$outFile = $args[0]
if (-not $outFile) { $outFile = Join-Path $env:TEMP 'noconsole-probe.txt' }
$lines = New-Object System.Collections.Generic.List[string]
function L($s) { $lines.Add($s); Write-Host $s }
$src = @"
using System;
using System.Runtime.InteropServices;
public static class K32b {
  [DllImport("kernel32.dll", SetLastError=true)] public static extern bool AllocConsole();
  [DllImport("kernel32.dll", SetLastError=true)] public static extern bool FreeConsole();
  [DllImport("kernel32.dll")] public static extern IntPtr GetStdHandle(int n);
  [DllImport("kernel32.dll", SetLastError=true)] public static extern bool GetConsoleMode(IntPtr h, out uint m);
  [DllImport("kernel32.dll", SetLastError=true)] public static extern bool SetConsoleMode(IntPtr h, uint m);
  [DllImport("kernel32.dll")] public static extern IntPtr GetConsoleWindow();
  [DllImport("kernel32.dll")] public static extern uint GetConsoleOutputCP();
}
"@
Add-Type -TypeDefinition $src -ErrorAction Stop
L "##### PART A: no console attached (stdout redirected) #####"
L ("PSVersion                : " + $PSVersionTable.PSVersion)
L ("IsOutputRedirected       : " + [Console]::IsOutputRedirected)
L ("GetConsoleWindow         : 0x{0:X}" -f ([K32b]::GetConsoleWindow().ToInt64()))
L ("Host.UI.SupportsVirtualTerminal (property exists? " + [bool]($Host.UI | Get-Member -Name SupportsVirtualTerminal -ErrorAction SilentlyContinue) + ") = " + [string]$Host.UI.SupportsVirtualTerminal)
L ("RawUI has SupportsVirtualTerminal? " + [bool]($Host.UI.RawUI | Get-Member -Name SupportsVirtualTerminal -ErrorAction SilentlyContinue))
$m = 0; $ok = [K32b]::GetConsoleMode([K32b]::GetStdHandle(-11), [ref]$m); $err = [Runtime.InteropServices.Marshal]::GetLastWin32Error()
L ("GetConsoleMode(STDOUT)   : $ok  mode=0x{0:X}  lastErr=$err" -f $m)
L ("--- try to wrap POSIX bytes (what Set-Item Function:Write-Output would do) ---")
try { $b = [System.Text.Encoding]::UTF8.GetBytes("x")[0]; $os = [Console]::OpenStandardOutput(); $os.WriteByte(0x1B); $os.Flush(); L "OpenStandardOutput().WriteByte(0x1B): OK (wrote raw ESC into redirected stdout)" } catch { L ("OpenStandardOutput().WriteByte THREW: " + $_.Exception.Message) }
try { [Console]::SetCursorPosition(3,3); L ("[Console]::SetCursorPosition(3,3) : OK -> " + [Console]::CursorLeft + "," + [Console]::CursorTop) } catch { L ("[Console]::SetCursorPosition(3,3) THREW: " + $_.Exception.Message) }
try { $w = $Host.UI.RawUI.WindowSize; L ("RawUI.WindowSize         : " + $w.Width + 'x' + $w.Height) } catch { L ("RawUI.WindowSize THREW: " + $_.Exception.Message) }
try { L ("RawUI.ForegroundColor    : " + [string]$Host.UI.RawUI.ForegroundColor) } catch { L ("RawUI.ForegroundColor THREW: " + $_.Exception.Message) }
try { [Console]::ForegroundColor = 'Red'; L ("[Console]::ForegroundColor setter : OK (no throw)") } catch { L ("[Console]::ForegroundColor setter THREW: " + $_.Exception.Message) }
try { [Console]::Title = 'probe'; L "[Console]::Title setter : OK (no throw)" } catch { L ("[Console]::Title setter THREW: " + $_.Exception.Message) }
L ("[Console]::OutputEncoding : " + [Console]::OutputEncoding.WebName + "  (CodePage " + [Console]::OutputEncoding.CodePage + ")")
L ("`$OutputEncoding          : " + $OutputEncoding.WebName)
L ("chcp (GetConsoleOutputCP) : " + [K32b]::GetConsoleOutputCP())
try { L ("`$TypingCompletion / TabExpansion2 n/a") } catch {}
L ""
L "##### PART B: AllocConsole() -- now attached to a brand new console #####"
$alloc = [K32b]::AllocConsole()
L ("AllocConsole() returned  : " + $alloc)
[Console]::SetOut([System.IO.StreamWriter]::new([Console]::OpenStandardOutput(), [Console]::OutputEncoding)) 2>$null
L ("GetConsoleWindow         : 0x{0:X}" -f ([K32b]::GetConsoleWindow().ToInt64()))
$m2 = 0; $ok2 = [K32b]::GetConsoleMode([K32b]::GetStdHandle(-11), [ref]$m2)
L ("GetConsoleMode(STDOUT)   : $ok2  mode=0x{0:X}" -f $m2)
L ("  ENABLE_VIRTUAL_TERMINAL_PROCESSING (0x4) : " + (($m2 -band 4) -eq 4))
L ("  ENABLE_PROCESSED_OUTPUT (0x1)            : " + (($m2 -band 1) -eq 1))
$ok3 = [K32b]::SetConsoleMode([K32b]::GetStdHandle(-11), $m2 -band (-bnot 4))
$m3 = 0; [void][K32b]::GetConsoleMode([K32b]::GetStdHandle(-11), [ref]$m3)
L ("After SetConsoleMode(mode AND NOT 0x4) -> " + $ok3 + " mode=0x{0:X}" -f $m3)
L ("  VT now off? " + ((($m3 -band 4) -eq 0)))
[void][K32b]::SetConsoleMode([K32b]::GetStdHandle(-11), $m3 -bor 4)
$m4 = 0; [void][K32b]::GetConsoleMode([K32b]::GetStdHandle(-11), [ref]$m4)
L ("After re-enabling 0x4     -> mode=0x{0:X}" -f $m4)
L ("GetConsoleOutputCP now    : " + [K32b]::GetConsoleOutputCP())
try { L ("RawUI.WindowSize now      : " + $Host.UI.RawUI.WindowSize.Width + 'x' + $Host.UI.RawUI.WindowSize.Height) } catch { L ("RawUI.WindowSize THREW: " + $_.Exception.Message) }
[System.IO.File]::WriteAllLines($outFile, $lines, (New-Object System.Text.UTF8Encoding($false)))
[void][K32b]::FreeConsole()