/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2004-2015 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright (C) 2008 Wayne Stambaugh <stambaughw@gmail.com>
 * Copyright (C) 1992-2020 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

/**
 * @file pgm_base.cpp
 *
 * @brief For the main application: init functions, and language selection
 *        (locale handling)
 */

#include <wx/html/htmlwin.h>
#include <wx/fs_zip.h>
#include <wx/dir.h>
#include <wx/filename.h>
#include <wx/snglinst.h>
#include <wx/stdpaths.h>
#include <wx/sysopt.h>
#include <wx/richmsgdlg.h>
#include <wx/filedlg.h>
#include <wx/tooltip.h>

#include <build_version.h>
#include <config_params.h>
#include <confirm.h>
#include <core/arraydim.h>
#include <dialogs/dialog_configure_paths.h>
#include <eda_base_frame.h>
#include <eda_draw_frame.h>
#include <gal/gal_display_options.h>
#include <gestfich.h>
#include <hotkeys_basic.h>
#include <id.h>
#include <kiplatform/environment.h>
#include <lockfile.h>
#include <macros.h>
#include <menus_helpers.h>
#include <paths.h>
#include <pgm_base.h>
#include <settings/common_settings.h>
#include <settings/settings_manager.h>
#include <systemdirsappend.h>
#include <trace_helpers.h>


/**
 * Current list of languages supported by KiCad.
 *
 * @note Because this list is not created on the fly, wxTranslation
 * must be called when a language name must be displayed after translation.
 * Do not change this behavior, because m_Lang_Label is also used as key in config
 */
#undef _
#define _(s) s
LANGUAGE_DESCR LanguagesList[] =
{
    { wxLANGUAGE_DEFAULT,    ID_LANGUAGE_DEFAULT,    _( "Default" ),    false },
    { wxLANGUAGE_CATALAN,    ID_LANGUAGE_CATALAN,    wxT( "Català" ),   true },
    { wxLANGUAGE_CZECH,      ID_LANGUAGE_CZECH,      wxT( "Čeština" ),  true },
    { wxLANGUAGE_DANISH,     ID_LANGUAGE_DANISH,     wxT( "Dansk" ),    true },
    { wxLANGUAGE_GERMAN,     ID_LANGUAGE_GERMAN,     wxT( "Deutsch" ),  true },
    { wxLANGUAGE_GREEK,      ID_LANGUAGE_GREEK,      wxT( "Ελληνικά" ), true },
    { wxLANGUAGE_ENGLISH,    ID_LANGUAGE_ENGLISH,    wxT( "English" ),  true },
    { wxLANGUAGE_SPANISH,    ID_LANGUAGE_SPANISH,    wxT( "Español" ),  true },
    { wxLANGUAGE_FRENCH,     ID_LANGUAGE_FRENCH,     wxT( "Français" ), true },
    { wxLANGUAGE_INDONESIAN, ID_LANGUAGE_INDONESIAN, wxT( "Indonesia" ), true },
    { wxLANGUAGE_ITALIAN,    ID_LANGUAGE_ITALIAN,    wxT( "Italiano" ), true },
    { wxLANGUAGE_LITHUANIAN, ID_LANGUAGE_LITHUANIAN, wxT( "Lietuvių" ), true },
    { wxLANGUAGE_HUNGARIAN,  ID_LANGUAGE_HUNGARIAN,  wxT( "Magyar" ),   true },
    { wxLANGUAGE_JAPANESE,   ID_LANGUAGE_JAPANESE,   wxT( "日本語" ),    true },
    { wxLANGUAGE_POLISH,     ID_LANGUAGE_POLISH,     wxT( "Polski" ),   true },
    { wxLANGUAGE_PORTUGUESE, ID_LANGUAGE_PORTUGUESE, wxT( "Português" ),true },
    { wxLANGUAGE_RUSSIAN,    ID_LANGUAGE_RUSSIAN,    wxT( "Русский" ),  true },
    { wxLANGUAGE_FINNISH,    ID_LANGUAGE_FINNISH,    wxT( "Suomalainen" ),  true },
    { wxLANGUAGE_VIETNAMESE, ID_LANGUAGE_VIETNAMESE, wxT( "Tiếng việt" ), true },
    { wxLANGUAGE_TURKISH,    ID_LANGUAGE_TURKISH,    wxT( "Türk" ),     true },
    { wxLANGUAGE_CHINESE_SIMPLIFIED, ID_LANGUAGE_CHINESE_SIMPLIFIED,
            wxT( "简体中文" ), true },
    { wxLANGUAGE_CHINESE_TRADITIONAL, ID_LANGUAGE_CHINESE_TRADITIONAL,
            wxT( "繁體中文" ), false },
    { 0, 0, "", false }         // Sentinel
};
#undef _
#define _(s) wxGetTranslation((s))


PGM_BASE::PGM_BASE()
{
    m_pgm_checker = NULL;
    m_locale = NULL;
    m_Printing = false;
    m_ModalDialogCount = 0;

    m_show_env_var_dialog = true;

    setLanguageId( wxLANGUAGE_DEFAULT );

    ForceSystemPdfBrowser( false );
}


PGM_BASE::~PGM_BASE()
{
    Destroy();
}


void PGM_BASE::Destroy()
{
    // unlike a normal destructor, this is designed to be called more than once safely:
    delete m_pgm_checker;
    m_pgm_checker = 0;

    delete m_locale;
    m_locale = 0;
}


wxApp& PGM_BASE::App()
{
    wxASSERT( wxTheApp );
    return *wxTheApp;
}


void PGM_BASE::SetEditorName( const wxString& aFileName )
{
    m_editor_name = aFileName;
    wxASSERT( GetCommonSettings() );
    GetCommonSettings()->m_System.editor_name = aFileName;
}


const wxString& PGM_BASE::GetEditorName( bool aCanShowFileChooser )
{
    wxString editorname = m_editor_name;

    if( !editorname )
    {
        if( !wxGetEnv( "EDITOR", &editorname ) )
        {
            // If there is no EDITOR variable set, try the desktop default
#ifdef __WXMAC__
            editorname = "/usr/bin/open";
#elif __WXX11__
            editorname = "/usr/bin/xdg-open";
#endif
        }
    }

    // If we still don't have an editor name show a dialog asking the user to select one
    if( !editorname && aCanShowFileChooser )
    {
        DisplayInfoMessage( NULL,
                            _( "No default editor found, you must choose it" ) );

        editorname = AskUserForPreferredEditor();
    }

    // If we finally have a new editor name request it to be copied to m_editor_name and
    // saved to the preferences file.
    if( !editorname.IsEmpty() )
        SetEditorName( editorname );

    // m_editor_name already has the same value that editorname, or empty if no editor was
    // found/chosen.
    return m_editor_name;
}


const wxString PGM_BASE::AskUserForPreferredEditor( const wxString& aDefaultEditor )
{
    // Create a mask representing the executable files in the current platform
#ifdef __WINDOWS__
    wxString mask( _( "Executable file (*.exe)|*.exe" ) );
#else
    wxString mask( _( "Executable file (*)|*" ) );
#endif

    // Extract the path, name and extension from the default editor (even if the editor's
    // name was empty, this method will succeed and return empty strings).
    wxString path, name, ext;
    wxFileName::SplitPath( aDefaultEditor, &path, &name, &ext );

    // Show the modal editor and return the file chosen (may be empty if the user cancels
    // the dialog).
    return EDA_FILE_SELECTOR( _( "Select Preferred Editor" ), path,
                              name, ext, mask,
                              NULL, wxFD_OPEN | wxFD_FILE_MUST_EXIST,
                              true );
}


bool PGM_BASE::InitPgm()
{
    wxFileName pgm_name( App().argv[0] );

    wxInitAllImageHandlers();

#ifndef __WINDOWS__
    if( wxString( wxGetenv( "HOME" ) ).IsEmpty() )
    {
        DisplayErrorMessage( nullptr, _( "Environmental variable HOME is empty.  Unable to continue." ) );
        return false;
    }
#endif

    m_pgm_checker = new wxSingleInstanceChecker( pgm_name.GetName().Lower() + wxT( "-" ) +
                                                 wxGetUserId(), GetKicadLockFilePath() );

    if( m_pgm_checker->IsAnotherRunning() )
    {
        wxString quiz =
                wxString::Format( _( "%s is already running. Continue?" ), pgm_name.GetName() );

        if( !IsOK( NULL, quiz ) )
            return false;
    }

    // Init KiCad environment
    // the environment variable KICAD (if exists) gives the kicad path:
    // something like set KICAD=d:\kicad
    bool isDefined = wxGetEnv( "KICAD", &m_kicad_env );

    if( isDefined )    // ensure m_kicad_env ends by "/"
    {
        m_kicad_env.Replace( WIN_STRING_DIR_SEP, UNIX_STRING_DIR_SEP );

        if( !m_kicad_env.IsEmpty() && m_kicad_env.Last() != '/' )
            m_kicad_env += UNIX_STRING_DIR_SEP;
    }

    // Init parameters for configuration
    App().SetVendorName( "KiCad" );
    App().SetAppName( pgm_name.GetName().Lower() );

    // Install some image handlers, mainly for help
    if( wxImage::FindHandler( wxBITMAP_TYPE_PNG ) == NULL )
        wxImage::AddHandler( new wxPNGHandler );

    if( wxImage::FindHandler( wxBITMAP_TYPE_GIF ) == NULL )
        wxImage::AddHandler( new wxGIFHandler );

    if( wxImage::FindHandler( wxBITMAP_TYPE_JPEG ) == NULL )
        wxImage::AddHandler( new wxJPEGHandler );

    wxFileSystem::AddHandler( new wxZipFSHandler );

    // Analyze the command line & initialize the binary path
    wxString tmp;
    setExecutablePath();
    SetLanguagePath();
    SetDefaultLanguage( tmp );

    m_settings_manager = std::make_unique<SETTINGS_MANAGER>();

    // Something got in the way of settings load: can't continue
    if( !m_settings_manager->IsOK() )
        return false;

    wxFileName baseSharePath;
#if defined( __WXMSW__ )
    // Make the paths relative to the executable dir as KiCad might be installed anywhere
    // It follows the Windows installer paths scheme, where binaries are installed in
    // PATH/bin and extra files in PATH/share/kicad
    baseSharePath.AssignDir( m_bin_dir + "\\.." );
    baseSharePath.Normalize();
#else
    baseSharePath.AssignDir( wxString( wxT( DEFAULT_INSTALL_PATH ) ) );
#endif

#if !defined( __WXMAC__ )
    baseSharePath.AppendDir( "share" );
    baseSharePath.AppendDir( "kicad" );
#endif

    // KICAD6_FOOTPRINT_DIR
    wxString envVarName = wxT( "KICAD6_FOOTPRINT_DIR" );
    ENV_VAR_ITEM envVarItem;
    wxString envValue;
    wxFileName tmpFileName;

    if( wxGetEnv( envVarName, &envValue ) == true && !envValue.IsEmpty() )
    {
        tmpFileName.AssignDir( envValue );
        envVarItem.SetDefinedExternally( true );
        wxLogTrace( traceEnvVars, "PGM_BASE::InitPgm: Found entry %s externally", envVarName );
    }
    else
    {
        tmpFileName = baseSharePath;
        tmpFileName.AppendDir( "modules" );
        envVarItem.SetDefinedExternally( false );
    }

    envVarItem.SetValue( tmpFileName.GetPath() );
    wxLogTrace( traceEnvVars, "PGM_BASE::InitPgm: Setting entry %s = %s",
                envVarName, envVarItem.GetValue() );
    m_local_env_vars[ envVarName ] = envVarItem;

    // KICAD6_3DMODEL_DIR
    envVarName = wxT( "KICAD6_3DMODEL_DIR" );

    if( wxGetEnv( envVarName, &envValue ) == true && !envValue.IsEmpty() )
    {
        tmpFileName.AssignDir( envValue );
        envVarItem.SetDefinedExternally( true );
        wxLogTrace( traceEnvVars, "PGM_BASE::InitPgm: Found entry %s externally", envVarName );
    }
    else
    {
        tmpFileName = baseSharePath;
        tmpFileName.AppendDir( "3dmodels" );
        envVarItem.SetDefinedExternally( false );
    }

    envVarItem.SetValue( tmpFileName.GetFullPath() );
    wxLogTrace( traceEnvVars, "PGM_BASE::InitPgm: Setting entry %s = %s",
                envVarName, envVarItem.GetValue() );
    m_local_env_vars[ envVarName ] = envVarItem;

    // KICAD6_TEMPLATE_DIR
    envVarName = "KICAD6_TEMPLATE_DIR";

    if( wxGetEnv( envVarName, &envValue ) == true && !envValue.IsEmpty() )
    {
        tmpFileName.AssignDir( envValue );
        envVarItem.SetDefinedExternally( true );
        wxLogTrace( traceEnvVars, "PGM_BASE::InitPgm: Found entry %s externally", envVarName );
    }
    else
    {
        // Attempt to find the best default template path.
        SEARCH_STACK bases;
        SEARCH_STACK templatePaths;

        SystemDirsAppend( &bases );

        for( unsigned i = 0; i < bases.GetCount(); ++i )
        {
            wxFileName fn( bases[i], wxEmptyString );

            // Add KiCad template file path to search path list.
            fn.AppendDir( "template" );

            // Only add path if exists and can be read by the user.
            if( fn.DirExists() && fn.IsDirReadable() )
            {
                wxLogTrace( tracePathsAndFiles, "Checking template path '%s' exists",
                            fn.GetPath() );
                templatePaths.AddPaths( fn.GetPath() );
            }
        }

        if( templatePaths.IsEmpty() )
        {
            tmpFileName = baseSharePath;
            tmpFileName.AppendDir( "template" );
        }
        else
        {
            // Take the first one.  There may be more but this will likely be the best option.
            tmpFileName.AssignDir( templatePaths[0] );
        }

        envVarItem.SetDefinedExternally( false );
    }

    envVarItem.SetValue( tmpFileName.GetPath() );
    wxLogTrace( traceEnvVars, "PGM_BASE::InitPgm: Setting entry %s = %s", envVarName,
                envVarItem.GetValue() );
    m_local_env_vars[ envVarName ] = envVarItem;

    // KICAD_USER_TEMPLATE_DIR
    envVarName = "KICAD_USER_TEMPLATE_DIR";

    if( wxGetEnv( envVarName, &envValue ) == true && !envValue.IsEmpty() )
    {
        tmpFileName.AssignDir( envValue );
        envVarItem.SetDefinedExternally( true );
        wxLogTrace( traceEnvVars, "PGM_BASE::InitPgm: Found entry %s externally", envVarName );
    }
    else
    {
        // Default user template path.
        tmpFileName.AssignDir( PATHS::GetUserTemplatesPath() );
        envVarItem.SetDefinedExternally( false );
    }

    envVarItem.SetValue( tmpFileName.GetPath() );
    wxLogTrace( traceEnvVars, "PGM_BASE::InitPgm: Setting entry %s = %s",
                envVarName, envVarItem.GetValue() );
    m_local_env_vars[ envVarName ] = envVarItem;

    // KICAD_SYMBOLS
    envVarName = wxT( "KICAD6_SYMBOL_DIR" );

    if( wxGetEnv( envVarName, &envValue ) == true && !envValue.IsEmpty() )
    {
        tmpFileName.AssignDir( envValue );
        envVarItem.SetDefinedExternally( true );
        wxLogTrace( traceEnvVars, "PGM_BASE::InitPgm: Found entry %s externally", envVarName );
    }
    else
    {
        tmpFileName = baseSharePath;
        tmpFileName.AppendDir( "library" );
        envVarItem.SetDefinedExternally( false );
    }

    envVarItem.SetValue( tmpFileName.GetPath() );
    wxLogTrace( traceEnvVars, "PGM_BASE::InitPgm: Setting entry %s = %s",
                envVarName, envVarItem.GetValue() );
    m_local_env_vars[ envVarName ] = envVarItem;

    GetSettingsManager().Load( GetCommonSettings() );

    // Init user language *before* calling loadCommonSettings, because
    // env vars could be incorrectly initialized on Linux
    // (if the value contains some non ASCII7 chars, the env var is not initialized)
    SetLanguage( tmp, true );

    loadCommonSettings();

    ReadPdfBrowserInfos();      // needs GetCommonSettings()

#ifdef __WXMAC__
    // Always show filters on Open dialog to be able to choose plugin
    wxSystemOptions::SetOption( wxOSX_FILEDIALOG_ALWAYS_SHOW_TYPES, 1 );
#endif

    // TODO(JE): Remove this if apps are refactored to not assume Prj() always works
    // Need to create a project early for now (it can have an empty path for the moment)
    GetSettingsManager().LoadProject( "" );

    // TODO: Move tooltips into KIPLATFORM
    // This sets the maximum tooltip display duration to 10s (up from 5) but only affects
    // Windows as other platforms display tooltips while the mouse is not moving
    wxToolTip::SetAutoPop( 10000 );

    return true;
}


bool PGM_BASE::setExecutablePath()
{
    m_bin_dir = wxStandardPaths::Get().GetExecutablePath();

#ifdef __WXMAC__
    // On OSX Pgm().GetExecutablePath() will always point to main
    // bundle directory, e.g., /Applications/kicad.app/

    wxFileName fn( m_bin_dir );

    if( fn.GetName() == wxT( "kicad" ) )
    {
        // kicad launcher, so just remove the Contents/MacOS part
        fn.RemoveLastDir();
        fn.RemoveLastDir();
    }
    else
    {
        // standalone binaries live in Contents/Applications/<standalone>.app/Contents/MacOS
        fn.RemoveLastDir();
        fn.RemoveLastDir();
        fn.RemoveLastDir();
        fn.RemoveLastDir();
        fn.RemoveLastDir();
    }

    m_bin_dir = fn.GetPath() + wxT( "/" );
#else
    // Use unix notation for paths. I am not sure this is a good idea,
    // but it simplifies compatibility between Windows and Unices.
    // However it is a potential problem in path handling under Windows.
    m_bin_dir.Replace( WIN_STRING_DIR_SEP, UNIX_STRING_DIR_SEP );

    // Remove file name form command line:
    while( m_bin_dir.Last() != '/' && !m_bin_dir.IsEmpty() )
        m_bin_dir.RemoveLast();
#endif

    return true;
}


void PGM_BASE::loadCommonSettings()
{
    m_help_size.x = 500;
    m_help_size.y = 400;

    m_show_env_var_dialog = GetCommonSettings()->m_Env.show_warning_dialog;
    m_editor_name = GetCommonSettings()->m_System.editor_name;

    for( const auto& it : GetCommonSettings()->m_Env.vars )
    {
        wxString key( it.first.c_str(), wxConvUTF8 );
        wxLogTrace( traceEnvVars, "PGM_BASE::loadCommonSettings: Found entry %s = %s",
                    key, it.second );

        // Do not store the env var PROJECT_VAR_NAME ("KIPRJMOD") definition if for some reason
        // it is found in config. (It is reserved and defined as project path)
        if( key == PROJECT_VAR_NAME )
            continue;

        if( m_local_env_vars[ key ].GetDefinedExternally() )
            continue;

        wxLogTrace( traceEnvVars, "PGM_BASE::loadCommonSettings: Updating entry %s = %s",
                    key, it.second );

        m_local_env_vars[ key ] = ENV_VAR_ITEM( it.second, wxGetEnv( it.first, nullptr ) );
    }

    for( auto& m_local_env_var : m_local_env_vars )
        SetLocalEnvVariable( m_local_env_var.first, m_local_env_var.second.GetValue() );
}


void PGM_BASE::SaveCommonSettings()
{
    // GetCommonSettings() is not initialized until fairly late in the
    // process startup: InitPgm(), so test before using:
    if( GetCommonSettings() )
    {
        GetCommonSettings()->m_System.working_dir = wxGetCwd();
        GetCommonSettings()->m_Env.show_warning_dialog = m_show_env_var_dialog;

        // remove only the old env vars that do not exist in list.
        // We do not clear the full list because some are defined externally,
        // and we cannot modify or delete them
        std::map<std::string, wxString>& curr_vars = GetCommonSettings()->m_Env.vars;

        for( auto it = curr_vars.begin(); it != curr_vars.end(); )
        {
            const std::string& key = it->first;

            if( m_local_env_vars.find( key ) == m_local_env_vars.end() )
                it = curr_vars.erase( it );     // This entry no longer exists in new list
            else
                it++;
        }

       // Save the local environment variables.
        for( auto& m_local_env_var : m_local_env_vars )
        {
            if( m_local_env_var.second.GetDefinedExternally() )
                continue;

            wxLogTrace( traceEnvVars,
                        "PGM_BASE::SaveCommonSettings: Saving environment variable config "
                        "entry %s as %s",
                        m_local_env_var.first, m_local_env_var.second.GetValue() );

            std::string key( m_local_env_var.first.ToUTF8() );
            GetCommonSettings()->m_Env.vars[ key ] = m_local_env_var.second.GetValue();
        }
    }
}


COMMON_SETTINGS* PGM_BASE::GetCommonSettings() const
{
    return GetSettingsManager().GetCommonSettings();
}


bool PGM_BASE::SetLanguage( wxString& aErrMsg, bool first_time )
{
    if( first_time )
    {
        setLanguageId( wxLANGUAGE_DEFAULT );
        // First time SetLanguage is called, the user selected language id is set
        // from common user config settings
        wxString languageSel = GetCommonSettings()->m_System.language;

        // Search for the current selection
        for( unsigned ii = 0; LanguagesList[ii].m_KI_Lang_Identifier != 0; ii++ )
        {
            if( LanguagesList[ii].m_Lang_Label == languageSel )
            {
                setLanguageId( LanguagesList[ii].m_WX_Lang_Identifier );
                break;
            }
        }
    }

    // dictionary file name without extend (full name is kicad.mo)
    wxString dictionaryName( "kicad" );

    delete m_locale;
    m_locale = new wxLocale;

    if( !m_locale->Init( m_language_id ) )
    {
        wxLogTrace( traceLocale, "This language is not supported by the system." );

        setLanguageId( wxLANGUAGE_DEFAULT );
        delete m_locale;

        m_locale = new wxLocale;
        m_locale->Init();

        aErrMsg = _( "This language is not supported by the operating system." );
        return false;
    }
    else if( !first_time )
    {
        wxLogTrace( traceLocale, "Search for dictionary %s.mo in %s",
                    dictionaryName, m_locale->GetName() );
    }

    if( !first_time )
    {
        // If we are here, the user has selected another language.
        // Therefore the new preferred language name is stored in common config.
        // Do NOT store the wxWidgets language Id, it can change between wxWidgets
        // versions, for a given language
        wxString languageSel;

        // Search for the current selection language name
        for( unsigned ii = 0;  LanguagesList[ii].m_KI_Lang_Identifier != 0; ii++ )
        {
            if( LanguagesList[ii].m_WX_Lang_Identifier == m_language_id )
            {
                languageSel = LanguagesList[ii].m_Lang_Label;
                break;
            }
        }

        COMMON_SETTINGS* cfg = GetCommonSettings();
        cfg->m_System.language = languageSel;
        cfg->SaveToFile( GetSettingsManager().GetPathForSettingsFile( cfg ) );
    }

    // Try adding the dictionary if it is not currently loaded
    if( !m_locale->IsLoaded( dictionaryName ) )
        m_locale->AddCatalog( dictionaryName );

    // Verify the Kicad dictionary was loaded properly
    // However, for the English language, the dictionary is not mandatory, as
    // all messages are already in English, just restricted to ASCII7 chars,
    // the verification is skipped.
    if( !m_locale->IsLoaded( dictionaryName ) && m_language_id != wxLANGUAGE_ENGLISH )
    {
        wxLogTrace( traceLocale, "Unable to load dictionary %s.mo in %s",
                    dictionaryName, m_locale->GetName() );

        setLanguageId( wxLANGUAGE_DEFAULT );
        delete m_locale;

        m_locale = new wxLocale;
        m_locale->Init();

        aErrMsg = _( "The KiCad language file for this language is not installed." );
        return false;
    }

    return true;
}


bool PGM_BASE::SetDefaultLanguage( wxString& aErrMsg )
{
    setLanguageId( wxLANGUAGE_DEFAULT );

    // dictionary file name without extend (full name is kicad.mo)
    wxString dictionaryName( "kicad" );

    delete m_locale;
    m_locale = new wxLocale;
    m_locale->Init();

    // Try adding the dictionary if it is not currently loaded
    if( !m_locale->IsLoaded( dictionaryName ) )
        m_locale->AddCatalog( dictionaryName );

    // Verify the Kicad dictionary was loaded properly
    // However, for the English language, the dictionary is not mandatory, as
    // all messages are already in English, just restricted to ASCII7 chars,
    // the verification is skipped.
    if( !m_locale->IsLoaded( dictionaryName ) && m_language_id != wxLANGUAGE_ENGLISH )
    {
        wxLogTrace( traceLocale, "Unable to load dictionary %s.mo in %s",
                    dictionaryName, m_locale->GetName() );

        setLanguageId( wxLANGUAGE_DEFAULT );
        delete m_locale;

        m_locale = new wxLocale;
        m_locale->Init();

        aErrMsg = _( "The KiCad language file for this language is not installed." );
        return false;
    }

    return true;
}


void PGM_BASE::SetLanguageIdentifier( int menu_id )
{
    wxLogTrace( traceLocale, "Select language ID %d from %d possible languages.",
                menu_id, (int)arrayDim( LanguagesList )-1 );

    for( unsigned ii = 0;  LanguagesList[ii].m_KI_Lang_Identifier != 0; ii++ )
    {
        if( menu_id == LanguagesList[ii].m_KI_Lang_Identifier )
        {
            setLanguageId( LanguagesList[ii].m_WX_Lang_Identifier );
            break;
        }
    }
}


void PGM_BASE::SetLanguagePath()
{
    SEARCH_STACK    guesses;

    SystemDirsAppend( &guesses );

    // Add our internat dir to the wxLocale catalog of paths
    for( unsigned i = 0; i < guesses.GetCount(); i++ )
    {
        wxFileName fn( guesses[i], wxEmptyString );

        // Append path for Windows and unix KiCad package install
        fn.AppendDir( "share" );
        fn.AppendDir( "internat" );

        if( fn.IsDirReadable() )
        {
            wxLogTrace( traceLocale, "Adding locale lookup path: " + fn.GetPath() );
            wxLocale::AddCatalogLookupPathPrefix( fn.GetPath() );
        }

        // Append path for unix standard install
        fn.RemoveLastDir();
        fn.AppendDir( "kicad" );
        fn.AppendDir( "internat" );

        if( fn.IsDirReadable() )
        {
            wxLogTrace( traceLocale, "Adding locale lookup path: " + fn.GetPath() );
            wxLocale::AddCatalogLookupPathPrefix( fn.GetPath() );
        }

	// Append path for macOS install
        fn.RemoveLastDir();
        fn.RemoveLastDir();
        fn.RemoveLastDir();
        fn.AppendDir( "internat" );

        if( fn.IsDirReadable() )
        {
            wxLogTrace( traceLocale, "Adding locale lookup path: " + fn.GetPath() );
            wxLocale::AddCatalogLookupPathPrefix( fn.GetPath() );
        }
    }

    if( wxGetEnv( wxT( "KICAD_RUN_FROM_BUILD_DIR" ), nullptr ) )
    {
        wxFileName fn( Pgm().GetExecutablePath() );
        fn.RemoveLastDir();
        fn.AppendDir( "translation" );
        wxLocale::AddCatalogLookupPathPrefix( fn.GetPath() );
    }
}


bool PGM_BASE::SetLocalEnvVariable( const wxString& aName, const wxString& aValue )
{
    wxString env;

    // Check to see if the environment variable is already set.
    if( wxGetEnv( aName, &env ) )
    {
        wxLogTrace( traceEnvVars,
                    "PGM_BASE::SetLocalEnvVariable: Environment variable %s already set to %s",
                    aName, env );
        return env == aValue;
    }

    wxLogTrace( traceEnvVars,
                "PGM_BASE::SetLocalEnvVariable: Setting local environment variable %s to %s",
                aName, aValue );

    return wxSetEnv( aName, aValue );
}


void PGM_BASE::SetLocalEnvVariables( const ENV_VAR_MAP& aEnvVarMap )
{
    m_local_env_vars.clear();
    m_local_env_vars = aEnvVarMap;

    SaveCommonSettings();

    // Overwrites externally defined environment variable until the next time the application
    // is run.
    for( auto& m_local_env_var : m_local_env_vars )
    {
        wxLogTrace( traceEnvVars,
                    "PGM_BASE::SetLocalEnvVariables: Setting local environment variable %s to %s",
                    m_local_env_var.first,
                    m_local_env_var.second.GetValue() );
        wxSetEnv( m_local_env_var.first, m_local_env_var.second.GetValue() );
    }
}