# Connect to the SKYNET BBS from Windows 11 PowerShell.
# Run: irm https://ligand.su/skynet/windows/connect-bbs.ps1 | iex
$ErrorActionPreference = 'Stop'

function Find-Ssh {
    $command = Get-Command ssh.exe -ErrorAction SilentlyContinue
    if ($command) { return $command.Source }

    $systemSsh = Join-Path $env:WINDIR 'System32\OpenSSH\ssh.exe'
    if (Test-Path -LiteralPath $systemSsh -PathType Leaf) { return $systemSsh }
    return $null
}

$ssh = Find-Ssh
if (-not $ssh) {
    $identity = [Security.Principal.WindowsIdentity]::GetCurrent()
    $principal = [Security.Principal.WindowsPrincipal]::new($identity)
    $isAdmin = $principal.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)

    if (-not $isAdmin) {
        Write-Host 'OpenSSH Client is missing. Approve the Windows administrator prompt to install it.'
        $installCommand = '$ErrorActionPreference = "Stop"; try { Add-WindowsCapability -Online -Name "OpenSSH.Client~~~~0.0.1.0" | Out-Null; exit 0 } catch { Write-Error $_; exit 1 }'
        $encodedCommand = [Convert]::ToBase64String([Text.Encoding]::Unicode.GetBytes($installCommand))
        $installer = Start-Process -FilePath 'powershell.exe' -ArgumentList @('-NoProfile', '-EncodedCommand', $encodedCommand) -Verb RunAs -Wait -PassThru
        if ($installer.ExitCode -ne 0) { throw "OpenSSH Client installation failed or was cancelled (exit code $($installer.ExitCode))." }
    }
    else {
        $capability = Get-WindowsCapability -Online -Name 'OpenSSH.Client~~~~0.0.1.0'
        if ($capability.State -ne 'Installed') {
            Write-Host 'Installing Windows OpenSSH Client...'
            $result = Add-WindowsCapability -Online -Name 'OpenSSH.Client~~~~0.0.1.0'
            if ($result.RestartNeeded) { Write-Warning 'Windows reports that a restart is needed before OpenSSH Client can be used.' }
        }
    }
    $ssh = Find-Ssh
    if (-not $ssh) { throw 'OpenSSH Client is still unavailable. Restart Windows if prompted, then try again.' }
}

Write-Host 'Connecting to SKYNET BBS at ligand.su:2223...'
& $ssh -p 2223 'new@ligand.su'
if ($LASTEXITCODE -ne 0) { throw "SSH exited with code $LASTEXITCODE." }