/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_tools.hxx"

#include <stdio.h>
#include <string.h>
 
#include <unistd.h>

#include <sys/stat.h>
#include <tools/stream.hxx>
#include "cppdep.hxx"

//#define TEST

CppDep::CppDep( ByteString aFileName )
{
	aSourceFile = aFileName;

	pSearchPath = new ByteStringList;
	pFileList = new ByteStringList;
}

CppDep::CppDep()
{
	pSources = new ByteStringList;
	pSearchPath = new ByteStringList;
	pFileList = new ByteStringList;
}

CppDep::~CppDep()
{
	delete pSources;
	delete pSearchPath;
	delete pFileList;
}

void CppDep::Execute()
{
	sal_uIntPtr nCount = pSources->Count();
	for ( sal_uIntPtr n=0; n<nCount;n++)
	{
		ByteString *pStr = pSources->GetObject(n);
		Search( *pStr );
	}
}

sal_Bool CppDep::AddSearchPath( const char* aPath )
{
	ByteString *pStr = new ByteString( aPath );
	pSearchPath->Insert( pStr, LIST_APPEND );
	return sal_False;
}

sal_Bool CppDep::AddSource( const char* aSource )
{
	ByteString *pStr = new ByteString( aSource );
	pSources->Insert( pStr, LIST_APPEND );
	return sal_False;
}

sal_Bool CppDep::Search( ByteString aFileName )
{
#ifdef DEBUG_VERBOSE
	fprintf( stderr, "SEARCH : %s\n", aFileName.GetBuffer());
#endif
	sal_Bool bRet = sal_False;

	SvFileStream aFile;
	ByteString aReadLine;

	UniString suFileName( aFileName, gsl_getSystemTextEncoding());

	aFile.Open( suFileName, STREAM_READ );
	while ( aFile.ReadLine( aReadLine ))
	{
		sal_uInt16 nPos = aReadLine.Search( "include" );
		if ( nPos != STRING_NOTFOUND  )
		{
#ifdef DEBUG_VERBOSE
			fprintf( stderr, "found : %d %s\n", nPos, aReadLine.GetBuffer() );
#endif
			ByteString aResult = IsIncludeStatement( aReadLine );
#ifdef DEBUG_VERBOSE
			fprintf( stderr, "Result : %s\n", aResult.GetBuffer() );
#endif

			ByteString aNewFile;
			if ( aResult !="")
			if ( (aNewFile = Exists( aResult )) != "" )
			{
				sal_Bool bFound = sal_False;
				sal_uIntPtr nCount = pFileList->Count();
				for ( sal_uIntPtr i=0; i<nCount; i++ )
				{
					ByteString *pStr = pFileList->GetObject(i);
					if ( *pStr == aNewFile )
						bFound = sal_True;
				}
#ifdef DEBUG_VERBOSE
				fprintf( stderr, "not in list : %d %s\n", nPos, aReadLine.GetBuffer() );
#endif
				if ( !bFound )
				{
					pFileList->Insert( new ByteString( aNewFile ), LIST_APPEND );
#ifdef DEBUG_VERBOSE
					fprintf( stderr, " CppDep %s\\\n", aNewFile.GetBuffer() );
#endif
					Search(aNewFile);
				}
			}
		}
	}
	aFile.Close();

	return bRet;
}

ByteString CppDep::Exists( ByteString aFileName )
{
	char pFullName[1023];
	ByteString aString;

#ifdef DEBUG_VERBOSE
	fprintf( stderr, "Searching %s \n", aFileName.GetBuffer() );
#endif

	sal_uIntPtr nCount = pSearchPath->Count();
	for ( sal_uIntPtr n=0; n<nCount; n++)
	{
		struct stat aBuf;
		ByteString *pPathName = pSearchPath->GetObject(n);

		strcpy( pFullName, pPathName->GetBuffer());
		strcat( pFullName, DIR_SEP );
		strcat( pFullName, aFileName.GetBuffer());

#ifdef DEBUG_VERBOSE
		fprintf( stderr, "looking for %s\t ", pFullName );
#endif
		if ( stat( pFullName, &aBuf ) == 0 )
		{
#ifdef DEBUG_VERBOSE
			fprintf( stderr, "Got Dependency ", pFullName );
#endif
#ifdef DEBUG_VERBOSE
			fprintf( stderr, "%s \\\n", pFullName );
#endif

			return ByteString(pFullName);
		}
	}
	return aString;
}

ByteString CppDep::IsIncludeStatement( ByteString aLine )
{
	ByteString aRetStr;
	if ( aLine.Search("/*",0) != STRING_NOTFOUND )
	{
#ifdef DEBUG_VERBOSE
		fprintf( stderr, "found starting C comment : %s\n", aLine.GetBuffer() );
#endif
		aLine.Erase(aLine.Search("/*",0), aLine.Len() - 1);	
#ifdef DEBUG_VERBOSE
		fprintf( stderr, "cleaned string : %s\n", aLine.GetBuffer() );
#endif
	}
	if ( aLine.Search("//",0) != STRING_NOTFOUND )
	{
#ifdef DEBUG_VERBOSE
		fprintf( stderr, "found C++ comment : %s\n", aLine.GetBuffer() );
#endif
		aLine.Erase(aLine.Search("//",0), aLine.Len() - 1);	
#ifdef DEBUG_VERBOSE
		fprintf( stderr, "cleaned string : %s\n", aLine.GetBuffer() );
#endif
	}
	// WhiteSpacesfressen
	aLine.EraseAllChars(' ');
	aLine.EraseAllChars('\t');
#ifdef DEBUG_VERBOSE
	fprintf( stderr, "now : %s\n", aLine.GetBuffer() );
#endif
	// ist der erste Teil ein #include ?
	ByteString aTmpStr;
	aTmpStr = aLine.Copy( 0, 8 );
#ifdef DEBUG_VERBOSE
	fprintf( stderr, "is include : %s\n", aTmpStr.GetBuffer() );
#endif
	if ( aTmpStr.Equals("#include") )
	{
		aTmpStr = aLine.Erase( 0, 8 );
		sal_uInt16 nLen = aLine.Len();
		aLine.Erase( nLen-1, 1 );
		aLine.Erase( 0, 1 );
#ifdef DEBUG_VERBOSE
		fprintf( stderr, "Gotcha : %s\n", aLine.GetBuffer() );
#endif
		aRetStr = aLine;
	}
	return aRetStr;
}

#ifdef TEST

int main( int argc, char **argv )
{
	CppDep *pDep = new CppDep( "cppdep.cxx" );
	pDep->AddSearchPath(".");
	pDep->AddSearchPath("/usr/include");
	pDep->AddSearchPath("/usr/local/include");
	pDep->AddSearchPath("/usr/include/sys");
	pDep->AddSearchPath("/usr/include/X11");
	pDep->Execute();
	delete pDep;
	return 0;
}

#endif