Components.utils.import("chrome://redirector/content/code/redirector.js");
const Cc = Components.classes;
const Ci = Components.interfaces;
const nsLocalFile = Components.Constructor("@mozilla.org/file/local;1", "nsILocalFile", "initWithPath");

var Settings = {

	lstRedirects: null,
	btnDelete	: null,
	btnEdit 	: null,
	btnUp		: null,
	btnDown 	: null,
	btnExport	: null,
	btnImport	: null,
	chkEnableRedirector : null,
	chkShowStatusBarIcon : null,
	chkShowContextMenu : null,
	chkEnableDebugOutput : null,
	prefs : null,
	
	onLoad : function() {
		try {
			//Get references to controls
			this.lstRedirects = document.getElementById('lstRedirects');
			this.btnDelete = document.getElementById('btnDelete');
			this.btnEdit = document.getElementById('btnEdit');
			this.btnUp = document.getElementById('btnUp');
			this.btnDown = document.getElementById('btnDown');
			this.btnExport = document.getElementById('btnExport');
			this.btnImport = document.getElementById('btnImport');
			this.chkEnableRedirector = document.getElementById('chkEnableRedirector');
			this.chkShowStatusBarIcon = document.getElementById('chkShowStatusBarIcon');
			this.chkShowContextMenu = document.getElementById('chkShowContextMenu');
			this.chkEnableDebugOutput = document.getElementById('chkEnableDebugOutput');
			
			this.prefs = new RedirectorPrefs();
			//Preferences
			this.changedPrefs(this.prefs);
			this.prefs.addListener(this);

			//Redirect list
			this.lstRedirects.selType = 'single'; 
			this.template = document.getElementsByTagName('richlistitem')[0];
			this.lstRedirects.removeChild(this.template);
			var list = [];
			for (var i = 0; i < Redirector.redirectCount; i++) {
				list.push(Redirector.getRedirectAt(i));
			}
			this.addItemsToListBox(list);
			this.selectionChange();
			
			this.strings = document.getElementById('redirector-strings');
			this.strings.getPluralized = function(id, number) {
				id += number == 1 ? 'Singular' : '';
				return this.getFormattedString(id, [number]);	
			};
		} catch(e) {
			alert(e);
		}
	},
	
	onUnload : function() {
		this.prefs.dispose();
	},

	changedPrefs : function(prefs) {
		this.chkEnableRedirector.setAttribute('checked', prefs.enabled);
		this.chkShowStatusBarIcon.setAttribute('checked', prefs.showStatusBarIcon);
		this.chkShowContextMenu.setAttribute('checked', prefs.showContextMenu);
		this.chkEnableDebugOutput.setAttribute('checked', prefs.debugEnabled);
	},
	
	addItemsToListBox : function(items) {

		var item, row, value, newItem;
		
		for each (item in items) {
			newItem = this.template.cloneNode(true);

			newItem.getElementsByAttribute('name', 'dscrIncludePattern')[0].setAttribute('value', item.includePattern);
			newItem.getElementsByAttribute('name', 'dscrExcludePattern')[0].setAttribute('value', item.excludePattern);
			newItem.getElementsByAttribute('name', 'dscrRedirectTo')[0].setAttribute('value', item.redirectUrl);
			var checkEnabled = newItem.getElementsByAttribute('name', 'chkEnabled')[0];
			checkEnabled.setAttribute('checked', !item.disabled);
			newItem.setAttribute('class', item.disabled ? 'disabledRedirect' : '');
			newItem.item = item;
			this.lstRedirects.appendChild(newItem);
			newItem.setAttribute('selected', false)
		}
		
		//Enable, disable functionality
		this.lstRedirects.addEventListener('click', function(ev) { 
			if (ev.originalTarget && ev.originalTarget.tagName == 'checkbox') {
				var parent = ev.originalTarget.parentNode;
				while (!parent.item) {
					parent = parent.parentNode;   
				}
				parent.item.disabled = !ev.originalTarget.hasAttribute('checked');
				parent.setAttribute('class', parent.item.disabled ? 'disabledRedirect' : '');
				Redirector.save();
			}
		},false);
	},
	
	moveUp : function(){
		if (this.lstRedirects.selectedIndex <= 0) {
			return;
		}
		this.switchItems(this.lstRedirects.selectedIndex-1);
	},

	moveDown : function() {
		if (this.lstRedirects.selectedIndex == Redirector.redirectCount-1) {
			return;
		}
		this.switchItems(this.lstRedirects.selectedIndex);
	},

	switchItems : function(firstIndex) {
		Redirector.switchItems(firstIndex, firstIndex+1);
		var firstItem = this.lstRedirects.children[firstIndex];
		var secondItem = this.lstRedirects.children[firstIndex+1];
		this.lstRedirects.removeChild(secondItem);
		this.lstRedirects.insertBefore(secondItem, firstItem);
		this.selectionChange();
	}, 
	
	setListItemValues : function(listItem, item){
		listItem.getElementsByAttribute('name', 'dscrIncludePattern')[0].setAttribute('value', item.includePattern);
		listItem.getElementsByAttribute('name', 'dscrExcludePattern')[0].setAttribute('value', item.excludePattern);
		listItem.getElementsByAttribute('name', 'dscrRedirectTo')[0].setAttribute('value', item.redirectUrl);
	},
	
	preferenceChange : function(event) {
		this.prefs[event.originalTarget.getAttribute('preference')] = event.originalTarget.hasAttribute('checked');
	},
	
	addRedirect : function() {
		var args = { saved : false, redirect : new Redirect() };
		window.openDialog("chrome://redirector/content/ui/editRedirect.xul", "redirect", "chrome,dialog,modal,centerscreen", args);
		if (args.saved) {
			Redirector.addRedirect(args.redirect);
			//Get it from redirector since it has processed it and it's no longer the same
			//object as the one we added.
			this.addItemsToListBox([Redirector.getRedirectAt(Redirector.redirectCount-1)]);
			this.selectionChange();
		}
	},

	editRedirect : function() {

		if (this.lstRedirects.selectedIndex == -1) {
			return;
		}
		//.selectedItem is still there after it has been removed, that's why we have the .selectedIndex check above as well
		var listItem = this.lstRedirects.selectedItem;
		if (!listItem) {
			return;
		}
		var redirect = listItem.item;
		var args = { saved: false, "redirect":redirect.clone()};
		window.openDialog("chrome://redirector/content/ui/editRedirect.xul", "redirect", "chrome,dialog,modal,centerscreen", args);

		if (args.saved) {
			redirect.copyValues(args.redirect);
			this.setListItemValues(listItem, redirect);
			Redirector.save();
			this.selectionChange(); 		   
		}
	},
	
	deleteRedirect : function() {
		var index = this.lstRedirects.selectedIndex;

		if (index == -1) {
			return;
		}
		
		var text = this.strings.getString("deleteConfirmationText");
		var title = this.strings.getString("deleteConfirmationTitle");
		var reallyDelete = Cc["@mozilla.org/embedcomp/prompt-service;1"].getService(Ci.nsIPromptService).confirm(null, title, text);
		if (!reallyDelete) {
			return;
		}		
		
		try {
			this.lstRedirects.removeChild(this.lstRedirects.children[index]);
			Redirector.deleteRedirectAt(index);
			this.selectionChange();
		} catch(e) {
			alert(e);
		}
	},
	
	listKeypress : function(event) {
		if (event.keyCode == 13) { //Enter button
			this.editRedirect();   
		} else if (event.keyCode == 46) { //Del button
			this.deleteRedirect();	 
		}
	},

	selectionChange : function() {
		if (!this.lstRedirects) {
			return;
		}
		var index = this.lstRedirects.selectedIndex;

		this.btnEdit.disabled = (index == -1);
		this.btnDelete.disabled = (index == -1);
		this.btnUp.disabled = (index <= 0);
		this.btnDown.disabled = (index == -1 || index >= Redirector.redirectCount-1);
		this.btnExport.disabled = (Redirector.redirectCount== 0);
	},

	getFile : function(captionKey, mode) {
		//Mostly borrowed from Adblock Plus
		var picker = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
		picker.init(window, this.strings.getString(captionKey), mode);
		picker.defaultExtension = ".rjson";
		var dir = this.prefs.defaultDir;
		if (dir) {
			picker.displayDirectory = new nsLocalFile(dir);
		}
		picker.appendFilter(this.strings.getString('redirectorFiles'), '*.rjson');
		
		if (picker.show() == picker.returnCancel) {
			return null;
		}
		this.prefs.defaultDir = picker.displayDirectory.path;
		return picker.file;
	},
	
	export : function() {
		var file = this.getFile('exportCaption', Ci.nsIFilePicker.modeSave);
		if (file) {
			Redirector.exportRedirects(file);
		}
	},
	
	import : function() {
		var file = this.getFile('importCaption', Ci.nsIFilePicker.modeOpen);
		var result;
		if (!file) {
			return;
		}
		result = Redirector.importRedirects(file);
		var msg, imported, existed;
		imported = result & 0xFFFF;
		existed = result >> 16;
		
		if (imported > 0) {
			msg = this.strings.getPluralized('importedMessage', imported);
			if (existed > 0) {
				msg += ', ' + this.strings.getPluralized('existedMessage',existed); 
			} else {
				msg += '.'; 
			}
		} else if (imported == 0 && existed > 0) {
			msg = this.strings.getPluralized('allExistedMessage', existed);
		} else { //Both 0
			msg = this.strings.getString('importedNone');
		}

		var title = this.strings.getString("importResult");
		Cc["@mozilla.org/embedcomp/prompt-service;1"].getService(Ci.nsIPromptService).alert(null, title, msg);

		if (imported > 0) {
			var newlist = [];
			for (var i = Redirector.redirectCount-imported; i < Redirector.redirectCount; i++) {
				newlist.push(Redirector.getRedirectAt(i));
			}				
			this.addItemsToListBox(newlist);
		}
	}
};