/*
 * This file is a part of Winix
 * and is not publicly distributed
 * 
 * Copyright (c) 2008-2010, Tomasz Sowa
 * All rights reserved.
 * 
 */
 
#include "sessioncontainer.h"
#include "log.h"
#include "misc.h"



SessionContainer::SessionContainer()
{
	request = 0;
	table_size = 0;
	work_mode = 1; // threading work mode
}




void SessionContainer::SetRequest(Request * prequest)
{
	request = prequest;
}


void SessionContainer::SetConfig(Config * pconfig)
{
	config = pconfig;
}



void SessionContainer::Clear()
{
Table::iterator i = table.begin();

	// don't use table.clear();
	// because plugins session data would not be erased
	while( i != table.end() )
	{
		request->session = &(*i);
		table.erase(i++);
	}

	// erasing indexes
	index_id.clear();
	table_size = 0;
	request->session = 0;
}


void SessionContainer::SetLastContainer(LastContainer * plast_container)
{
	last_container = plast_container;
}


size_t SessionContainer::Size()
{
	// don't use table.size() as it has O(n) complexity on FreeBSD
	return table_size;
}


SessionContainer::Iterator SessionContainer::Begin()
{
	return table.begin();
}


SessionContainer::Iterator SessionContainer::End()
{
	return table.end();
}


Session & SessionContainer::Back()
{
	return table.back();	
}



bool SessionContainer::PushBack(const Session & session)
{
	std::pair<IndexId::iterator, bool> index_id_res = index_id.insert( std::make_pair(session.id, table.end()) );

	if( !index_id_res.second )
	{
		// that element already exists (was not inserted now)
		return false;
	}

	Iterator last = table.insert(table.end(), session);
	index_id_res.first->second = last;
	table_size += 1;

	log << log3 << "SC: added session, id: " << session.id << logend;

return true;
}




SessionContainer::Iterator SessionContainer::FindById(long id)
{
IndexId::iterator i;

	i = index_id.find(id);
	
	if( i == index_id.end() )
		return table.end();
		
return i->second;
}








/*
 *
 *
 *  sessions gc (another thread)
 *
 *
 */
void SessionContainer::Work()
{
bool exit = false;
IndexId::iterator i;

	Lock();
	i = index_id.begin();
	Unlock();

	while( !exit )
	{
		Lock();

		if( i == index_id.end() )
		{
			i = index_id.begin();
			WaitForSignalSleep(10);
			//WaitForSignalSleep(1);
		}
		else
		{
			if( IsSessionOutdated(*i->second) )
				DeleteSession(i++);	
			else
				++i;
		}

		exit = synchro->was_stop_signal;
		Unlock();
	}
}



// it's called from the other thread (with Lock and Unlock)
bool SessionContainer::IsSessionOutdated(const Session & s) const
{
bool outdated;

	if( s.remember_me )
		outdated = s.last_time < std::time(0) - config->session_remember_max_idle;
	else
		outdated = s.last_time < std::time(0) - config->session_max_idle;

return outdated;
}



// it's called from the other thread (with Lock and Unlock)
void SessionContainer::DeleteSession(SessionContainer::IndexId::iterator i)
{
	Session * old_session = 0;
	Session * del_session = &(*i->second);

	if( del_session != request->session )
		old_session = request->session;

	request->session = del_session;

	log << log4 << "SessionContainer: deleting outdated session, id: " << del_session->id << logend;

	if( del_session->puser )
		last_container->UserLogout(del_session->puser->id, del_session->id);

	table.erase(i->second);
	index_id.erase(i);
	table_size -= 1;

	// !! tu moze byc zero 
	request->session = old_session;
}
	
/*
 *
 *
 *  end of sessions gc
 *
 *
 */