/*
 * Copyright (c) 2020 ETH Zürich, Educational Development and Technology (LET)
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

using System;
using System.Runtime.InteropServices;

namespace SafeExamBrowser.ResetUtility
{
	internal class NativeMethods
	{
		private const int GWL_STYLE = -16;
		private const int MF_BYCOMMAND = 0x0;
		private const int SC_MAXIMIZE = 0xF030;
		private const int SC_MINIMIZE = 0xF020;
		private const int SC_SIZE = 0xF000;
		private const int WS_MAXIMIZEBOX = 0x10000;
		private const int WS_MINIMIZEBOX = 0x20000;

		internal void TryDisableSystemMenu()
		{
			try
			{
				// DeleteMenu(GetSystemMenu(GetConsoleWindow(), false), SC_MINIMIZE, MF_BYCOMMAND);
				DeleteMenu(GetSystemMenu(GetConsoleWindow(), false), SC_MAXIMIZE, MF_BYCOMMAND);
				DeleteMenu(GetSystemMenu(GetConsoleWindow(), false), SC_SIZE, MF_BYCOMMAND);
				// SetWindowLong(GetConsoleWindow(), GWL_STYLE, GetWindowLong(GetConsoleWindow(), GWL_STYLE) & ~WS_MINIMIZEBOX);
				SetWindowLong(GetConsoleWindow(), GWL_STYLE, GetWindowLong(GetConsoleWindow(), GWL_STYLE) & ~WS_MAXIMIZEBOX);
			}
			catch(Exception) { }
		}

		[DllImport("user32.dll")]
		private static extern int DeleteMenu(IntPtr hMenu, int nPosition, int wFlags);

		[DllImport("kernel32.dll")]
		private static extern IntPtr GetConsoleWindow();

		[DllImport("user32.dll")]
		private static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);

		[DllImport("user32.dll")]
		private static extern int GetWindowLong(IntPtr hWnd, int nIndex);

		[DllImport("user32.dll")]
		private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
	}
}
