#include <cstdio>
#include <math.h>
#include <sstream>
#include <Windows.h>
#include <string>
#include <gdiplus.h>
#include <cassert>
using std::wstring;

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

struct UserData {
	int fontSize;
	wstring str;
};

int CALLBACK WinMain(
	HINSTANCE hInstance,
	HINSTANCE hPrevInstance,
	LPSTR lpCmdLine,
	int nCmdShow
) {
	HBRUSH bckrndBrush = CreateSolidBrush(RGB(155, 89, 182));
	WNDCLASS mainWndClass = { 0 };
	mainWndClass.hInstance = hInstance;
	mainWndClass.lpszClassName = TEXT("KalyuzhinWin32_MainWindow");
	mainWndClass.lpfnWndProc = MainWindowProc;
	mainWndClass.hbrBackground = bckrndBrush;
	mainWndClass.hCursor = (HCURSOR)LoadCursor(NULL, IDC_ARROW);
	if (!RegisterClass(&mainWndClass)) {
		return 0;
	}
	int screenWeight = GetSystemMetrics(SM_CXSCREEN);
	int screenHeight = GetSystemMetrics(SM_CYSCREEN);
	int minSide = screenWeight < screenHeight ? screenWeight : screenHeight;
	int mainWindowWeight = minSide / 1.25;
	int mainWindowHeight = minSide / 1.25;

	UserData userData = UserData();
	userData.fontSize = 18;
	userData.str = L"lorem ipsum dolor sit amet";
	HWND mainHWND = CreateWindow(
		mainWndClass.lpszClassName,
		TEXT("Main"),
		WS_OVERLAPPEDWINDOW,
		screenWeight / 2 - mainWindowWeight / 2,
		screenHeight / 2 - mainWindowHeight / 2,
		mainWindowWeight,
		mainWindowHeight,
		NULL,
		NULL,
		hInstance,
		NULL);
	SetWindowLongPtr(mainHWND, GWLP_USERDATA, (LONG)&userData);
	ShowWindow(mainHWND, nCmdShow);

	MSG msg;
	while (GetMessage(&msg, NULL, 0, 0)) {
		DispatchMessage(&msg);
	}
	return msg.wParam;
}

void HandleSysCommand(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{

}

LRESULT CALLBACK MainWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	PAINTSTRUCT ps;
	HDC hdc;
	static int angle = 0;
	switch (uMsg) {
	case WM_CREATE: {
		HMENU hSysMenu = GetSystemMenu(hwnd, false);

		int cnt = GetMenuItemCount(hSysMenu);
		for (int i = 0; i < cnt; ++i) {
			MENUITEMINFO closeItem;
			GetMenuItemInfo(hSysMenu, i, TRUE, &closeItem);
			std::stringstream asd;
			asd << closeItem.wID << "\n";
			OutputDebugString(asd.str().c_str());
		}
		ModifyMenu(GetSystemMenu(hwnd, FALSE), SC_CLOSE, MF_BYCOMMAND, 100500, "Закрыть");
		DrawMenuBar(hwnd);
		break;
	}
	case WM_COMMAND: {

		break;
	}
	case WM_SYSCOMMAND: {
		if (wParam == 100500) {
			DestroyWindow(hwnd);
			break;
		}
		if (wParam == 61536) {
			WORD xPos = LOWORD(lParam);
			WORD yPos = HIWORD(lParam);
			if (xPos != 0 && yPos != 0)
				return 0;
		}
		return DefWindowProc(hwnd, uMsg, wParam, lParam);
		break;
	}
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hwnd, uMsg, wParam, lParam);
	}
	return 0;
}