/**

 * vim: set ts=4 :

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

 * SourceMod Counter-Strike:Source Extension

 * Copyright (C) 2004-2008 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 <sourcemod_version.h>

#include "extension.h"

#include "RegNatives.h"

#include "timeleft.h"

#include "iplayerinfo.h"

#include "ISDKTools.h"

#include "forwards.h"

/**

 * @file extension.cpp

 * @brief Implement extension code here.

 */

SH_DECL_HOOK6(IServerGameDLL, LevelInit, SH_NOATTRIB, false, bool, const char *, const char *, const char *, const char *, bool, bool);

CStrike g_CStrike;		/**< Global singleton for extension's main interface */

IBinTools *g_pBinTools = NULL;

IGameConfig *g_pGameConf = NULL;

IGameEventManager2 *gameevents = NULL;

bool hooked_everything = false;

int g_msgHintText = -1;

SMEXT_LINK(&g_CStrike);

extern sp_nativeinfo_t g_CSNatives[];

ISDKTools *g_pSDKTools = NULL;

bool CStrike::SDK_OnLoad(char *error, size_t maxlength, bool late)

{

	if (strcmp(g_pSM->GetGameFolderName(), "cstrike") != 0 && strcmp(g_pSM->GetGameFolderName(), "csgo") != 0)

	{

		snprintf(error, maxlength, "Cannot Load Cstrike Extension on mods other than CS:S and CS:GO");

		return false;

	}

	sharesys->AddDependency(myself, "bintools.ext", true, true);

	sharesys->AddDependency(myself, "sdktools.ext", false, true);

	char conf_error[255];

	if (!gameconfs->LoadGameConfigFile("sm-cstrike.games", &g_pGameConf, conf_error, sizeof(conf_error)))

	{

		if (error)

		{

			snprintf(error, maxlength, "Could not read sm-cstrike.games: %s", conf_error);

		}

		return false;

	}

	sharesys->AddNatives(myself, g_CSNatives);

	sharesys->RegisterLibrary(myself, "cstrike");

	plsys->AddPluginsListener(this);

	playerhelpers->RegisterCommandTargetProcessor(this);

	CDetourManager::Init(g_pSM->GetScriptingEngine(), g_pGameConf);

	g_pHandleBuyForward = forwards->CreateForward("CS_OnBuyCommand", ET_Event, 2, NULL, Param_Cell, Param_String);

	g_pPriceForward = forwards->CreateForward("CS_OnGetWeaponPrice", ET_Event, 3, NULL, Param_Cell, Param_String, Param_CellByRef);

	g_pTerminateRoundForward = forwards->CreateForward("CS_OnTerminateRound", ET_Event, 2, NULL, Param_FloatByRef, Param_CellByRef);

	g_pCSWeaponDropForward = forwards->CreateForward("CS_OnCSWeaponDrop", ET_Event, 2, NULL, Param_Cell, Param_Cell);

	m_TerminateRoundDetourEnabled = false;

	m_WeaponPriceDetourEnabled = false;

	m_HandleBuyDetourEnabled = false;

	m_CSWeaponDetourEnabled = false;

	return true;

}

bool CStrike::SDK_OnMetamodLoad(ISmmAPI *ismm, char *error, size_t maxlen, bool late)

{

	GET_V_IFACE_CURRENT(GetEngineFactory, gameevents, IGameEventManager2, INTERFACEVERSION_GAMEEVENTSMANAGER2);

	GET_V_IFACE_CURRENT(GetEngineFactory, engine, IVEngineServer, INTERFACEVERSION_VENGINESERVER);

	return true;

}

void CStrike::SDK_OnUnload()

{

	if (hooked_everything)

	{

		gameevents->RemoveListener(&g_TimeLeftEvents);

		SH_REMOVE_HOOK(IServerGameDLL, LevelInit, gamedll, SH_MEMBER(&g_TimeLeftEvents, &TimeLeftEvents::LevelInit), true);

		hooked_everything = false;

	}

	g_RegNatives.UnregisterAll();

	gameconfs->CloseGameConfigFile(g_pGameConf);

	plsys->RemovePluginsListener(this);

	playerhelpers->UnregisterCommandTargetProcessor(this);

	forwards->ReleaseForward(g_pHandleBuyForward);

	forwards->ReleaseForward(g_pPriceForward);

	forwards->ReleaseForward(g_pTerminateRoundForward);

	forwards->ReleaseForward(g_pCSWeaponDropForward);

}

void CStrike::SDK_OnAllLoaded()

{

	SM_GET_LATE_IFACE(SDKTOOLS, g_pSDKTools);

	if (g_pSDKTools == NULL)

	{

		smutils->LogError(myself, "SDKTools interface not found. TerminateRound native disabled.");

	}

	else if (g_pSDKTools->GetInterfaceVersion() < 2)

	{

		//<psychonic> THIS ISN'T DA LIMBO STICK. LOW IS BAD

		smutils->LogError(myself, "SDKTools interface is outdated. TerminateRound native disabled.");

	}

	gameevents->AddListener(&g_TimeLeftEvents, "round_start", true);

	gameevents->AddListener(&g_TimeLeftEvents, "round_end", true);

	SH_ADD_HOOK(IServerGameDLL, LevelInit, gamedll, SH_MEMBER(&g_TimeLeftEvents, &TimeLeftEvents::LevelInit), true);

	hooked_everything = true;

	SM_GET_LATE_IFACE(BINTOOLS, g_pBinTools);

}

bool CStrike::QueryRunning(char *error, size_t maxlength)

{

	SM_CHECK_IFACE(BINTOOLS, g_pBinTools);

	return true;

}

bool CStrike::QueryInterfaceDrop(SMInterface *pInterface)

{

	if (pInterface == g_pBinTools)

	{

		return false;

	}

	return IExtensionInterface::QueryInterfaceDrop(pInterface);

}

void CStrike::NotifyInterfaceDrop(SMInterface *pInterface)

{

	g_RegNatives.UnregisterAll();

}

size_t UTIL_Format(char *buffer, size_t maxlength, const char *fmt, ...)

{

	va_list ap;

	va_start(ap, fmt);

	size_t len = vsnprintf(buffer, maxlength, fmt, ap);

	va_end(ap);

	if (len >= maxlength)

	{

		buffer[maxlength - 1] = '\0';

		return (maxlength - 1);

	}

	else

	{

		return len;

	}

}

bool CStrike::ProcessCommandTarget(cmd_target_info_t *info)

{

	int max_clients;

	IPlayerInfo *pInfo;

	unsigned int team_index = 0;

	IGamePlayer *pPlayer, *pAdmin;

	if ((info->flags & COMMAND_FILTER_NO_MULTI) == COMMAND_FILTER_NO_MULTI)

	{

		return false;

	}

	if (info->admin)

	{

		if ((pAdmin = playerhelpers->GetGamePlayer(info->admin)) == NULL)

		{

			return false;

		}

		if (!pAdmin->IsInGame())

		{

			return false;

		}

	}

	else

	{

		pAdmin = NULL;

	}

	if (strcmp(info->pattern, "@ct") == 0 || strcmp(info->pattern, "@cts") == 0)

	{

		team_index = 3;

	}

	else if (strcmp(info->pattern, "@t") == 0 || strcmp(info->pattern, "@ts") == 0)

	{

		team_index = 2;

	}

	else

	{

		return false;

	}

	info->num_targets = 0;

	max_clients = playerhelpers->GetMaxClients();

	for (int i = 1; 

		 i <= max_clients && (cell_t)info->num_targets < info->max_targets; 

		 i++)

	{

		if ((pPlayer = playerhelpers->GetGamePlayer(i)) == NULL)

		{

			continue;

		}

		if (!pPlayer->IsInGame())

		{

			continue;

		}

		if ((pInfo = pPlayer->GetPlayerInfo()) == NULL)

		{

			continue;

		}

		if (pInfo->GetTeamIndex() != (int)team_index)

		{

			continue;

		}

		if (playerhelpers->FilterCommandTarget(pAdmin, pPlayer, info->flags) 

			!= COMMAND_TARGET_VALID)

		{

			continue;

		}

		info->targets[info->num_targets] = i;

		info->num_targets++;

	}

	if (info->num_targets == 0)

	{

		info->reason = COMMAND_TARGET_EMPTY_FILTER;

	}

	else

	{

		info->reason = COMMAND_TARGET_VALID;

	}

	info->target_name_style = COMMAND_TARGETNAME_RAW;

	if (team_index == 2)

	{

		UTIL_Format(info->target_name, info->target_name_maxlength, "Terrorists");

	}

	else if (team_index == 3)

	{

		UTIL_Format(info->target_name, info->target_name_maxlength, "CTs");

	}

	return true;

}

const char *CStrike::GetExtensionVerString()

{

	return SOURCEMOD_VERSION;

}

const char *CStrike::GetExtensionDateString()

{

	return SOURCEMOD_BUILD_TIME;

}

void CStrike::OnPluginLoaded(IPlugin *plugin)

{

	if (!m_WeaponPriceDetourEnabled && g_pPriceForward->GetFunctionCount())

	{

		m_WeaponPriceDetourEnabled = CreateWeaponPriceDetour();

		if (m_WeaponPriceDetourEnabled)

			m_HandleBuyDetourEnabled = true;

	}

	if (!m_TerminateRoundDetourEnabled && g_pTerminateRoundForward->GetFunctionCount())

	{

		m_TerminateRoundDetourEnabled = CreateTerminateRoundDetour();

	}

	if (!m_HandleBuyDetourEnabled && g_pHandleBuyForward->GetFunctionCount())

	{

		m_HandleBuyDetourEnabled = CreateHandleBuyDetour();

	}

	if (!m_CSWeaponDetourEnabled && g_pCSWeaponDropForward->GetFunctionCount())

	{

		m_CSWeaponDetourEnabled = CreateCSWeaponDropDetour();

	}

}

void CStrike::OnPluginUnloaded(IPlugin *plugin)

{

	if (m_WeaponPriceDetourEnabled && !g_pPriceForward->GetFunctionCount())

	{

		RemoveWeaponPriceDetour();

		m_WeaponPriceDetourEnabled = false;

	}

	if (m_TerminateRoundDetourEnabled && !g_pTerminateRoundForward->GetFunctionCount())

	{

		RemoveTerminateRoundDetour();

		m_TerminateRoundDetourEnabled = false;

	}

	if (m_HandleBuyDetourEnabled && !g_pHandleBuyForward->GetFunctionCount())

	{

		RemoveHandleBuyDetour();

		m_HandleBuyDetourEnabled = false;

	}

	if (m_CSWeaponDetourEnabled && !g_pCSWeaponDropForward->GetFunctionCount())

	{

		RemoveCSWeaponDropDetour();

		m_CSWeaponDetourEnabled = false;;

	}

}