/**

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

  * 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 <stdarg.h>

 #include <stdlib.h>

 #include <ctype.h>

 #include "Translator.h"

 #include "Logger.h"

 #include "TextParsers.h"

 #include "LibrarySys.h"

 #include "sm_stringutil.h"

 #include "sourcemod.h"

 Translator g_Translator;

 CPhraseFile *g_pCorePhrases = NULL;

 struct trans_t

 {

 	int stridx;

 	int fmt_order;

 };

 struct phrase_t

 {

 	int fmt_list;

 	unsigned int fmt_count;

 	unsigned int fmt_bytes;

 	int trans_tbl;

 	unsigned int translations;

 };

 CPhraseFile::CPhraseFile(Translator *pTranslator, const char *file)

 {

 	m_pStringTab = pTranslator->GetStringTable();

 	m_pMemory = m_pStringTab->GetMemTable();

 	m_LangCount = pTranslator->GetLanguageCount();

 	m_File.assign(file);

 	m_pTranslator = pTranslator;

 	m_pPhraseLookup = NULL;

 }

 CPhraseFile::~CPhraseFile()

 {

 	if (m_pPhraseLookup)

 	{

 		sm_trie_destroy(m_pPhraseLookup);

 	}

 }

 void CPhraseFile::ParseError(const char *message, ...)

 {

 	char buffer[1024];

 	va_list ap;

 	va_start(ap, message);

 	vsnprintf(buffer, sizeof(buffer), message, ap);

 	va_end(ap);

 	m_ParseError.assign(buffer);

 }

 void CPhraseFile::ParseWarning(const char *message, ...)

 {

 	char buffer[1024];

 	va_list ap;

 	va_start(ap, message);

 	vsnprintf(buffer, sizeof(buffer), message, ap);

 	va_end(ap);

 	if (!m_FileLogged)

 	{

 		g_Logger.LogError("[SM] Warning(s) encountered in translation file \"%s\"", m_File.c_str());

 		m_FileLogged = true;

 	}

 	g_Logger.LogError("[SM] %s", message);

 }

 void CPhraseFile::ReparseFile()

 {

 	if (m_pPhraseLookup)

 	{

 		sm_trie_destroy(m_pPhraseLookup);

 	}

 	m_pPhraseLookup = sm_trie_create();

 	m_LangCount = m_pTranslator->GetLanguageCount();

 	if (!m_LangCount)

 	{

 		return;

 	}

 	SMCParseError err;

 	char path[PLATFORM_MAX_PATH];

 	g_SourceMod.BuildPath(Path_SM, path, PLATFORM_MAX_PATH, "translations/%s", m_File.c_str());

 	unsigned int line=0, col=0;

 	if ((err=g_TextParser.ParseFile_SMC(path, this, &line, &col)) != SMCParse_Okay)

 	{

 		const char *msg = g_TextParser.GetSMCErrorString(err);

 		if (!msg)

 		{

 			msg = m_ParseError.c_str();

 		}

 		g_Logger.LogError("[SM] Fatal error encountered parsing translation file \"%s\"", m_File.c_str());

 		g_Logger.LogError("[SM] Error (line %d, column %d): %s", line, col, msg);

 	}

 }

 void CPhraseFile::ReadSMC_ParseStart()

 {

 	m_CurPhrase = -1;

 	m_ParseState = PPS_None;

 	m_CurLine = 0;

 	m_FileLogged = false;

 	m_LastPhraseString.clear();

 }

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

 {

 	m_CurLine = curline;

 	return SMCParse_Continue;

 }

 SMCParseResult CPhraseFile::ReadSMC_NewSection(const char *name, bool opt_quotes)

 {

 	bool recognized = false;

 	if (m_ParseState == PPS_None)

 	{

 		if (strcmp(name, "Phrases") == 0)

 		{

 			m_ParseState = PPS_Phrases;

 			recognized = true;

 		}

 	} else if (m_ParseState == PPS_Phrases) {

 		m_ParseState = PPS_InPhrase;

 		recognized = true;

 		phrase_t *pPhrase;

 		m_CurPhrase = m_pMemory->CreateMem(sizeof(phrase_t), (void **)&pPhrase);

 		/* Create the reverse lookup */

 		if (!sm_trie_insert(m_pPhraseLookup, name, reinterpret_cast<void *>(m_CurPhrase)))

 		{

 			ParseWarning("Skipping duplicate phrase \"%s\" on line %d.", name, m_CurLine);

 			/* :IDEA: prevent memory waste by seeking backwards in memtable? */

 			m_CurPhrase = -1;

 		} else {

 			/* Initialize new phrase */

 			trans_t *pTrans;

 			pPhrase->fmt_count = 0;

 			pPhrase->fmt_list = -1;

 			pPhrase->trans_tbl = m_pMemory->CreateMem(sizeof(trans_t) * m_LangCount, (void **)&pTrans);

 			pPhrase->translations = 0;

 			pPhrase->fmt_bytes = 0;

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

 			{

 				pTrans[i].stridx = -1;

 			}

 			m_LastPhraseString.assign(name);

 		}

 	} else if (m_ParseState == PPS_InPhrase) {

 		ParseError("Phrase sections may not have sub-sections");

 		return SMCParse_HaltFail;

 	}

 	if (!recognized)

 	{

 		ParseWarning("Ignoring invalid section \"%s\" on line %d.", name, m_CurLine);

 	}

 	return SMCParse_Continue;

 }

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

 {

 	/* See if we are ignoring a phrase */

 	if (!m_CurPhrase)

 	{

 		return SMCParse_Continue;

 	}

 	phrase_t *pPhrase = (phrase_t *)m_pMemory->GetAddress(m_CurPhrase);

 	if (key[0] == '#' && strcmp(key, "#format") == 0)

 	{

 		if (pPhrase->fmt_list != -1)

 		{

 			ParseWarning("Ignoring duplicated #format property on line %d", m_CurLine);

 			return SMCParse_Continue;

 		}

 		if (pPhrase->translations > 0)

 		{

 			ParseWarning("#format property should come before translations on line %d, ignoring", m_CurLine);

 			return SMCParse_Continue;

 		}

 		/* Do an initial browsing for error checking and what not */

 		enum ParseStates

 		{

 			Parse_None,

 			Parse_Index,

 			Parse_Format,

 		};

 		ParseStates state = Parse_None;

 		const char *old_value = value;

 		while (*value != '\0')

 		{

 			if (state == Parse_None)

 			{

 				if (*value == '{')

 				{

 					pPhrase->fmt_count++;

 					state = Parse_Index;

 				} else if (*value == ',') {

 					/* Do nothing */

 				} else {

 					unsigned int bytes = g_TextParser.GetUTF8CharBytes(value);

 					if (bytes != 1 || !isalpha(*value))

 					{

 						ParseWarning("Invalid token '%c' in #format property on line %d.", *value, m_CurLine);

 					}

 				}

 			} else if (state == Parse_Index) {

 				if (*value == ':')

 				{

 					state = Parse_Format;

 					if (value - old_value >= 15)

 					{

 						ParseWarning("Too many digits in format index on line %d, phrase will be ignored.", m_CurLine);

 						m_CurPhrase = -1;

 						return SMCParse_Continue;

 					}

 				} else {

 					unsigned int bytes = g_TextParser.GetUTF8CharBytes(value);

 					if (bytes != 1 || !isdigit(*value))

 					{

 						ParseWarning("Token '%c' in #format property on line %d is not a digit, phrase will be ignored.",

 									*value,

 									m_CurLine);

 						m_CurPhrase = -1;

 						return SMCParse_Continue;

 					}

 				}

 			} else if (state == Parse_Format) {

 				if (*value == '}')

 				{

 					state = Parse_None;

 				}

 			}

 			value++;

 		}

 		if (state != Parse_None)

 		{

 			/* Moose clam cow. */

 			ParseWarning("Unterminated format string on line %d, phrase will be ignored.", m_CurLine);

 			m_CurPhrase = -1;

 			return SMCParse_Continue;

 		}

 		value = old_value;

 		/* Allocate the format table */

 		char fmt_buf[16];

 		int *fmt_list;

 		pPhrase->fmt_list = m_pMemory->CreateMem(sizeof(int) * pPhrase->fmt_count, (void **)&fmt_list);

 		/* Initialize */

 		for (size_t i=0; i<pPhrase->fmt_count; i++)

 		{

 			fmt_list[i] = -1;

 		}

 		/* Now we need to read again... this time into the format buffer */

 		const char *in_ptr = value;

 		const char *idx_ptr = NULL;

 		char *out_ptr = NULL;

 		unsigned int cur_idx = 0;

 		state = Parse_None;

 		while (*in_ptr != '\0')

 		{

 			if (state == Parse_None)

 			{

 				if (*in_ptr == '{')

 				{

 					state = Parse_Index;

 					idx_ptr = NULL;

 				}

 			} else if (state == Parse_Index) {

 				if (*in_ptr == ':')

 				{

 					/* Check the number! */

 					if (!idx_ptr)

 					{

 						ParseWarning("Format property contains unindexed format string on line %d, phrase will be ignored.", m_CurLine);

 						m_CurPhrase = -1;

 						return SMCParse_Continue;

 					}

 					long idx = strtol(idx_ptr, NULL, 10);

 					if (idx < 1 || idx > (long)pPhrase->fmt_count)

 					{

 						ParseWarning("Format property contains invalid index '%d' on line %d, phrase will be ignored.", idx, m_CurLine);

 						m_CurPhrase = -1;

 						return SMCParse_Continue;

 					} else if (fmt_list[idx - 1] != -1) {

 						ParseWarning("Format property contains duplicated index '%d' on line %d, phrase will be ignored.", idx, m_CurLine);

 						m_CurPhrase = -1;

 						return SMCParse_Continue;

 					}

 					cur_idx = (unsigned int)idx;

 					state = Parse_Format;

 					out_ptr = NULL;

 				} else if (!idx_ptr) {

 					idx_ptr = in_ptr;

 				}

 			} else if (state == Parse_Format) {

 				if (*in_ptr == '}')

 				{

 					if (!out_ptr)

 					{

 						ParseWarning("Format property contains empty format string on line %d, phrase will be ignored.", m_CurLine);

 						m_CurPhrase = -1;

 						return SMCParse_Continue;

 					}

 					*out_ptr = '\0';

 					state = Parse_None;

 					/* Now, add this to our table */

 					fmt_list[cur_idx - 1] = m_pStringTab->AddString(fmt_buf);

 					pPhrase->fmt_bytes += strlen(fmt_buf);

 				} else {

 					if (!out_ptr)

 					{

 						out_ptr = fmt_buf;

 						*out_ptr++ = '%';

 					}

 					/* Check length ... */

 					if ((unsigned)(out_ptr - fmt_buf) >= sizeof(fmt_buf) - 1)

 					{

 						ParseWarning("Format property contains format string that exceeds maximum length on line %d, phrase will be ignored.",

 									 m_CurLine);

 						m_CurPhrase = -1;

 						return SMCParse_Continue;

 					}

 					*out_ptr++ = *in_ptr;

 				}

 			}

 			in_ptr++;

 		}

 		/* If we've gotten here, we only accepted unique indexes in a range.

 		 * Therefore, the list has to be completely filled.  Double check anyway.

 		 */

 		for (size_t i=0; i<pPhrase->fmt_count; i++)

 		{

 			if (fmt_list[i] == -1)

 			{

 				ParseWarning("Format property contains no string for index %d on line %d, phrase will be ignored.",

 							 i + 1,

 							 m_CurLine);

 				m_CurPhrase = -1;

 				return SMCParse_Continue;

 			}

 		}

 	} else {

 		size_t len = strlen(key);

 		if (len != 2)

 		{

 			ParseWarning("Ignoring translation to invalid language \"%s\" on line %d.", key, m_CurLine);

 			return SMCParse_Continue;

 		}

 		unsigned int lang;

 		if (!m_pTranslator->GetLanguageByCode(key, &lang))

 		{

 			/* Ignore if we don't have a language.

 			 * :IDEA: issue a one-time alert?

 			 */

 			return SMCParse_Continue;

 		}

 		/* See how many bytes we need for this string, then allocate.

 		 * NOTE: THIS SHOULD GUARANTEE THAT WE DO NOT NEED TO NEED TO SIZE CHECK 

 		 */

 		len = strlen(value) + pPhrase->fmt_bytes + 1;

 		char *out_buf;

 		int out_idx;

 		out_idx = m_pMemory->CreateMem(len, (void **)&out_buf);

 		int *fmt_order;

 		int *fmt_list = (int *)m_pMemory->GetAddress(pPhrase->fmt_list);

 		trans_t *pTrans = (trans_t *)m_pMemory->GetAddress(pPhrase->trans_tbl);

 		pTrans = &pTrans[lang];

 		pTrans->stridx = out_idx;

 		bool params[MAX_TRANSLATE_PARAMS];

 		/* Build the format order list, if necessary */

 		if (fmt_list)

 		{

 			pTrans->fmt_order = m_pMemory->CreateMem(pPhrase->fmt_count * sizeof(int), (void **)&fmt_order);

 			for (unsigned int i=0; i<pPhrase->fmt_count; i++)

 			{

 				fmt_order[i] = -1;

 			}

 			memset(&params[0], 0, sizeof(params));

 		}

 		const char *in_ptr = value;

 		char *out_ptr = out_buf;

 		unsigned int order_idx = 0;

 		while (*in_ptr != '\0')

 		{

 			if (*in_ptr == '\\')

 			{

 				switch (*(in_ptr + 1))

 				{

 				case '\n':

 					*out_ptr++ = '\n';

 					break;

 				case '\t':

 					*out_ptr++ = '\t';

 					break;

 				case '\r':

 					*out_ptr++ = '\r';

 					break;

 				case '{':

 					*out_ptr++ = '{';

 					break;

 				default:

 					/* Copy both bytes since we don't know what's going on */

 					*out_ptr++ = *in_ptr++;

 					*out_ptr++ = *in_ptr;

 					break;

 				}

 				/* Skip past the last byte read */

 				in_ptr++;

 			} else if (*in_ptr == '{' && fmt_list != NULL) {

 				/* Search for parameters if this is a formatted string */

 				const char *scrap_in_point = in_ptr;

 				const char *digit_start = ++in_ptr;

 				unsigned int bytes;

 				while (*in_ptr != '\0')

 				{

 					bytes = g_TextParser.GetUTF8CharBytes(in_ptr);

 					if (bytes != 1)

 					{

 						goto scrap_point;

 					}

 					if (*in_ptr == '}')

 					{

 						/* Did we get an index? */

 						if (in_ptr == digit_start)

 						{

 							goto scrap_point;

 						}

 						/* Is it valid? */

 						long idx = strtol(digit_start, NULL, 10);

 						if (idx < 1 || idx > (int)pPhrase->fmt_count)

 						{

 							goto scrap_point;

 						}

 						if (params[idx-1])

 						{

 							goto scrap_point;

 						}

 						/* We're safe to insert the string.  First mark order. */

 						fmt_order[order_idx++] = (int)idx - 1;

 						/* Now concatenate */

 						out_ptr += sprintf(out_ptr, "%s", m_pStringTab->GetString(fmt_list[idx-1]));

 						/* Mark as used */

 						params[idx-1] = true;

 						goto cont_loop;

 					}

 					in_ptr++;

 				}

 scrap_point:

 				/* Pretend none of this ever happened.  Move along now! */

 				in_ptr = scrap_in_point;

 				*out_ptr++ = *in_ptr;

 			} else {

 				*out_ptr++ = *in_ptr;

 			}

 cont_loop:

 			in_ptr++;

 		}

 		*out_ptr = '\0';

 		pPhrase->translations++;

 	}

 	return SMCParse_Continue;

 }

 SMCParseResult CPhraseFile::ReadSMC_LeavingSection()

 {

 	if (m_ParseState == PPS_InPhrase)

 	{

 		if (m_CurPhrase == -1 && m_LastPhraseString.size())

 		{

 			sm_trie_delete(m_pPhraseLookup, m_LastPhraseString.c_str());

 		}

 		m_CurPhrase = -1;

 		m_ParseState = PPS_Phrases;

 		m_LastPhraseString.assign("");

 	} else if (m_ParseState == PPS_Phrases) {

 		m_ParseState = PPS_None;

 	}

 	return SMCParse_Continue;

 }

 void CPhraseFile::ReadSMC_ParseEnd(bool halted, bool failed)

 {

 	/* Check to see if we have any dangling phrases that weren't completed, and scrap them */

 	if ((halted || failed) && m_LastPhraseString.size())

 	{

 		sm_trie_delete(m_pPhraseLookup, m_LastPhraseString.c_str());

 	}

 }

 TransError CPhraseFile::GetTranslation(const char *szPhrase, unsigned int lang_id, Translation *pTrans)

 {

 	if (lang_id >= m_LangCount)

 	{

 		return Trans_BadLanguage;

 	}

 	void *object;

 	if (!sm_trie_retrieve(m_pPhraseLookup, szPhrase, &object))

 	{

 		return Trans_BadPhrase;

 	}

 	phrase_t *pPhrase = (phrase_t *)m_pMemory->GetAddress(reinterpret_cast<int>(object));

 	trans_t *trans = (trans_t *)m_pMemory->GetAddress(pPhrase->trans_tbl);

 	trans = &trans[lang_id];

 	if (trans->stridx == -1)

 	{

 		return Trans_BadPhraseLanguage;

 	}

 	pTrans->fmt_order = (int *)m_pMemory->GetAddress(trans->fmt_order);

 	pTrans->fmt_count = pPhrase->fmt_count;

 	pTrans->szPhrase = m_pStringTab->GetString(trans->stridx);

 	return Trans_Okay;

 }

 const char *CPhraseFile::GetFilename()

 {

 	return m_File.c_str();

 }

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

  ** MAIN TRANSLATOR CODE **

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

 Translator::Translator()

 {

 	m_pStringTab = new BaseStringTable(2048);

 	m_pLCodeLookup = sm_trie_create();

 }

 Translator::~Translator()

 {

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

 	{

 		delete m_Files[i];

 	}

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

 	{

 		delete m_Languages[i];

 	}

 	sm_trie_destroy(m_pLCodeLookup);

 	delete m_pStringTab;

 }

 void Translator::OnSourceModAllInitialized()

 {

 	AddLanguage("en", "English");

 	unsigned int id = FindOrAddPhraseFile("core.cfg");

 	g_pCorePhrases = GetFileByIndex(id);

 }

 bool Translator::GetLanguageByCode(const char *code, unsigned int *index)

 {

 	void *_index;

 	if (!sm_trie_retrieve(m_pLCodeLookup, code, &_index))

 	{

 		return false;

 	}

 	if (index)

 	{

 		*index = reinterpret_cast<unsigned int>(_index);

 	}

 	return true;

 }

 unsigned int Translator::GetLanguageCount()

 {

 	return (unsigned int)m_Languages.size();

 }

 BaseStringTable *Translator::GetStringTable()

 {

 	return m_pStringTab;

 }

 unsigned int Translator::FindOrAddPhraseFile(const char *phrase_file)

 {

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

 	{

 		if (strcmp(m_Files[i]->GetFilename(), phrase_file) == 0)

 		{

 			return (unsigned int)i;

 		}

 	}

 	CPhraseFile *pFile = new CPhraseFile(this, phrase_file);

 	unsigned int idx = (unsigned int)m_Files.size();

 	m_Files.push_back(pFile);

 	pFile->ReparseFile();

 	return idx;

 }

 void Translator::RebuildLanguageDatabase(const char *lang_header_file)

 {

 	/* Erase everything we have */

 	sm_trie_destroy(m_pLCodeLookup);

 	m_pLCodeLookup = sm_trie_create();

 	m_pStringTab->Reset();

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

 	{

 		delete m_Languages[i];

 	}

 	m_Languages.clear();

 	/* Start anew */

 	SMCParseError err;

 	unsigned int line=0, col=0;

 	if ((err=g_TextParser.ParseFile_SMC(lang_header_file, this, &line, &col)) != SMCParse_Okay)

 	{

 		const char *str_err = g_TextParser.GetSMCErrorString(err);

 		if (!str_err)

 		{

 			str_err = m_CustomError.c_str();

 		}

 		g_Logger.LogError("[SM] Failed to parse language header file: \"%s\"", lang_header_file);

 		g_Logger.LogError("[SM] Parse error (line %d, column %d): %s", line, col, str_err);

 	}

 	if (!m_Languages.size())

 	{

 		g_Logger.LogError("[SM] Fatal error, no languages found! Translation will not work.");

 	}

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

 	{

 		m_Files[i]->ReparseFile();

 	}

 }

 void Translator::ReadSMC_ParseStart()

 {

 	m_InLanguageSection = false;

 	m_CustomError.clear();

 }

 SMCParseResult Translator::ReadSMC_NewSection(const char *name, bool opt_quotes)

 {

 	if (!m_InLanguageSection)

 	{

 		if (strcmp(name, "Languages") == 0)

 		{

 			m_InLanguageSection = true;

 		}

 	}

 	if (!m_InLanguageSection)

 	{

 		g_Logger.LogError("[SM] Warning: Unrecognized section \"%s\" in languages.cfg", name);

 	}

 	return SMCParse_Continue;

 }

 SMCParseResult Translator::ReadSMC_LeavingSection()

 {

 	m_InLanguageSection = false;

 	return SMCParse_Continue;

 }

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

 {

 	size_t len = strlen(key);

 	if (len != 2)

 	{

 		g_Logger.LogError("[SM] Warning encountered parsing languages.cfg file.");

 		g_Logger.LogError("[SM] Invalid language code \"%s\" is being ignored.", key);

 	}

 	AddLanguage(key, value);

 	return SMCParse_Continue;

 }

 bool Translator::AddLanguage(const char *langcode, const char *description)

 {

 	if (sm_trie_retrieve(m_pLCodeLookup, langcode, NULL))

 	{

 		return false;

 	}

 	Language *pLanguage = new Language;

 	unsigned int idx = m_Languages.size();

 	pLanguage->m_code2[0] = langcode[0];

 	pLanguage->m_code2[1] = langcode[1];

 	pLanguage->m_code2[2] = langcode[2];

 	pLanguage->m_FullName = m_pStringTab->AddString(description);

 	sm_trie_insert(m_pLCodeLookup, langcode, reinterpret_cast<void *>(idx));

 	m_Languages.push_back(pLanguage);

 	return true;

 }

 CPhraseFile *Translator::GetFileByIndex(unsigned int index)

 {

 	if (index >= m_Files.size())

 	{

 		return NULL;

 	}

 	return m_Files[index];

 }

 size_t Translator::Translate(char *buffer, size_t maxlength, void **params, const Translation *pTrans)

 {

 	void *new_params[MAX_TRANSLATE_PARAMS];

 	/* Rewrite the parameter order */

 	for (unsigned int i=0; i<pTrans->fmt_count; i++)

 	{

 		new_params[i] = params[pTrans->fmt_order[i]];

 	}

 	return gnprintf(buffer, maxlength, pTrans->szPhrase, new_params);

 }

 TransError Translator::CoreTrans(int client, 

 								  char *buffer, 

 								  size_t maxlength, 

 								  const char *phrase, 

 								  void **params, 

 								  size_t *outlen)

 {

 	/* :TODO: do language stuff here */

 	if (!g_pCorePhrases)

 	{

 		return Trans_BadPhraseFile;

 	}

 	Translation trans;

 	TransError err;

 	if ((err=g_pCorePhrases->GetTranslation(phrase, 0, &trans)) != Trans_Okay)

 	{

 		return err;

 	}

 	size_t len = Translate(buffer, maxlength, params, &trans);

 	if (outlen)

 	{

 		*outlen = len;

 	}

 	return Trans_Okay;

 }