/**

 * vim: set ts=4 :

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

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

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

 *

 * This file is not open source and may not be copied without explicit

 * written permission of AlliedModders LLC.  This file may not be redistributed 

 * in whole or significant part.

 * For information, see LICENSE.txt or http://www.sourcemod.net/license.php

 *

 * Version: $Id$

 */

#include <time.h>

#include "sm_globals.h"

#include "sourcemod.h"

#include "PluginSys.h"

#include "HandleSys.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.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 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

}

REGISTER_NATIVES(coreNatives)

{

	{"GetPluginFilename",	GetPluginFilename},

	{"GetPluginInfo",		GetPluginInfo},

	{"GetPluginIterator",	GetPluginIterator},

	{"GetPluginStatus",		GetPluginStatus},

	{"GetSysTickCount",		GetSysTickCount},

	{"GetTime",				GetTime},

	{"IsPluginDebugging",	IsPluginDebugging},

	{"MorePlugins",			MorePlugins},

	{"ReadPlugin",			ReadPlugin},

	{"ThrowError",			ThrowError},

	{"SetFailState",		SetFailState},

	{NULL,					NULL},

};