var SRL = {};
SRL.ajax = (window.XMLHttpRequest) ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHTTP');
SRL.id = 0;
SRL.relatedLeft = new Array();
SRL.relatedRight = new Array();
SRL.baseUrl = '../wp-content/plugins/simple-related-links/simple-related-links-backend.php';
SRL.pageIndex = 1;

SRL.loadArchive  = function (category, page, base) {
	try {
		WPOL.q('srl_archive_loading').style.display = 'block';
		
		var url =  base + '/wp-content/plugins/simple-related-links/simple-related-links-backend.php?action=get_archive&category=' + category + "&page=" + page;
		WPOL.send('GET', url, null, function() {
			if(WPOL.ajax.readyState == 4) {
				var result = JSON.parse(WPOL.ajax.responseText);
				var category = WPOL.q('srl_archive');
				category.innerHTML = '';
				var items = '';
				var total = 0;
				for (var item in result) {
					if (result[item].url != undefined) {
						items += "<li><a href=\"" + result[item].url + "\">" + result[item].title + "</a></li>";
					} else {
						total = parseInt(result[item]);
					}
				}											
				category.innerHTML = items;					

				// prepare navigation panel
				if (total > 1) {
					SRL.pageIndex = page;
					WPOL.q('srl_archive_navigation').style.display = 'block';
					var pages = total / 10;
					if (Math.floor(pages) >= page) {
						WPOL.q('srl_archive_newer').style.display = (page > 1) ? 'block' : 'none';
						WPOL.q('srl_archive_older').style.display = (page < Math.floor(pages)) ? 'block' : 'none';	
					}	
				}

				WPOL.q('srl_archive_loading').style.display = 'none';
			}
		});
	}
	catch (e) {
		WPOL.debug(e);
		var loading = WPOL.q('srl_archive_loading');
		if (loading) {
			loading.style.display = 'none';
		}
	}
};
SRL.load  = function (type) {
	try {
		WPOL.loading(true);
				  			
		var action = (type == 1) ? 'get_categories' : 'get_posts';
		var url = SRL.baseUrl + '?action=' + action;
		WPOL.send('GET', url, null, function() {
			if(WPOL.ajax.readyState == 4) {
				var result = JSON.parse(WPOL.ajax.responseText);
				var category = WPOL.q('srl_id');
				category.innerHTML = '';
				for (var item in result) {
					category.options[category.options.length] = new Option(result[item], item)
				}																
				WPOL.loading(false);						
			}
		});
	}
	catch (e) {
		WPOL.debug(e);
		WPOL.loading(false);
	}
};
SRL.setId = function(type) {
	var category = WPOL.q('srl_id');
	if (category) {
		if (category.options[category.selectedIndex]) {
			var categoryId = category.options[category.selectedIndex].value;
			if (categoryId > 0) {  				
			  	SRL.id = categoryId;
					  	
			  	// clean data
			  	SRL.relatedLeft = new Array();
			  	SRL.relatedRight = new Array();
			  	SRL.render(2);
			  	SRL.render(1);
					  	
			  	// get data from server
				try {
			  		WPOL.loading(true);
		  			  		
		  			var action = (type == 1) ? 'get_category' : 'get_post';
			  		var url = SRL.baseUrl + '?action=' + action + '&id=' + SRL.id;
			  		WPOL.send('GET', url, null, function() {
						if(WPOL.ajax.readyState == 4) {
							if (WPOL.ajax.responseText != '') {
					  			var parts = WPOL.ajax.responseText.split('^');	
						  		for (var x = 0; x < 2; x++) {				
					  				var fixed = WPOL.replaceAll(parts[x], '\\', '');
						  			var result = JSON.parse(fixed);							  		
						  			if (result != null) {					  			
						  				if (x == 0) {
					  						SRL.relatedLeft = result;
						  					SRL.render(1);
						  				} else {							  			
						  					SRL.relatedRight = result;
						  					SRL.render(2);
					  					}						  										
									}
								}
							}	
							WPOL.loading(false);					
						}
					});
				}
				catch (e) {
					WPOL.debug(e);
					WPOL.loading(false);
				}
			}
		}
	}
};
SRL.search = function() {
	try {
		var query = WPOL.q('srl_q');
		var typeElement = WPOL.q('srl_where'); 
		WPOL.loading(true);
			
		var type = typeElement.options[typeElement.selectedIndex].value;
	  	var url = SRL.baseUrl + '?action=search&type=' + type + '&q=' + query.value;  				
		WPOL.send('GET', url, null, function() {
			if(WPOL.ajax.readyState == 4) {
		  		var output = '<p>Nebyl nalezen žádný obsah.</p>'; 
		  		if (WPOL.ajax.responseText != '[]') {
		  			output = SRL.renderSearchResult(JSON.parse(WPOL.ajax.responseText));
				}							
				WPOL.q('srl_search_results').innerHTML = output;
				WPOL.loading(false);
			}
		});
	}
	catch (e) {
		WPOL.debug(e);
		WPOL.loading(false);
	}
};
SRL.render = function (side) {
	if (side == 1) {
		WPOL.q('srl_panel_body_left').innerHTML = SRL.renderList(1, SRL.relatedLeft);;
	} else if (side == 2) {
		WPOL.q('srl_panel_body_right').innerHTML = SRL.renderList(2, SRL.relatedRight);
	}
};
SRL.add = function (side, postID, title) {
	var category = WPOL.q('srl_id');
	if (SRL.id > 0 || category.selectedIndex > 0) {
		var val = null;
		if (title == 'break') {
			var count = (side == 1) ? SRL.relatedLeft.length : SRL.relatedRight.length;
			val = (count + 1) + '|' + title;
		} else {
			val = postID + '|' + title;
		}
		if (side == 1) {
			if (!WPOL.searchArray(val, SRL.relatedLeft)) {
				SRL.relatedLeft.push(val);
			  	SRL.render(side);
			} else {
				alert('Tento odkaz je již přidán!');
			}
		} else if (side == 2) {
			if (!WPOL.searchArray(val, SRL.relatedRight)) {
				SRL.relatedRight.push(val);
				SRL.render(side);
			} else {
				alert('Tento odkaz je již přidán!');
			}
		}    
	} else {
		alert('Zvolte rubriku, se kterou chcete pracovat.');
		category.focus();
	}
};
SRL.removeLink = function (side, postID, title) {
	if (confirm('Opravdu si přejete odstranit tento odkaz?')) {
		var val = postID + '|' + title;
		if (side == 1) {
		  	if (WPOL.searchArray(val, SRL.relatedLeft)) {
		  		SRL.relatedLeft = WPOL.removeFromArray(val, SRL.relatedLeft);
		  		SRL.render(side);
			}
		} else if (side == 2) {
		    if (WPOL.searchArray(val, SRL.relatedRight)) {
		    	SRL.relatedRight = WPOL.removeFromArray(val, SRL.relatedRight);
		    	SRL.render(side);
			}
		}
	}
	
	return false;
};
SRL.removeBreak = function (side, index) {
	if (confirm('Opravdu si přejete odstranit tuto mezeru?')) {
		var val = index + '|break';
		if (side == 1) {
		  	if (WPOL.searchArray(val, SRL.relatedLeft)) {
		  		SRL.relatedLeft = WPOL.removeFromArray(val, SRL.relatedLeft);
		  		SRL.render(side);
			}
		} else if (side == 2) {
		    if (WPOL.searchArray(val, SRL.relatedRight)) {
		    	SRL.relatedRight = WPOL.removeFromArray(val, SRL.relatedRight);
		    	SRL.render(side);
			}
		}
	}
	
	return false;
};
SRL.validateSave = function() {
	var category = WPOL.q('srl_id');
	var retVal = true;
	if (category.selectedIndex <= 0 || SRL.id == 0) {
		alert('Zvolte rubriku, ve které se má obsah zobrazovat.');
		category.focus();
		retVal = false;
	} else {
		SRL.id = category.options[category.selectedIndex].value;
	}
		    
	return retVal;
};
SRL.save = function(type) {
	try {
		if (SRL.validateSave()) {
			WPOL.loading(true);

			// serialize to JSON
			var data = JSON.stringify(SRL.relatedLeft) + '^' + JSON.stringify(SRL.relatedRight);
			var action = (type == 1) ? 'add_category' : 'add_post';
			var url = SRL.baseUrl + '?action=' + action + '&id=' + SRL.id;
			WPOL.send('POST', url, 'data=' + data, function() {
				if(WPOL.ajax.readyState == 4) {
					var result = WPOL.ajax.responseText;
					if (result == 'updated') {
						SRL.load(type);
						alert('Související/témata byla úspěšně uložena.');					  	
					}							
					WPOL.loading(false);
				}
			});
		}
	}
	catch (e) {
		WPOL.debug(e);
		WPOL.loading(false);
	}
};
SRL.catchEnter = function (e) {
	if (!e) var e = window.event
	if (e.keyCode) code = e.keyCode;
	else if (e.which) code = e.which;
		
	if(code == 13) {    	
		SRL.search();
		e.cancelBubble = true;
		if (e.stopPropagation) e.stopPropagation();
		return false;
	} else {
		return true;
	}
};
		  
// helpers
SRL.renderList = function (type, data) {
	var list = '<ol style="padding-left:10px;">';
	var color = (type == 1) ? '#000' : '#fff'; 
	for (var z = 0; z < data.length;z++) {
		var parts = data[z].split('|');
		if (parts[1] == 'break') {
			list += '<li style="padding-top:3px;"><a href="#" style="color:' + color + '" title="Kliknutím odstraníte mezeru" onclick="return SRL.removeBreak(' + type + ', ' + parts[0] + ');">(mezera)</a></li>';
		} else {
			list += '<li style="padding-top:3px;"><a href="#" style="color:' + color + '" title="Kliknutím odstraníte odkaz" onclick="return SRL.removeLink(' + type + ', ' + parts[0] + ', \'' + parts[1] + '\');">' + parts[1] + '</a></li>';
		}
	}
			
	return  list + '</ol>';		  	
};
SRL.renderSearchResult = function (data) {
	var list = '<ol>';
	for (var id in data) {
		var item = data[id];
		list += '<li class="srl_search_result_list">';
		list += '<a href="#" title="Kliknutím přídáte odkaz mezi Související vybrané rubriky" onclick="SRL.add(1, ' + id + ', \'' + item.title + '\');"><img src="../wp-content/plugins/simple-related-links/media/add_souvisejici.gif" border="0" /></a>';
		list += '<a href="#" title="Kliknutím přídáte odkaz mezi Témata vybrané rubriky" onclick="SRL.add(2, ' + id + ', \'' + item.title + '\');"><img src="../wp-content/plugins/simple-related-links/media/add_temata.gif" border="0" /></a>';
		list += '&nbsp;<a href="' + item.url + '" title="Kliknutím otevřete okno s odkazem" target="_blank">' + item.title + '</a>';
		list += '</li>';
	}
			
	return  list + '</ol>';		  	
};