//-----------------------------------------------------------------
// Game Engine Object
// C++ Header - GameEngine.h
//-----------------------------------------------------------------

#pragma once

//-----------------------------------------------------------------
// Include Files
//-----------------------------------------------------------------
#include <windows.h>
#include <mmsystem.h>
#include <vector>
using namespace std;
#include "Sprite.h"

//-----------------------------------------------------------------
// Joystick Flags
//-----------------------------------------------------------------
typedef WORD    JOYSTATE;
const JOYSTATE  JOY_NONE  = 0x0000L,
                JOY_LEFT  = 0x0001L,
                JOY_RIGHT = 0x0002L,
                JOY_UP    = 0x0004L,
                JOY_DOWN  = 0x0008L,
                JOY_FIRE1 = 0x0010L,
                JOY_FIRE2 = 0x0020L;

//-----------------------------------------------------------------
// Windows Function Declarations
//-----------------------------------------------------------------
int WINAPI        WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow);
LRESULT CALLBACK  WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);

//-----------------------------------------------------------------
// Game Engine Function Declarations
//-----------------------------------------------------------------
BOOL GameInitialize(HINSTANCE hInstance);
void GameStart(HWND hWindow);
void GameEnd();
void GameActivate(HWND hWindow);
void GameDeactivate(HWND hWindow);
void GamePaint(HDC hDC);
void GameCycle();
void HandleKeys();
void MouseButtonDown(int x, int y, BOOL bLeft);
void MouseButtonUp(int x, int y, BOOL bLeft);
void MouseMove(int x, int y);
void HandleJoystick(JOYSTATE jsJoystickState);
BOOL SpriteCollision(Sprite* pSpriteHitter, Sprite* pSpriteHittee);

//-----------------------------------------------------------------
// GameEngine Class
//-----------------------------------------------------------------
class GameEngine
{
protected:
  // Member Variables
  static GameEngine*  m_pGameEngine;
  HINSTANCE           m_hInstance;
  HWND                m_hWindow;
  TCHAR               m_szWindowClass[32];
  TCHAR               m_szTitle[32];
  WORD                m_wIcon, m_wSmallIcon;
  int                 m_iWidth, m_iHeight;
  int                 m_iFrameDelay;
  BOOL                m_bSleep;
  UINT                m_uiJoystickID;
  RECT                m_rcJoystickTrip;
  vector<Sprite*>     m_vSprites;

  // Helper Methods
  BOOL                CheckSpriteCollision(Sprite* pTestSprite);

public:
  // Constructor(s)/Destructor
          GameEngine(HINSTANCE hInstance, LPTSTR szWindowClass, LPTSTR szTitle,
            WORD wIcon, WORD wSmallIcon, int iWidth = 640, int iHeight = 480);
  virtual ~GameEngine();

  // General Methods
  static GameEngine*  GetEngine() { return m_pGameEngine; };
  BOOL                Initialize(int iCmdShow);
  LRESULT             HandleEvent(HWND hWindow, UINT msg, WPARAM wParam,
                        LPARAM lParam);
  void                ErrorQuit(LPTSTR szErrorMsg);
  BOOL                InitJoystick();
  void                CaptureJoystick();
  void                ReleaseJoystick();
  void                CheckJoystick();
  void                AddSprite(Sprite* pSprite);
  void                DrawSprites(HDC hDC);
  void                UpdateSprites();
  void                CleanupSprites();
  Sprite*             IsPointInSprite(int x, int y);

  // Accessor Methods
  HINSTANCE GetInstance() { return m_hInstance; };
  HWND      GetWindow() { return m_hWindow; };
  void      SetWindow(HWND hWindow) { m_hWindow = hWindow; };
  LPTSTR    GetTitle() { return m_szTitle; };
  WORD      GetIcon() { return m_wIcon; };
  WORD      GetSmallIcon() { return m_wSmallIcon; };
  int       GetWidth() { return m_iWidth; };
  int       GetHeight() { return m_iHeight; };
  int       GetFrameDelay() { return m_iFrameDelay; };
  void      SetFrameRate(int iFrameRate) { m_iFrameDelay = 1000 /
              iFrameRate; };
  BOOL      GetSleep() { return m_bSleep; };
  void      SetSleep(BOOL bSleep) { m_bSleep = bSleep; };
};