using System;
using System.Runtime.InteropServices;
using UnityEngine;

public class WindowMod : MonoBehaviour
{
	public Rect screenPosition;

	public static DEVMODE startMode = default(DEVMODE);

	public const int ENUM_CURRENT_SETTINGS = -1;

	public const int CDS_UPDATEREGISTRY = 1;

	public const int CDS_TEST = 2;

	public const int DISP_CHANGE_SUCCESSFUL = 0;

	public const int DISP_CHANGE_RESTART = 1;

	public const int DISP_CHANGE_FAILED = -1;

	public const int DISP_CHANGE_BADMODE = -2;

	private const uint SWP_SHOWWINDOW = 64u;

	private const int GWL_STYLE = -16;

	private const int WS_BORDER = 1;

	private const int WS_OVERLAPPED = 0;

	[DllImport("user32.dll")]
	private static extern IntPtr SetWindowLong(IntPtr hwnd, int _nIndex, int dwNewLong);

	[DllImport("user32.dll")]
	private static extern bool SetWindowPos(IntPtr hWnd, int hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);

	[DllImport("user32.dll")]
	private static extern IntPtr GetForegroundWindow();

	[DllImport("User32.dll")]
	[return: MarshalAs(UnmanagedType.Bool)]
	public static extern bool EnumDisplaySettings([MarshalAs(UnmanagedType.LPTStr)] string lpszDeviceName, [MarshalAs(UnmanagedType.U4)] int iModeNum, [In][Out] ref DEVMODE lpDevMode);

	[DllImport("User32.dll")]
	[return: MarshalAs(UnmanagedType.I4)]
	public static extern int ChangeDisplaySettings([In][Out] ref DEVMODE lpDevMode, [MarshalAs(UnmanagedType.U4)] uint dwflags);

	public void SetBorders()
	{
		SetWindowLong(GetForegroundWindow(), -16, 0);
		bool flag = SetWindowPos(GetForegroundWindow(), 0, (int)screenPosition.x, (int)screenPosition.y, (int)screenPosition.width, (int)screenPosition.height, 64u);
	}

	public void SetBorderless()
	{
		SetWindowLong(GetForegroundWindow(), -16, 1);
		bool flag = SetWindowPos(GetForegroundWindow(), 0, (int)screenPosition.x, (int)screenPosition.y, (int)screenPosition.width, (int)screenPosition.height, 64u);
	}

	public static void SaveStartMode()
	{
		Debug.Log("SaveStartMode");
		EnumDisplaySettings(null, -1, ref startMode);
	}

	public static void LoadStartMode()
	{
		DEVMODE currentSettings = GetCurrentSettings();
		Debug.Log("LoadStartMode: " + currentSettings.dmPelsWidth + " " + startMode.dmPelsWidth + " " + currentSettings.dmPelsHeight + " " + startMode.dmPelsHeight);
		if (currentSettings.dmPelsWidth != startMode.dmPelsWidth || currentSettings.dmPelsHeight != startMode.dmPelsHeight)
		{
			ChangeDisplaySettings((int)startMode.dmPelsWidth, (int)startMode.dmPelsHeight);
		}
	}

	public static void ChangeDisplaySettings(int width, int height)
	{
		DEVMODE lpDevMode = default(DEVMODE);
		lpDevMode.dmSize = (ushort)Marshal.SizeOf(lpDevMode);
		EnumDisplaySettings(null, -1, ref lpDevMode);
		DEVMODE lpDevMode2 = lpDevMode;
		lpDevMode2.dmPelsWidth = (uint)width;
		lpDevMode2.dmPelsHeight = (uint)height;
		int num = ChangeDisplaySettings(ref lpDevMode2, 0u);
		switch (num)
		{
		case 0:
			Debug.Log("Succeeded.\n");
			GetCurrentSettings();
			break;
		case -2:
			Debug.Log("Mode not supported.");
			break;
		case 1:
			Debug.Log("Restart required.");
			break;
		default:
			Debug.Log("Failed. Error code = " + num);
			break;
		}
	}

	public static void EnumerateSupportedModes()
	{
		DEVMODE lpDevMode = default(DEVMODE);
		lpDevMode.dmSize = (ushort)Marshal.SizeOf(lpDevMode);
		int i = 0;
		Debug.Log("Supported Modes:");
		for (; EnumDisplaySettings(null, i, ref lpDevMode); i++)
		{
			Debug.Log(string.Format("\t{0} by {1}, {2} bit, {3} degrees, {4} hertz", lpDevMode.dmPelsWidth, lpDevMode.dmPelsHeight, lpDevMode.dmBitsPerPel, lpDevMode.dmDisplayOrientation * 90, lpDevMode.dmDisplayFrequency));
		}
	}

	public static DEVMODE GetCurrentSettings()
	{
		DEVMODE lpDevMode = default(DEVMODE);
		lpDevMode.dmSize = (ushort)Marshal.SizeOf(lpDevMode);
		if (EnumDisplaySettings(null, -1, ref lpDevMode))
		{
			Debug.Log(string.Format("Current Mode:\n\t{0} by {1}, {2} bit, {3} degrees, {4} hertz", lpDevMode.dmPelsWidth, lpDevMode.dmPelsHeight, lpDevMode.dmBitsPerPel, lpDevMode.dmDisplayOrientation * 90, lpDevMode.dmDisplayFrequency));
		}
		return lpDevMode;
	}
}