/**
 * EGroupware clientside API: opening of windows, popups or application entries
 *
 * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
 * @package etemplate
 * @subpackage api
 * @link http://www.egroupware.org
 * @author Andreas Stöckel (as AT stylite.de)
 * @author Ralf Becker <RalfBecker@outdoor-training.de>
 * @version $Id$
 */

"use strict";

/*egw:uses
	egw_core;
	egw_links;
*/

/**
 * @augments Class
 */
egw.extend('open', egw.MODULE_WND_LOCAL, function(_egw, _wnd) {
	
	
	/**
	 * Store a window's name in egw.store so we can have a list of open windows
	 * 
	 * @param {string} appname
	 * @param {Window} popup
	 */
	function _storeWindow(appname, popup)
	{
		// Don't store if it has no name
		if(!popup.name || ['_blank'].indexOf(popup.name) >= 0)
		{
			return;
		}
		
		var _target_app = appname || this.appName || egw_appName || 'common';
		var open_windows = JSON.parse(this.getSessionItem(_target_app, 'windows')) || [];
		if(open_windows.indexOf(popup.name) < 0)
		{
			open_windows.push(popup.name);
			this.setSessionItem(_target_app, 'windows', JSON.stringify(open_windows));
		}

		// Forget window when it closes
		// Window should notify, but we'll poll too since onunload is not fully supported
		var _egw = this;
		(function() {
			var app = _target_app;
			var window_name = popup.name;
			var poll_timer = popup.setInterval(function() {
				if(popup.closed !== false) {
					this.clearInterval(poll_timer);
					egw.windowClosed(app, window_name);
				}
			},1000);
		})();
	}
	
	/**
	 * Magic handling for mailto: uris using mail application.
	 * 
	 * We check for open compose windows and add the address in as specified in
	 * the URL.  If there are no open compose windows, a new one is opened.  If
	 * there are more than one open compose window, we prompt for which one to
	 * use.
	 * 
	 * The user must have set the 'Open EMail addresses in external mail program' preference
	 * to No, otherwise the browser will handle it.
	 * 
	 * @param {String} uri
	 */
	function mailto(uri)
	{
		// Parse uri into a map
		var match = uri.match(/^mailto:([^?]+)\??(([^=]+)([^&]+))*$/);
		var content = {
			to: match[1]
		}
		for(var i = 2; i < match.length; i+=2)
		{
			if(match[i+1])
			{
				content[match[i]] = content[match[i+1]];
			}
		}
		
		// Get open compose windows
		var compose = egw.getOpenWindows("mail", /^compose_/);
		if(compose.length == 0)
		{
			// No compose windows, might be no mail app.js
			// We really want to use mail_compose() here
			egw.open('','mail','add',{'preset[mailto]': uri},'compose__','mail')
		}
		if(compose.length == 1)
		{
			try {
				var popup = egw.open_link('',compose[0],'100x100','mail');
				popup.app.mail.setCompose(compose[0], content);
			} catch(e) {
				// Looks like a leftover window that wasn't removed from the list
				egw.debug("warn", e.message);
				popup.close();
				egw.windowClosed("mail",popup);
				window.setTimeout(function() {
					egw.open_link(uri);
					console.debug("Trying again with ", uri);
				}, 500);
			}
		}
		else if(compose.length > 1)
		{
			// Need to prompt
			var prompt = $j(document.createElement('ul'));
			for(var i = 0; i < compose.length; i++)
			{
				var w = window.open('',compose[i],'100x100');
				if(w.closed) continue;
				var title = w.document.title || egw.lang("compose");
				$j("<li data-window = '" + compose[i] + "'>"+ title + "</li>")
					.click(function() {
						var w = egw.open_link('',$j(this).attr("data-window"),'100x100','mail');
						w.app.mail.setCompose(w.name, content);
						prompt.dialog("close");
					})
					.appendTo(prompt);
			}
			_wnd.setTimeout(function() {
				this.focus();
			}, 200);
			var _buttons = {};
			_buttons[egw.lang("cancel")] = function() {
				$j(this).dialog("close");
			};
			prompt.dialog({
				buttons: _buttons
			});
		}
	}
	
	return {
		/**
		 * View an EGroupware entry: opens a popup of correct size or redirects window.location to requested url
		 * 
		 * Examples: 
		 * - egw.open(123,'infolog') or egw.open('infolog:123') opens popup to edit or view (if no edit rights) infolog entry 123
		 * - egw.open('infolog:123','timesheet','add') opens popup to add new timesheet linked to infolog entry 123
		 * - egw.open(123,'addressbook','view') opens addressbook view for entry 123 (showing linked infologs)
		 * - egw.open('','addressbook','view_list',{ search: 'Becker' }) opens list of addresses containing 'Becker'
		 * 
		 * @param string|int|object id_data either just the id or if app=="" "app:id" or object with all data
		 * 	to be able to open files you need to give: (mine-)type, path or id, app2 and id2 (path=/apps/app2/id2/id"
		 * @param string app app-name or empty (app is part of id)
		 * @param string type default "edit", possible "view", "view_list", "edit" (falls back to "view") and "add"
		 * @param object|string extra extra url parameters to append as object or string
		 * @param string target target of window to open
		 * @param string target_app target application to open in that tab
		 * @memberOf egw
		 */
		open: function(id_data, app, type, extra, target, target_app)
		{
			var id;
			if(typeof target === 'undefined')
			{
				target = '_blank';
			}
			if (!app)
			{
				if (typeof id_data != 'object')
				{
					var app_id = id_data.split(':',2);
					app = app_id[0];
					id = app_id[1];
				}
				else
				{
					app = id_data.app;
					id = id_data.id;
				}
			}
			else if (app != 'file')
			{
				id = id_data;
				id_data = { 'id': id, 'app': app, 'extra': extra };
			}
			var url;
			var popup;
			var params;
			if (app == 'file')
			{
				url = this.mime_open(id_data);
				if (typeof url == 'object')
				{
			 		if(typeof url.mime_popup != 'undefined')
					{
						popup = url.mime_popup;
						delete url.mime_popup;
					}
			 		if(typeof url.mime_target != 'undefined')
					{
						target = url.mime_target;
						delete url.mime_target;
					}
					params = url;
					url = '/index.php';
				}
			}
			else
			{
				var app_registry = this.link_get_registry(app);
				
				if (!app || !app_registry)
				{
					alert('egw.open() app "'+app+'" NOT defined in link registry!');
					return;	
				}
				if (typeof type == 'undefined') type = 'edit';
				if (type == 'edit' && typeof app_registry.edit == 'undefined') type = 'view';
				if (typeof app_registry[type] == 'undefined')
				{
					alert('egw.open() type "'+type+'" is NOT defined in link registry for app "'+app+'"!');
					return;	
				}
				url = '/index.php';
				params = app_registry[type];
				if (type == 'view' || type == 'edit')	// add id parameter for type view or edit
				{
					params[app_registry[type+'_id']] = id;
				}
				else if (type == 'add' && id)	// add add_app and app_id parameters, if given for add
				{
					var app_id = id.split(':',2);
					params[app_registry.add_app] = app_id[0];
					params[app_registry.add_id] = app_id[1];
				}
				
				if (typeof extra == 'string')
				{
					url += '?'+extra;
				}
				else if (typeof extra == 'object')
				{
					$j.extend(params, extra);
				}
				popup = app_registry[type+'_popup'];
			}
			return this.open_link(this.link(url, params), target, popup, target_app);
		},
		
		/**
		 * Open a link, which can be either a menuaction, a EGroupware relative url or a full url
		 * 
		 * @param string _link menuaction, EGroupware relative url or a full url (incl. "mailto:" or "javascript:")
		 * @param string _target optional target / window name
		 * @param string _popup widthxheight, if a popup should be used
		 * @param string _target_app app-name for opener
		 */
		open_link: function(_link, _target, _popup, _target_app)
		{
			var url = _link;
			if (url.indexOf('javascript:') == 0)
			{
				eval(url.substr(11));
				return;
			}
			if (url.indexOf('mailto:') == 0)
			{
				return mailto(url);
			}
			// link is not necessary an url, it can also be a menuaction!
			if (url.indexOf('/') == -1 && url.split('.').length >= 3 &&
				!(url.indexOf('mailto:') == 0 || url.indexOf('/index.php') == 0 || url.indexOf('://') != -1))
			{
				url = "/index.php?menuaction="+url;
			}
			// append the url to the webserver url, if not already contained or empty
			if (url[0] == '/' && this.webserverUrl && this.webserverUrl != '/' && url.indexOf(this.webserverUrl+'/') != 0)
			{
				url = this.webserverUrl + url;
			}
			if (_popup)
			{
				var w_h = _popup.split('x');
				if (w_h[1] == 'egw_getWindowOuterHeight()') w_h[1] = egw_getWindowOuterHeight();
				var popup_window = _wnd.egw_openWindowCentered2(url, _target, w_h[0], w_h[1], false, _target_app, true);
				
				// Remember which windows are open
				_storeWindow.call(this, _target_app, popup_window);
				
				return popup_window;
			}
			else if (typeof _wnd.egw_link_handler == 'function' && (typeof _target == 'undefined' || _target =='_self' || typeof this.link_app_list()[_target] != "undefined"))
			{
				if(_target == '_self')
				{
					// '_self' isn't allowed, but we can handle it
					_target = undefined;
				}
				// Use framework's link handler, if present
				return _wnd.egw_link_handler(url,_target);
			}
			else if (_target == '_self')
			{
				_wnd.location.href = url;
			}
			else
			{
				return _wnd.open(url, _target);
			}
		},
		
		/**
		 * Get a list of the names of open popups
		 * 
		 * Using the name, you can get a reference to the popup using:
		 * window.open('', name);
		 * Popups that were not given a name when they were opened are not tracked.
		 * 
		 * @param {string} appname Application that owns/opened the popup
		 * @param {string} regex Optionally filter names by the given regular expression
		 * 
		 * @returns {string[]} List of window names
		 */
		getOpenWindows: function(appname, regex) {
			var open_windows = JSON.parse(this.getSessionItem(appname, 'windows')) || [];
			if(typeof regex == 'undefined')
			{
				return open_windows;
			}
			var list = []
			for(var i = 0; i < open_windows.length; i++)
			{
				if(open_windows[i].match(regex))
				{
					list.push(open_windows[i]);
				}
			}
			return list;
		},
		
		/**
		 * Notify egw of closing a named window
		 * 
		 * @param {String} appname
		 * @param {Window|String} closed Window that was closed, or its name
		 * @returns {undefined}
		 */
		windowClosed: function(appname, closed) {
			var closed_name = typeof closed == "string" ? closed : closed.name;
			var closed_window = typeof closed == "string" ? null : closed;
			window.setTimeout(function() {
				if(closed_window != null && !closed_window.closed) return;
				var open_windows = egw.getOpenWindows(appname, closed_name)

				var index = open_windows.indexOf(closed_name);
				if(index >= 0)
				{
					open_windows.splice(index,1);
				}
				egw.setSessionItem(appname, 'windows', JSON.stringify(open_windows));
			}, 100);
		}
	};
});


// Add protocol handler as an option if mail handling is not forced so mail can handle mailto:
/* Not working consistantly yet
$j(function() {
try {
	if(egw.user('apps').mail && (egw.preference('force_mailto','addressbook')||true) != '0')
	{
		var params = egw.link_get_registry('mail','add');
		if(params)
		{
			params['preset[mailto]'] = ''; // %s, but egw.link will encode it
			navigator.registerProtocolHandler("mailto",egw.link('/index.php', params)+'%s', egw.lang('mail'));
		}
	}
} catch (e) {}
});
*/