/////////////////////////////////////////////////////////////////////////////
// Name:        helpview.h
// Purpose:     HelpView application
//              A standalone viewer for wxHTML Help (.htb) files
// Author:      Vaclav Slavik, Julian Smart
// Created:     2002-07-09
// Copyright:   (c) 2002 Vaclav Slavik, Julian Smart and others
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"

// for all others, include the necessary headers (this file is usually all you
// need because it includes almost all "standard" wxWidgets headers
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif

#include "wx/filename.h"
#include "wx/image.h"
#include "wx/wxhtml.h"
#include "wx/fs_zip.h"
#include "wx/log.h"
#include "wx/artprov.h"
#include "wx/filedlg.h"

#include "helpview.h"

class AlternateArtProvider : public wxArtProvider
{
protected:
    virtual wxBitmap CreateBitmap(const wxArtID& id, const wxArtClient& client,
                                  const wxSize& size);
};

wxIMPLEMENT_APP(hvApp);

hvApp::hvApp()
{
#if wxUSE_IPC
    m_server = nullptr;
#endif
}

bool hvApp::OnInit()
{
    wxArtProvider::Push(new AlternateArtProvider);

    int istyle = wxHF_DEFAULT_STYLE;

    wxString service, windowName, titleFormat, argStr;
    wxString book[10];
    int bookCount = 0;
    int i;
    bool hasService = false;
    bool hasWindowName = false;
    bool createServer = false;

#if wxUSE_IPC
    m_server = nullptr;
#endif

    // Help books are recognized by extension ".hhp" ".htb" or ".zip".
    // Service and window_name can occur anywhere in arguments,
    // but service must be first
    // Other arguments (topic?) could be added

    //  modes of operation:
    //  1) no arguments - stand alone, prompt user for book
    //  2) books only - stand alone, open books
    //  3) "--server" as (any) arg - start connection with default service;
    //     also open any books passed as other arguments
    //  4) at least one argument which is not book, and not "--server" - take first
    //     such argument as service, second (if present) as window name,
    //     start service, open any books

    for( i=1; i<argc; i++ )
    {
        argStr = argv[i];

        if ( argStr.Find( wxT(".hhp") ) >= 0
            || argStr.Find( wxT(".htb") ) >= 0
            || argStr.Find( wxT(".zip") ) >= 0 )
        {
            book[bookCount] = argStr;
            bookCount++;
        }
        else if ( argStr == wxT("--server") )
        {
            createServer = true;
#if defined(__WXMSW__)
            service = wxT("generic_helpservice");
#elif defined(__UNIX__)
            service = wxT("/tmp/") + wxString(wxT("generic_helpservice"));
#else
            service = wxT("4242");
#endif
        }
        else if ( !hasService )
        {
            service = argStr;
            hasService = true;
            createServer = true;
        }
        else if ( !hasWindowName )
        {
            windowName = argStr;
            hasWindowName = true;
        }
        else if ( argStr.Find( wxT("--Style") )  >= 0 )
        {
            long style;
            wxString numb = argStr.AfterLast(wxT('e'));
            if ( !(numb.ToLong(&style) ) )
            {
                wxLogError( wxT("Integer conversion failed for --Style") );
            }
            else
            {
                istyle = style;
            }
        }
        else
        {
            //unknown - could be topic?
        }
    }

    // No book - query user; but not on Mac, since there
    // may be an AppleEvent to open a document on the way
#ifndef __WXMAC__
    if ( bookCount < 1 )
    {
        wxString s = wxFileSelector( wxT("Open help file"),
            wxGetCwd(),
            wxEmptyString,
            wxEmptyString,
            wxT("Help books (*.htb)|*.htb|Help books (*.zip)|*.zip|HTML Help Project (*.hhp)|*.hhp"),
            wxFD_OPEN | wxFD_FILE_MUST_EXIST,
            nullptr);

        if (!s.empty())
        {
            book[0] = s;
            bookCount = 1;
        }
    }
#endif

#if wxUSE_IPC

    if ( createServer )
    {
        // Create a new server
        m_server = new hvServer;

        if ( !m_server->Create(service) )
        {
            wxString wxm = wxT("Server Create failed - service: ");
            wxString xxm = wxm << service;
            wxLogError( xxm );
            //if MSW quits here, probably another copy already exists
            return false;
        }
        createServer = false;
        wxUnusedVar(createServer);
    }

#endif  // wxUSE_IPC

    //now add help
    wxInitAllImageHandlers();
    wxFileSystem::AddHandler(new wxZipFSHandler);

    SetVendorName(wxT("wxWidgets") );
    SetAppName(wxT("wxHTMLHelpServer") );
    wxConfig::Get(); // create an instance

    m_helpController = new wxHtmlHelpController( istyle );

    // By default, the application doesn't continue running if only the help
    // frame remains. This makes sense for the programs doing something else
    // and also showing help, but as this one only shows help, we should keep
    // it running as long as this frame is opened.
    m_helpController->SetShouldPreventAppExit(true);

    if ( !hasWindowName )
    {
        titleFormat = wxT("Help: %s") ;
    }
    else
    {
        //remove underscores
        windowName.Replace( wxT("_"), wxT(" ") );
        titleFormat = windowName;
    }

    m_helpController->SetTitleFormat( titleFormat );

    for( i=0; i<bookCount; i++ )
    {
        wxFileName fileName(book[i]);
        m_helpController->AddBook(fileName);
    }

    m_helpController->DisplayContents();

    return true;
}


int hvApp::OnExit()
{
#if wxUSE_IPC
    wxObjectList::compatibility_iterator node = m_connections.GetFirst();
    while (node)
    {
        wxObjectList::compatibility_iterator next = node->GetNext();
        hvConnection* connection = (hvConnection*) node->GetData();
        connection->Disconnect();
        delete connection;
        node = next;
    }
    m_connections.Clear();

    if (m_server)
    {
        delete m_server;
        m_server = nullptr;
    }
#endif

    delete m_helpController;
    delete wxConfig::Set(nullptr);

    return 0;
}

bool hvApp::OpenBook(wxHtmlHelpController* controller)
{
    wxString s = wxFileSelector(_("Open help file"),
        wxGetCwd(),
        wxEmptyString,
        wxEmptyString,
        _(
        "Help books (*.htb)|*.htb|Help books (*.zip)|*.zip|\
        HTML Help Project (*.hhp)|*.hhp"),
        wxFD_OPEN | wxFD_FILE_MUST_EXIST,
        nullptr);

    if ( !s.empty() )
    {
        wxString ext = s.Right(4).Lower();
        if (ext == wxT(".zip") || ext == wxT(".htb") || ext == wxT(".hhp"))
        {
            wxBusyCursor bcur;
            wxFileName fileName(s);
            controller->AddBook(fileName);
            return true;
        }
    }

    return false;
}

#ifdef __WXMAC__
/// Respond to Apple Event for opening a document
void hvApp::MacOpenFiles(const wxArrayString& fileNames)
{
    wxBusyCursor bcur;
    wxFileName fileName(fileNames[0]);
    m_helpController->AddBook(fileName);
    m_helpController->DisplayContents();
}
#endif


/*
* Art provider class
*/

// ---------------------------------------------------------------------
// helper macros
// ---------------------------------------------------------------------

// Standard macro for getting a resource from XPM file:
#define ART(artId, xpmRc) \
if ( id == artId ) return wxBitmap(xpmRc##_xpm);

#define GET_STD_ICON_FROM_APP(iconId)

// There are two ways of getting the standard icon: either via XPMs or via
// wxIcon ctor. This depends on the platform:
#if defined(__WXUNIVERSAL__)
#define CREATE_STD_ICON(iconId, xpmRc) return wxNullBitmap;
#elif defined(__WXGTK__)
#define CREATE_STD_ICON(iconId, xpmRc) return wxBitmap(xpmRc##_xpm);
#else
#define CREATE_STD_ICON(iconId, xpmRc) \
{ \
    wxIcon icon(wxT(iconId)); \
    wxBitmap bmp; \
    bmp.CopyFromIcon(icon); \
    return bmp; \
}
#endif

// Macro used in CreateBitmap to get wxICON_FOO icons:
#define ART_MSGBOX(artId, iconId, xpmRc) \
    if ( id == artId ) \
{ \
    GET_STD_ICON_FROM_APP(iconId) \
    CREATE_STD_ICON(#iconId, xpmRc) \
}

// ---------------------------------------------------------------------
// XPMs with the art
// ---------------------------------------------------------------------

// XPM hack: make the arrays const
//#define static static const

#include "bitmaps/helpback.xpm"
#include "bitmaps/helpbook.xpm"
#include "bitmaps/helpdown.xpm"
#include "bitmaps/helpforward.xpm"
#include "bitmaps/helpoptions.xpm"
#include "bitmaps/helppage.xpm"
#include "bitmaps/helpsidepanel.xpm"
#include "bitmaps/helpup.xpm"
#include "bitmaps/helpuplevel.xpm"
#include "bitmaps/helpicon.xpm"
#include "bitmaps/helpopen.xpm"

//#undef static

// ---------------------------------------------------------------------
// CreateBitmap routine
// ---------------------------------------------------------------------

wxBitmap AlternateArtProvider::CreateBitmap(const wxArtID& id,
                                            const wxArtClient& client,
                                            const wxSize& WXUNUSED(size))
{
    ART(wxART_HELP_SIDE_PANEL,                     helpsidepanel)
        ART(wxART_HELP_SETTINGS,                       helpoptions)
        ART(wxART_HELP_BOOK,                           helpbook)
        ART(wxART_HELP_FOLDER,                         helpbook)
        ART(wxART_HELP_PAGE,                           helppage)
        //ART(wxART_ADD_BOOKMARK,                        addbookm)
        //ART(wxART_DEL_BOOKMARK,                        delbookm)
        ART(wxART_GO_BACK,                             helpback)
        ART(wxART_GO_FORWARD,                          helpforward)
        ART(wxART_GO_UP,                               helpup)
        ART(wxART_GO_DOWN,                             helpdown)
        ART(wxART_GO_TO_PARENT,                        helpuplevel)
        ART(wxART_FILE_OPEN,                           helpopen)
        if (client == wxART_HELP_BROWSER)
        {
            //ART(wxART_FRAME_ICON,                          helpicon)
            ART(wxART_HELP,                          helpicon)
        }

        //ART(wxART_GO_HOME,                             home)

        // Any wxWidgets icons not implemented here
        // will be provided by the default art provider.
        return wxNullBitmap;
}

#if wxUSE_IPC

wxConnectionBase *hvServer::OnAcceptConnection(const wxString& topic)
{
    if (topic == wxT("HELP"))
        return new hvConnection();
    else
        return nullptr;
}

// ----------------------------------------------------------------------------
// hvConnection
// ----------------------------------------------------------------------------

hvConnection::hvConnection()
: wxConnection()
{
    wxGetApp().GetConnections().Append(this);
}

hvConnection::~hvConnection()
{
    wxGetApp().GetConnections().DeleteObject(this);
}

bool hvConnection::OnExec(const wxString& WXUNUSED(topic),
                          const wxString& data)
{
    //    wxLogStatus("Execute command: %s", data);

    if ( data == "--intstring" )
    {
        long i;
        wxString argStr = data;
        wxString numb = argStr.AfterLast(wxT('g'));
        if ( !(numb.ToLong(&i) ) )
        {
            wxLogError( wxT("Integer conversion failed for --intstring") );
        }
        else
        {
            wxGetApp().GetHelpController()->Display(int(i));
        }
    }
    else
    {
        wxGetApp().GetHelpController()->Display(data);
    }

    return true;
}

bool hvConnection::OnPoke(const wxString& WXUNUSED(topic),
                          const wxString& item,
                          const void *buf,
                          size_t size,
                          wxIPCFormat format)
{
    const wxString data = GetTextFromData(buf, size, format);

    //    wxLogStatus("Poke command: %s = %s", item, data);
    //topic is not tested

    if ( wxGetApp().GetHelpController() )
    {
        if ( item == wxT("--AddBook") )
        {
            wxGetApp().GetHelpController()->AddBook(data);
        }
        else if ( item == wxT("--DisplayContents") )
        {
            wxGetApp().GetHelpController()->DisplayContents();
        }
        else if ( item == wxT("--DisplayIndex") )
        {
            wxGetApp().GetHelpController()->DisplayIndex();
        }
        else if ( item == wxT("--KeywordSearch") )
        {
            wxGetApp().GetHelpController()->KeywordSearch(data);
        }
        else if ( item == wxT("--SetTitleFormat") )
        {
            wxString newname = data;
            newname.Replace( wxT("_"), wxT(" ") );
            wxGetApp().GetHelpController()->SetTitleFormat(newname);
            //does not redraw title bar?
            //wxGetApp().GetHelpController()->ReFresh(); - or something
        }
        else if ( item == wxT("--SetTempDir") )
        {
            wxGetApp().GetHelpController()->SetTempDir(data);
        }
        else if ( item == wxT("--YouAreDead") )
        {
            // don't really know how to kill app from down here...
            // use wxKill from client instead
            //wxWindow *win = wxTheApp->GetTopWindow();
            //if ( win )
            //    win->Destroy();
        }
    }

    return true;
}

#endif // #if wxUSE_IPC
