var JAMWiki = JAMWiki || {};
if (!Function.bind) {
	// allow binding of a function to a specific scope.  Usage: myFunction.bind(this, args).
	Function.prototype.bind = function(scope) {
		var _function = this;
		// trim the argument array (if any) to remove the scope argument
		var args = new Array();
		for (var i = 1; i < arguments.length; i++) {
			args[i - 1] = arguments[i];
		}
		return function() {
			return _function.apply(scope, args);
		}
	}
}
JAMWiki.Editor = function() {
	var alertText;
	var clientPC = navigator.userAgent.toLowerCase(); // Get client info
	var is_gecko = ((clientPC.indexOf('gecko')!=-1) && (clientPC.indexOf('spoofer')==-1)
					&& (clientPC.indexOf('khtml') == -1) && (clientPC.indexOf('netscape/7.0')==-1));
	var is_safari = ((clientPC.indexOf('AppleWebKit')!=-1) && (clientPC.indexOf('spoofer')==-1));
	function escapeQuotes(text) {
		var re=new RegExp("'","g");
		text=text.replace(re,"\\'");
		re=new RegExp('"',"g");
		text=text.replace(re,'&quot;');
		re=new RegExp("\\n","g");
		text=text.replace(re,"\\n");
		return text;
	}
	return {
		noOverwrite: false,
		addButton: function(imageFile, speedTip, tagOpen, tagClose, sampleText) {
			speedTip=escapeQuotes(speedTip);
			tagOpen=escapeQuotes(tagOpen);
			tagClose=escapeQuotes(tagClose);
			sampleText=escapeQuotes(sampleText);
			var mouseOver="";
			// we can't change the selection, so we show example texts
			// when moving the mouse instead, until the first button is clicked
			if(!document.selection && !is_gecko) {
				// filter backslashes so it can be shown in the infobox
				var re=new RegExp("\\\\n","g");
				tagOpen=tagOpen.replace(re,"");
				tagClose=tagClose.replace(re,"");
				mouseOver = "onMouseover=\"if(!JAMWiki.Editor.noOverwrite){document.infoform.infobox.value='"+tagOpen+sampleText+tagClose+"'};\"";
			}
			document.write("<a href=\"javascript:JAMWiki.Editor.insertTags");
			document.write("('"+tagOpen+"','"+tagClose+"','"+sampleText+"');\">");
			document.write("<img width=\"23\" height=\"22\" src=\""+imageFile+"\" border=\"0\" alt=\""+speedTip+"\" title=\""+speedTip+"\""+mouseOver+">");
			document.write("</a>");
		},
		// apply tagOpen/tagClose to selection in textarea,
		// use sampleText instead of selection if there is none
		// copied and adapted from phpBB
		insertTags: function(tagOpen, tagClose, sampleText) {
			var txtarea = document.editForm.contents;
			// IE
			if(document.selection  && !is_gecko) {
				var theSelection = document.selection.createRange().text;
				if(!theSelection) { theSelection=sampleText;}
				txtarea.focus();
				if(theSelection.charAt(theSelection.length - 1) == " "){// exclude ending space char, if any
					theSelection = theSelection.substring(0, theSelection.length - 1);
					document.selection.createRange().text = tagOpen + theSelection + tagClose + " ";
				} else {
					document.selection.createRange().text = tagOpen + theSelection + tagClose;
				}
			// Mozilla
			} else if(txtarea.selectionStart || txtarea.selectionStart == '0') {
				var startPos = txtarea.selectionStart;
				var endPos = txtarea.selectionEnd;
				var scrollTop=txtarea.scrollTop;
				var myText = (txtarea.value).substring(startPos, endPos);
				if(!myText) { myText=sampleText;}
				if(myText.charAt(myText.length - 1) == " "){ // exclude ending space char, if any
					subst = tagOpen + myText.substring(0, (myText.length - 1)) + tagClose + " ";
				} else {
					subst = tagOpen + myText + tagClose;
				}
				txtarea.value = txtarea.value.substring(0, startPos) + subst +
				  txtarea.value.substring(endPos, txtarea.value.length);
				txtarea.focus();
				var cPos=startPos+(tagOpen.length+myText.length+tagClose.length);
				txtarea.selectionStart=cPos;
				txtarea.selectionEnd=cPos;
				txtarea.scrollTop=scrollTop;
			// All others
			} else {
				var copy_alertText=alertText;
				var re1=new RegExp("\\$1","g");
				var re2=new RegExp("\\$2","g");
				copy_alertText=copy_alertText.replace(re1,sampleText);
				copy_alertText=copy_alertText.replace(re2,tagOpen+sampleText+tagClose);
				var text;
				if (sampleText) {
					text=prompt(copy_alertText);
				} else {
					text="";
				}
				if(!text) { text=sampleText;}
				text=tagOpen+text+tagClose;
				document.infoform.infobox.value=text;
				// in Safari this causes scrolling
				if(!is_safari) {
					txtarea.focus();
				}
				this.noOverwrite=true;
			}
			// reposition cursor if possible
			if (txtarea.createTextRange) txtarea.caretPos = document.selection.createRange().duplicate();
		}
	};
}();
JAMWiki.UI = function() {
	return {
		// enable/disable radio buttons before or after the current element
		historyRadio: function(element, siblingName, disableLower) {
			// since revision numbers are chronological this code compares revision 
			// numbers to determine whether to display or hide a radio button
			var revisionId = parseInt(element.value);
			var siblings = document.getElementsByName(siblingName);
			for (var i = 0; i < siblings.length; i++) {
				// make sure the element is a radio button, if not skip it
				if (siblings[i].type != 'radio') {
					continue;
				}
				// now make the button visible or hidden as appropriate
				if (disableLower && parseInt(siblings[i].value) <= revisionId) {
					siblings[i].style.visibility = 'hidden';
				} else if (!disableLower && parseInt(siblings[i].value) >= revisionId) {
					siblings[i].style.visibility = 'hidden';
				} else {
					siblings[i].style.visibility = 'visible';
				}
			}
		}
	};
}();
JAMWiki.Tabs = function() {
	// Based on code by Matt Doyle http://www.elated.com/articles/javascript-tabs/.
	var tabLinks = new Array();
	var contentDivs = new Array();
	function showTab() {
		var tabLink = getFirstChildWithTagName(this, 'A');
		var selectedId = getHash(tabLink.getAttribute('href'));
		for (var id in contentDivs) {
			if (id == selectedId) {
				tabLinks[id].className = 'active';
				contentDivs[id].className = 'submenu-tab-item';
			} else {
				tabLinks[id].className = '';
				contentDivs[id].className = 'submenu-tab-item hidden';
			}
		}
		return false;
	}
	function getFirstChildWithTagName(element, tagName) {
		for (var i = 0; i < element.childNodes.length; i++) {
			if (element.childNodes[i].nodeName == tagName) {
				return element.childNodes[i];
			}
		}
	}
	function getHash(url) {
		var hashPos = url.lastIndexOf('#');
		return url.substring(hashPos + 1);
	}
	return {
		initializeTabs: function() {
			var tabNode = document.getElementById('tab_submenu');
			if (!tabNode) {
				return;
			}
			var tabListItems = tabNode.childNodes;
			for (var i = 0; i < tabListItems.length; i++) {
				if (tabListItems[i].nodeName == "LI") {
					var tabLink = getFirstChildWithTagName(tabListItems[i], 'A');
					var id = getHash(tabLink.getAttribute('href'));
					tabLinks[id] = tabListItems[i];
					contentDivs[id] = document.getElementById(id);
				}
			}
			var i = 0;
			var selectedId = 0;
			for (var id in tabLinks) {
				tabLinks[id].onclick = showTab;
				var tabLink = getFirstChildWithTagName(tabLinks[id], 'A');
				tabLink.onfocus = function() {
					// blur focus to avoid a link box around the text
					this.blur();
				};
				if (document.location.hash == '#' + id || i == 0) {
					selectedId = id;
				}
				i++;
			}
			tabLinks[selectedId].className = 'active';
			var i = 0;
			for (var id in contentDivs) {
				if (id != selectedId) {
					contentDivs[id].className = 'submenu-tab-item hidden';
				}
				i++;
			}
		}
	};
}();
JAMWiki.Admin = function() {
	// array of checkbox ID and corresponding text input ID
	var virtualWikiCheckboxArray = [
			['defaultRootTopicName', 'rootTopicName'],
			['defaultVirtualWikiSiteName', 'virtualWikiSiteName'],
			['defaultVirtualWikiLogoImageUrl', 'virtualWikiLogoImageUrl'],
			['defaultVirtualWikiMetaDescription', 'virtualWikiMetaDescription']
	];
	function toggleInputState(checkbox, input) {
		input.disabled = checkbox.checked;
		if (checkbox.checked) {
			input.value = checkbox.value;
		}
	}
	return {
		initializeVirtualWikiCheckboxes: function() {
			for (var i = 0; i < virtualWikiCheckboxArray.length; i++) {
				var checkbox = document.getElementById(virtualWikiCheckboxArray[i][0]);
				if (!checkbox) {
					// not available on this page
					break;
				}
				var input = document.getElementById(virtualWikiCheckboxArray[i][1]);
				checkbox.onclick = toggleInputState.bind(JAMWiki.Admin, checkbox, input);
				toggleInputState(checkbox, input);
			}
		}
	};
}();
window.onload = function() {
	JAMWiki.Tabs.initializeTabs();
	JAMWiki.Admin.initializeVirtualWikiCheckboxes();
}