using System;
using System.Runtime.InteropServices;

public static class DisplayFusionFunction
{
    private const int GWL_STYLE = -16;
    private const int WS_CAPTION = 0x00C00000;
    private const int SWP_FRAMECHANGED = 0x0020;
    private const int SWP_NOMOVE = 0x0002;
    private const int SWP_NOSIZE = 0x0001;
    private const int SWP_NOZORDER = 0x0004;

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

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

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

    public static void Run(IntPtr windowHandle)
    {
        // Check for valid window handle
        if (windowHandle == IntPtr.Zero)
        {
            BFS.Dialog.ShowMessageInfo("No valid window handle provided.");
            return;
        }

        // Remove the caption style
        int style = GetWindowLong(windowHandle, GWL_STYLE);
        style &= ~WS_CAPTION;
        SetWindowLong(windowHandle, GWL_STYLE, style);

        // Update the window so changes are visible
        SetWindowPos(
            windowHandle,
            IntPtr.Zero,
            0, 0, 0, 0,
            SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER
        );

        // Log a success message instead of showing a dialog
        // BFS.Log.Info("Title bar removed on the selected window!");
    }
}