/**************************************************************
 * 
 * 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_plugin.hxx"

#include "osl/file.hxx"
#include "osl/thread.h"
#include "gnujre.hxx"
#include "util.hxx"

using namespace rtl;
using namespace std;
using namespace osl;

namespace jfw_plugin
{

Reference<VendorBase> GnuInfo::createInstance()
{
    return new GnuInfo;
}

char const* const* GnuInfo::getJavaExePaths(int * size)
{
    static char const * ar[] = {
        "gij",
        "bin/gij",
    };
    *size = sizeof (ar) / sizeof (char*);
    return ar;
}

#if defined(MIPS) && defined(OSL_LITENDIAN)
#define GCJ_JFW_PLUGIN_ARCH "mipsel"
#else
#define GCJ_JFW_PLUGIN_ARCH JFW_PLUGIN_ARCH
#endif

char const* const* GnuInfo::getRuntimePaths(int * size)
{
    static char const* ar[]= {
        "/libjvm.so",
        "/lib/" GCJ_JFW_PLUGIN_ARCH "/client/libjvm.so",
        "/gcj-4.1.1/libjvm.so",
        "/libgcj.so.7",
        "/libgcj.so.6"
    };
    *size = sizeof(ar) / sizeof (char*);
    return ar;
}

bool GnuInfo::initialize(vector<pair<OUString, OUString> > props)
{
    //get java.vendor, java.version, java.home,
    //javax.accessibility.assistive_technologies from system properties
    
    OUString sVendor;
    OUString sJavaLibraryPath;
    typedef vector<pair<OUString, OUString> >::const_iterator it_prop;
    OUString sVendorProperty(
        RTL_CONSTASCII_USTRINGPARAM("java.vendor"));
    OUString sVersionProperty(
        RTL_CONSTASCII_USTRINGPARAM("java.version"));
    OUString sJavaHomeProperty(
        RTL_CONSTASCII_USTRINGPARAM("java.home"));
    OUString sJavaLibraryPathProperty(
        RTL_CONSTASCII_USTRINGPARAM("java.library.path"));
    OUString sGNUHomeProperty(
        RTL_CONSTASCII_USTRINGPARAM("gnu.classpath.home.url"));
    OUString sAccessProperty(
        RTL_CONSTASCII_USTRINGPARAM("javax.accessibility.assistive_technologies"));

    bool bVersion = false;
    bool bVendor = false;
    bool bHome = false;
    bool bJavaHome = false;
    bool bJavaLibraryPath = false;
    bool bAccess = false;

    typedef vector<pair<OUString, OUString> >::const_iterator it_prop;
    for (it_prop i = props.begin(); i != props.end(); i++)
    {
        if(! bVendor && sVendorProperty.equals(i->first))
        {
            m_sVendor = i->second;
            bVendor = true;
        }
        else if (!bVersion && sVersionProperty.equals(i->first))
        {
            m_sVersion = i->second;
            bVersion = true;
        }
        else if (!bHome && sGNUHomeProperty.equals(i->first))
        {
            m_sHome = i->second;
            bHome = true;
        }
        else if (!bJavaHome && sJavaHomeProperty.equals(i->first))
        {
           OUString fileURL;
           if (osl_getFileURLFromSystemPath(i->second.pData,& fileURL.pData) ==
               osl_File_E_None)
           {
               //make sure that the drive letter have all the same case
               //otherwise file:///c:/jre and file:///C:/jre produce two
               //different objects!!!
               if (makeDriveLetterSame( & fileURL))
               {
                   m_sJavaHome = fileURL;
                   bJavaHome = true;
               }
           }
        }
        else if (!bJavaLibraryPath && sJavaLibraryPathProperty.equals(i->first))
        {
            sal_Int32 nIndex = 0;
            osl_getFileURLFromSystemPath(i->second.getToken(0, ':', nIndex).pData, &sJavaLibraryPath.pData);
            bJavaLibraryPath = true;
        }
        else if (!bAccess && sAccessProperty.equals(i->first))
        {
            if (i->second.getLength() > 0)
            {
                m_bAccessibility = true;
                bAccess = true;
            }
        }
        // the javax.accessibility.xxx property may not be set. Therefore we
        //must search through all properties.

    }
    if (!bVersion || !bVendor || !bHome)
        return false;

    if (!m_sJavaHome.getLength())
        m_sJavaHome = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("file:///usr/lib"));

    // init m_sRuntimeLibrary
    OSL_ASSERT(m_sHome.getLength());
    //call virtual function to get the possible paths to the runtime library.
    
    int size = 0;
    char const* const* arRtPaths = getRuntimePaths( & size);
    vector<OUString> libpaths = getVectorFromCharArray(arRtPaths, size);
    
    bool bRt = false;
    typedef vector<OUString>::const_iterator i_path;
    for(i_path ip = libpaths.begin(); ip != libpaths.end(); ip++)
    {
        //Construct an absolute path to the possible runtime
        OUString usRt= m_sHome + *ip;
        DirectoryItem item;
        if(DirectoryItem::get(usRt, item) == File::E_None)
        {
            //found runtime lib
            m_sRuntimeLibrary = usRt;
            bRt = true;
            break;
        }
    }

    if (!bRt)
    {
        m_sHome = m_sJavaHome;
        for(i_path ip = libpaths.begin(); ip != libpaths.end(); ip++)
        {
            //Construct an absolute path to the possible runtime
            OUString usRt= m_sHome + *ip;
            DirectoryItem item;
            if(DirectoryItem::get(usRt, item) == File::E_None)
            {
                //found runtime lib
                m_sRuntimeLibrary = usRt;
                bRt = true;
                break;
            }
        }
    }

    // try to find it by the java.library.path property
    if (!bRt && m_sJavaHome != sJavaLibraryPath)
    {
        m_sHome = sJavaLibraryPath;
        for(i_path ip = libpaths.begin(); ip != libpaths.end(); ip++)
        {
            //Construct an absolute path to the possible runtime
            OUString usRt= m_sHome + *ip;
            DirectoryItem item;
            if(DirectoryItem::get(usRt, item) == File::E_None)
            {
                //found runtime lib
                m_sRuntimeLibrary = usRt;
                bRt = true;
                break;
            }
        }
    }

#ifdef X86_64
    //Make one last final legacy attempt on x86_64 in case the distro placed it in lib64 instead
    if (!bRt && m_sJavaHome != rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("file:///usr/lib")))
    {
        m_sHome = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("file:///usr/lib64"));
        for(i_path ip = libpaths.begin(); ip != libpaths.end(); ip++)
        {
            //Construct an absolute path to the possible runtime
            OUString usRt= m_sHome + *ip;
            DirectoryItem item;
            if(DirectoryItem::get(usRt, item) == File::E_None)
            {
                //found runtime lib
                m_sRuntimeLibrary = usRt;
                bRt = true;
                break;
            }
        }
    }
#endif

    if (!bRt)
        return false;

    // init m_sLD_LIBRARY_PATH
    OSL_ASSERT(m_sHome.getLength());
    size = 0;
    char const * const * arLDPaths = getLibraryPaths( & size);
    vector<OUString> ld_paths = getVectorFromCharArray(arLDPaths, size);

    char arSep[]= {SAL_PATHSEPARATOR, 0};
    OUString sPathSep= OUString::createFromAscii(arSep);
    bool bLdPath = true;
    int c = 0;
    for(i_path il = ld_paths.begin(); il != ld_paths.end(); il ++, c++)
    {
        OUString usAbsUrl= m_sHome + *il;
        // convert to system path
        OUString usSysPath;
        if(File::getSystemPathFromFileURL(usAbsUrl, usSysPath) == File::E_None)
        {

            if(c > 0)
                m_sLD_LIBRARY_PATH+= sPathSep;
            m_sLD_LIBRARY_PATH+= usSysPath;
        }
        else
        {
            bLdPath = false;
            break;
        }
    }
    if (bLdPath == false)
        return false;
    
    return true;
}

int GnuInfo::compareVersions(const rtl::OUString&) const
{
	return 0;
}

}