var tree;
var ontologies = {};
var jsonTreeData = [];

function destroyOntologyTree() {
	if (jsonTreeData.lenght == 1) {
		if (jsonTreeData[0].children) {
			jsonTreeData[0].children = [];
		}
	}
	if (tree) {
		tree.destroy();
	}
}

function onTreeNodeClick(NODE, TREE_OBJ) {
	if (NODE.childNodes.length == 1) {
		var ontologyURI = NODE.id.substring(16);
		var children = [];
		if (ontologies[ontologyURI]) {
			for ( var i = 0; i < ontologies[ontologyURI].length; i++) {
				var ontologyName = ontologies[ontologyURI][i];
				TREE_OBJ.create({
					attributes : {
						'id' : randomString() + ontologyName
					},
					data : ontologyName,
					state : "closed",
					children : []
				}, NODE);
			}
		}
	}
}

function initOntologyTree() {
	jQuery("div#RDFExtractorOntologyTree").empty();
	tree = jQuery.tree_create();

	tree.init(jQuery("#RDFExtractorOntologyTree"), {
		data : {
			type : "json",
			json : jsonTreeData
		},
		ui : {
			theme_name : "classic",
			context : [ {
				id : "open",
				label : "Open ontology",
				icon : "open.png",
				visible : function(NODE, TREE_OBJ) {
				},
				action : function(NODE, TREE_OBJ) {
					// here node is jquery element
					var id = NODE.attr("id");
					var ontologyURI = id.substring(16);
					window.open(ontologyURI, ontologyURI,
							'width=800,height=600');
				}
			} ]
		},
		callback : {
			onselect : function(NODE, TREE_OBJ) {
				//alert("select");
			},
			onopen : function(NODE, TREE_OBJ) {
				onTreeNodeClick(NODE, TREE_OBJ);
			},

			ondblclk : function(NODE, TREE_OBJ) {
				// here NODE is javascript node element
				var id = NODE.id;
				var ontologyURI = id.substring(16);
				window.open(ontologyURI, ontologyURI, 'width=800,height=600');

				//TREE_OBJ.toggle_branch.call(TREE_OBJ, NODE); 
				//TREE_OBJ.select_branch.call(TREE_OBJ, NODE); 
				//onTreeNodeClick(NODE, TREE_OBJ);
			}
		},
		rules : {
			renameable : "none",
			deletable : "none",
			creatable : "all"
		}
	});

}

function getOntologiesList(url, onto) {
	var ontologiesList = [];
	for ( var i = 0; i < onto.bindings.length; i++) {
		var triple = onto.bindings[i];
		var s = triple.s;
		var p = triple.p;
		var o = triple.o;

		var sv = "" + triple.s.value;
		var pv = "" + triple.p.value;
		var ov = "" + triple.o.value;

		if (sv != url && jQuery.inArray(sv, ontologiesList) == -1) {
			ontologiesList.push(sv);
		}
		if (ov != url && jQuery.inArray(ov, ontologiesList) == -1) {
			ontologiesList.push(ov);
		}
	}
	return ontologiesList;
}

function buildJsonTreeData(url, onto) {

	for ( var i = 0; i < onto.bindings.length; i++) {
		var triple = onto.bindings[i];

		var s = triple.s;
		var p = triple.p;
		var o = triple.o;

		var sv = triple.s.value;
		var pv = triple.p.value;
		var ov = triple.o.value;
		if (!ontologies["" + sv]) {
			ontologies["" + sv] = [];
		}

		ontologies["" + sv].push(ov);
	}

	jsonTreeData.push({
		attributes : {
			id : randomString() + url
		},
		state : "open",
		data : url,
		children : []
	});

	if (ontologies[url]) {
		for ( var i = 0; i < ontologies[url].length; i++) {
			var ontologyName = ontologies[url][i];
			jsonTreeData[0].children.push({
				attributes : {
					'id' : randomString() + ontologyName
				},
				data : ontologyName,
				state : "closed",
				children : []
			});
		}
	}
	return jsonTreeData;
}
function printOntologyList(o) {
	jQuery("div#RDFExtractorOntologyList").append(
			"<textarea class=\"ontologiesList\">" + o.join("\n")
					+ "</textarea>");
}

function printOntologyLink(parameters) {
	var id = randomString();
	var html = '<div style="margin-top:20px;">'
			+ '<span>Full ontology tree is available if you </span>'
			+ '<button id="' + id + '"> ' + 'Inspect again' + '</button>'
			+ '<span> using reasoning.</span>' + '<br /><br />' + '</div>';

	jQuery("div.ontologiesInspectAgain").show();
	jQuery("div.ontologiesBox").hide();

	jQuery("div.ontologiesInspectAgain").empty().append(html);
	jQuery("#" + id).button({
		icons : {
			primary : 'ui-icon-refresh'
		}
	}).click(function() {
		jQuery("div.ontologiesInspectAgain").hide();
		jQuery("div.ontologiesBox").show();
		// here we can not reload the page (for contennt , an empty url it would not work !!!)
		// we have to set doReasoning=1
		//invoke the runRDFExtractor(parameters) 
		parameters.doReasoning = "1";
		runRDFExtractor(parameters);
	});
}