/**

 * vim: set ts=4 :

 * ================================================================

 * SourceMod

 * Copyright (C) 2004-2007 AlliedModders LLC.  All rights reserved.

 * ================================================================

 *

 * This program is free software; you can redistribute it and/or 

 * modify it under the terms of the GNU General Public License, 

 * version 3.0, as published by the Free Software Foundation.

 * 

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 *

 * As a special exception, AlliedModders LLC gives you permission to 

 * link the code of this program (as well as its derivative works) to 

 * "Half-Life 2," the "Source Engine," the "SourcePawn JIT," and any 

 * Game MODs that run on software by the Valve Corporation.  You must 

 * obey the GNU General Public License in all respects for all other 

 * code used. Additionally, AlliedModders LLC grants this exception 

 * to all derivative works. AlliedModders LLC defines further 

 * exceptions, found in LICENSE.txt (as of this writing, version 

 * JULY-31-2007), or <http://www.sourcemod.net/license.php>.

 *

 * Version: $Id$

 */

#include <string.h>

#include <stdlib.h>

#include "MenuVoting.h"

#include "PlayerManager.h"

#include "sourcemm_api.h"

void VoteMenuHandler::OnSourceModAllInitialized()

{

	g_Players.AddClientListener(this);

}

void VoteMenuHandler::OnSourceModShutdown()

{

	g_Players.RemoveClientListener(this);

}

unsigned int VoteMenuHandler::GetMenuAPIVersion2()

{

	return m_pHandler->GetMenuAPIVersion2();

}

void VoteMenuHandler::OnClientDisconnected(int client)

{

	if (!IsVoteInProgress())

	{

		return;

	}

	/* Wipe out their vote if they had one */

	int item;

	if ((item = m_ClientVotes[client]) >= 0)

	{

		assert((unsigned)item < m_Items);

		assert(m_Votes[item] > 0);

		m_Votes[item]--;

		m_ClientVotes[client] = -1;

	}

}

bool VoteMenuHandler::IsVoteInProgress()

{

	return (m_pCurMenu != NULL);

}

bool VoteMenuHandler::StartVote(IBaseMenu *menu, unsigned int num_clients, int clients[], unsigned int max_time, unsigned int flags/* =0 */)

{

	if (!InitializeVoting(menu, menu->GetHandler(), max_time, flags))

	{

		return false;

	}

	for (unsigned int i=0; i<num_clients; i++)

	{

		menu->Display(clients[i], max_time, this);

	}

	StartVoting();

	return true;

}

bool VoteMenuHandler::InitializeVoting(IBaseMenu *menu, 

									   IMenuHandler *handler,

									   unsigned int time,

									   unsigned int flags)

{

	if (IsVoteInProgress())

	{

		return false;

	}

	InternalReset();

	/* Mark all clients as not voting */

	for (int i=1; i<=gpGlobals->maxClients; i++)

	{

		m_ClientVotes[i] = -2;

	}

	m_Items = menu->GetItemCount();

	if (m_Votes.size() < (size_t)m_Items)

	{

		/* Only clear the items we need to... */

		size_t size = m_Votes.size();

		for (size_t i=0; i<size; i++)

		{

			m_Votes[i] = 0;

		}

		m_Votes.resize(m_Items, 0);

	} else {

		for (unsigned int i=0; i<m_Items; i++)

		{

			m_Votes[i] = 0;

		}

	}

	m_pCurMenu = menu;

	m_VoteTime = time;

	m_VoteFlags = flags;

	m_pHandler = handler;

	m_pHandler->OnMenuStart(m_pCurMenu);

	return true;

}

void VoteMenuHandler::StartVoting()

{

	if (!m_pCurMenu)

	{

		return;

	}

	m_bStarted = true;

	m_pHandler->OnMenuVoteStart(m_pCurMenu);

	/* By now we know how many clients were set.  

	 * If there are none, we should end IMMEDIATELY.

	 */

	if (m_Clients == 0)

	{

		EndVoting();

	}

}

void VoteMenuHandler::DecrementPlayerCount()

{

	assert(m_Clients > 0);

	m_Clients--;

	if (m_bStarted && m_Clients == 0)

	{

		EndVoting();

	}

}

int SortVoteItems(const void *item1, const void *item2)

{

	return ((menu_vote_result_t::menu_item_vote_t *)item2)->count 

		- ((menu_vote_result_t::menu_item_vote_t *)item1)->count;

}

void VoteMenuHandler::EndVoting()

{

	if (m_bCancelled)

	{

		/* If we were cancelled, don't bother tabulating anything.

		 * Reset just in case someone tries to redraw, which means

		 * we need to save our states.

		 */

		IBaseMenu *menu = m_pCurMenu;

		IMenuHandler *handler = m_pHandler;

		InternalReset();

		handler->OnMenuVoteCancel(menu);

		handler->OnMenuEnd(menu, MenuEnd_VotingCancelled);

		return;

	}

	menu_vote_result_t vote;

	menu_vote_result_t::menu_client_vote_t client_vote[256];

	menu_vote_result_t::menu_item_vote_t item_vote[256];

	memset(&vote, 0, sizeof(vote));

	/* Build the item list */

	for (unsigned int i=0; i<m_Items; i++)

	{

		if (m_Votes[i] > 0)

		{

			item_vote[vote.num_items].count = m_Votes[i];

			item_vote[vote.num_items].item = i;

			vote.num_votes += m_Votes[i];

			vote.num_items++;

		}

	}

	vote.item_list = item_vote;

	if (!vote.num_votes)

	{

		IBaseMenu *menu = m_pCurMenu;

		IMenuHandler *handler = m_pHandler;

		InternalReset();

		handler->OnMenuVoteCancel(menu);

		handler->OnMenuEnd(menu, MenuEnd_NoVotes);

		return;

	}

	/* Build the client list */

	for (int i=1; i<=gpGlobals->maxClients; i++)

	{

		if (m_ClientVotes[i] >= -1)

		{

			client_vote[vote.num_clients].client = i;

			client_vote[vote.num_clients].item = m_ClientVotes[i];

			vote.num_clients++;

		}

	}

	vote.client_list = client_vote;

	/* Sort the item list descending like we promised */

	qsort(item_vote,

		vote.num_items,

		sizeof(menu_vote_result_t::menu_item_vote_t),

		SortVoteItems);

	/* Save states, then clear what we've saved.

	 * This makes us re-entrant, which is always the safe way to go.

	 */

	IBaseMenu *menu = m_pCurMenu;

	IMenuHandler *handler = m_pHandler;

	InternalReset();

	/* Send vote info */

	handler->OnMenuVoteResults(menu, &vote);

	handler->OnMenuEnd(menu, MenuEnd_VotingDone);

}

void VoteMenuHandler::OnMenuStart(IBaseMenu *menu)

{

	m_Clients++;

}

void VoteMenuHandler::OnMenuEnd(IBaseMenu *menu, MenuEndReason reason)

{

	DecrementPlayerCount();

}

void VoteMenuHandler::OnMenuCancel(IBaseMenu *menu, int client, MenuCancelReason reason)

{

	m_pHandler->OnMenuCancel(menu, client, reason);

}

void VoteMenuHandler::OnMenuDisplay(IBaseMenu *menu, int client, IMenuPanel *display)

{

	m_ClientVotes[client] = -1;

	m_pHandler->OnMenuDisplay(menu, client, display);

}

unsigned int VoteMenuHandler::OnMenuDisplayItem(IBaseMenu *menu, int client, IMenuPanel *panel, unsigned int item, const ItemDrawInfo &dr)

{

	return m_pHandler->OnMenuDisplayItem(menu, client, panel, item, dr);

}

void VoteMenuHandler::OnMenuDrawItem(IBaseMenu *menu, int client, unsigned int item, unsigned int &style)

{

	m_pHandler->OnMenuDrawItem(menu, client, item, style);

}

void VoteMenuHandler::OnMenuSelect(IBaseMenu *menu, int client, unsigned int item)

{

	/* Check by our item count, NOT the vote array size */

	if (item < m_Items)

	{

		m_ClientVotes[client] = item;

		m_Votes[item]++;

		m_NumVotes++;

	}

	m_pHandler->OnMenuSelect(menu, client, item);

}

void VoteMenuHandler::InternalReset()

{

	m_Clients = 0;

	m_Items = 0;

	m_bStarted = false;

	m_pCurMenu = NULL;

	m_NumVotes = 0;

	m_bCancelled = false;

	m_pHandler = NULL;

}

void VoteMenuHandler::CancelVoting()

{

	if (m_bCancelled || !m_pCurMenu)

	{

		return;

	}

	m_bCancelled = true;

	m_pCurMenu->Cancel();

}

IBaseMenu *VoteMenuHandler::GetCurrentMenu()

{

	return m_pCurMenu;

}

bool VoteMenuHandler::IsCancelling()

{

	return m_bCancelled;

}