#ifndef UNICODE
#define UNICODE
#endif

#include <windows.h>
HWND hwnd, hwnd_2, hwnd_3, hwnd_4;
int counter = 0, ScreenX, ScreenY;

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

void Change_pos_after_lbd()
{
	int dividedheight = ScreenY / 2;//dziele wysokosc by uzyskac rozmiar Y zeby zakryc caly ekran
	int dividedwidth = ScreenX / 2;//dziele szerokosc by uzyskac rozmiar Y zeby zakryc caly ekran
	//MoveWindow(uchwyt, posX, posY, rozmiarX, rozmiarY, BOOL);
	MoveWindow(hwnd, 0, 0, dividedwidth, dividedheight, TRUE);
	ShowWindow(hwnd, SW_SHOW);
	UpdateWindow(hwnd);
	MoveWindow(hwnd_2, ScreenX - dividedwidth, ScreenY - dividedheight, dividedwidth, dividedheight, TRUE);
	ShowWindow(hwnd_2, SW_SHOW);
	UpdateWindow(hwnd_2);
	MoveWindow(hwnd_3, ScreenX - dividedwidth, 0, dividedwidth, dividedheight, TRUE);
	ShowWindow(hwnd_3, SW_SHOW);
	UpdateWindow(hwnd_3);
	MoveWindow(hwnd_4, 0, ScreenY - dividedheight, dividedwidth, dividedheight, TRUE);
	ShowWindow(hwnd_4, SW_SHOW);
	UpdateWindow(hwnd_4);
}

void Change_pos_after_rbd()
{
	int dividedheight = ScreenY / 4; //dziele wysokosc by uzyskac rozmiar Y zeby zakryc caly ekran

	MoveWindow(hwnd, 0, 0, ScreenX, dividedheight, TRUE);
	ShowWindow(hwnd, SW_SHOW);
	UpdateWindow(hwnd);
	MoveWindow(hwnd_2, 0, dividedheight, ScreenX, dividedheight, TRUE);
	ShowWindow(hwnd_2, SW_SHOW);
	UpdateWindow(hwnd_2);
	MoveWindow(hwnd_3, 0, dividedheight * 2, ScreenX, dividedheight, TRUE);
	ShowWindow(hwnd_3, SW_SHOW);
	UpdateWindow(hwnd_3);
	MoveWindow(hwnd_4, 0, dividedheight * 3, ScreenX, dividedheight, TRUE);
	ShowWindow(hwnd_4, SW_SHOW);
	UpdateWindow(hwnd_4);
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR pCmdLine, int nCmdShow) {
	//Zarejestrowanie okna
	const wchar_t CLASS_NAME[] = L"Moje okno";
	ScreenX = GetSystemMetrics(SM_CXSCREEN); //Pobranie szerokosci ekranu
	ScreenY = GetSystemMetrics(SM_CYSCREEN); //Pobranie wysokosci ekranu

	WNDCLASSEX wc = { 0 };

	wc.cbSize = sizeof(WNDCLASSEX);
	wc.lpfnWndProc = WindowProc;
	wc.hInstance = hInstance;
	wc.lpszClassName = CLASS_NAME;
	wc.lpszMenuName = NULL;
	wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);

	if (!RegisterClassEx(&wc))
	{
		MessageBox(NULL, TEXT("blad rejestracji"), TEXT("Tytul"), MB_OK);
	}
	//Stworzenie Okna
	hwnd = CreateWindowEx(0, CLASS_NAME, L"HEJ, JESTEM OKNO", WS_OVERLAPPEDWINDOW,
		/*Rozmiar i pozycja*/ CW_USEDEFAULT, CW_USEDEFAULT, 400, 400, 0, //Ojciec
		0, //Menu
		hInstance, //uchwyt Instancji
		0 //Dodatkowe dane aplikacji
	);
	counter++;
	hwnd_2 = CreateWindowEx(0, CLASS_NAME, L"HEJ, JESTEM OKNO", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 400, 400, 0, 0, hInstance, 0);
	counter++;
	hwnd_3 = CreateWindowEx(0, CLASS_NAME, L"HEJ, JESTEM OKNO", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 400, 400, 0, 0, hInstance, 0);
	counter++;
	hwnd_4 = CreateWindowEx(0, CLASS_NAME, L"HEJ, JESTEM OKNO", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 400, 400, 0, 0, hInstance, 0);
	counter++;

	if (hwnd == NULL)
	{
		MessageBox(NULL, TEXT("blad tworzenia okna"), TEXT("Tytul"), MB_OK);
		UnregisterClass(CLASS_NAME, hInstance);
		return 0;
	}
	ShowWindow(hwnd, nCmdShow);
	UpdateWindow(hwnd);

	ShowWindow(hwnd_2, nCmdShow);
	UpdateWindow(hwnd_2);

	ShowWindow(hwnd_3, nCmdShow);
	UpdateWindow(hwnd_3);

	ShowWindow(hwnd_4, nCmdShow);
	UpdateWindow(hwnd_4);

	MSG msg = {};
	while (GetMessage(&msg, 0, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}

	UnregisterClass(CLASS_NAME, hInstance);
	return 0;
}

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	switch (uMsg)
	{
	case WM_LBUTTONDOWN:
		Change_pos_after_lbd();
		break;

	case WM_RBUTTONDOWN:
		Change_pos_after_rbd();
		break;

	case WM_CLOSE:
		counter--;
		if (MessageBox(hwnd, TEXT("Czy na pewno chcesz zamknąć?"), TEXT("Pytanie"), MB_YESNO | MB_ICONQUESTION) == IDYES)
		{
			DestroyWindow(hwnd);
		}
		break;

	case WM_DESTROY:
		if (counter == 0)
		{
			MessageBox(hwnd, TEXT("Koniec Dzialania aplikacji!"), TEXT("Koniec"), MB_OK | MB_ICONSTOP);
			PostQuitMessage(0);
		}
		break;

	default:
		return DefWindowProc(hwnd, uMsg, wParam, lParam);
	}
}