/**

  * vim: set ts=4 :

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

  * SourceMod Team Fortress 2 Extension

  * Copyright (C) 2004-2011 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 "util.h"

 #include "RegNatives.h"

 #include "iplayerinfo.h"

 #include "sm_trie_tpl.h"

 #include "criticals.h"

 #include "holiday.h"

 #include "conditions.h"

 #include "gameplayrules.h"

 #include "teleporter.h"

 #include "CDetour/detours.h"

 #include "ISDKHooks.h"

 /**

  * @file extension.cpp

  * @brief Implement extension code here.

  */

 TF2Tools g_TF2Tools;

 IGameConfig *g_pGameConf = NULL;

 IBinTools *g_pBinTools = NULL;

 ISDKHooks *g_pSDKHooks = NULL;

 SMEXT_LINK(&g_TF2Tools);

 ICvar *icvar = NULL;

 CGlobalVars *gpGlobals = NULL;

 sm_sendprop_info_t *playerSharedOffset;

 extern sp_nativeinfo_t g_TFNatives[];

 int g_resourceEntity;

 SH_DECL_HOOK3_void(IServerGameDLL, ServerActivate, SH_NOATTRIB, 0, edict_t *, int , int);

 bool TF2Tools::SDK_OnLoad(char *error, size_t maxlength, bool late)

 {

 	if (strcmp(g_pSM->GetGameFolderName(), "tf") != 0)

 	{

 		UTIL_Format(error, maxlength, "Cannot Load TF2 Extension on mods other than TF2");

 		return false;

 	}

 	ServerClass *sc = UTIL_FindServerClass("CTFPlayer");

 	if (sc == NULL)

 	{

 		UTIL_Format(error, maxlength, "Could not find CTFPlayer server class");

 		return false;

 	}

 	playerSharedOffset = new sm_sendprop_info_t;

 	if (!UTIL_FindDataTable(sc->m_pTable, "DT_TFPlayerShared", playerSharedOffset, 0))

 	{

 		UTIL_Format(error, maxlength, "Could not find DT_TFPlayerShared data table");

 		return false;

 	}

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

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

 	char conf_error[255] = "";

 	if (!gameconfs->LoadGameConfigFile("sm-tf2.games", &g_pGameConf, conf_error, sizeof(conf_error)))

 	{

 		if (conf_error[0])

 		{

 			UTIL_Format(error, maxlength, "Could not read sm-tf2.games.txt: %s", conf_error);

 		}

 		return false;

 	}

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

 	sharesys->AddNatives(myself, g_TFNatives);

 	sharesys->RegisterLibrary(myself, "tf2");

 	plsys->AddPluginsListener(this);

 	playerhelpers->RegisterCommandTargetProcessor(this);

 	playerhelpers->AddClientListener(this);

 	g_critForward = forwards->CreateForward("TF2_CalcIsAttackCritical", ET_Hook, 4, NULL, Param_Cell, Param_Cell, Param_String, Param_CellByRef);

 	g_isHolidayForward = forwards->CreateForward("TF2_OnIsHolidayActive", ET_Event, 2, NULL, Param_Cell, Param_CellByRef);

 	g_addCondForward = forwards->CreateForward("TF2_OnConditionAdded", ET_Ignore, 2, NULL, Param_Cell, Param_Cell);

 	g_removeCondForward = forwards->CreateForward("TF2_OnConditionRemoved", ET_Ignore, 2, NULL, Param_Cell, Param_Cell);

 	g_waitingPlayersStartForward = forwards->CreateForward("TF2_OnWaitingForPlayersStart", ET_Ignore, 0, NULL);

 	g_waitingPlayersEndForward = forwards->CreateForward("TF2_OnWaitingForPlayersEnd", ET_Ignore, 0, NULL);

 	g_teleportForward = forwards->CreateForward("TF2_OnPlayerTeleport", ET_Hook, 3, NULL, Param_Cell, Param_Cell, Param_CellByRef);

 	g_pCVar = icvar;

 	m_CritDetoursEnabled = false;

 	m_IsHolidayDetourEnabled = false;

 	m_CondChecksEnabled = false;

 	m_RulesDetoursEnabled = false;

 	m_TeleportDetourEnabled = false;

 	return true;

 }

 const char *TF2Tools::GetExtensionVerString()

 {

 	return SOURCEMOD_VERSION;

 }

 const char *TF2Tools::GetExtensionDateString()

 {

 	return SOURCEMOD_BUILD_TIME;

 }

 bool TF2Tools::SDK_OnMetamodLoad(ISmmAPI *ismm, char *error, size_t maxlen, bool late)

 {

 	GET_V_IFACE_CURRENT(GetEngineFactory, engine, IVEngineServer, INTERFACEVERSION_VENGINESERVER);

 	gpGlobals = ismm->GetCGlobals();

 	SH_ADD_HOOK(IServerGameDLL, ServerActivate, gamedll, SH_STATIC(OnServerActivate), true);

 	GET_V_IFACE_CURRENT(GetEngineFactory, icvar, ICvar, CVAR_INTERFACE_VERSION);

 	GET_V_IFACE_CURRENT(GetEngineFactory, m_GameEventManager, IGameEventManager2, INTERFACEVERSION_GAMEEVENTSMANAGER2);

 	m_GameEventManager->AddListener(this, "teamplay_restart_round", true);

 	return true;

 }

 void TF2Tools::SDK_OnUnload()

 {

 	SH_REMOVE_HOOK(IServerGameDLL, ServerActivate, gamedll, SH_STATIC(OnServerActivate), true);

 	g_RegNatives.UnregisterAll();

 	gameconfs->CloseGameConfigFile(g_pGameConf);

 	playerhelpers->UnregisterCommandTargetProcessor(this);

 	playerhelpers->RemoveClientListener(this);

 	plsys->RemovePluginsListener(this);

 	forwards->ReleaseForward(g_critForward);

 	forwards->ReleaseForward(g_isHolidayForward);

 	forwards->ReleaseForward(g_addCondForward);

 	forwards->ReleaseForward(g_removeCondForward);

 	forwards->ReleaseForward(g_waitingPlayersStartForward);

 	forwards->ReleaseForward(g_waitingPlayersEndForward);

 	forwards->ReleaseForward(g_teleportForward);

 	if (g_pSDKHooks != NULL)

 	{

 		g_pSDKHooks->RemoveEntityListener(&g_CritManager);

 	}

 }

 void TF2Tools::SDK_OnAllLoaded()

 {

 	SM_GET_LATE_IFACE(BINTOOLS, g_pBinTools);

 	SM_GET_LATE_IFACE(SDKHOOKS, g_pSDKHooks);

 	if (g_pSDKHooks != NULL)

 	{

 		g_pSDKHooks->AddEntityListener(&g_CritManager);

 	}

 }

 bool TF2Tools::RegisterConCommandBase(ConCommandBase *pVar)

 {

 	return g_SMAPI->RegisterConCommandBase(g_PLAPI, pVar);

 }

 void TF2Tools::FireGameEvent( IGameEvent *event )

 {

 	timersys->NotifyOfGameStart();

 	timersys->MapTimeLeftChanged();

 }

 bool TF2Tools::QueryRunning(char *error, size_t maxlength)

 {

 	SM_CHECK_IFACE(BINTOOLS, g_pBinTools);

 	SM_GET_LATE_IFACE(SDKHOOKS, g_pSDKHooks);

 	return true;

 }

 bool TF2Tools::QueryInterfaceDrop(SMInterface *pInterface)

 {

 	if (pInterface == g_pBinTools)

 	{

 		return false;

 	}

 	if (pInterface == g_pSDKHooks)

 	{

 		return false;

 	}

 	return IExtensionInterface::QueryInterfaceDrop(pInterface);

 }

 void TF2Tools::NotifyInterfaceDrop(SMInterface *pInterface)

 {

 	g_RegNatives.UnregisterAll();

 }

 void OnServerActivate(edict_t *pEdictList, int edictCount, int clientMax)

 {

 	g_resourceEntity = FindResourceEntity();

 }

 bool TF2Tools::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, "@red") == 0 )

 	{

 		team_index = 2;

 	}

 	else if (strcmp(info->pattern, "@blue") == 0)

 	{

 		team_index = 3;

 	}

 	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, "Red Team");

 	}

 	else if (team_index == 3)

 	{

 		UTIL_Format(info->target_name, info->target_name_maxlength, "Blue Team");

 	}

 	return true;

 }

 void TF2Tools::OnPluginLoaded(IPlugin *plugin)

 {

 	if (!m_CritDetoursEnabled && g_critForward->GetFunctionCount())

 	{

 		m_CritDetoursEnabled = g_CritManager.TryEnable();

 	}

 	if (!m_IsHolidayDetourEnabled && g_isHolidayForward->GetFunctionCount())

 	{

 		m_IsHolidayDetourEnabled = InitialiseIsHolidayDetour();

 	}

 	if (!m_CondChecksEnabled

 		&& ( g_addCondForward->GetFunctionCount() || g_removeCondForward->GetFunctionCount() )

 		)

 	{

 		m_CondChecksEnabled = InitialiseConditionChecks();

 	}

 	if (!m_RulesDetoursEnabled

 		&& ( g_waitingPlayersStartForward->GetFunctionCount() || g_waitingPlayersEndForward->GetFunctionCount() )

 		)

 	{

 		m_RulesDetoursEnabled = InitialiseRulesDetours();

 	}

 	if (!m_TeleportDetourEnabled && g_teleportForward->GetFunctionCount())

 	{

 		m_TeleportDetourEnabled = InitialiseTeleporterDetour();

 	}

 }

 void TF2Tools::OnPluginUnloaded(IPlugin *plugin)

 {

 	if (m_CritDetoursEnabled && !g_critForward->GetFunctionCount())

 	{

 		g_CritManager.Disable();

 		m_CritDetoursEnabled = false;

 	}

 	if (m_IsHolidayDetourEnabled && !g_isHolidayForward->GetFunctionCount())

 	{

 		RemoveIsHolidayDetour();

 		m_IsHolidayDetourEnabled = false;

 	}

 	if (m_CondChecksEnabled)

 	{

 		if (!g_addCondForward->GetFunctionCount() && !g_removeCondForward->GetFunctionCount())

 		{

 			RemoveConditionChecks();

 			m_CondChecksEnabled = false;

 		}

 	}

 	if (m_RulesDetoursEnabled)

 	{

 		if (!g_waitingPlayersStartForward->GetFunctionCount() && !g_waitingPlayersEndForward->GetFunctionCount())

 		{

 			RemoveRulesDetours();

 			m_RulesDetoursEnabled = false;

 		}

 	}

 	if (m_TeleportDetourEnabled && !g_teleportForward->GetFunctionCount())

 	{

 		RemoveTeleporterDetour();

 		m_TeleportDetourEnabled = false;

 	}

 }

 void TF2Tools::OnClientPutInServer(int client)

 {

 	Conditions_OnClientPutInServer(client);

 }

 int FindResourceEntity()

 {

 	return FindEntityByNetClass(-1, "CTFPlayerResource");

 }

 int FindEntityByNetClass(int start, const char *classname)

 {

 	edict_t *current;

 	for (int i = ((start != -1) ? start : 0); i < gpGlobals->maxEntities; i++)

 	{

 		current = engine->PEntityOfEntIndex(i);

 		if (current == NULL)

 		{

 			continue;

 		}

 		IServerNetworkable *network = current->GetNetworkable();

 		if (network == NULL)

 		{

 			continue;

 		}

 		ServerClass *sClass = network->GetServerClass();

 		const char *name = sClass->GetName();

 		if (strcmp(name, classname) == 0)

 		{

 			return i;

 		}

 	}

 	return -1;

 }

 TFClassType ClassnameToType(const char *classname)

 {

 	static KTrie<TFClassType> trie;

 	static bool filled = false;

 	if (!filled)

 	{

 		trie.insert("scout", TFClass_Scout);

 		trie.insert("sniper", TFClass_Sniper);

 		trie.insert("soldier", TFClass_Soldier);

 		trie.insert("demoman", TFClass_DemoMan);

 		trie.insert("demo", TFClass_DemoMan);

 		trie.insert("medic", TFClass_Medic);

 		trie.insert("heavy", TFClass_Heavy);

 		trie.insert("heavyweap", TFClass_Heavy);

 		trie.insert("heavyweapons", TFClass_Heavy);

 		trie.insert("hwg", TFClass_Heavy);

 		trie.insert("pyro", TFClass_Pyro);

 		trie.insert("spy", TFClass_Spy);

 		trie.insert("engineer", TFClass_Engineer);

 		trie.insert("engy", TFClass_Engineer);

 		filled = true;	

 	}

 	TFClassType *value;

 	if (!(value = trie.retrieve(classname)))

 	{

 		return TFClass_Unknown;	

 	}

 	return *value;

 }

 /**

  * A picture of a blue crab given to me as a gift and stored here for safe keeping

  *

  * http://sourcemod.net/Clown%20car.jpg

  */