// rTorrent - BitTorrent client
// Copyright (C) 2005-2006, Jari Sundell
//
// 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, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// In addition, as a special exception, the copyright holders give
// permission to link the code of portions of this program with the
// OpenSSL library under certain conditions as described in each
// individual source file, and distribute linked combinations
// including the two.
//
// You must obey the GNU General Public License in all respects for
// all of the code used other than OpenSSL.  If you modify file(s)
// with this exception, you may extend this exception to your version
// of the file(s), but you are not obligated to do so.  If you do not
// wish to do so, delete this exception statement from your version.
// If you delete this exception statement from all source files in the
// program, then also delete it here.
//
// Contact:  Jari Sundell <jaris@ifi.uio.no>
//
//           Skomakerveien 33
//           3185 Skoppum, NORWAY

#include "config.h"

#include <torrent/exceptions.h>
#include <torrent/file_list.h>

#include "display/window_file_list.h"
#include "input/manager.h"

#include "control.h"
#include "element_file_list.h"

namespace ui {

ElementFileList::ElementFileList(core::Download* d) :
  m_download(d),
  m_window(NULL),
  m_focus(0) {

  m_bindings[' '] = sigc::mem_fun(*this, &ElementFileList::receive_priority);
  m_bindings['*'] = sigc::mem_fun(*this, &ElementFileList::receive_change_all);
  m_bindings[KEY_DOWN] = sigc::mem_fun(*this, &ElementFileList::receive_next);
  m_bindings[KEY_UP] = sigc::mem_fun(*this, &ElementFileList::receive_prev);
}

void
ElementFileList::activate(Control* c, MItr mItr) {
  if (m_window != NULL)
    throw torrent::internal_error("ui::ElementFileList::activate(...) called on an object in the wrong state");

  c->input()->push_front(&m_bindings);

  *mItr = m_window = new WFileList(m_download, &m_focus);
}

void
ElementFileList::disable(Control* c) {
  if (m_window == NULL)
    throw torrent::internal_error("ui::ElementFileList::disable(...) called on an object in the wrong state");

  c->input()->erase(&m_bindings);

  delete m_window;
  m_window = NULL;
}

void
ElementFileList::receive_next() {
  if (m_window == NULL)
    throw torrent::internal_error("ui::ElementFileList::receive_next(...) called on a disabled object");

  if (++m_focus >= m_download->download()->file_list().size())
    m_focus = 0;

  m_window->mark_dirty();
}

void
ElementFileList::receive_prev() {
  if (m_window == NULL)
    throw torrent::internal_error("ui::ElementFileList::receive_prev(...) called on a disabled object");

  torrent::FileList fl = m_download->download()->file_list();

  if (fl.size() == 0)
    return;

  if (m_focus != 0)
    --m_focus;
  else 
    m_focus = fl.size() - 1;

  m_window->mark_dirty();
}

void
ElementFileList::receive_priority() {
  if (m_window == NULL)
    throw torrent::internal_error("ui::ElementFileList::receive_prev(...) called on a disabled object");

  torrent::FileList fl = m_download->download()->file_list();

  if (m_focus >= fl.size())
    return;

  torrent::File file = fl.get(m_focus);

  file.set_priority(next_priority(file.priority()));

  m_download->download()->update_priorities();
  m_window->mark_dirty();
}

void
ElementFileList::receive_change_all() {
  if (m_window == NULL)
    throw torrent::internal_error("ui::ElementFileList::receive_prev(...) called on a disabled object");

  torrent::FileList fl = m_download->download()->file_list();

  if (m_focus >= fl.size())
    return;

  Priority p = next_priority(fl.get(m_focus).priority());

  for (int i = 0, last = fl.size(); i != last; ++i)
    fl.get(i).set_priority(p);

  m_download->download()->update_priorities();
  m_window->mark_dirty();
}

ElementFileList::Priority
ElementFileList::next_priority(Priority p) {
  // Ahh... do +1 modulo.

  switch(p) {
  case torrent::File::OFF:
    return torrent::File::HIGH;

  case torrent::File::NORMAL:
    return torrent::File::OFF;

  case torrent::File::HIGH:
    return torrent::File::NORMAL;
	
  default:
    return torrent::File::NORMAL;
  };
}

}