/**

 * 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 "sm_globals.h"

#include "TextParsers.h"

#include "HandleSys.h"

HandleType_t g_TypeSMC = 0;

class ParseInfo : public ITextListener_SMC

{

public:

	ParseInfo()

	{

		parse_start = NULL;

		parse_end = NULL;

		new_section = NULL;

		key_value = NULL;

		end_section = NULL;

		raw_line = NULL;

		handle = 0;

	}

public:

	void ReadSMC_ParseStart()

	{

		if (parse_start)

		{

			cell_t result;

			parse_start->PushCell(handle);

			parse_start->Execute(&result);

		}

	}

	void ReadSMC_ParseEnd(bool halted, bool failed)

	{

		if (parse_end)

		{

			cell_t result;

			parse_end->PushCell(handle);

			parse_end->PushCell(halted ? 1 : 0);

			parse_end->PushCell(failed ? 1 : 0);

			parse_end->Execute(&result);

		}

	}

	SMCParseResult ReadSMC_NewSection(const char *name, bool opt_quotes)

	{

		cell_t result = SMCParse_Continue;

		if (new_section)

		{

			new_section->PushCell(handle);

			new_section->PushString(name);

			new_section->PushCell(opt_quotes ? 1 : 0);

			new_section->Execute(&result);

		}

		return (SMCParseResult)result;

	}

	SMCParseResult ReadSMC_KeyValue(const char *key, const char *value, bool key_quotes, bool value_quotes)

	{

		cell_t result = SMCParse_Continue;

		if (key_value)

		{

			key_value->PushCell(handle);

			key_value->PushString(key);

			key_value->PushString(value);

			key_value->PushCell(key_quotes ? 1 : 0);

			key_value->PushCell(value_quotes ? 1 : 0);

			key_value->Execute(&result);

		}

		return (SMCParseResult)result;

	}

	SMCParseResult ReadSMC_LeavingSection()

	{

		cell_t result = SMCParse_Continue;

		if (end_section)

		{

			end_section->PushCell(handle);

			end_section->Execute(&result);

		}

		return (SMCParseResult)result;

	}

	SMCParseResult ReadSMC_RawLine(const char *line, unsigned int curline)

	{

		cell_t result = SMCParse_Continue;

		if (raw_line)

		{

			raw_line->PushCell(handle);

			raw_line->PushString(line);

			raw_line->PushCell(curline);

			raw_line->Execute(&result);

		}

		return (SMCParseResult)result;

	}

public:

	IPluginFunction *parse_start;

	IPluginFunction *parse_end;

	IPluginFunction *new_section;

	IPluginFunction *key_value;

	IPluginFunction *end_section;

	IPluginFunction *raw_line;

	Handle_t handle;

};

class TextParseGlobals : 

	public SMGlobalClass,

	public IHandleTypeDispatch

{

public:

	void OnSourceModAllInitialized()

	{

		HandleAccess sec;

		/* These cannot be cloned, because they are locked to a specific plugin.

		 * However, we let anyone read them because we don't care.

		 */

		g_HandleSys.InitAccessDefaults(NULL, &sec);

		sec.access[HandleAccess_Clone] = HANDLE_RESTRICT_IDENTITY;

		sec.access[HandleAccess_Read] = 0;

		g_TypeSMC = g_HandleSys.CreateType("SMCParser", this, 0, NULL, &sec, g_pCoreIdent, NULL);

	}

	void OnSourceModShutdown()

	{

		g_HandleSys.RemoveType(g_TypeSMC, g_pCoreIdent);

	}

	void OnHandleDestroy(HandleType_t type, void *object)

	{

		ParseInfo *parse = (ParseInfo *)object;

		delete parse;

	}

};

TextParseGlobals g_TextParseGlobals;

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

{

	ParseInfo *pInfo = new ParseInfo();

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

	/* Should never happen */

	if (!hndl)

	{

		delete pInfo;

		return 0;

	}

	pInfo->handle = hndl;

	return hndl;

}

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

{

	Handle_t hndl = (Handle_t)params[1];

	HandleError err;

	ParseInfo *parse;

	if ((err=g_HandleSys.ReadHandle(hndl, g_TypeSMC, NULL, (void **)&parse))

		!= HandleError_None)

	{

		return pContext->ThrowNativeError("Invalid SMC Parse Handle %x (error %d)", hndl, err);

	}

	parse->parse_start = pContext->GetFunctionById((funcid_t)params[2]);

	return 1;

}

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

{

	Handle_t hndl = (Handle_t)params[1];

	HandleError err;

	ParseInfo *parse;

	if ((err=g_HandleSys.ReadHandle(hndl, g_TypeSMC, NULL, (void **)&parse))

		!= HandleError_None)

	{

		return pContext->ThrowNativeError("Invalid SMC Parse Handle %x (error %d)", hndl, err);

	}

	parse->parse_end = pContext->GetFunctionById((funcid_t)params[2]);

	return 1;

}

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

{

	Handle_t hndl = (Handle_t)params[1];

	HandleError err;

	ParseInfo *parse;

	if ((err=g_HandleSys.ReadHandle(hndl, g_TypeSMC, NULL, (void **)&parse))

		!= HandleError_None)

	{

		return pContext->ThrowNativeError("Invalid SMC Parse Handle %x (error %d)", hndl, err);

	}

	parse->new_section = pContext->GetFunctionById((funcid_t)params[2]);

	parse->key_value = pContext->GetFunctionById((funcid_t)params[3]);

	parse->end_section = pContext->GetFunctionById((funcid_t)params[4]);

	return 1;

}

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

{

	Handle_t hndl = (Handle_t)params[1];

	HandleError err;

	ParseInfo *parse;

	if ((err=g_HandleSys.ReadHandle(hndl, g_TypeSMC, NULL, (void **)&parse))

		!= HandleError_None)

	{

		return pContext->ThrowNativeError("Invalid SMC Parse Handle %x (error %d)", hndl, err);

	}

	parse->raw_line = pContext->GetFunctionById((funcid_t)params[2]);

	return 1;

}

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

{

	Handle_t hndl = (Handle_t)params[1];

	HandleError err;

	ParseInfo *parse;

	if ((err=g_HandleSys.ReadHandle(hndl, g_TypeSMC, NULL, (void **)&parse))

		!= HandleError_None)

	{

		return pContext->ThrowNativeError("Invalid SMC Parse Handle %x (error %d)", hndl, err);

	}

	char *file;

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

	char path[PLATFORM_MAX_PATH];

	g_SourceMod.BuildPath(Path_Game, path, sizeof(path), "%s", file);

	unsigned int line = 0, col = 0;

	SMCParseError p_err = g_TextParser.ParseFile_SMC(path, parse, &line, &col);

	cell_t *c_line, *c_col;

	pContext->LocalToPhysAddr(params[3], &c_line);

	pContext->LocalToPhysAddr(params[4], &c_col);

	*c_line = line;

	*c_col = col;

	return (cell_t)p_err;

}

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

{

	const char *str = g_TextParser.GetSMCErrorString((SMCParseError)params[1]);

	if (!str)

	{

		return 0;

	}

	pContext->StringToLocal(params[2], params[3], str);

	return 1;

}

REGISTER_NATIVES(textNatives)

{

	{"SMC_CreateParser",			SMC_CreateParser},

	{"SMC_ParseFile",				SMC_ParseFile},

	{"SMC_GetErrorString",			SMC_GetErrorString},

	{"SMC_SetParseStart",			SMC_SetParseStart},

	{"SMC_SetParseEnd",				SMC_SetParseEnd},

	{"SMC_SetReaders",				SMC_SetReaders},

	{"SMC_SetRawLine",				SMC_SetRawLine},

	{NULL,							NULL},

};