/**

 * 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 <time.h>

#include <string.h>

#include "sm_stringutil.h"

#include "sm_globals.h"

#include "sourcemod.h"

#include "PluginSys.h"

#include "HandleSys.h"

#include "LibrarySys.h"

#if defined PLATFORM_WINDOWS

#include <windows.h>

#elif defined PLATFORM_LINUX

#include <limits.h>

#include <unistd.h>

#include <sys/times.h>

#endif

HandleType_t g_PlIter;

class CoreNativeHelpers : 

	public SMGlobalClass,

	public IHandleTypeDispatch

{

public:

	void OnSourceModAllInitialized()

	{

		HandleAccess hacc;

		g_HandleSys.InitAccessDefaults(NULL,  &hacc);

		hacc.access[HandleAccess_Clone] = HANDLE_RESTRICT_IDENTITY|HANDLE_RESTRICT_OWNER;

		g_PlIter = g_HandleSys.CreateType("PluginIterator", this, 0, NULL, NULL, g_pCoreIdent, NULL);

	}

	void OnHandleDestroy(HandleType_t type, void *object)

	{

		IPluginIterator *iter = (IPluginIterator *)object;

		iter->Release();

	}

	void OnSourceModShutdown()

	{

		g_HandleSys.RemoveType(g_PlIter, g_pCoreIdent);

	}

} g_CoreNativeHelpers;

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

{

	char buffer[512];

	g_SourceMod.SetGlobalTarget(LANG_SERVER);

	g_SourceMod.FormatString(buffer, sizeof(buffer), pContext, params, 1);

	if (pContext->GetContext()->n_err == SP_ERROR_NONE)

	{

		pContext->ThrowNativeErrorEx(SP_ERROR_ABORTED, "%s", buffer);

	}

	return 0;

}

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

{

	time_t t = time(NULL);

	cell_t *addr;

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

	*(time_t *)addr = t;

	return static_cast<cell_t>(t);

}

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

{

	char *format, *buffer;

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

	pContext->LocalToString(params[3], &format);

	time_t t = (params[4] == -1) ? time(NULL) : (time_t)params[4];

	strftime(buffer, params[2], format, localtime(&t));

	return 1;

}

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

{

	IPluginIterator *iter = g_PluginSys.GetPluginIterator();

	Handle_t hndl = g_HandleSys.CreateHandle(g_PlIter, iter, pContext->GetIdentity(), g_pCoreIdent, NULL);

	if (hndl == BAD_HANDLE)

	{

		iter->Release();

	}

	return hndl;

}

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

{

	Handle_t hndl = (Handle_t)params[1];

	HandleError err;

	IPluginIterator *pIter;

	HandleSecurity sec;

	sec.pIdentity = g_pCoreIdent;

	sec.pOwner = pContext->GetIdentity();

	if ((err=g_HandleSys.ReadHandle(hndl, g_PlIter, &sec, (void **)&pIter)) != HandleError_None)

	{

		return pContext->ThrowNativeError("Could not read Handle %x (error %d)", hndl, err);

	}

	return pIter->MorePlugins() ? 1 : 0;

}

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

{

	Handle_t hndl = (Handle_t)params[1];

	HandleError err;

	IPluginIterator *pIter;

	HandleSecurity sec;

	sec.pIdentity = g_pCoreIdent;

	sec.pOwner = pContext->GetIdentity();

	if ((err=g_HandleSys.ReadHandle(hndl, g_PlIter, &sec, (void **)&pIter)) != HandleError_None)

	{

		return pContext->ThrowNativeError("Could not read Handle %x (error %d)", hndl, err);

	}

	CPlugin *pPlugin = (CPlugin *)pIter->GetPlugin();

	if (!pPlugin)

	{

		return BAD_HANDLE;

	}

	pIter->NextPlugin();

	return pPlugin->GetMyHandle();

}

CPlugin *GetPluginFromHandle(IPluginContext *pContext, Handle_t hndl)

{

	if (hndl == BAD_HANDLE)

	{

		return g_PluginSys.GetPluginByCtx(pContext->GetContext());

	} else {

		HandleError err;

		CPlugin *pPlugin = (CPlugin *)g_PluginSys.PluginFromHandle(hndl, &err);

		if (!pPlugin)

		{

			pContext->ThrowNativeError("Could not read Handle %x (error %d)", hndl, err);

		}

		return pPlugin;

	}

}

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

{

	CPlugin *pPlugin = GetPluginFromHandle(pContext, params[1]);

	if (!pPlugin)

	{

		return 0;

	}

	return pPlugin->GetStatus();

}

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

{

	CPlugin *pPlugin = GetPluginFromHandle(pContext, params[1]);

	if (!pPlugin)

	{

		return 0;

	}

	pContext->StringToLocalUTF8(params[2], params[3], pPlugin->GetFilename(), NULL);

	return 1;

}

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

{

	CPlugin *pPlugin = GetPluginFromHandle(pContext, params[1]);

	if (!pPlugin)

	{

		return 0;

	}

	return pPlugin->IsDebugging() ? 1 : 0;

}

/* Local to plugins only */

enum PluginInfo

{

	PlInfo_Name,			/**< Plugin name */

	PlInfo_Author,			/**< Plugin author */

	PlInfo_Description,		/**< Plugin description */

	PlInfo_Version,			/**< Plugin verison */

	PlInfo_URL,				/**< Plugin URL */

};

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

{

	CPlugin *pPlugin = GetPluginFromHandle(pContext, params[1]);

	if (!pPlugin)

	{

		return 0;

	}

	const sm_plugininfo_t *info = pPlugin->GetPublicInfo();

	if (!info)

	{

		return 0;

	}

	const char *str = NULL;

	switch ((PluginInfo)params[2])

	{

	case PlInfo_Name:

		{

			str = info->name;

			break;

		}

	case PlInfo_Author:

		{

			str = info->author;

			break;

		}

	case PlInfo_Description:

		{

			str = info->description;

			break;

		}

	case PlInfo_Version:

		{

			str = info->version;

			break;

		}

	case PlInfo_URL:

		{

			str = info->url;

			break;

		}

	}

	if (!str || str[0] == '\0')

	{

		return 0;

	}

	pContext->StringToLocalUTF8(params[3], params[4], str, NULL);

	return 1;

}

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

{

	char *str;

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

	CPlugin *pPlugin = g_PluginSys.GetPluginByCtx(pContext->GetContext());

	pPlugin->SetErrorState(Plugin_Error, "%s", str);

	return pContext->ThrowNativeErrorEx(SP_ERROR_ABORTED, "%s", str);

}

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

{

#if defined PLATFORM_WINDOWS

	return (cell_t)GetTickCount();

#elif defined PLATFORM_LINUX

	tms tm;

	clock_t ticks = times(&tm);

	long ticks_per_sec = sysconf(_SC_CLK_TCK);

	double fticks = (double)ticks / (double)ticks_per_sec;

	fticks *= 1000.0f;

	if (fticks > INT_MAX)

	{

		double r = (int)(fticks / INT_MAX) * (double)INT_MAX;

		fticks -= r;

	}

	return (cell_t)fticks;

#endif

}

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

{

	CPlugin *plugin = g_PluginSys.GetPluginByCtx(pContext->GetContext());

	char *cfg, *folder;

	pContext->LocalToString(params[2], &cfg);

	pContext->LocalToString(params[3], &folder);

	if (cfg[0] == '\0')

	{

		static char temp_str[255];

		static char temp_file[PLATFORM_MAX_PATH];

		char *ptr;

		g_LibSys.GetFileFromPath(temp_str, sizeof(temp_str), plugin->GetFilename());

		if ((ptr = strstr(temp_str, ".smx")) != NULL)

		{

			*ptr = '\0';

		}

		/* We have the raw filename! */

		UTIL_Format(temp_file, sizeof(temp_file), "plugin.%s", temp_str);

		cfg = temp_file;

	}

	plugin->AddConfig(params[1] ? true : false, cfg, folder);

	return 1;

}

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

{

	char *name;

	uint32_t idx;

	sp_context_t *ctx = pContext->GetContext();

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

	if (pContext->FindNativeByName(name, &idx) != SP_ERROR_NONE)

	{

		/* Oops! This HAS to silently fail! */

		return 0;

	}

	ctx->natives[idx].flags |= SP_NTVFLAG_OPTIONAL;

	return 1;

}

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

{

	char *name;

	CPlugin *pl = g_PluginSys.GetPluginByCtx(pContext->GetContext());

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

	pl->AddLibrary(name);

	return 1;

}

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

{

	char *str;

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

	return g_PluginSys.LibraryExists(str) ? 1 : 0;

}

REGISTER_NATIVES(coreNatives)

{

	{"AutoExecConfig",			AutoExecConfig},

	{"GetPluginFilename",		GetPluginFilename},

	{"GetPluginInfo",			GetPluginInfo},

	{"GetPluginIterator",		GetPluginIterator},

	{"GetPluginStatus",			GetPluginStatus},

	{"GetSysTickCount",			GetSysTickCount},

	{"GetTime",					GetTime},

	{"IsPluginDebugging",		IsPluginDebugging},

	{"MorePlugins",				MorePlugins},

	{"ReadPlugin",				ReadPlugin},

	{"ThrowError",				ThrowError},

	{"SetFailState",			SetFailState},

	{"FormatTime",				FormatTime},

	{"MarkNativeAsOptional",	MarkNativeAsOptional},

	{"RegPluginLibrary",		RegPluginLibrary},

	{"LibraryExists",			LibraryExists},

	{NULL,						NULL},

};