HINSTANCE win32_instance = {};

Window win32_window = {};

LRESULT CALLBACK WindowProc(HWND window, UINT message, WPARAM w_param, LPARAM l_param)
{
	LRESULT result = 0;

	switch (message)
	{
		case WM_SIZE: 
			{
				OutputDebugStringA("WM_SIZE\n");
			}	break;
		case WM_DESTROY:
			{
				OutputDebugStringA("WM_DESTROY\n");
			} break;
		case WM_CLOSE:
			{
				OutputDebugStringA("WM_CLOSE\n");
			} break;
		case WM_ACTIVATEAPP:
			{
				OutputDebugStringA("WM_ACTIVATEAPP\n");
			} break;
		default:
			{
				result = DefWindowProc(window, message, w_param, l_param);
			} break;
	}

	return result;
}

int CALLBACK WinMain(HINSTANCE instance, HINSTANCE prev_instance, LPSTR cmd_line, int show_code)
{
	win32_instance = instance;

	WNDCLASS window_class = {
		.style = CS_OWNDC|CS_HREDRAW|CS_VREDRAW,
		.lpfnWndProc = WindowProc,
		.hInstance = instance,
		.lpszClassName = "GearsWindowClass",
	};

	if (RegisterClass(&window_class))
	{
		HWND window_handle = CreateWindowEx(
			0,
			window_class.lpszClassName,
			"Video Game",
			WS_OVERLAPPEDWINDOW|WS_VISIBLE,
			CW_USEDEFAULT,
			CW_USEDEFAULT,
			CW_USEDEFAULT,
			CW_USEDEFAULT,
			0, 
			0,
			instance,
			0
		);

		if (window_handle)
		{
			while (true)
			{
				MSG message;
				BOOL message_result = GetMessage(&message, 0, 0, 0);
				if (message_result > 0)
				{
					TranslateMessage(&message);
					DispatchMessage(&message);
				}
				else
				{
					break;
				}
			}
		}
	}
}

b32 _LoadLib(const char *name, Library *out_lib)
{
	b32 success = true;

	out_lib->module = LoadLibraryA("vulkan-1.dll");
	if (!out_lib->module)
		success = false;

	return success;
}

b32 _LoadFn(const char *name, Library *lib, Function *out_fn)
{
	b32 success = true;

	out_fn->fn = GetProcAddress(lib->module, name);
	if (!out_fn->fn)
		success = false;

	return success;
}

b32 _InitPlatform()
{
	b32 success = true;

	return success;
}

rawptr _MemAlloc(isize size)
{
	return NULL;
}

rawptr _MemAllocZeroed(isize size)
{
	return NULL;
}

isize _GetPageSize()
{
	return 0;
}

i32 _EPrint(void const *str)
{
	return 0;
}

i32 _Printf(const char *fmt, ...)
{
	return 0;
}

i32 _Printfln(const char *fmt, ...)
{
	return 0;
}

i32 _EPrintf(const char *fmt, ...)
{
	return 0;
}

b32 _CreateWindow()
{
	b32 success = true;

	WNDCLASS window_class = {
		.style = CS_OWNDC|CS_HREDRAW|CS_VREDRAW,
		.lpfnWndProc = WindowProc,
		.hInstance = win32_instance,
		.lpszClassName = WINDOW_CLASS_NAME,
	};

	ATOM r_class_atom = RegisterClass(&window_class);
	if (!r_class_atom)
		success = false;

	if (success)
	{
		HWND window_handle = CreateWindowEx(
			0,
			window_class.lpszClassName,
			"Video Game",
			WS_OVERLAPPEDWINDOW|WS_VISIBLE,
			CW_USEDEFAULT,
			CW_USEDEFAULT,
			CW_USEDEFAULT,
			CW_USEDEFAULT,
			0,
			0,
			win32_instance,
			0
		);

		if (!window_handle)
			success = false;
		else
			win32_window.handle = window_handle;
	}

	return success;
}

Window *_GetWindow()
{
	return NULL;
}

b32 _GetWindowEvent(WindowEvent *event)
{
	b32 success = true;

	return success;
}

void _WaitForWindowEvent(WindowEvent *event)
{

}

WindowSize _GetWindowSize()
{
	return (WindowSize){ .w = 0, .h = 0 };
}