/*  Starshatter: The Open Source Project
    Copyright (c) 2021-2022, Starshatter: The Open Source Project Contributors
    Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
    Copyright (c) 1997-2006, Destroyer Studios LLC.

    AUTHOR:       John DiCamillo

*/

#ifndef Game_h
#define Game_h

#include "ApplicationDX9.h"
#include "Types.h"
#include "Screen.h"
#include "Video.h"

// +--------------------------------------------------------------------+

LRESULT CALLBACK  WndProc(HWND, UINT, WPARAM, LPARAM);

void              FlushKeys();
void              BufferKey(int vkey);
int               GetKey();
int               GetKeyPlus(int& key, int& shift);
void              ProcessKeyMessage();

// +--------------------------------------------------------------------+

class Universe;
class Sound;
class SoundCard;
class Video;
class VideoFactory;
class VideoSettings;
class Text;

// +--------------------------------------------------------------------+

class Game : public ApplicationDX9
{
public:
    static const char* TYPENAME() { return "Game"; }
    enum STATUS { OK, RUN, EXIT, PANIC, INIT_FAILED, TOO_MANY };

    Game();
    virtual ~Game();

    //
    // MAIN GAME FUNCTIONALITY:
    //

    virtual bool      Init(HINSTANCE hi, HINSTANCE hpi, LPSTR cmdline, int nCmdShow);
    virtual int       Run();
    virtual void      Exit();
    virtual bool      OnPaint()      { return false;  }
    virtual bool      OnHelp()       { return false;  }

    virtual void      Activate(bool f);
    virtual void      Pause(bool f);
    int               Status() const { return status; }

    const RenderStats& GetPolyStats() { return stats;  }

    //
    // GENERAL GAME CLASS UTILITY METHODS:
    //

    static Game*       GetInstance();
    static void        Panic(const char* msg=0);
    static const char* GetPanicMessage()          { return panicbuf; }

    bool              DisplayModeSupported(int w, int h, int bpp);
    int               MaxTexSize();
    int               MaxTexAspect();
    int               GammaLevel();
    void              SetGammaLevel(int g);
    void              SetMaxTexSize(int n);

    DWORD             RealTime();
    DWORD             GameTime();
    DWORD             TimeCompression();
    void              SetTimeCompression(DWORD comp);
    DWORD             Frame();
    void              ResetGameTime();
    void              SkipGameTime(double seconds);

    double            FrameRate();
    double            FrameTime();
    double            GUITime();
    void              SetMaxFrameLength(double seconds) { max_frame_length = seconds; }
    void              SetMinFrameLength(double seconds) { min_frame_length = seconds; }
    double            GetMaxFrameLength()               { return max_frame_length;    }
    double            GetMinFrameLength()               { return min_frame_length;    }

    Video*            GetVideo();
    Color             GetScreenColor();
    void              SetScreenColor(Color c);
    int               GetScreenWidth();
    int               GetScreenHeight();

    bool              Active()       { return active;     }
    bool              Paused()       { return paused;     }
    bool              Server()       { return server;     }
    bool              ShowMouse()    { return show_mouse; }
    bool              IsWindowed();

    HINSTANCE         GetHINST();
    HWND              GetHWND();

    virtual bool      GameLoop();
    virtual void      UpdateWorld();
    virtual void      GameState();
    virtual void      UpdateScreen();
    virtual void      CollectStats();

    virtual bool      InitApplication(HINSTANCE);
    virtual bool      InitInstance(HINSTANCE, int);
    virtual bool      InitGame();
    virtual bool      InitVideo();
    virtual bool      ResizeVideo();
    virtual bool      ResetVideo();
    virtual bool      ToggleFullscreen();
    virtual bool      AdjustWindowForChange();

    virtual bool      SetupPalette();
    virtual bool      LoadPalette(PALETTEENTRY* pal, BYTE* inv);
    virtual void      ShowStats();

protected:
    friend  LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM uParam, LPARAM lParam);

    Universe*         world;
    VideoFactory*     video_factory;
    Video*            video;
    VideoSettings*    video_settings;
    SoundCard*        soundcard;
    Screen*           screen;
    int               gamma;
    int               max_tex_size;

    RenderStats       stats;
    DWORD             totaltime;

    PALETTEENTRY      standard_palette[256];
    BYTE              inverse_palette[32768];

    HINSTANCE         hInst;
    HWND              hwnd;
    HMENU             hmenu;
    DWORD             winstyle;

    char*             app_name;
    char*             title_text;
    char*             palette_name;

    // Internal variables for the state of the app
    bool              is_windowed;
    bool              is_active;
    bool              is_device_lost;
    bool              is_minimized;
    bool              is_maximized;
    bool              ignore_size_change;
    bool              is_device_initialized;
    bool              is_device_restored;
    DWORD             window_style;        // Saved window style for mode switches
    RECT              bounds_rect;         // Saved window bounds for mode switches
    RECT              client_rect;         // Saved client area size for mode switches


    double            gui_seconds;
    double            seconds;
    double            frame_rate;
    int               frame_count;
    int               frame_count0;
    int               frame_time;
    int               frame_time0;

    int               status;
    int               exit_code;
    Color             screen_color;

    bool              active;
    bool              paused;
    bool              server;
    bool              show_mouse;
    DWORD             base_game_time;
    DWORD             real_time;
    DWORD             game_time;
    DWORD             time_comp;
    DWORD             frame_number;

    double            max_frame_length;
    double            min_frame_length;

    static char       panicbuf[256];
};

// +--------------------------------------------------------------------+

#endif  // Game_h