/*
 *
 *   Text control with an history of commands typed
 *
 *    Nicolas Boichat, July 2004
 *
 *    Version $Id: wxbhistorytextctrl.cpp 4992 2007-06-07 14:46:43Z kerns $
 */
/*
   Bacula® - The Network Backup Solution

   Copyright (C) 2004-2006 Free Software Foundation Europe e.V.

   The main author of Bacula is Kern Sibbald, with contributions from
   many others, a complete list can be found in the file AUTHORS.
   This program is Free Software; you can redistribute it and/or
   modify it under the terms of version two of the GNU General Public
   License as published by the Free Software Foundation and included
   in the file LICENSE.

   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, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301, USA.

   Bacula® is a registered trademark of John Walker.
   The licensor of Bacula is the Free Software Foundation Europe
   (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
   Switzerland, email:ftf@fsfeurope.org.
*/

/*  Windows debug builds set _DEBUG which is used by wxWidgets to select their
 *  debug memory allocator.  Unfortunately it conflicts with Bacula's SmartAlloc.
 * So we turn _DEBUG off since we aren't interested in things it enables.
 */

#undef _DEBUG

#include "bacula.h"
#include "wxbhistorytextctrl.h"

BEGIN_EVENT_TABLE(wxbHistoryTextCtrl, wxTextCtrl)
   EVT_KEY_DOWN(wxbHistoryTextCtrl::OnKeyDown)
   EVT_KEY_UP(wxbHistoryTextCtrl::OnKeyUp)
END_EVENT_TABLE()

wxbHistoryTextCtrl::wxbHistoryTextCtrl(wxStaticText* help, 
      wxWindow* parent, wxWindowID id, 
      const wxString& value, const wxPoint& pos, 
      const wxSize& size , 
      const wxValidator& validator, 
      const wxString& name): 
         wxTextCtrl(parent, id, value, pos, size, 
            wxTE_PROCESS_ENTER, validator, name) {
   this->help = help;
   index = 0;
   history.Add(wxT(""));
}

void wxbHistoryTextCtrl::AddCommand(wxString cmd, wxString description) {
   commands[cmd] = description;
}

void wxbHistoryTextCtrl::ClearCommandList() {
   commands.clear();
}

void wxbHistoryTextCtrl::HistoryAdd(wxString cmd) {
   if (cmd == wxT("")) return;
   index = history.Count();
   history[index-1] = cmd;
   history.Add(wxT(""));
}

void wxbHistoryTextCtrl::SetValue(const wxString& value) {
   if (value == wxT("")) {
      help->SetLabel(_("Type your command below:"));
   }
   wxTextCtrl::SetValue(value);
}

void wxbHistoryTextCtrl::OnKeyDown(wxKeyEvent& event) {
   if (event.m_keyCode == WXK_TAB) {

   }
   else {
      event.Skip();
   }
}

void wxbHistoryTextCtrl::OnKeyUp(wxKeyEvent& event) {
   if (event.m_keyCode == WXK_UP) {
      if (index > 0) {
         if (index == ((int)history.Count()-1)) {
            history[index] = GetValue();
         }
         index--;
         SetValue(history[index]);
         SetInsertionPointEnd();
      }
   }
   else if (event.m_keyCode == WXK_DOWN) {
      if (index < ((int)history.Count()-1)) {
         index++;
         SetValue(history[index]);
         SetInsertionPointEnd();
      }      
   }
   else if (GetValue() != wxT("")) {
      wxbCommands::iterator it;
      wxString key;
      wxString helptext = _("Unknown command.");
      int found = 0;      
      for( it = commands.begin(); it != commands.end(); ++it ) {         
         if (it->first.Find(GetValue()) == 0) {
            found++;
            if (found > 2) {
               helptext += wxT(" ") + it->first;
            }
            else if (found > 1) {
               helptext = _("Possible completions: ") + key + wxT(" ") + it->first;
            }
            else { // (found == 1)
               helptext = it->first + wxT(": ") + it->second;
               key = it->first;
            }
         }
         else if (GetValue().Find(it->first) == 0) {
            helptext = it->first + wxT(": ") + it->second;
            found = 0;
            break;
         }
      }
      
      help->SetLabel(helptext);
            
      if (event.m_keyCode == WXK_TAB) {
         if (found == 1) {
            SetValue(key);
            SetInsertionPointEnd();
         }
      }
      else {
         event.Skip();
      }
   }
   else {
      help->SetLabel(_("Type your command below:"));
      event.Skip();
   }
}