using System.CodeDom.Compiler;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

namespace LLib.ImGui;

public static class WindowFlash
{
	private struct FLASHWINFO
	{
		public uint cbSize;

		public nint hwnd;

		public uint dwFlags;

		public uint uCount;

		public uint dwTimeout;
	}

	private const uint FLASHW_ALL = 3u;

	private const uint FLASHW_TIMERNOFG = 12u;

	[LibraryImport("user32.dll")]
	[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
	[GeneratedCode("Microsoft.Interop.LibraryImportGenerator", "10.0.14.37416")]
	[SkipLocalsInit]
	[return: MarshalAs(UnmanagedType.Bool)]
	private unsafe static bool FlashWindowEx(ref FLASHWINFO pwfi)
	{
		int num;
		fixed (FLASHWINFO* _pwfi_native = &pwfi)
		{
			num = __PInvoke(_pwfi_native);
		}
		return num != 0;
		[DllImport("user32.dll", EntryPoint = "FlashWindowEx", ExactSpelling = true)]
		[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
		static extern unsafe int __PInvoke(FLASHWINFO* __pwfi_native);
	}

	public static void Flash(nint hwnd, uint count = 3u)
	{
		int num = ((hwnd != 0) ? (-1584485795) : (-1584485796));
		while (true)
		{
			int num2 = num;
			int num3 = -1584485795;
			int num4 = num2;
			int num5 = num4 + num3;
			int num6 = num4 & num3;
			switch (num5 - (num6 + num6))
			{
			case 0:
			{
				FLASHWINFO pwfi = new FLASHWINFO
				{
					cbSize = (uint)Marshal.SizeOf<FLASHWINFO>(),
					hwnd = hwnd,
					dwFlags = ((count == 0) ? 15u : 3u),
					uCount = count,
					dwTimeout = 0u
				};
				FlashWindowEx(ref pwfi);
				return;
			}
			case 1:
				return;
			case 2:
				goto IL_0093;
			}
			continue;
			IL_0093:
			num = -1584485796;
		}
	}
}