/*
 * --- GSMP-COPYRIGHT-NOTE-BEGIN ---
 * 
 * This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 * Please add additional copyright information _after_ the line containing
 * the GSMP-COPYRIGHT-NOTE-END tag. Otherwise it might get removed by
 * the ./scripts/Create-CopyPatch script. Do not edit this copyright text!
 * 
 * GSMP: dam/include/template/Watcher.tcc
 * General Sound Manipulation Program is Copyright (C) 2000 - 2004
 *   Valentin Ziegler and René Rebe
 * 
 * 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; version 2. A copy of the GNU General
 * Public License can be found 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 MERCHANT-
 * ABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 * 
 * --- GSMP-COPYRIGHT-NOTE-END ---
 */

// -*- c++ -*-

#ifndef DAM__WATCHER_TMPL__
#error "This file is included by Watcher.hh."
#error "Include that file instead." 
#endif


namespace DAM
{

  template <typename STATES, typename REACTOR, typename WL_TRAITS>
  AutomatonWatcher <STATES, REACTOR, WL_TRAITS>::AutomatonWatcher (REACTOR* reactor, Automaton* automaton, StateSlot state_slot,
								   NotifSlot notif_slot, QuerySlot query_slot, TermSlot term_slot)
    : m_logger (this)
  {
    this -> reactor = reactor;
    this -> state_slot = state_slot;
    this -> notif_slot = notif_slot;
    this -> query_slot = query_slot;
    this -> term_slot = term_slot;
    this -> automaton = 0; // the reference is set to NIL which ensures that
                           // the initial call to SwitchAutomaton () will not
                           // try to disconnect the slots

    Q_LOG(m_logger) << "watching " << FilteredTypeName <STATES> ()
	  << " for " << FilteredTypeName <REACTOR> () << "  " << reactor << std::endl;
    SwitchAutomaton (automaton);
  }
 
  template <typename STATES, typename REACTOR, typename WL_TRAITS>
  typename AutomatonWatcher <STATES, REACTOR, WL_TRAITS>::state_id AutomatonWatcher <STATES, REACTOR, WL_TRAITS>::CurrentState ()
  {
    if (!automaton)
      {
	if (m_logger.DoWarn () && !automaton)
	  Q_WARN(m_logger) << "CurrentState () called for NIL automaton" << std::endl;
	return (state_id) 0;
      }

    return automaton -> GetState ();
  }

  template <typename STATES, typename REACTOR, typename WL_TRAITS>
  typename AutomatonWatcher <STATES, REACTOR, WL_TRAITS>::Automaton* AutomatonWatcher <STATES, REACTOR, WL_TRAITS>::CurrentAutomaton ()
  {
    return automaton;
  }


  template <typename STATES, typename REACTOR, typename WL_TRAITS>
  void AutomatonWatcher <STATES, REACTOR, WL_TRAITS>::SwitchAutomaton (Automaton* automaton)
  {
    Q_LOG(m_logger) << "switching automaton from " << this -> automaton
	  << " to " << automaton << std::endl;

    if (this -> automaton)
      {
	conn_state_slot.disconnect ();
	conn_notif_slot.disconnect ();
	conn_query_slot.disconnect ();
	conn_term_slot.disconnect ();
      }

    this -> automaton = automaton;

    if (automaton)
      {
	conn_state_slot = automaton -> StateChanged.connect (sigc::mem_fun (reactor, state_slot));
	conn_notif_slot = automaton -> Notification.connect (sigc::mem_fun (reactor, notif_slot));
	conn_query_slot = automaton -> Question.connect (sigc::mem_fun (reactor, query_slot));
	conn_term_slot = automaton -> Terminated.connect (sigc::mem_fun (reactor, term_slot));

	Q_LOG(m_logger) << "current state is " << STATES::FullState (CurrentState ()).name << std::endl;
      }
  }

} // end namespace DAM