(function($){
	//default consts of excheck
	var _consts = {
		event: {
			CHECK: "ztree_check"
		},
		id: {
			CHECK: "_check"
		},
		checkbox: {
			STYLE: "checkbox",
			DEFAULT: "chk",
			DISABLED: "disable",
			FALSE: "false",
			TRUE: "true",
			FULL: "full",
			PART: "part",
			FOCUS: "focus"
		},
		radio: {
			STYLE: "radio",
			TYPE_ALL: "all",
			TYPE_LEVEL: "level"
		}
	},
	//default setting of excheck
	_setting = {
		check: {
			enable: false,
			autoCheckTrigger: false,
			chkStyle: _consts.checkbox.STYLE,
			nocheckInherit: false,
			chkDisabledInherit: false,
			radioType: _consts.radio.TYPE_LEVEL,
			chkboxType: {
				"Y": "ps",
				"N": "ps"
			}
		},
		data: {
			key: {
				checked: "checked"
			}
		},
		callback: {
			beforeCheck:null,
			onCheck:null
		}
	},
	//default root of excheck
	_initRoot = function (setting) {
		var r = data.getRoot(setting);
		r.radioCheckedList = [];
	},
	//default cache of excheck
	_initCache = function(treeId) {},
	//default bind event of excheck
	_bindEvent = function(setting) {
		var o = setting.treeObj,
		c = consts.event;
		o.bind(c.CHECK, function (event, srcEvent, treeId, node) {
			event.srcEvent = srcEvent;
			tools.apply(setting.callback.onCheck, [event, treeId, node]);
		});
	},
	_unbindEvent = function(setting) {
		var o = setting.treeObj,
		c = consts.event;
		o.unbind(c.CHECK);
	},
	//default event proxy of excheck
	_eventProxy = function(e) {
		var target = e.target,
		setting = data.getSetting(e.data.treeId),
		tId = "", node = null,
		nodeEventType = "", treeEventType = "",
		nodeEventCallback = null, treeEventCallback = null;

		if (tools.eqs(e.type, "mouseover")) {
			if (setting.check.enable && tools.eqs(target.tagName, "span") && target.getAttribute("treeNode"+ consts.id.CHECK) !== null) {
				tId = tools.getNodeMainDom(target).id;
				nodeEventType = "mouseoverCheck";
			}
		} else if (tools.eqs(e.type, "mouseout")) {
			if (setting.check.enable && tools.eqs(target.tagName, "span") && target.getAttribute("treeNode"+ consts.id.CHECK) !== null) {
				tId = tools.getNodeMainDom(target).id;
				nodeEventType = "mouseoutCheck";
			}
		} else if (tools.eqs(e.type, "click")) {
			if (setting.check.enable && tools.eqs(target.tagName, "span") && target.getAttribute("treeNode"+ consts.id.CHECK) !== null) {
				tId = tools.getNodeMainDom(target).id;
				nodeEventType = "checkNode";
			}
		}
		if (tId.length>0) {
			node = data.getNodeCache(setting, tId);
			switch (nodeEventType) {
				case "checkNode" :
					nodeEventCallback = _handler.onCheckNode;
					break;
				case "mouseoverCheck" :
					nodeEventCallback = _handler.onMouseoverCheck;
					break;
				case "mouseoutCheck" :
					nodeEventCallback = _handler.onMouseoutCheck;
					break;
			}
		}
		var proxyResult = {
			stop: nodeEventType === "checkNode",
			node: node,
			nodeEventType: nodeEventType,
			nodeEventCallback: nodeEventCallback,
			treeEventType: treeEventType,
			treeEventCallback: treeEventCallback
		};
		return proxyResult
	},
	//default init node of excheck
	_initNode = function(setting, level, n, parentNode, isFirstNode, isLastNode, openFlag) {
		if (!n) return;
		var checkedKey = setting.data.key.checked;
		if (typeof n[checkedKey] == "string") n[checkedKey] = tools.eqs(n[checkedKey], "true");
		n[checkedKey] = !!n[checkedKey];
		n.checkedOld = n[checkedKey];
		if (typeof n.nocheck == "string") n.nocheck = tools.eqs(n.nocheck, "true");
		n.nocheck = !!n.nocheck || (setting.check.nocheckInherit && parentNode && !!parentNode.nocheck);
		if (typeof n.chkDisabled == "string") n.chkDisabled = tools.eqs(n.chkDisabled, "true");
		n.chkDisabled = !!n.chkDisabled || (setting.check.chkDisabledInherit && parentNode && !!parentNode.chkDisabled);
		if (typeof n.halfCheck == "string") n.halfCheck = tools.eqs(n.halfCheck, "true");
		n.halfCheck = !!n.halfCheck;
		n.check_Child_State = -1;
		n.check_Focus = false;
		n.getCheckStatus = function() {return data.getCheckStatus(setting, n);};

		if (setting.check.chkStyle == consts.radio.STYLE && setting.check.radioType == consts.radio.TYPE_ALL && n[checkedKey] ) {
			var r = data.getRoot(setting);
			r.radioCheckedList.push(n);
		}
	},
	//add dom for check
	_beforeA = function(setting, node, html) {
		var checkedKey = setting.data.key.checked;
		if (setting.check.enable) {
			data.makeChkFlag(setting, node);
			html.push("<span ID='", node.tId, consts.id.CHECK, "' class='", view.makeChkClass(setting, node), "' treeNode", consts.id.CHECK, (node.nocheck === true?" style='display:none;'":""),"></span>");
		}
	},
	//update zTreeObj, add method of check
	_zTreeTools = function(setting, zTreeTools) {
		zTreeTools.checkNode = function(node, checked, checkTypeFlag, callbackFlag) {
			var checkedKey = this.setting.data.key.checked;
			if (node.chkDisabled === true) return;
			if (checked !== true && checked !== false) {
				checked = !node[checkedKey];
			}
			callbackFlag = !!callbackFlag;

			if (node[checkedKey] === checked && !checkTypeFlag) {
				return;
			} else if (callbackFlag && tools.apply(this.setting.callback.beforeCheck, [this.setting.treeId, node], true) == false) {
				return;
			}
			if (tools.uCanDo(this.setting) && this.setting.check.enable && node.nocheck !== true) {
				node[checkedKey] = checked;
				var checkObj = $$(node, consts.id.CHECK, this.setting);
				if (checkTypeFlag || this.setting.check.chkStyle === consts.radio.STYLE) view.checkNodeRelation(this.setting, node);
				view.setChkClass(this.setting, checkObj, node);
				view.repairParentChkClassWithSelf(this.setting, node);
				if (callbackFlag) {
					this.setting.treeObj.trigger(consts.event.CHECK, [null, this.setting.treeId, node]);
				}
			}
		}

		zTreeTools.checkAllNodes = function(checked) {
			view.repairAllChk(this.setting, !!checked);
		}

		zTreeTools.getCheckedNodes = function(checked) {
			var childKey = this.setting.data.key.children;
			checked = (checked !== false);
			return data.getTreeCheckedNodes(this.setting, data.getRoot(this.setting)[childKey], checked);
		}

		zTreeTools.getChangeCheckedNodes = function() {
			var childKey = this.setting.data.key.children;
			return data.getTreeChangeCheckedNodes(this.setting, data.getRoot(this.setting)[childKey]);
		}

		zTreeTools.setChkDisabled = function(node, disabled, inheritParent, inheritChildren) {
			disabled = !!disabled;
			inheritParent = !!inheritParent;
			inheritChildren = !!inheritChildren;
			view.repairSonChkDisabled(this.setting, node, disabled, inheritChildren);
			view.repairParentChkDisabled(this.setting, node.getParentNode(), disabled, inheritParent);
		}

		var _updateNode = zTreeTools.updateNode;
		zTreeTools.updateNode = function(node, checkTypeFlag) {
			if (_updateNode) _updateNode.apply(zTreeTools, arguments);
			if (!node || !this.setting.check.enable) return;
			var nObj = $$(node, this.setting);
			if (nObj.get(0) && tools.uCanDo(this.setting)) {
				var checkObj = $$(node, consts.id.CHECK, this.setting);
				if (checkTypeFlag == true || this.setting.check.chkStyle === consts.radio.STYLE) view.checkNodeRelation(this.setting, node);
				view.setChkClass(this.setting, checkObj, node);
				view.repairParentChkClassWithSelf(this.setting, node);
			}
		}
	},
	//method of operate data
	_data = {
		getRadioCheckedList: function(setting) {
			var checkedList = data.getRoot(setting).radioCheckedList;
			for (var i=0, j=checkedList.length; i<j; i++) {
				if(!data.getNodeCache(setting, checkedList[i].tId)) {
					checkedList.splice(i, 1);
					i--; j--;
				}
			}
			return checkedList;
		},
		getCheckStatus: function(setting, node) {
			if (!setting.check.enable || node.nocheck || node.chkDisabled) return null;
			var checkedKey = setting.data.key.checked,
			r = {
				checked: node[checkedKey],
				half: node.halfCheck ? node.halfCheck : (setting.check.chkStyle == consts.radio.STYLE ? (node.check_Child_State === 2) : (node[checkedKey] ? (node.check_Child_State > -1 && node.check_Child_State < 2) : (node.check_Child_State > 0)))
			};
			return r;
		},
		getTreeCheckedNodes: function(setting, nodes, checked, results) {
			if (!nodes) return [];
			var childKey = setting.data.key.children,
			checkedKey = setting.data.key.checked,
			onlyOne = (checked && setting.check.chkStyle == consts.radio.STYLE && setting.check.radioType == consts.radio.TYPE_ALL);
			results = !results ? [] : results;
			for (var i = 0, l = nodes.length; i < l; i++) {
				if (nodes[i].nocheck !== true && nodes[i].chkDisabled !== true && nodes[i][checkedKey] == checked) {
					results.push(nodes[i]);
					if(onlyOne) {
						break;
					}
				}
				data.getTreeCheckedNodes(setting, nodes[i][childKey], checked, results);
				if(onlyOne && results.length > 0) {
					break;
				}
			}
			return results;
		},
		getTreeChangeCheckedNodes: function(setting, nodes, results) {
			if (!nodes) return [];
			var childKey = setting.data.key.children,
			checkedKey = setting.data.key.checked;
			results = !results ? [] : results;
			for (var i = 0, l = nodes.length; i < l; i++) {
				if (nodes[i].nocheck !== true && nodes[i].chkDisabled !== true && nodes[i][checkedKey] != nodes[i].checkedOld) {
					results.push(nodes[i]);
				}
				data.getTreeChangeCheckedNodes(setting, nodes[i][childKey], results);
			}
			return results;
		},
		makeChkFlag: function(setting, node) {
			if (!node) return;
			var childKey = setting.data.key.children,
			checkedKey = setting.data.key.checked,
			chkFlag = -1;
			if (node[childKey]) {
				for (var i = 0, l = node[childKey].length; i < l; i++) {
					var cNode = node[childKey][i];
					var tmp = -1;
					if (setting.check.chkStyle == consts.radio.STYLE) {
						if (cNode.nocheck === true || cNode.chkDisabled === true) {
							tmp = cNode.check_Child_State;
						} else if (cNode.halfCheck === true) {
							tmp = 2;
						} else if (cNode[checkedKey]) {
							tmp = 2;
						} else {
							tmp = cNode.check_Child_State > 0 ? 2:0;
						}
						if (tmp == 2) {
							chkFlag = 2; break;
						} else if (tmp == 0){
							chkFlag = 0;
						}
					} else if (setting.check.chkStyle == consts.checkbox.STYLE) {
						if (cNode.nocheck === true || cNode.chkDisabled === true) {
							tmp = cNode.check_Child_State;
						} else if (cNode.halfCheck === true) {
							tmp = 1;
						} else if (cNode[checkedKey] ) {
							tmp = (cNode.check_Child_State === -1 || cNode.check_Child_State === 2) ? 2 : 1;
						} else {
							tmp = (cNode.check_Child_State > 0) ? 1 : 0;
						}
						if (tmp === 1) {
							chkFlag = 1; break;
						} else if (tmp === 2 && chkFlag > -1 && i > 0 && tmp !== chkFlag) {
							chkFlag = 1; break;
						} else if (chkFlag === 2 && tmp > -1 && tmp < 2) {
							chkFlag = 1; break;
						} else if (tmp > -1) {
							chkFlag = tmp;
						}
					}
				}
			}
			node.check_Child_State = chkFlag;
		}
	},
	//method of event proxy
	_event = {

	},
	//method of event handler
	_handler = {
		onCheckNode: function (event, node) {
			if (node.chkDisabled === true) return false;
			var setting = data.getSetting(event.data.treeId),
			checkedKey = setting.data.key.checked;
			if (tools.apply(setting.callback.beforeCheck, [setting.treeId, node], true) == false) return true;
			node[checkedKey] = !node[checkedKey];
			view.checkNodeRelation(setting, node);
			var checkObj = $$(node, consts.id.CHECK, setting);
			view.setChkClass(setting, checkObj, node);
			view.repairParentChkClassWithSelf(setting, node);
			setting.treeObj.trigger(consts.event.CHECK, [event, setting.treeId, node]);
			return true;
		},
		onMouseoverCheck: function(event, node) {
			if (node.chkDisabled === true) return false;
			var setting = data.getSetting(event.data.treeId),
			checkObj = $$(node, consts.id.CHECK, setting);
			node.check_Focus = true;
			view.setChkClass(setting, checkObj, node);
			return true;
		},
		onMouseoutCheck: function(event, node) {
			if (node.chkDisabled === true) return false;
			var setting = data.getSetting(event.data.treeId),
			checkObj = $$(node, consts.id.CHECK, setting);
			node.check_Focus = false;
			view.setChkClass(setting, checkObj, node);
			return true;
		}
	},
	//method of tools for zTree
	_tools = {

	},
	//method of operate ztree dom
	_view = {
		checkNodeRelation: function(setting, node) {
			var pNode, i, l,
			childKey = setting.data.key.children,
			checkedKey = setting.data.key.checked,
			r = consts.radio;
			if (setting.check.chkStyle == r.STYLE) {
				var checkedList = data.getRadioCheckedList(setting);
				if (node[checkedKey]) {
					if (setting.check.radioType == r.TYPE_ALL) {
						for (i = checkedList.length-1; i >= 0; i--) {
							pNode = checkedList[i];
							if (pNode[checkedKey] && pNode != node) {
								pNode[checkedKey] = false;
								checkedList.splice(i, 1);

								view.setChkClass(setting, $$(pNode, consts.id.CHECK, setting), pNode);
								if (pNode.parentTId != node.parentTId) {
									view.repairParentChkClassWithSelf(setting, pNode);
								}
							}
						}
						checkedList.push(node);
					} else {
						var parentNode = (node.parentTId) ? node.getParentNode() : data.getRoot(setting);
						for (i = 0, l = parentNode[childKey].length; i < l; i++) {
							pNode = parentNode[childKey][i];
							if (pNode[checkedKey] && pNode != node) {
								pNode[checkedKey] = false;
								view.setChkClass(setting, $$(pNode, consts.id.CHECK, setting), pNode);
							}
						}
					}
				} else if (setting.check.radioType == r.TYPE_ALL) {
					for (i = 0, l = checkedList.length; i < l; i++) {
						if (node == checkedList[i]) {
							checkedList.splice(i, 1);
							break;
						}
					}
				}

			} else {
				if (node[checkedKey] && (!node[childKey] || node[childKey].length==0 || setting.check.chkboxType.Y.indexOf("s") > -1)) {
					view.setSonNodeCheckBox(setting, node, true);
				}
				if (!node[checkedKey] && (!node[childKey] || node[childKey].length==0 || setting.check.chkboxType.N.indexOf("s") > -1)) {
					view.setSonNodeCheckBox(setting, node, false);
				}
				if (node[checkedKey] && setting.check.chkboxType.Y.indexOf("p") > -1) {
					view.setParentNodeCheckBox(setting, node, true);
				}
				if (!node[checkedKey] && setting.check.chkboxType.N.indexOf("p") > -1) {
					view.setParentNodeCheckBox(setting, node, false);
				}
			}
		},
		makeChkClass: function(setting, node) {
			var checkedKey = setting.data.key.checked,
			c = consts.checkbox, r = consts.radio,
			fullStyle = "";
			if (node.chkDisabled === true) {
				fullStyle = c.DISABLED;
			} else if (node.halfCheck) {
				fullStyle = c.PART;
			} else if (setting.check.chkStyle == r.STYLE) {
				fullStyle = (node.check_Child_State < 1)? c.FULL:c.PART;
			} else {
				fullStyle = node[checkedKey] ? ((node.check_Child_State === 2 || node.check_Child_State === -1) ? c.FULL:c.PART) : ((node.check_Child_State < 1)? c.FULL:c.PART);
			}
			var chkName = setting.check.chkStyle + "_" + (node[checkedKey] ? c.TRUE : c.FALSE) + "_" + fullStyle;
			chkName = (node.check_Focus && node.chkDisabled !== true) ? chkName + "_" + c.FOCUS : chkName;
			return consts.className.BUTTON + " " + c.DEFAULT + " " + chkName;
		},
		repairAllChk: function(setting, checked) {
			if (setting.check.enable && setting.check.chkStyle === consts.checkbox.STYLE) {
				var checkedKey = setting.data.key.checked,
				childKey = setting.data.key.children,
				root = data.getRoot(setting);
				for (var i = 0, l = root[childKey].length; i<l ; i++) {
					var node = root[childKey][i];
					if (node.nocheck !== true && node.chkDisabled !== true) {
						node[checkedKey] = checked;
					}
					view.setSonNodeCheckBox(setting, node, checked);
				}
			}
		},
		repairChkClass: function(setting, node) {
			if (!node) return;
			data.makeChkFlag(setting, node);
			if (node.nocheck !== true) {
				var checkObj = $$(node, consts.id.CHECK, setting);
				view.setChkClass(setting, checkObj, node);
			}
		},
		repairParentChkClass: function(setting, node) {
			if (!node || !node.parentTId) return;
			var pNode = node.getParentNode();
			view.repairChkClass(setting, pNode);
			view.repairParentChkClass(setting, pNode);
		},
		repairParentChkClassWithSelf: function(setting, node) {
			if (!node) return;
			var childKey = setting.data.key.children;
			if (node[childKey] && node[childKey].length > 0) {
				view.repairParentChkClass(setting, node[childKey][0]);
			} else {
				view.repairParentChkClass(setting, node);
			}
		},
		repairSonChkDisabled: function(setting, node, chkDisabled, inherit) {
			if (!node) return;
			var childKey = setting.data.key.children;
			if (node.chkDisabled != chkDisabled) {
				node.chkDisabled = chkDisabled;
			}
			view.repairChkClass(setting, node);
			if (node[childKey] && inherit) {
				for (var i = 0, l = node[childKey].length; i < l; i++) {
					var sNode = node[childKey][i];
					view.repairSonChkDisabled(setting, sNode, chkDisabled, inherit);
				}
			}
		},
		repairParentChkDisabled: function(setting, node, chkDisabled, inherit) {
			if (!node) return;
			if (node.chkDisabled != chkDisabled && inherit) {
				node.chkDisabled = chkDisabled;
			}
			view.repairChkClass(setting, node);
			view.repairParentChkDisabled(setting, node.getParentNode(), chkDisabled, inherit);
		},
		setChkClass: function(setting, obj, node) {
			if (!obj) return;
			if (node.nocheck === true) {
				obj.hide();
			} else {
				obj.show();
			}
            obj.attr('class', view.makeChkClass(setting, node));
		},
		setParentNodeCheckBox: function(setting, node, value, srcNode) {
			var childKey = setting.data.key.children,
			checkedKey = setting.data.key.checked,
			checkObj = $$(node, consts.id.CHECK, setting);
			if (!srcNode) srcNode = node;
			data.makeChkFlag(setting, node);
			if (node.nocheck !== true && node.chkDisabled !== true) {
				node[checkedKey] = value;
				view.setChkClass(setting, checkObj, node);
				if (setting.check.autoCheckTrigger && node != srcNode) {
					setting.treeObj.trigger(consts.event.CHECK, [null, setting.treeId, node]);
				}
			}
			if (node.parentTId) {
				var pSign = true;
				if (!value) {
					var pNodes = node.getParentNode()[childKey];
					for (var i = 0, l = pNodes.length; i < l; i++) {
						if ((pNodes[i].nocheck !== true && pNodes[i].chkDisabled !== true && pNodes[i][checkedKey])
						|| ((pNodes[i].nocheck === true || pNodes[i].chkDisabled === true) && pNodes[i].check_Child_State > 0)) {
							pSign = false;
							break;
						}
					}
				}
				if (pSign) {
					view.setParentNodeCheckBox(setting, node.getParentNode(), value, srcNode);
				}
			}
		},
		setSonNodeCheckBox: function(setting, node, value, srcNode) {
			if (!node) return;
			var childKey = setting.data.key.children,
			checkedKey = setting.data.key.checked,
			checkObj = $$(node, consts.id.CHECK, setting);
			if (!srcNode) srcNode = node;

			var hasDisable = false;
			if (node[childKey]) {
				for (var i = 0, l = node[childKey].length; i < l; i++) {
					var sNode = node[childKey][i];
					view.setSonNodeCheckBox(setting, sNode, value, srcNode);
					if (sNode.chkDisabled === true) hasDisable = true;
				}
			}

			if (node != data.getRoot(setting) && node.chkDisabled !== true) {
				if (hasDisable && node.nocheck !== true) {
					data.makeChkFlag(setting, node);
				}
				if (node.nocheck !== true && node.chkDisabled !== true) {
					node[checkedKey] = value;
					if (!hasDisable) node.check_Child_State = (node[childKey] && node[childKey].length > 0) ? (value ? 2 : 0) : -1;
				} else {
					node.check_Child_State = -1;
				}
				view.setChkClass(setting, checkObj, node);
				if (setting.check.autoCheckTrigger && node != srcNode && node.nocheck !== true && node.chkDisabled !== true) {
					setting.treeObj.trigger(consts.event.CHECK, [null, setting.treeId, node]);
				}
			}

		}
	},

	_z = {
		tools: _tools,
		view: _view,
		event: _event,
		data: _data
	};
	$.extend(true, $.fn.zTree.consts, _consts);
	$.extend(true, $.fn.zTree._z, _z);

	var zt = $.fn.zTree,
	tools = zt._z.tools,
	consts = zt.consts,
	view = zt._z.view,
	data = zt._z.data,
	event = zt._z.event,
	$$ = tools.$;

	data.exSetting(_setting);
	data.addInitBind(_bindEvent);
	data.addInitUnBind(_unbindEvent);
	data.addInitCache(_initCache);
	data.addInitNode(_initNode);
	data.addInitProxy(_eventProxy, true);
	data.addInitRoot(_initRoot);
	data.addBeforeA(_beforeA);
	data.addZTreeTools(_zTreeTools);

	var _createNodes = view.createNodes;
	view.createNodes = function(setting, level, nodes, parentNode, index) {
		if (_createNodes) _createNodes.apply(view, arguments);
		if (!nodes) return;
		view.repairParentChkClassWithSelf(setting, parentNode);
	}
	var _removeNode = view.removeNode;
	view.removeNode = function(setting, node) {
		var parentNode = node.getParentNode();
		if (_removeNode) _removeNode.apply(view, arguments);
		if (!node || !parentNode) return;
		view.repairChkClass(setting, parentNode);
		view.repairParentChkClass(setting, parentNode);
	}

	var _appendNodes = view.appendNodes;
	view.appendNodes = function(setting, level, nodes, parentNode, index, initFlag, openFlag) {
		var html = "";
		if (_appendNodes) {
			html = _appendNodes.apply(view, arguments);
		}
		if (parentNode) {
			data.makeChkFlag(setting, parentNode);
		}
		return html;
	}
})(jQuery);