// ==UserScript==
// @name         SE Chat Status
// @description  Adds status coloring and messages to Stack Exchange Chat
// @include      http://chat.meta.stackoverflow.com/rooms/*
// @include      http://chat.stackexchange.com/rooms/*
// @include      http://chat.stackoverflow.com/rooms/*
// @include      http://chat.askubuntu.com/rooms/*
// @author       Josh Gitlin <sechatstatus@josh.gitlin.name>
// @version      v0.1a2 Alpha 2
// ==/UserScript==

/*
 * Injects functions into the page so they can freely interact with existing code
 */
function inject() {
	for (var i = 0; i < arguments.length; ++i) {
		if (typeof(arguments[i]) == 'function') {
			var script = document.createElement('script');

			script.type = 'text/javascript';
			script.textContent = '(' + arguments[i].toString() + ')(jQuery)';

			document.body.appendChild(script);
		}
	}
}

inject(function($)
{
	window.SEChatStatus = publicObj = {
		debug: false,
		
		statusControlRoomId: 359,
		
		userGravatarBorder: '2px solid',
		
		userGravatarMargin: '2px',
		
		getStatusTypes: function(){ return myStatusTypes; },
		
		setStatus: function(newStatus,statusType) { return myUpdateStatus(newStatus, statusType); }
	}
	
	var myStatusTypes = $.makeArray(['available', 'busy', 'away']);
	
	var myUserStatuses = {};
	
	var myGetCurrentUserid = function()
	{
		return $('#active-user').data('user');
	}
	
	var myUpdateStatus = function(newStatus, statusType)
	{
		var statusMsg = 'Status: ';
		
		if((typeof statusType == 'number') && statusType < myStatusTypes.length && statusType >= 0)
			statusMsg += myStatusTypes[statusType];
		else if((typeof statusType == 'string') && myStatusTypes.indexOf(statusType.toLowerCase()) != -1)
			statusMsg += statusType;
		else
			statusMsg += myStatusTypes[0];
		
		statusMsg += ' - '+newStatus;
		$.ajax({
			url:'/chats/'+publicObj.statusControlRoomId+'/messages/new',
			type:'POST',
			data: {
				'fkey':fkey().fkey,
				'text':statusMsg
			},
			cache:true
		});

		$.ajax({
			url:'/users/usermessage/'+myGetCurrentUserid(),
			type: 'POST',
			data: {
				'fkey':fkey().fkey,
				'message': statusMsg
			}
		});
		
		return true;
	}
	
	var myStatusSlashcommandHandler = function()
	{
		var args = $.makeArray(arguments),
		    statusType = myStatusTypes.indexOf(args[0].toLowerCase());
		
		if(statusType != -1)
			args.shift()
		
		myUpdateStatus(args.join(' '),statusType);
	}
	
	var myJoinControlRoom = function()
	{
		$.ajax('/rooms/'+publicObj.statusControlRoomId);
	}
	
	var myRefreshUserStatus = function(userId)
	{
		if(!users[userId])
		{
			console.log("Could not find users["+userId+"]");
		}
		
		var status = myUserStatuses['u'+userId] ? myUserStatuses['u'+userId] : {'type':-1, 'msg':''};
		
		var newTitle = users[userId].name + (status.msg.length ? ' - ' + status.msg : '');
		
		if(publicObj.debug)
			console.log('Refresh status for user:',userId,newTitle);
		
		var userGravatar = $('#present-user-'+userId+' img');
		
		userGravatar[0].title = newTitle;
		
		var border;
		
		switch(status.type)
		{
			case 2: border = publicObj.userGravatarBorder+' #c00'; break;
			
			case 1: border = publicObj.userGravatarBorder+' #c90'; break;
			
			case 0: border = publicObj.userGravatarBorder+' #0c0'; break;
			
			default:  border = publicObj.userGravatarBorder+' #999'; break;
		}
		
		userGravatar.css('border',border).css('margin', publicObj.userGravatarMargin);
		
		if(publicObj.debug)
			console.log('Set border style',userGravatar,border);
	}
	
	var myRefreshAllUserStatuses = function()
	{
		userIdRe=/present-user-([0-9]+)/;
		
		$('#present-users li').each(function(index,userLi){
			var userId = userLi.id.match(userIdRe)[1];
			
			myRefreshUserStatus(userId);
		});
	}
	
	var myParseControlRoomEventFeed = function(data)
	{
		if(data.e instanceof Array)
		{
			var len = data.e.length;
			for(e=0; e<len; ++e)
			{
				if(publicObj.debug)
					console.log('parse event #'+e,data.e[e]);
				
				if(data.e[e].event_type == 1)
				{
					var userId = data.e[e].user_id;
					
					var msgWords = data.e[e].content.split(' ');
					
					msgWords.shift();
					
					var statusType = myStatusTypes.indexOf(msgWords[0]);
					
					myUserStatuses['u'+userId] = {'type': statusType, 'msg': msgWords.join(' ')};
					
					if(publicObj.debug)
						console.log('Status change for user:',userId);
						
					myRefreshUserStatus(userId);
				}
			}
		}
	}
	
	var myHandleChatEventPoll = function(req)
	{
		var data = $.parseJSON(req.responseText);
		
		if(publicObj.debug)
			console.log('poll',req,data);
		
		var controlRoomData = data['r'+publicObj.statusControlRoomId]
		
		if(!controlRoomData)
			myJoinControlRoom();
		else
			myParseControlRoomEventFeed(controlRoomData);
	}
	
	var myGlobalAjaxCompleteHandler = function(event, XMLHttpRequest, ajaxOptions)
	{
		if(ajaxOptions.url == '/events')
			myHandleChatEventPoll(XMLHttpRequest);
	}
	
	var mySetInitialUserStatuses = function()
	{
		// Set all current user's status to "unknown", a gray border. We'll change these to colored borders as they change status
		$('#present-users img').css('border',publicObj.userGravatarBorder+' #999');
	}
	
	var myRefreshAllUserStatusesInterval;
	
	var init = function()
	{
		myRefreshAllUserStatuses();
		
		if(typeof ChatExtension == 'object')
			ChatExtension.define('status',myStatusSlashcommandHandler);
		
		$(document).ajaxComplete(myGlobalAjaxCompleteHandler);
		
		myRefreshAllUserStatusesInterval = window.setInterval(myRefreshAllUserStatuses,0.5);
	}
	
	init();
	
	return publicObj;
});