// navlist.hxx -- navaids management class
//
// Written by Curtis Olson, started April 2000.
//
// Copyright (C) 2000  Curtis L. Olson - http://www.flightgear.org/~curt
//
// 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
// $Id$


#ifndef _FG_NAVLIST_HXX
#define _FG_NAVLIST_HXX


#include <simgear/compiler.h>

#include <simgear/structure/SGSharedPtr.hxx>

#include <map>
#include <vector>
#include <string>

#include "navrecord.hxx"

// forward decls
class SGGeod;

// FGNavList ------------------------------------------------------------------

typedef SGSharedPtr<FGNavRecord> nav_rec_ptr;
typedef std::vector < nav_rec_ptr > nav_list_type;
typedef nav_list_type::iterator nav_list_iterator;
typedef nav_list_type::const_iterator nav_list_const_iterator;

typedef std::map < int, nav_list_type > nav_map_type;
typedef nav_map_type::iterator nav_map_iterator;
typedef nav_map_type::const_iterator nav_map_const_iterator;

class FGNavList {

    nav_list_type carrierlist;
    nav_map_type navaids;

    // Given a point and a list of stations, return the closest one to
    // the specified point.
    FGNavRecord *findNavFromList( const SGGeod &aircraft,
                                  const nav_list_type &stations );

public:

    FGNavList();
    ~FGNavList();

    // initialize the nav list
    bool init();

    // add an entry
    bool add( FGNavRecord *n );

    /** Query the database for the specified station.  It is assumed
      * that there will be multiple stations with matching frequencies
      * so a position must be specified.
      */
    FGNavRecord *findByFreq( double freq, const SGGeod& position);

    // Given an Ident and optional freqency and type , 
    // return a list of matching stations.
    const nav_list_type findByIdentAndFreq( const std::string& ident,
        const double freq = 0.0, const FGPositioned::Type = FGPositioned::INVALID );

    // Given an Ident and optional freqency and type , 
    // return a list of matching stations sorted by distance to the given position
    const nav_list_type findByIdentAndFreq( const SGGeod & position,
        const std::string& ident, const double freq = 0.0, 
        const FGPositioned::Type = FGPositioned::INVALID );

    // given a frequency returns the first matching entry
    FGNavRecord *findStationByFreq( double frequency );
};




// FGTACANList ----------------------------------------------------------------


typedef SGSharedPtr<FGTACANRecord> tacan_rec_ptr;
typedef std::vector < tacan_rec_ptr > tacan_list_type;
typedef std::map < int, tacan_list_type > tacan_map_type;
typedef std::map < std::string, tacan_list_type > tacan_ident_map_type;

class FGTACANList {

    tacan_list_type channellist;
    tacan_map_type channels;
    tacan_ident_map_type ident_channels;

public:

    FGTACANList();
    ~FGTACANList();

    // initialize the TACAN list
    bool init();

    // add an entry
    bool add( FGTACANRecord *r );

    // Given a TACAN Channel, return the appropriate frequency.
    FGTACANRecord *findByChannel( const std::string& channel );


};
#endif // _FG_NAVLIST_HXX
