalScripts.bind(content).defer();
      content = content.stripScripts();
      tempElement.innerHTML = content;


      el =  getElementsByClassName('category-products', tempElement);

      if (el.length > 0)
      {
         content = el[0];
      }
      else
      {
         el = getElementsByClassName('note-msg', tempElement);
         if (el.length > 0)
         {
            content = el[0];
         }
         else
         {
            return;
         }
      }

    }

    element.parentNode.replaceChild(content, element);
    
}



function getElementsByClassName(classname, node) {


      var a = [];

      var re = new RegExp('\\b' + classname + '\\b');

      var els = node.getElementsByTagName("*");

      for(var i=0,j=els.length; i<j; i++){

             if(re.test(els[i].className))a.push(els[i]);
      } 
      return a;

}


function replaceNavigationBlock(content){
	
	
    var element = $$('div.block-layered-nav')[0];
    
    if (content && content.toElement){
    	
    	content = content.toElement();
    	
    }else if (!Object.isElement(content)) {
    	
      content = Object.toHTML(content);
      
      var tempElement = document.createElement('div');
      content.evalScripts.bind(content).defer();
      tempElement.innerHTML = content;
      content = tempElement.firstChild;
      
    }
    
    element.parentNode.replaceChild(content, element);    
}


function replaceLeftRightNavigationBlocks(element, content)
{
	var element = $(element);
	
	if (content && element)
	{	
	    if (content && content.toElement){
		    	
		    	content = content.toElement();
		    	
		}else if (!Object.isElement(content)) {
		    	
		      content = Object.toHTML(content);
		      
		      var tempElement = document.createElement('div');
		      content.evalScripts.bind(content).defer();
		      tempElement.innerHTML = content;
		      content = tempElement.firstChild;
		      
		 }	    
		 element.parentNode.replaceChild(content, element);
	} 
}


function initSlider(code, min, max, curr_min, curr_max, url, is_ajax){
	
	if(min == max){
		max++;
		if(curr_min == curr_max){
			curr_max++;
		}
		
	}
	var handles = [code+'-handle-from', code+'-handle-to'];
	
	var s1 = new Control.Slider(handles,code+'-track', {axis:'horizontal',alignY:0, range: $R(min,max), sliderValue: [curr_min, curr_max],restricted: true,  spans: [code+"-square_slider_span"]});
	s1.options.onChange = function(value){
					
			if (isNaN(value[0]) || isNaN(value[1]))
		    {
		    	return false;
		    }

			$(code+'-filter-form').elements[code+'_from'].value = parseInt(value[0]);
			$(code+'-filter-form').elements[code+'_to'].value = parseInt(value[1]);			
			
			if(min == value[0] && max == value[1]){
				
				//setNavigationUrl(url);
				submitNavigationForm($(code+'-filter-form'), url, is_ajax);

			}else{
				
				submitNavigationForm($(code+'-filter-form'), url, is_ajax);
				
			}
			
			var htmlvalue = parseInt(value[0]) + ' - ' + parseInt(value[1]);
			
			if(value[0] >= 0 && value[1] >= 0){
			
			$(code+'-value-from').innerHTML = parseInt(1*value[0]);
			$(code+'-value-to').innerHTML = parseInt(1*value[1]);
			
			}
			
	        $(code+'-value').innerHTML = htmlvalue;
	        
	};
	
	
	
	s1.options.onSlide = function(value){
					    
		    if (isNaN(value[0]) || isNaN(value[1]))
		    {
		    	return false;
		    }	
		
			var htmlvalue = parseInt(value[0]) + ' - ' + parseInt(value[1]);
			
			
			if(value[0] >= 0 && value[1] >= 0){
			$(code+'-value-from').innerHTML = parseInt(1*value[0]);
			$(code+'-value-to').innerHTML = parseInt(1*value[1]);
			}
	        $(code+'-value').innerHTML = htmlvalue;
	};
	
	s1.draw = function(event)
	{
		var pointer = [Event.pointerX(event), Event.pointerY(event)];
	    var offsets = Position.cumulativeOffset(this.track);
	    pointer[0] -= this.offsetX + offsets[0];
	    pointer[1] -= this.offsetY + offsets[1];
	    this.event = event;
	        
	    var value = this.translateToValue( this.isVertical() ? pointer[1] : pointer[0] );
	    
	    if (isNaN(value)) return false;
	    
	    this.setValue(value);
	    
	    if (this.initialized && this.options.onSlide)
	      this.options.onSlide(this.values.length>1 ? this.values : this.value, this);
	};
	
	
	var htmlvalue = parseInt(s1.values[0]) + ' - ' + parseInt(s1.values[1]);
	
	$(code+'-value-from').innerHTML = parseInt(s1.values[0]);
	$(code+'-value-to').innerHTML = parseInt(s1.values[1]);
	
	$(code+'-value').innerHTML = htmlvalue;
	
	
	
	
}