#include "GameEngine.h"

GameEngine *GameEngine::m_pGameEngine = NULL;


int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
	MSG			msg;
	static int iTickTrigger = 0;
	int iTickCount;

	if (GameInitialize(hInstance))
	{
	//initialize the game engine
	if(!GameEngine::GetEngine() ->Initialize(iCmdShow))
		return FALSE;

	while (TRUE)
	{
		if(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
		{
			if(msg.message == WM_QUIT)
				break;
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
		else
		{
			if(!GameEngine::GetEngine()->GetSleep())
			{

				iTickCount = GetTickCount();
				if(iTickCount > iTickTrigger)
				{
					iTickTrigger = iTickCount +
						GameEngine::GetEngine() ->GetFrameDelay();
					GameCycle();
				}
			}
		}
	}
	return (int)msg.wParam;
}
GameEnd();

return TRUE;
}

LRESULT CALLBACK WndProc(HWND hWindow, UINT msg, WPARAM wParam, LPARAM lParam)
{
	return GameEngine::GetEngine() ->HandleEvent(hWindow, msg, wParam, lParam);
}


GameEngine::GameEngine(HINSTANCE hInstance, LPTSTR szWindowClass, LPTSTR szTitle,
					   WORD wIcon, WORD wSmallIcon, int iWidth, int iHeight)
{

	m_pGameEngine = this;
	m_hInstance = hInstance;
	m_hWindow = NULL;
	if (lstrlen(szWindowClass) > 0)
		lstrcpy(m_szWindowClass, szWindowClass);
	if (lstrlen(szTitle) > 0)
		lstrcpy(m_szTitle, szTitle);
	m_wIcon = wIcon;
	m_wSmallIcon = wSmallIcon;
	m_iWidth = iWidth;
	m_iHeight = iHeight;
	m_iFrameDelay = 50;
	m_bSleep = TRUE;
}

GameEngine::~GameEngine()
{
}

BOOL GameEngine::Initialize(int iCmdShow)
{
	WNDCLASSEX  wndclass;

	wndclass.cbSize  = sizeof(wndclass);
	wndclass.style   = CS_HREDRAW ¦ CS_VREDRAW; //error C2146, error C2065, error C2143
	wndclass.lpfnWndProc = WndProc;
	wndclass.cbClsExtra = 0;
	wndclass.cbWndExtra = 0;
	wndclass.hInstance = m_hInstance;
	wndclass.hIcon = LoadIcon(m_hInstance, MAKEINTRESOURCE(GetIcon()));
	wndclass.hIconSm = LoadIcon(m_hInstance, MAKEINTRESOURCE(GetSmallIcon()));
	wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
	wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
	wndclass.lpszMenuName = NULL;
	wndclass.lpszClassName = m_szWindowClass;

	if (!RegisterClassEx(&wndclass))
		return FALSE;

	int iWindowWidth = m_iWidth + GetSystemMetrics(SM_CXFIXEDFRAME) * 2,
		iWindowHeight = m_iHeight + GetSystemMetrics(SM_CYFIXEDFRAME) * 2 + 
		GetSystemMetrics(SM_CYCAPTION);
	if (wndclass.lpszMenuName != NULL)
		iWindowHeight += GetSystemMetrics(SM_CYMENU);
	int iXWindowPos = (GetSystemMetrics(SM_CXSCREEN) - iWindowWidth) / 2,
		iYWindowPos = (GetSystemMetrics(SM_CYSCREEN) - iWindowHeight) / 2;

	m_hWindow = CreateWindow(m_szWindowClass, m_szTitle, WS_POPUPWINDOW ¦
		WS_CAPTION ¦ WS_MINIMIZEBOX, iXWindowPos, iYWindowPos, iWindowHeight, iWindowWidth, NULL , NULL, m_hInstance, NULL);
	// this is errorr line error C2146, C2660, C2059
	if (!m_hWindow)
		return FALSE;

	ShowWindow(m_hWindow, iCmdShow);
	UpdateWindow(m_hWindow);

	return TRUE;
}

LRESULT GameEngine::HandleEvent(HWND hWindow, UINT msg, WPARAM wParam,
								LPARAM lParam)
{
	switch(msg)
	{
	case WM_CREATE:
		SetWindow(hWindow);
		GameStart(hWindow);
		return 0;

	case WM_SETFOCUS:
		GameActivate(hWindow);
		SetSleep(FALSE);
		return 0;
	case WM_KILLFOCUS:
		GameDeactivate(hWindow);
		SetSleep(TRUE);
		return 0;
	case WM_PAINT:
		HDC			hDC;
		PAINTSTRUCT ps;
		hDC = BeginPaint(hWindow, &ps);

		GamePaint(hDC);

		EndPaint(hWindow, &ps);
		return 0;

	case WM_DESTROY:
		GameEnd();
		PostQuitMessage(0);
		return 0;
	}
	return DefWindowProc(hWindow, msg, wParam, lParam);
}