steps:
  - name: Configure Core RDP Settings
    run: |
      # Enable Remote Desktop and disable Network Level Authentication (if needed)
      Set-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\Terminal Server' `
                         -Name "fDenyTSConnections" -Value 0 -Force
      Set-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp' `
                         -Name "UserAuthentication" -Value 0 -Force
      Set-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp' `
                         -Name "SecurityLayer" -Value 0 -Force

      # Remove any existing rule with the same name to avoid duplication
      netsh advfirewall firewall delete rule name="RDP-Tailscale"
      
      # For testing, allow any incoming connection on port 3389
      netsh advfirewall firewall add rule name="RDP-Tailscale" `
        dir=in action=allow protocol=TCP localport=3389

      # (Optional) Restart the Remote Desktop service to ensure changes take effect
      Restart-Service -Name TermService -Force

  - name: Create RDP User with Secure Password
    run: |
      Add-Type -AssemblyName System.Security
      $charSet = @{
          Upper   = [char[]](65..90)      # A-Z
          Lower   = [char[]](97..122)     # a-z
          Number  = [char[]](48..57)      # 0-9
          Special = ([char[]](33..47) + [char[]](58..64) +
                     [char[]](91..96) + [char[]](123..126)) # Special characters
      }
      $rawPassword = @()
      $rawPassword += $charSet.Upper | Get-Random -Count 4
      $rawPassword += $charSet.Lower | Get-Random -Count 4
      $rawPassword += $charSet.Number | Get-Random -Count 4
      $rawPassword += $charSet.Special | Get-Random -Count 4
      $password = -join ($rawPassword | Sort-Object { Get-Random })
      $securePass = ConvertTo-SecureString $password -AsPlainText -Force
      New-LocalUser -Name "RDP" -Password $securePass -AccountNeverExpires
      Add-LocalGroupMember -Group "Administrators" -Member "RDP"
      Add-LocalGroupMember -Group "Remote Desktop Users" -Member "RDP"
      
      echo "RDP_CREDS=User: RDP | Password: $password" >> $env:GITHUB_ENV
      
      if (-not (Get-LocalUser -Name "RDP")) {
          Write-Error "User creation failed"
          exit 1
      }

  - name: Install Tailscale
    run: |
      $tsUrl = "https://pkgs.tailscale.com/stable/tailscale-setup-1.82.0-amd64.msi"
      $installerPath = "$env:TEMP\tailscale.msi"
      
      Invoke-WebRequest -Uri $tsUrl -OutFile $installerPath
      Start-Process msiexec.exe -ArgumentList "/i", "`"$installerPath`"", "/quiet", "/norestart" -Wait
      Remove-Item $installerPath -Force

  - name: Establish Tailscale Connection
    run: |
      # Bring up Tailscale with the provided auth key and set a unique hostname
      & "$env:ProgramFiles\Tailscale\tailscale.exe" up --authkey=${{ secrets.TAILSCALE_AUTH_KEY }} --hostname=gh-runner-$env:GITHUB_RUN_ID
      
      # Wait for Tailscale to assign an IP
      $tsIP = $null
      $retries = 0
      while (-not $tsIP -and $retries -lt 10) {
          $tsIP = & "$env:ProgramFiles\Tailscale\tailscale.exe" ip -4
          Start-Sleep -Seconds 5
          $retries++
      }
      
      if (-not $tsIP) {
          Write-Error "Tailscale IP not assigned. Exiting."
          exit 1
      }
      echo "TAILSCALE_IP=$tsIP" >> $env:GITHUB_ENV
  
  - name: Verify RDP Accessibility
    run: |
      Write-Host "Tailscale IP: $env:TAILSCALE_IP"
      
      # Test connectivity using Test-NetConnection against the Tailscale IP on port 3389
      $testResult = Test-NetConnection -ComputerName $env:TAILSCALE_IP -Port 3389
      if (-not $testResult.TcpTestSucceeded) {
          Write-Error "TCP connection to RDP port 3389 failed"
          exit 1
      }
      Write-Host "TCP connectivity successful!"

  - name: Maintain Connection
    run: |
      Write-Host "`n=== RDP ACCESS ==="
      Write-Host "Address: $env:TAILSCALE_IP"
      Write-Host "Username: RDP"
      Write-Host "Password: $(echo $env:RDP_CREDS)"
      Write-Host "==================`n"
      
      # Keep runner active indefinitely (or until manually cancelled)
      while ($true) {
          Write-Host "[$(Get-Date)] RDP Active - Use Ctrl+C in workflow to terminate"
          Start-Sleep -Seconds 300
      }