// globals.hxx -- Global state that needs to be shared among the sim modules
//
// Written by Curtis Olson, started July 2000.
//
// Copyright (C) 2000  Curtis L. Olson - curt@flightgear.org
//
// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// $Id$


#ifndef _GLOBALS_HXX
#define _GLOBALS_HXX

#include <simgear/compiler.h>

#include <vector>
#include STL_STRING

SG_USING_STD( vector );
SG_USING_STD( string );

typedef vector<string> string_list;


// Forward declarations

// This file is included, directly or indirectly, almost everywhere in
// FlightGear, so if any of its dependencies changes, most of the sim
// has to be recompiled.  Using these forward declarations helps us to
// avoid including a lot of header files (and thus, a lot of
// dependencies).  Since Most of the methods simply set or return
// pointers, we don't need to know anything about the class details
// anyway.

class SGEphemeris;
class SGMagVar;
class SGRoute;
class SGTime;
class SGPropertyNode;
class SGCommandMgr;

class FGLogger;
class FGEnvironmentMgr;
class FGEnvironment;
class FGControls;
class FGSoundMgr;
class FGAutopilot;
class FGFX;
class FGViewMgr;
class FGViewer;
class FGATCMgr;
class FGATCDisplay;
class FGAIMgr;
class FGAircraftModel;


/**
 * Bucket for subsystem pointers representing the sim's state.
 */
class FGGlobals
{

private:

    // Number of milliseconds elapsed since the start of the program.
    long elapsed_time_ms;

    // Root of FlightGear data tree
    string fg_root;

    // Root of FlightGear scenery tree
    string fg_scenery;

#if 0
    // Freeze sim
    bool freeze;
#endif

    // Fullscreen mode for old 3DFX cards.
#if defined(FX) && defined(XMESA)
    bool fullscreen;
#endif

    // An offset in seconds from the true time.  Allows us to adjust
    // the effective time of day.
    long int warp;

    // How much to change the value of warp each iteration.  Allows us
    // to make time progress faster than normal (or even run in reverse.)
    long int warp_delta;

    // Logger
    FGLogger *logger;

    // Time structure
    SGTime *time_params;

    // Sky structures
    SGEphemeris *ephem;

    // Magnetic Variation
    SGMagVar *mag;

    // Current autopilot
    FGAutopilot *autopilot;

    // Global autopilot "route"
    SGRoute *route;

    // sound manager
    FGSoundMgr *soundmgr;

    // sound-effects manager
    FGFX *fx;

    // environment information
    FGEnvironmentMgr * environment_mgr;

    // ATC manager
    FGATCMgr *ATC_mgr;

    // ATC Renderer
    FGATCDisplay *ATC_display;

    // AI manager
    FGAIMgr *AI_mgr;

    // control input state
    FGControls *controls;

    // viewer manager
    FGViewMgr *viewmgr;

    // properties
    SGPropertyNode *props;
    SGPropertyNode *initial_state;

    SGCommandMgr *commands;

    FGAircraftModel *acmodel;

    // list of serial port-like configurations
    string_list *channel_options_list;

public:

    FGGlobals();
    ~FGGlobals();

    inline long get_elapsed_time_ms () const { return elapsed_time_ms; }
    inline void set_elapsed_time_ms (long t) { elapsed_time_ms = t; }

    inline const string &get_fg_root () const { return fg_root; }
    inline void set_fg_root (const string &root) { fg_root = root; }

    inline const string &get_fg_scenery () const { return fg_scenery; }
    inline void set_fg_scenery (const string &scenery) {
      fg_scenery = scenery;
    }

#if 0
    inline bool get_freeze() const { return freeze; }
    inline void set_freeze( bool f ) { freeze = f; }
#endif

#if defined(FX) && defined(XMESA)
    inline bool get_fullscreen() const { return fullscreen; }
    inline bool set_fullscreen( bool f ) { fullscreen = f; }
#endif

    inline long int get_warp() const { return warp; }
    inline void set_warp( long int w ) { warp = w; }
    inline void inc_warp( long int w ) { warp += w; }

    inline long int get_warp_delta() const { return warp_delta; }
    inline void set_warp_delta( long int d ) { warp_delta = d; }
    inline void inc_warp_delta( long int d ) { warp_delta += d; }

    inline FGLogger * get_logger () { return logger; }
    inline void set_logger (FGLogger * l) { logger = l; }

    inline SGTime *get_time_params() const { return time_params; }
    inline void set_time_params( SGTime *t ) { time_params = t; }

    inline SGEphemeris *get_ephem() const { return ephem; }
    inline void set_ephem( SGEphemeris *e ) { ephem = e; }

    inline SGMagVar *get_mag() const { return mag; }
    inline void set_mag( SGMagVar *m ) { mag = m; }

    inline FGAutopilot *get_autopilot() const { return autopilot; }
    inline void set_autopilot( FGAutopilot *ap) { autopilot = ap; }

    inline SGRoute *get_route() const { return route; }
    inline void set_route( SGRoute *r ) { route = r; }

    inline FGEnvironmentMgr * get_environment_mgr() {
      return environment_mgr;
    }
    inline void set_environment_mgr(FGEnvironmentMgr * mgr) {
      environment_mgr = mgr;
    }
    const FGEnvironment * get_environment() const;
    const FGEnvironment * get_environment(double lat, double lon,
					  double alt) const;

    inline FGATCMgr *get_ATC_mgr() const { return ATC_mgr; }
    inline void set_ATC_mgr( FGATCMgr *a ) {ATC_mgr = a; }

    inline FGATCDisplay *get_ATC_display() const { return ATC_display; }
    inline void set_ATC_display( FGATCDisplay *d ) {ATC_display = d; } 
    
    inline FGAIMgr *get_AI_mgr() const { return AI_mgr; }
    inline void set_AI_mgr( FGAIMgr *a ) {AI_mgr = a; }

    inline FGSoundMgr *get_soundmgr() const { return soundmgr; }
    inline void set_soundmgr( FGSoundMgr *sm ) { soundmgr = sm; }

    inline FGFX *get_fx() const { return fx; }
    inline void set_fx( FGFX *x ) { fx = x; }

    inline FGControls *get_controls() const { return controls; }
    inline void set_controls( FGControls *c ) { controls = c; }

    inline FGViewMgr *get_viewmgr() const { return viewmgr; }
    inline void set_viewmgr( FGViewMgr *vm ) { viewmgr = vm; }
    FGViewer *get_current_view() const;

    inline SGPropertyNode *get_props () { return props; }
    inline void set_props( SGPropertyNode *n ) { props = n; }

    inline SGCommandMgr *get_commands () { return commands; }

    inline FGAircraftModel *get_aircraft_model () { return acmodel; }

    inline void set_aircraft_model (FGAircraftModel * model)
    {
        acmodel = model;
    }

    inline string_list *get_channel_options_list () {
	return channel_options_list;
    }
    inline void set_channel_options_list( string_list *l ) {
	channel_options_list = l;
    }


    /**
     * Save the current state as the initial state.
     */
    void saveInitialState ();


    /**
     * Restore the saved initial state, if any.
     */
    void restoreInitialState ();

};


extern FGGlobals *globals;


#endif // _GLOBALS_HXX