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#include <Windows.h>

#define Assert(cond) do {if(!(cond)) *(int*)0 = 5;} while(0);

int Run = 0;


LRESULT CALLBACK WindowProcedure(HWND WindowHandle, UINT Message, WPARAM WParam ,LPARAM LParam)
{
    LRESULT Result = 0;

    switch (Message)
    {
    case WM_CREATE:
        {
            OutputDebugString("Window Created\n");
            Run = 1;
        } break;

    case WM_CLOSE:
        {
            OutputDebugString("Window Was closed\n");
            Run = 0;
        } break;

    default:
        {
            Result = DefWindowProc(WindowHandle, Message, WParam, LParam);
        }

    }

    return (Result);
}


void Win32ReportError(char* ErrorMessage)
{
    char Buffer[1024];
    DWORD Error = GetLastError();
    char const* Msg = "With Error Code = ";

    int Index = 0;
    while(*ErrorMessage)
    {
        Buffer[Index++] = *ErrorMessage++;
    }
    Buffer[Index++] = ' '; Buffer[Index++] = '|'; Buffer[Index++] = ' ';

    while(*Msg)
    {
        Buffer[Index++] = *Msg;
    }

    int ErrorCodeSize = 1;
    int Copy = Error;
    while(Copy /= 10)
    {
        ErrorCodeSize++;
    }
    for(int I = 0; I < ErrorCodeSize; ++I)
    {
        Buffer[Index + ErrorCodeSize - I - 1] = Error % 10;
        Error /= 10;
    }
    Buffer[Index + ErrorCodeSize] = 0;

    OutputDebugString(Buffer);
    MessageBox(0, Buffer, "Error Happened", MB_OK);
    Assert(0);

}

int WinMain(HINSTANCE Instance, HINSTANCE PrevInstance, LPSTR CommandLine, int Shown)
{
    WNDCLASS WindowClass      = {};
    WindowClass.style         = CS_HREDRAW | CS_VREDRAW;
    WindowClass.lpfnWndProc   = WindowProcedure;
    WindowClass.hInstance     = Instance;
    WindowClass.lpszClassName = "AClass";

    if(!RegisterClass(&WindowClass))
    {
        Win32ReportError("Failed to register a Window Class");
    }

    HWND WindowHandle = CreateWindow("AClass", "Bilinear", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 480, 480, 0, 0, Instance, 0);

    if(!WindowHandle)
    {
        Win32ReportError("Could not create Window");
    }

    while(Run)
    {
        MSG Message;
        while(PeekMessage(&Message, WindowHandle, 0, 0, PM_REMOVE))
        {
            DispatchMessage(&Message);
        }
    }
}
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