// Copyright (C) 2003, 2004  Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
// et Marie Curie.
//
// This file is part of Spot, a model checking library.
//
// Spot 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.
//
// Spot 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 Spot; see the file COPYING.  If not, write to the Free
// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.

#include <ostream>
#include "tgba/tgba.hh"
#include "dotty.hh"
#include "tgba/bddprint.hh"
#include "reachiter.hh"
#include "misc/escape.hh"

namespace spot
{

  class dotty_bfs : public tgba_reachable_iterator_breadth_first
  {
  public:
    dotty_bfs(const tgba* a, std::ostream& os)
      : tgba_reachable_iterator_breadth_first(a), os_(os)
    {
    }

    void
    start()
    {
      os_ << "digraph G {" << std::endl;
      os_ << "  0 [label=\"\", style=invis, height=0]" << std::endl;
      os_ << "  0 -> 1" << std::endl;
    }

    void
    end()
    {
      os_ << "}" << std::endl;
    }

    void
    process_state(const state* s, int n, tgba_succ_iterator*)
    {
      os_ << "  " << n << " [label=\"";
      escape_str(os_, automata_->format_state(s)) << "\"]" << std::endl;
    }

    void
    process_link(int in, int out, const tgba_succ_iterator* si)
    {
      os_ << "  " << in << " -> " << out << " [label=\"";
      escape_str(os_, bdd_format_formula(automata_->get_dict(),
					 si->current_condition())) << "\\n";
      escape_str(os_,
		 bdd_format_accset(automata_->get_dict(),
				   si->current_acceptance_conditions()))
	<< "\"]" << std::endl;
    }

  private:
    std::ostream& os_;
  };

  std::ostream&
  dotty_reachable(std::ostream& os, const tgba* g)
  {
    dotty_bfs d(g, os);
    d.run();
    return os;
  }


}