/*************************************************************************
 *
 *  $RCSfile: bootstrap.cxx,v $
 *
 *  $Revision: 1.8 $
 *
 *  last change: $Author: kr $ $Date: 2001-10-11 12:56:45 $
 *
 *  The Contents of this file are made available subject to the terms of
 *  either of the following licenses
 *
 *         - GNU Lesser General Public License Version 2.1
 *         - Sun Industry Standards Source License Version 1.1
 *
 *  Sun Microsystems Inc., October, 2000
 *
 *  GNU Lesser General Public License Version 2.1
 *  =============================================
 *  Copyright 2000 by Sun Microsystems, Inc.
 *  901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License version 2.1, as published by the Free Software Foundation.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *  MA  02111-1307  USA
 *
 *
 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
 *  The contents of this file are subject to the Sun Industry Standards
 *  Source License Version 1.1 (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.openoffice.org/license.html.
 *
 *  Software provided under this License is provided on an "AS IS" basis,
 *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
 *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
 *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
 *  See the License for the specific provisions governing your rights and
 *  obligations concerning the Software.
 *
 *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
 *
 *  Copyright: 2000 by Sun Microsystems, Inc.
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): _______________________________________
 *
 *
 ************************************************************************/
#include <list>
#include <stdio.h>

#include <osl/process.h>
#include <osl/file.h>
#include <osl/diagnose.h>
#include <osl/mutex.hxx>
#include <osl/file.hxx>

#include <rtl/bootstrap.h>
#include <rtl/ustring.hxx>
#include <rtl/ustrbuf.hxx>
#include <rtl/byteseq.hxx>

#include "macro.hxx"

// I need C++ for static variables and for lists (stl) !
// If we don't want C++, we need another solution for static vars !
using namespace ::rtl;
using namespace ::osl;

struct rtl_bootstrap_NameValue
{
    ::rtl::OUString sName;
    ::rtl::OUString sValue;
};

typedef ::std::list< struct rtl_bootstrap_NameValue > NameValueList;

static sal_Bool getFromCommandLineArgs( rtl_uString **ppValue , rtl_uString *pName )
{
    static NameValueList *pNameValueList = 0;
    if( ! pNameValueList )
    {
        static NameValueList nameValueList;

        sal_Int32 nArgCount = osl_getCommandArgCount();
        for(sal_Int32 i = 0; i < nArgCount; ++ i)
        {
            rtl_uString *pArg = 0;
            osl_getCommandArg( i, &pArg );
            if( ('-' == pArg->buffer[0] || '/' == pArg->buffer[0] ) &&
                'e' == pArg->buffer[1] &&
                'n' == pArg->buffer[2] &&
                'v' == pArg->buffer[3] &&
                ':' == pArg->buffer[4] )
            {
                sal_Int32 nIndex = rtl_ustr_indexOfChar( pArg->buffer, '=' );
                if( nIndex >= 0 )
                {

                    struct rtl_bootstrap_NameValue nameValue;
                    nameValue.sName = OUString( &(pArg->buffer[5]), nIndex - 5  );
                    nameValue.sValue = OUString( &(pArg->buffer[nIndex+1]) );
                    if( i == nArgCount-1 &&
                        nameValue.sValue.getLength() &&
                        nameValue.sValue[nameValue.sValue.getLength()-1] == 13 )
                    {
                        // avoid the 13 linefeed for the last argument,
                        // when the executable is started from a script,
                        // that was edited on windows
                        nameValue.sValue = nameValue.sValue.copy(0,nameValue.sValue.getLength()-1);
                    }
                    nameValueList.push_back( nameValue );
                }
            }
            rtl_uString_release( pArg );
        }
        pNameValueList = &nameValueList;
    }

    sal_Bool found = sal_False;

    OUString name( pName );
    for( NameValueList::iterator ii = pNameValueList->begin() ;
         ii != pNameValueList->end() ;
         ++ii )
    {
        if( (*ii).sName.equals(name) )
        {
            rtl_uString_assign( ppValue, (*ii).sValue.pData );
            found = sal_True;
            break;
        }
    }

    return found;
}

static ::rtl::OUString &getIniFileNameImpl()
{
    static OUString *pStaticName = 0;
    if( ! pStaticName )
    {
        OUString fileName;

        OUString sVarName(RTL_CONSTASCII_USTRINGPARAM("INIFILENAME"));
        if(!getFromCommandLineArgs(&fileName.pData, sVarName.pData))
        {
            osl_getExecutableFile(&fileName.pData);

            // get rid of a potential executable extension
            OUString progExt = OUString::createFromAscii(".bin");
            if(fileName.getLength() > progExt.getLength()
            && fileName.copy(fileName.getLength() - progExt.getLength()).equalsIgnoreAsciiCase(progExt))
                fileName = fileName.copy(0, fileName.getLength() - progExt.getLength());

            progExt = OUString::createFromAscii(".exe");
            if(fileName.getLength() > progExt.getLength()
            && fileName.copy(fileName.getLength() - progExt.getLength()).equalsIgnoreAsciiCase(progExt))
                fileName = fileName.copy(0, fileName.getLength() - progExt.getLength());

            // append config file suffix
            fileName += OUString(RTL_CONSTASCII_USTRINGPARAM(SAL_CONFIGFILE("")));
        }

        static OUString theFileName;
        if(fileName.getLength())
            theFileName = fileName;

        pStaticName = &theFileName;
    }

    return *pStaticName;
}

static void getFileSize( oslFileHandle handle, sal_uInt64 *pSize )
{
    sal_uInt64 nOldPos=0;
    OSL_VERIFY( osl_File_E_None == osl_getFilePos( handle, &nOldPos ) &&
                osl_File_E_None == osl_setFilePos( handle, osl_Pos_End , 0 ) &&
                osl_File_E_None == osl_getFilePos( handle, pSize ) &&
                osl_File_E_None == osl_setFilePos( handle, osl_Pos_Absolut, nOldPos ) );
}

static void getFromEnvironment( rtl_uString **ppValue, rtl_uString *pName )
{
    if( osl_Process_E_None != osl_getEnvironment( pName , ppValue ) )
    {
        // osl behaves different on win or unx.
        if( *ppValue )
        {
            rtl_uString_release( *ppValue );
            *ppValue = 0;
        }
    }

}


static void getFromList(NameValueList *pNameValueList, rtl_uString **ppValue, rtl_uString *pName)
{
    OUString name(pName);

    for(NameValueList::iterator ii = pNameValueList->begin();
        ii != pNameValueList->end();
        ++ii)
    {
        if( (*ii).sName.equals(name) )
        {
            rtl_uString_assign( ppValue, (*ii).sValue.pData );
            break;
        }
    }
}

static sal_Bool getValue(NameValueList *pNameValueList, rtl_uString * pName, rtl_uString ** ppValue, rtl_uString * pDefault)
{
    static const OUString sysUserConfig(RTL_CONSTASCII_USTRINGPARAM("SYSUSERCONFIG"));
    static const OUString sysUserHome  (RTL_CONSTASCII_USTRINGPARAM("SYSUSERHOME"));
    static const OUString sysBinDir    (RTL_CONSTASCII_USTRINGPARAM("SYSBINDIR"));

    sal_Bool result = sal_True;

    // we have build ins:
    if(!rtl_ustr_compare_WithLength(pName->buffer, pName->length, sysUserConfig.pData->buffer, sysUserConfig.pData->length))
    {
        oslSecurity security = osl_getCurrentSecurity();
        osl_getConfigDir(security, ppValue);
        osl_freeSecurityHandle(security);
    }
    else if(!rtl_ustr_compare_WithLength(pName->buffer, pName->length, sysUserHome.pData->buffer, sysUserHome.pData->length))
    {
        oslSecurity security = osl_getCurrentSecurity();
        osl_getHomeDir(security, ppValue);
        osl_freeSecurityHandle(security);
    }
    else if(!rtl_ustr_compare_WithLength(pName->buffer, pName->length, sysBinDir.pData->buffer, sysBinDir.pData->length))
        osl_getProcessWorkingDir(ppValue);

    else
    {
        getFromCommandLineArgs(ppValue, pName);
        if(!*ppValue)
        {
            getFromList(pNameValueList, ppValue, pName);
            if( ! *ppValue )
            {
                getFromEnvironment( ppValue, pName );
                if( ! *ppValue )
                {
                    result = sal_False;

                    if(pDefault)
                        rtl_uString_assign( ppValue , pDefault );
                }
            }
        }
    }

#ifdef DEBUG
    OString sName = OUStringToOString(OUString(pName), RTL_TEXTENCODING_ASCII_US);
    OString sValue;
    if(*ppValue)
        sValue = OUStringToOString(OUString(*ppValue), RTL_TEXTENCODING_ASCII_US);
    OSL_TRACE("bootstrap.cxx::getValue - name:%s value:%s\n", sName.getStr(), sValue.getStr());
#endif

    return result;
}

typedef struct Bootstrap_Impl {
    NameValueList _nameValueList;
    OUString      _iniName;
} Bootstrap_Impl;

static void fillFromIniFile(Bootstrap_Impl * pBootstrap_Impl)
{
    OUString iniName = pBootstrap_Impl->_iniName;

#ifdef DEBUG
    OString sFile = OUStringToOString(iniName, RTL_TEXTENCODING_ASCII_US);
    OSL_TRACE("bootstrap.cxx::fillFromIniFile - %s\n", sFile.getStr());
#endif


    oslFileHandle handle;
    if(iniName.getLength()
    && osl_File_E_None == osl_openFile(iniName.pData, &handle, osl_File_OpenFlag_Read))
    {
        ByteSequence seq;
        sal_uInt64 nSize = 0;

        getFileSize(handle, &nSize);
        while( sal_True )
        {
            sal_uInt64 nPos;
            if(osl_File_E_None != osl_getFilePos(handle, &nPos)
            || nPos >= nSize)
                break;

            if(osl_File_E_None != osl_readLine(handle , (sal_Sequence ** ) &seq))
                break;

            OString line((const sal_Char *)seq.getConstArray(), seq.getLength());
            sal_Int32 nIndex = line.indexOf('=');
            struct rtl_bootstrap_NameValue nameValue;
            if(nIndex >= 1 && nIndex +1 < line.getLength())
            {
                nameValue.sName = OStringToOUString(line.copy(0,nIndex).trim(),
                                                    RTL_TEXTENCODING_ASCII_US);
                nameValue.sValue = OStringToOUString(line.copy(nIndex+1).trim(),
                                                     RTL_TEXTENCODING_UTF8);

                OString name_tmp = OUStringToOString(nameValue.sName, RTL_TEXTENCODING_ASCII_US);
                OString value_tmp = OUStringToOString(nameValue.sValue, RTL_TEXTENCODING_UTF8);
                OSL_TRACE("bootstrap.cxx: pushing: name=%s value=%s\n", name_tmp.getStr(), value_tmp.getStr());

                pBootstrap_Impl->_nameValueList.push_back(nameValue);
            }
        }
        osl_closeFile(handle);
    }
#ifdef DEBUG
    else
    {
        OString file_tmp = OUStringToOString(iniName, RTL_TEXTENCODING_ASCII_US);
        OSL_TRACE("bootstrap.cxx: couldn't open file: %s", file_tmp.getStr());
    }
#endif
}

extern "C"
{


rtlBootstrapHandle SAL_CALL rtl_bootstrap_args_open(rtl_uString * pIniName)
{
    OUString workDir;
    OUString iniName = OUString(pIniName);

    osl_getProcessWorkingDir(&workDir.pData);
    FileBase::getAbsoluteFileURL(workDir, iniName, iniName);

    Bootstrap_Impl * pBootstrap_Impl = new Bootstrap_Impl;

    pBootstrap_Impl->_iniName = iniName;
    fillFromIniFile(pBootstrap_Impl);

    return pBootstrap_Impl;
}


void SAL_CALL rtl_bootstrap_args_close(rtlBootstrapHandle handle)
{
    delete (Bootstrap_Impl *)handle;
}

sal_Bool SAL_CALL rtl_bootstrap_get_from_handle(rtlBootstrapHandle handle, rtl_uString *pName, rtl_uString **ppValue, rtl_uString *pDefault)
{
    MutexGuard guard(Mutex::getGlobalMutex());

    sal_Bool found = sal_False;
    if(ppValue && pName)
    {
        if(handle) {
            if(*ppValue) {
                rtl_uString_release(*ppValue);
                *ppValue = 0;
            }

            found = getValue(&((Bootstrap_Impl *)handle)->_nameValueList, pName, ppValue, pDefault);


            if(*ppValue)
            {
                OUString result = expandMacros(&((Bootstrap_Impl *)handle)->_nameValueList, OUString(*ppValue));

                rtl_uString_assign(ppValue, result.pData );
            }

            if(!found) {
                // fall back to executable rc
                  if(((Bootstrap_Impl *)handle)->_iniName != getIniFileNameImpl())
                    found = rtl_bootstrap_get(pName, ppValue, pDefault);
            }

            if(!*ppValue)
                rtl_uString_new(ppValue);

        }
        else
            found = rtl_bootstrap_get(pName, ppValue, pDefault);
    }


    return found;
}

void SAL_CALL rtl_bootstrap_get_iniName_from_handle(rtlBootstrapHandle handle, rtl_uString ** ppIniName)
{
    if(ppIniName)
        if(handle)
            rtl_uString_assign(ppIniName, ((Bootstrap_Impl *)handle)->_iniName.pData);

        else {
            const OUString & iniName = getIniFileNameImpl();

            rtl_uString_assign(ppIniName, iniName.pData);
        }
}

void SAL_CALL rtl_bootstrap_setIniFileName( rtl_uString *pName )
{
    MutexGuard guard( Mutex::getGlobalMutex() );
    OUString & file = getIniFileNameImpl();
    file = pName;
}

sal_Bool SAL_CALL rtl_bootstrap_get( rtl_uString *pName, rtl_uString **ppValue , rtl_uString *pDefault )
{
    MutexGuard guard( Mutex::getGlobalMutex() );

    static Bootstrap_Impl * pBootstrap_Impl = 0;

    if(!pBootstrap_Impl)
    {
        static Bootstrap_Impl bootstrap_Impl;

        bootstrap_Impl._iniName = getIniFileNameImpl();
        fillFromIniFile(&bootstrap_Impl);

        pBootstrap_Impl = &bootstrap_Impl;
    }

    return rtl_bootstrap_get_from_handle(pBootstrap_Impl, pName, ppValue, pDefault);
}

}