/**

 * vim: set ts=4 :

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

 * SourceMod SDKTools 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 "tempents.h"

#include "CellRecipientFilter.h"

#include <IForwardSys.h>

SH_DECL_HOOK5_void(IVEngineServer, PlaybackTempEntity, SH_NOATTRIB, 0, IRecipientFilter &, float, const void *, const SendTable *, int);

CellRecipientFilter g_TERecFilter;

TempEntityInfo *g_CurrentTE = NULL;

int g_TEPlayers[256];

bool tenatives_initialized = false;

/*************************

*                        *

* Temp Entity Hook Class *

*                        *

**************************/

void TempEntHooks::Initialize()

{

	m_TEHooks = adtfactory->CreateBasicTrie();

	plsys->AddPluginsListener(this);

	tenatives_initialized = true;

}

void TempEntHooks::Shutdown()

{

	if (!tenatives_initialized)

	{

		return;

	}

	plsys->RemovePluginsListener(this);

	SourceHook::List<TEHookInfo *>::iterator iter;

	for (iter=m_HookInfo.begin(); iter!=m_HookInfo.end(); iter++)

	{

		delete (*iter);

	}

	if (m_HookCount)

	{

		m_HookCount = 1;

		_DecRefCounter();

	}

	m_TEHooks->Destroy();

	tenatives_initialized = false;

}

void TempEntHooks::OnPluginUnloaded(IPlugin *plugin)

{

	SourceHook::List<TEHookInfo *>::iterator iter = m_HookInfo.begin();

	IPluginContext *pContext = plugin->GetBaseContext();

	/* For each hook list... */

	while (iter != m_HookInfo.end())

	{

		SourceHook::List<IPluginFunction *>::iterator f_iter = (*iter)->lst.begin();

		/* Find the hooks on the given temp entity */

		while (f_iter != (*iter)->lst.end())

		{

			/* If it matches, remove it and dec the ref count */

			if ((*f_iter)->GetParentContext() == pContext)

			{

				f_iter = (*iter)->lst.erase(f_iter);

				_DecRefCounter();

			}

			else

			{

				f_iter++;

			}

		}

		/* If there are no more hooks left, we can safely 

		 * remove it from the cache and remove its list.

		 */

		if ((*iter)->lst.size() == 0)

		{

			m_TEHooks->Delete((*iter)->te->GetName());

			delete (*iter);

			iter = m_HookInfo.erase(iter);

		}

		else

		{

			iter++;

		}

	}

}

void TempEntHooks::_IncRefCounter()

{

	if (m_HookCount++ == 0)

	{

		SH_ADD_HOOK(IVEngineServer, PlaybackTempEntity, engine, SH_MEMBER(this, &TempEntHooks::OnPlaybackTempEntity), false);

	}

}

void TempEntHooks::_DecRefCounter()

{

	if (--m_HookCount == 0)

	{

		SH_REMOVE_HOOK(IVEngineServer, PlaybackTempEntity, engine, SH_MEMBER(this, &TempEntHooks::OnPlaybackTempEntity), false);

	}

}

size_t TempEntHooks::_FillInPlayers(int *pl_array, IRecipientFilter *pFilter)

{

	size_t size = static_cast<size_t>(pFilter->GetRecipientCount());

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

	{

		pl_array[i] = pFilter->GetRecipientIndex(i);

	}

	return size;

}

bool TempEntHooks::AddHook(const char *name, IPluginFunction *pFunc)

{

	TEHookInfo *pInfo;

	if (m_TEHooks->Retrieve(name, reinterpret_cast<void **>(&pInfo)))

	{

		pInfo->lst.push_back(pFunc);

	} else {

		TempEntityInfo *te;

		if (!(te=g_TEManager.GetTempEntityInfo(name)))

		{

			return false;

		}

		pInfo = new TEHookInfo;

		pInfo->te = te;

		pInfo->lst.push_back(pFunc);

		m_TEHooks->Insert(name, reinterpret_cast<void *>(pInfo));

		m_HookInfo.push_back(pInfo);

	}

	_IncRefCounter();

	return true;

}

bool TempEntHooks::RemoveHook(const char *name, IPluginFunction *pFunc)

{

	TEHookInfo *pInfo;

	if (m_TEHooks->Retrieve(name, reinterpret_cast<void **>(&pInfo)))

	{

		SourceHook::List<IPluginFunction *>::iterator iter;

		if ((iter=pInfo->lst.find(pFunc)) != pInfo->lst.end())

		{

			pInfo->lst.erase(iter);

			if (pInfo->lst.empty())

			{

				m_HookInfo.remove(pInfo);

				m_TEHooks->Delete(name);

				delete pInfo;

			}

			_DecRefCounter();

		} else {

			return false;

		}

	} else {

		return false;

	}

	return true;

}

void TempEntHooks::OnPlaybackTempEntity(IRecipientFilter &filter, float delay, const void *pSender, const SendTable *pST, int classID)

{

	TEHookInfo *pInfo;

	const char *name = g_TEManager.GetNameFromThisPtr(const_cast<void *>(pSender));

	if (m_TEHooks->Retrieve(name, reinterpret_cast<void **>(&pInfo)))

	{

		SourceHook::List<IPluginFunction *>::iterator iter;

		IPluginFunction *pFunc;

		size_t size;

		cell_t res = static_cast<ResultType>(Pl_Continue);

		TempEntityInfo *oldinfo = g_CurrentTE;

		g_CurrentTE = pInfo->te;

		size = _FillInPlayers(g_TEPlayers, &filter);

		for (iter=pInfo->lst.begin(); iter!=pInfo->lst.end(); iter++)

		{

			pFunc = (*iter);

			pFunc->PushString(name);

			pFunc->PushArray(g_TEPlayers, size);

			pFunc->PushCell(size);

			pFunc->PushFloat(delay);

			pFunc->Execute(&res);

			if (res != Pl_Continue)

			{

				g_CurrentTE = oldinfo;

				RETURN_META(MRES_SUPERCEDE);

			}

		}

		g_CurrentTE = oldinfo;

		RETURN_META(MRES_IGNORED);

	}

}

/**********************

*                     *

* Temp Entity Natives *

*                     *

***********************/

TempEntHooks s_TempEntHooks;

static cell_t smn_TEStart(IPluginContext *pContext, const cell_t *params)

{

	if (!g_TEManager.IsAvailable())

	{

		return pContext->ThrowNativeError("TempEntity System unsupported or not available, file a bug report");

	}

	char *name;

	pContext->LocalToString(params[1], &name);

	g_CurrentTE = g_TEManager.GetTempEntityInfo(name);

	if (!g_CurrentTE)

	{

		return pContext->ThrowNativeError("Invalid TempEntity name: \"%s\"", name);

	}

	return 1;

}

static cell_t smn_TEWriteNum(IPluginContext *pContext, const cell_t *params)

{

	if (!g_TEManager.IsAvailable())

	{

		return pContext->ThrowNativeError("TempEntity System unsupported or not available, file a bug report");

	}

	if (!g_CurrentTE)

	{

		return pContext->ThrowNativeError("No TempEntity call is in progress");

	}

	char *prop;

	pContext->LocalToString(params[1], &prop);

	if (!g_CurrentTE->TE_SetEntData(prop, params[2]))

	{

		return pContext->ThrowNativeError("Temp entity property \"%s\" not found", prop);

	}

	return 1;

}

static cell_t smn_TEReadNum(IPluginContext *pContext, const cell_t *params)

{

	if (!g_TEManager.IsAvailable())

	{

		return pContext->ThrowNativeError("TempEntity System unsupported or not available, file a bug report");

	}

	if (!g_CurrentTE)

	{

		return pContext->ThrowNativeError("No TempEntity call is in progress");

	}

	char *prop;

	int val;

	pContext->LocalToString(params[1], &prop);

	if (!g_CurrentTE->TE_GetEntData(prop, &val))

	{

		return pContext->ThrowNativeError("Temp entity property \"%s\" not found", prop);

	}

	return val;

}

static cell_t smn_TE_WriteFloat(IPluginContext *pContext, const cell_t *params)

{

	if (!g_TEManager.IsAvailable())

	{

		return pContext->ThrowNativeError("TempEntity System unsupported or not available, file a bug report");

	}

	if (!g_CurrentTE)

	{

		return pContext->ThrowNativeError("No TempEntity call is in progress");

	}

	char *prop;

	pContext->LocalToString(params[1], &prop);

	if (!g_CurrentTE->TE_SetEntDataFloat(prop, sp_ctof(params[2])))

	{

		return pContext->ThrowNativeError("Temp entity property \"%s\" not found", prop);

	}

	return 1;

}

static cell_t smn_TE_ReadFloat(IPluginContext *pContext, const cell_t *params)

{

	if (!g_TEManager.IsAvailable())

	{

		return pContext->ThrowNativeError("TempEntity System unsupported or not available, file a bug report");

	}

	if (!g_CurrentTE)

	{

		return pContext->ThrowNativeError("No TempEntity call is in progress");

	}

	char *prop;

	float val;

	pContext->LocalToString(params[1], &prop);

	if (!g_CurrentTE->TE_GetEntDataFloat(prop, &val))

	{

		return pContext->ThrowNativeError("Temp entity property \"%s\" not found", prop);

	}

	return sp_ftoc(val);

}

static cell_t smn_TEWriteVector(IPluginContext *pContext, const cell_t *params)

{

	if (!g_TEManager.IsAvailable())

	{

		return pContext->ThrowNativeError("TempEntity System unsupported or not available, file a bug report");

	}

	if (!g_CurrentTE)

	{

		return pContext->ThrowNativeError("No TempEntity call is in progress");

	}

	char *prop;

	pContext->LocalToString(params[1], &prop);

	cell_t *addr;

	pContext->LocalToPhysAddr(params[2], &addr);

	float vec[3] = {sp_ctof(addr[0]), sp_ctof(addr[1]), sp_ctof(addr[2])};

	if (!g_CurrentTE->TE_SetEntDataVector(prop, vec))

	{

		return pContext->ThrowNativeError("Temp entity property \"%s\" not found", prop);

	}

	return 1;

}

static cell_t smn_TEReadVector(IPluginContext *pContext, const cell_t *params)

{

	if (!g_TEManager.IsAvailable())

	{

		return pContext->ThrowNativeError("TempEntity System unsupported or not available, file a bug report");

	}

	if (!g_CurrentTE)

	{

		return pContext->ThrowNativeError("No TempEntity call is in progress");

	}

	char *prop;

	pContext->LocalToString(params[1], &prop);

	cell_t *addr;

	float vec[3];

	pContext->LocalToPhysAddr(params[2], &addr);

	if (!g_CurrentTE->TE_GetEntDataVector(prop, vec))

	{

		return pContext->ThrowNativeError("Temp entity property \"%s\" not found", prop);

	}

	addr[0] = sp_ftoc(vec[0]);

	addr[1] = sp_ftoc(vec[1]);

	addr[2] = sp_ftoc(vec[2]);

	return 1;

}

static cell_t smn_TEWriteFloatArray(IPluginContext *pContext, const cell_t *params)

{

	if (!g_TEManager.IsAvailable())

	{

		return pContext->ThrowNativeError("TempEntity System unsupported or not available, file a bug report");

	}

	if (!g_CurrentTE)

	{

		return pContext->ThrowNativeError("No TempEntity call is in progress");

	}

	char *prop;

	pContext->LocalToString(params[1], &prop);

	cell_t *addr;

	pContext->LocalToPhysAddr(params[2], &addr);

	if (!g_CurrentTE->TE_SetEntDataFloatArray(prop, addr, params[3]))

	{

		return pContext->ThrowNativeError("Temp entity property \"%s\" not found", prop);

	}

	return 1;

}

static cell_t smn_TESend(IPluginContext *pContext, const cell_t *params)

{

	if (!g_TEManager.IsAvailable())

	{

		return pContext->ThrowNativeError("TempEntity System unsupported or not available, file a bug report");

	}

	if (!g_CurrentTE)

	{

		return pContext->ThrowNativeError("No TempEntity call is in progress");

	}

	cell_t *cl_array;

	unsigned int numClients;

	int client;

	IGamePlayer *pPlayer = NULL;

	pContext->LocalToPhysAddr(params[1], &cl_array);

	numClients = params[2];

	/* Client validation */

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

	{

		client = cl_array[i];

		pPlayer = playerhelpers->GetGamePlayer(client);

		if (!pPlayer)

		{

			return pContext->ThrowNativeError("Client index %d is invalid", client);

		} else if (!pPlayer->IsInGame()) {

			return pContext->ThrowNativeError("Client %d is not connected", client);

		}

	}

	g_TERecFilter.Reset();

	g_TERecFilter.Initialize(cl_array, numClients);

	g_CurrentTE->Send(g_TERecFilter, sp_ctof(params[3]));

	g_CurrentTE = NULL;

	return 1;

}

static cell_t smn_TEIsValidProp(IPluginContext *pContext, const cell_t *params)

{

	if (!g_TEManager.IsAvailable())

	{

		return pContext->ThrowNativeError("TempEntity System unsupported or not available, file a bug report");

	}

	if (!g_CurrentTE)

	{

		return pContext->ThrowNativeError("No TempEntity call is in progress");

	}

	char *prop;

	pContext->LocalToString(params[1], &prop);

	return g_CurrentTE->IsValidProp(prop) ? 1 : 0;

}

static cell_t smn_AddTempEntHook(IPluginContext *pContext, const cell_t *params)

{

	char *name;

	IPluginFunction *pFunc;

	if (!g_TEManager.IsAvailable())

	{

		return pContext->ThrowNativeError("TempEntity System unsupported or not available, file a bug report");

	}

	pContext->LocalToString(params[1], &name);

	pFunc = pContext->GetFunctionById(params[2]);

	if (!pFunc)

	{

		return pContext->ThrowNativeError("Invalid function id (%X)", params[2]);

	}

	if (!s_TempEntHooks.AddHook(name, pFunc))

	{

		return pContext->ThrowNativeError("Invalid TempEntity name: \"%s\"", name);

	}

	return 1;

}

static cell_t smn_RemoveTempEntHook(IPluginContext *pContext, const cell_t *params)

{

	char *name;

	IPluginFunction *pFunc;

	if (!g_TEManager.IsAvailable())

	{

		return pContext->ThrowNativeError("TempEntity System unsupported or not available, file a bug report");

	}

	pContext->LocalToString(params[1], &name);

	pFunc = pContext->GetFunctionById(params[2]);

	if (!pFunc)

	{

		return pContext->ThrowNativeError("Invalid function id (%X)", params[2]);

	}

	if (!s_TempEntHooks.RemoveHook(name, pFunc))

	{

		return pContext->ThrowNativeError("Invalid hooked TempEntity name or function");

	}

	return 1;

}

sp_nativeinfo_t g_TENatives[] = 

{

	{"TE_Start",				smn_TEStart},

	{"TE_WriteNum",				smn_TEWriteNum},

	{"TE_ReadNum",				smn_TEReadNum},

	{"TE_WriteFloat",			smn_TE_WriteFloat},

	{"TE_ReadFloat",			smn_TE_ReadFloat},

	{"TE_WriteVector",			smn_TEWriteVector},

	{"TE_ReadVector",			smn_TEReadVector},

	{"TE_WriteAngles",			smn_TEWriteVector},

	{"TE_Send",					smn_TESend},

	{"TE_IsValidProp",			smn_TEIsValidProp},

	{"TE_WriteFloatArray",		smn_TEWriteFloatArray},

	{"AddTempEntHook",			smn_AddTempEntHook},

	{"RemoveTempEntHook",		smn_RemoveTempEntHook},

	{NULL,						NULL}

};