/*************************************************************************
 *
 *  OpenOffice.org - a multi-platform office productivity suite
 *
 *  $RCSfile: lngconvex.cxx,v $
 *
 *  $Revision: 1.13 $
 *
 *  last change: $Author: rt $ $Date: 2005-09-07 19:52:45 $
 *
 *  The Contents of this file are made available subject to
 *  the terms of GNU Lesser General Public License Version 2.1.
 *
 *
 *    GNU Lesser General Public License Version 2.1
 *    =============================================
 *    Copyright 2005 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
 *
 ************************************************************************/

#if OSL_DEBUG_LEVEL == 0
#define NDEBUG
#endif

#include <tools/presys.h>
#include <windows.h>
#include <tools/postsys.h>

#define VCL_NEED_BASETSD

#include "cmdline.hxx"

#include "osl/thread.h"
#include "osl/process.h"
#include "osl/file.hxx"

#include "tools/config.hxx"
#include "tools/isolang.hxx"

#include <iostream>
#include <fstream>
#include <assert.h>
#include <map>
#include <sstream>
#include <iterator>
#include <algorithm>

namespace /* private */
{

using rtl::OUString;
using rtl::OString;

//###########################################
void ShowUsage()
{
    std::cout << "Usage: -ulf ulf_file -rc rc_output_file -rct rc_template_file -rch rch_file -rcf rcf_file" << std::endl;
    std::cout << "-ulf Name of the ulf file" << std::endl;
    std::cout << "-rc  Name of the resulting resource file" << std::endl;
    std::cout << "-rct Name of the resource template file" << std::endl;
    std::cout << "-rch Name of the resource file header" << std::endl;
    std::cout << "-rcf Name of the resource file footer" << std::endl;
}

//###########################################
inline OUString OStringToOUString(const OString& str)
{ return rtl::OStringToOUString(str, osl_getThreadTextEncoding()); }

//###########################################
inline OString OUStringToOString(const OUString& str)
{ return rtl::OUStringToOString(str, osl_getThreadTextEncoding()); }

//###########################################
/** Get the directory where the module
    is located as system directory, the
    returned directory has a trailing '\'  */
OUString get_module_path()
{
    OUString cwd_url;
    OUString module_path;
    if (osl_Process_E_None == osl_getProcessWorkingDir(&cwd_url.pData))
        osl::FileBase::getSystemPathFromFileURL(cwd_url, module_path);

    return module_path;
}

//###########################################
/** Make the absolute directory of a base and
    a relative directory, if the relative
    directory is absolute the the relative
    directory will be returned unchanged.
    Base and relative directory should be
    system paths the returned directory is
    a system path too */
OUString get_absolute_path(
    const OUString& BaseDir, const OUString& RelDir)
{
    OUString base_url;
    OUString rel_url;

    osl::FileBase::getFileURLFromSystemPath(BaseDir, base_url);
    osl::FileBase::getFileURLFromSystemPath(RelDir, rel_url);

    OUString abs_url;
    osl::FileBase::getAbsoluteFileURL(base_url, rel_url, abs_url);

    OUString abs_sys_path;
    osl::FileBase::getSystemPathFromFileURL(abs_url, abs_sys_path);

    return abs_sys_path;
}

//###########################################
OString get_absolute_file_path(const std::string& file_name)
{
    OUString fp = get_absolute_path(
        get_module_path(), OStringToOUString(file_name.c_str()));
    return OUStringToOString(fp);
}

//###########################################
/** A helper class, enables stream exceptions
    on construction, restors the old exception
    state on destruction */
class StreamExceptionsEnabler
{
public:
    explicit StreamExceptionsEnabler(
        std::ios& iostrm,
        std::ios::iostate NewIos = std::ios::failbit | std::ios::badbit) :
        m_IoStrm(iostrm),
        m_OldIos(m_IoStrm.exceptions())
    {
        m_IoStrm.exceptions(NewIos);
    }

    ~StreamExceptionsEnabler()
    {
        m_IoStrm.exceptions(m_OldIos);
    }
private:
    std::ios& m_IoStrm;
    std::ios::iostate m_OldIos;
};

typedef std::vector<std::string> string_container_t;

//###########################################
class iso_lang_identifier
{
public:
    iso_lang_identifier() {};

    iso_lang_identifier(const OString& str) :
        lang_(str)
    { init(); }

    iso_lang_identifier(const std::string& str) :
        lang_(str.c_str())
    { init(); }

    OString language() const
    { return lang_; }

    OString country() const
    { return country_; }

    OString make_OString() const
    { return lang_ + "-" + country_; }

    std::string make_std_string() const
    {
        OString tmp(lang_ + "-" + country_);
        return tmp.getStr();
    }

private:
    void init()
    {
        sal_Int32 idx = lang_.indexOf("-");

        if (idx > -1)
        {
            country_ = lang_.copy(idx + 1);
            lang_ = lang_.copy(0, idx);
        }
    }

private:
    OString lang_;
    OString country_;
};

//###########################################
/** Convert a OUString to the MS resource
    file format string e.g.
    OUString -> L"\x1A00\x2200\x3400" */
std::string make_winrc_unicode_string(const OUString& str)
{
    std::ostringstream oss;
    oss << "L\"";

    size_t length = str.getLength();
    const sal_Unicode* pchr = str.getStr();

    for (size_t i = 0; i < length; i++)
        oss << "\\x" << std::hex << (int)*pchr++;

    oss << "\"";
    return oss.str();
}

//###########################################
std::string make_winrc_unicode_string(const std::string& str)
{
    return make_winrc_unicode_string(
        OUString::createFromAscii(str.c_str()));
}

//################################################
/** A replacement table contains pairs of
    placeholders and the appropriate substitute */
class Substitutor
{
private:
    typedef std::map<std::string, std::string> replacement_table_t;
    typedef std::map<std::string, replacement_table_t*> iso_lang_replacement_table_t;

public:
    typedef iso_lang_replacement_table_t::iterator iterator;
    typedef iso_lang_replacement_table_t::const_iterator const_iterator;

    iterator begin()
    { return iso_lang_replacement_table_.begin(); }

    iterator end()
    { return iso_lang_replacement_table_.end(); }

public:

    Substitutor() {};

    ~Substitutor()
    {
        iso_lang_replacement_table_t::iterator iter_end = iso_lang_replacement_table_.end();
        iso_lang_replacement_table_t::iterator iter = iso_lang_replacement_table_.begin();

        for( /* no init */; iter != iter_end; ++iter)
            delete iter->second;

        iso_lang_replacement_table_.clear();
    }

    void set_language(const iso_lang_identifier& iso_lang)
    {
        active_iso_lang_ = iso_lang;
    }

    // If Text is a placeholder substitute it with
    //its substitute else leave it unchanged
    void substitute(std::string& Text)
    {
        replacement_table_t* prt = get_replacement_table(active_iso_lang_.make_std_string());
        assert(prt);
        replacement_table_t::iterator iter = prt->find(Text);
        if (iter != prt->end())
            Text = iter->second;
    }

    void add_substitution(
        const std::string& Placeholder, const std::string& Substitute)
    {
        replacement_table_t* prt = get_replacement_table(active_iso_lang_.make_std_string());
        assert(prt);
        prt->insert(std::make_pair(Placeholder, Substitute));
    }


private:
    // Return the replacement table for the iso lang id
    // create a new one if not already present
    replacement_table_t* get_replacement_table(const std::string& iso_lang)
    {
        iso_lang_replacement_table_t::iterator iter =
            iso_lang_replacement_table_.find(iso_lang);

        replacement_table_t* prt = NULL;

        if (iso_lang_replacement_table_.end() == iter)
        {
            prt = new replacement_table_t();
            iso_lang_replacement_table_.insert(std::make_pair(iso_lang, prt));
        }
        else
        {
            prt = iter->second;
        }
        return prt;
    }

private:
    iso_lang_replacement_table_t iso_lang_replacement_table_;
    iso_lang_identifier active_iso_lang_;
};

//###########################################
void add_group_entries(
    Config& aConfig,
    const ByteString& GroupName,
    Substitutor& Substitutor)
{
    assert(aConfig.HasGroup(GroupName));

    aConfig.SetGroup(GroupName);
    size_t key_count = aConfig.GetKeyCount();

    for (size_t i = 0; i < key_count; i++)
    {
        ByteString iso_lang = aConfig.GetKeyName(i);
        ByteString key_value_utf8 = aConfig.ReadKey(i);

        Substitutor.set_language(iso_lang_identifier(iso_lang));

        key_value_utf8.EraseLeadingAndTrailingChars('\"');

        OUString key_value_utf16 =
            rtl::OStringToOUString(key_value_utf8, RTL_TEXTENCODING_UTF8);

        Substitutor.add_substitution(
            GroupName.GetBuffer(), make_winrc_unicode_string(key_value_utf16));
    }
}

//###########################################
void read_ulf_file(const std::string& FileName, Substitutor& Substitutor)
{
    // work-around for #i32420#

    // as the Config class is currently not able to deal correctly with
    // UTF8 files starting with a byte-order-mark we create a copy of the
    // original file without the byte-order-mark
    rtl::OUString tmpfile_url;
    oslFileError osl_error = osl_createTempFile(NULL, NULL, &tmpfile_url.pData);

    rtl::OUString tmpfile_sys;
    osl::FileBase::getSystemPathFromFileURL(tmpfile_url, tmpfile_sys);

    std::ifstream in(FileName.c_str());
    std::ofstream out(OUStringToOString(tmpfile_sys).getStr());

    try
    {
        StreamExceptionsEnabler sexc_out(out);
        StreamExceptionsEnabler sexc_in(in);

        //skip the byte-order-mark 0xEF 0xBB 0xBF, identifying UTF8 files
        unsigned char BOM[3] = {0xEF, 0xBB, 0xBF};
        char buff[3];
        in.read(&buff[0], 3);

        if (memcmp(buff, BOM, 3) != 0)
            in.seekg(0);

        std::string line;
        while (std::getline(in, line))
            out << line << std::endl;
    }
    catch (const std::ios::failure& ex)
    {
        if (!in.eof())
            throw;
    }

    //Config config(OStringToOUString(FileName.c_str()).getStr());

    // end work-around for #i32420#

    Config config(tmpfile_url.getStr());
    size_t grpcnt = config.GetGroupCount();
    for (size_t i = 0; i < grpcnt; i++)
        add_group_entries(config, config.GetGroupName(i), Substitutor);
}

//###########################################
void read_file(
    const std::string& fname,
    string_container_t& string_container)
{
    std::ifstream file(fname.c_str());
    StreamExceptionsEnabler sexc(file);

    try
    {
        std::string line;
        while (std::getline(file, line))
            string_container.push_back(line);
    }
    catch(const std::ios::failure&)
    {
        if (!file.eof())
            throw;
    }
}

//###########################################
/** A simple helper function that appens the
    content of one file to another one  */
void concatenate_files(std::ostream& os, std::istream& is)
{
    StreamExceptionsEnabler os_sexc(os);
    StreamExceptionsEnabler is_sexc(is);

    try
    {
        std::string line;
        while (std::getline(is, line))
            os << line << std::endl;
    }
    catch(const std::ios::failure&)
    {
        if (!is.eof())
            throw;
    }
}

//###########################################
bool is_placeholder(const std::string& str)
{
    return ((str.length() > 1) &&
            ('%' == str[0]) &&
            ('%' == str[str.length() - 1]));
}

//###########################################
void start_language_section(
    std::ostream_iterator<std::string>& ostream_iter, const iso_lang_identifier& iso_lang)
{
    ostream_iter = std::string();

    std::string lang_section("LANGUAGE ");

    LanguageType ltype = ConvertIsoNamesToLanguage(iso_lang.language(), iso_lang.country());

    char buff[10];
    int primLangID = PRIMARYLANGID(ltype);
    int subLangID = SUBLANGID(ltype);
    // Our resources are normaly not sub language dependant.
    // Esp. for spanish we don't want to distinguish between trad.
    // and internatinal sorting ( which leads to two different sub languages )
    // Setting the sub language to neutral allows us to use one
    // stringlist for all spanish variants ( see #123126# )
    if ( ( primLangID == LANG_SPANISH ) &&
         ( subLangID == SUBLANG_SPANISH ) )
        subLangID = SUBLANG_NEUTRAL;

    _itoa(primLangID, buff, 16);
    lang_section += std::string("0x") + std::string(buff);

    lang_section += std::string(" , ");

    _itoa(subLangID, buff, 16);

    lang_section += std::string("0x") + std::string(buff);
    ostream_iter = lang_section;
}

//###########################################
/** Iterate all languages in the substitutor,
    replace the all placeholder and append the
    result to the output file */
void inflate_rc_template_to_file(
    std::ostream& os, const string_container_t& rctmpl, Substitutor& substitutor)
{
    StreamExceptionsEnabler sexc(os);

    Substitutor::const_iterator iter = substitutor.begin();
    Substitutor::const_iterator iter_end = substitutor.end();

    std::ostream_iterator<std::string> oi(os, "\n");

    for ( /**/ ;iter != iter_end; ++iter)
    {
        substitutor.set_language(iso_lang_identifier(iter->first));

        string_container_t::const_iterator rct_iter = rctmpl.begin();
        string_container_t::const_iterator rct_iter_end = rctmpl.end();

        if (!rctmpl.empty())
            start_language_section(oi, iter->first);

        for ( /**/ ;rct_iter != rct_iter_end; ++rct_iter)
        {
            std::istringstream iss = *rct_iter;
            std::string line;

            while (iss)
            {
                std::string token;
                iss >> token;
                substitutor.substitute(token);

                // #110274# HACK for partially merged
                // *.lng files where some strings have
                // a particular language that others
                // don't have in order to keep the
                // build
                if (is_placeholder(token))
                    token = make_winrc_unicode_string(token);

                line += token;
                line += " ";
            }
            oi = line;
        }
    }
}

} // namespace /* private */

//####################################################
/* MAIN
   The file names provided via command line should be
   absolute or relative to the directory of this module.

   Algo:
   1. read the ulf file and initialize the substitutor
   2. read the resource template file
   3. create the output file and append the header
   4. inflate the resource template to the output file
      for every language using the substitutor
   5. append the footer
*/
#define MAKE_ABSOLUTE(s) (get_absolute_file_path((s)).getStr())
#define ULF_FILE(c)    MAKE_ABSOLUTE((c).get_arg("-ulf"))
#define RC_TEMPLATE(c) MAKE_ABSOLUTE((c).get_arg("-rct"))
#define RC_FILE(c)     MAKE_ABSOLUTE((c).get_arg("-rc"))
#define RC_HEADER(c)   MAKE_ABSOLUTE((c).get_arg("-rch"))
#define RC_FOOTER(c)   MAKE_ABSOLUTE((c).get_arg("-rcf"))

int main(int argc, char* argv[])
{
    try
    {
        CommandLine cmdline(argc, argv);

        Substitutor substitutor;
        read_ulf_file(ULF_FILE(cmdline), substitutor);

        string_container_t rc_tmpl;
        read_file(RC_TEMPLATE(cmdline), rc_tmpl);

        std::ofstream rc_file(RC_FILE(cmdline));
        concatenate_files(rc_file, std::ifstream(RC_HEADER(cmdline)));

        inflate_rc_template_to_file(rc_file, rc_tmpl, substitutor);

        concatenate_files(rc_file, std::ifstream(RC_FOOTER(cmdline)));
    }
    catch(const std::ios::failure& ex)
    {
        std::cout << ex.what() << std::endl;
    }
    catch(std::exception& ex)
    {
        std::cout << ex.what() << std::endl;
        ShowUsage();
    }
    catch(...)
    {
        std::cout << "Unexpected error..." << std::endl;
    }
    return 0;
}

