function getRequest() {
	var req;
	if(window.XMLHttpRequest) {
		req = new XMLHttpRequest();
	} else {
		req = new ActiveXObject("Microsoft.XMLHTTP");
	}
	return req;
}

function initMenu() {
	this.menu = document.getElementById("mainmenu");
	this.submenus = this.menu.getElementsByTagName("div");
	this.oneSmOnly = 3;

	this.collapseMenu = function(submenu) {
		var minHeight = submenu.getElementsByTagName("span")[0].offsetHeight;
		var moveBy = Math.round(4 * submenu.getElementsByTagName("a").length);
		var mainInstance = this;
		var intId = setInterval(function() {
			var curHeight = submenu.offsetHeight;
			var newHeight = curHeight - moveBy;
			if(newHeight > minHeight) {
				submenu.style.height = newHeight + "px";
			} else {
				clearInterval(intId);
				submenu.style.height = "";
				submenu.className = "collapsed";
				mainInstance.memorize();
			}
		}, 30);
	};

	this.collapseOthers = function(submenu) {
		if(!multimenu) {
			for(var i = 0; i < this.submenus.length; i++) {
				if(this.submenus[i] != submenu && this.submenus[i].className != "collapsed") {
					this.collapseMenu(this.submenus[i]);
				}
			}
		}
	};

	this.expandMenu = function(submenu) {
		var fullHeight = submenu.getElementsByTagName("span")[0].offsetHeight;
		var links = submenu.getElementsByTagName("a");
		for(var i = 0; i < links.length; i++) {
			fullHeight += links[i].offsetHeight;
		}
		var moveBy = Math.round(4 * links.length);
		var mainInstance = this;
		var intId = setInterval(function() {
			var curHeight = submenu.offsetHeight;
			var newHeight = curHeight + moveBy;
			if(newHeight < fullHeight) {
				submenu.style.height = newHeight + "px";
			} else {
				clearInterval(intId);
				submenu.style.height= "";
				submenu.className = "navbox";
				mainInstance.memorize();
			}
		}, 30);
		this.collapseOthers(submenu);
	};

	this.init = function() {
		var mainInstance = this;
		for(var i = 0; i < this.submenus.length; i++) {
			this.submenus[i].getElementsByTagName("span")[0].onclick = function() {
				if(this.parentNode.className == "collapsed") {
					mainInstance.expandMenu(this.parentNode);
				} else {
					mainInstance.collapseMenu(this.parentNode);
				}
			};
		}
		var links = this.menu.getElementsByTagName("a");
		links[0].className = "active";
		for(var i = 0; i < links.length; i++) {
			if(links[i].href == document.location.href) {
				links[0].className = "";
				links[i].className = "active";
				break;
			}
		}
		var regex = new RegExp("kagera_" + encodeURIComponent("mainmenu") + "=([01]+)");
		var match = regex.exec(document.cookie);
		if(match) {
			var states = match[1].split("");
			for(var i = 0; i < states.length; i++) {
				this.submenus[i].className = (states[i] == 0 ? "collapsed" : "navbox");
			}
		} else if(!multimenu) {
			this.collapseOthers(this.submenus[0]);
		}
	};

	this.memorize = function() {
		var states = new Array();
		for(var i = 0; i < this.submenus.length; i++) {
			states.push(this.submenus[i].className == "collapsed" ? 0 : 1);
			var d = new Date();
			d.setTime(d.getTime() + (30 * 24 * 60 * 60 * 1000));
			document.cookie = "kagera_" + encodeURIComponent("mainmenu") + "=" + states.join("") + "; expires=" + d.toGMTString() + "; path=/";
		}
	};
}

function initTips() {
	var help = document.getElementById("help")
	if(help) {
		var abbrs = document.getElementsByTagName("abbr");
		var tips = help.getElementsByTagName("div");
		var mouseX, mouseY;
		document.onmousemove = function(e) {
			mouseX = (window.Event) ? e.pageX : event.clientX + (document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft);
			mouseY = (window.Event) ? e.pageY : event.clientY + (document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop);
		};
		for(var i = 0; i < abbrs.length; i++) {
			abbrs[i].onclick = function() {
				for(var a = 0; a < tips.length; a++) {
					if("s" + tips[a].id == this.id) {
						tips[a].style.left = mouseX + "px";
						tips[a].style.top = (mouseY - (tips[a].offsetHeight + 3)) + "px";
						tips[a].style.visibility = "visible";
						break;
					}
				}
			};
			abbrs[i].onmouseout = function() {
				for(var a = 0; a < tips.length; a++) {
					if("s" + tips[a].id == this.id) {
						tips[a].style.visibility = "hidden";
						break;
					}
				}
			};
		}
	}
}

function logout() {
	window.location.href="index.sh?option=logout";
}

function reboot(ask) {
	var boot = true;
	if(ask) {
		var answer = confirm(sysmsg[6]);
		if(!answer) {
			boot = false;
		}
	}
	if(boot) {
		toggleMsg(sysmsg[5]);
		statefunc = function() {
			window.location.href="index.sh?option=overview";
		}
		testcon = function() {
			runRequest("GET", document.location.href, "&refresh=1", statefunc, false);
		}
		runCommand("reboot", statefunc, true);
		setInterval("testcon()", 5000);
	}
}

function refreshData(func) {
	statefunc = function(req) {
		document.getElementById("content").innerHTML = req.responseText;
		var target = document.getElementById("content");
		var scripts = target.getElementsByTagName("script");
		for (var i = 0; i < scripts.length; i++) {
			eval(scripts[i].innerHTML);
		}
		if(typeof func == "function") {
			func();
		}
	}
	runRequest("GET", document.location.href, "&refresh=1", statefunc, false);
}

function runCommand(params, statefunc, noreload) {
	runRequest("POST", document.location.href + "&refresh=1&runcommand=1", "commands=" + params, statefunc, noreload);
}

function runRequest(method, url, params, statefunc, noreload) {
	var req = getRequest();
	if(req) {
		req.onreadystatechange = function() {
			if(req.readyState == 4 && req.status == 200) {
				if(req.responseText != "") {
					statefunc(req);
				} else if(!noreload) {
					location.reload(true);
				}
			}
		}
		if(method == "POST") {
			req.open("POST", url, true);
			req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
			req.send(params);
		} else {
			req.open("GET", url + params, true);
			req.send();
		}
	}
	return req;
}

function switchView(outid, swval) {
	sw = document.getElementById(outid);
	for(var i = 0; i < sw.children.length; i++) {
		if(sw.children[i].id == swval) {
			sw.children[i].style.display = "block";
		} else {
			sw.children[i].style.display = "none";
		}
	}
}

function toggleMsg(msg) {
	dimbox = document.getElementById("dim");
	msgbox = document.getElementById("msg");
	if(msg) {
		document.body.style.overflow = "hidden";
		msgbox.innerHTML = msgtxt + "&nbsp;&nbsp;" + msg;
		dimbox.style.display = "inline";
		msgbox.style.display = "inline";
	} else {
		msgbox.style.display = "none";
		dimbox.style.display = "none";
		document.body.style.overflow = "auto";
	}
}

window.onload = function() {
	msgtxt = document.getElementById("msg").innerHTML;
	mainmenu = new initMenu();
	mainmenu.init();
	initTips();
	if(typeof initModule == "function") {
		initModule();
	}
}