# civpb.com - lets two players be in the Pitboss game at the same time.
# Points the dead GameSpy "NAT negotiation" hostnames at civpb.com, which
# brokers and relays the direct connection between two players.
# What it does: back up hosts, drop older natneg lines, append ours, flush DNS.
$ErrorActionPreference = 'Stop'
$p = [Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()
if (-not $p.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
  Write-Host "Please open PowerShell or Command Prompt AS ADMINISTRATOR and run the line again." -ForegroundColor Yellow
  exit 1
}
$h = Join-Path $env:SystemRoot 'System32\drivers\etc\hosts'
Copy-Item $h "$h.civpb-backup" -Force
$keep = @(Get-Content $h | Where-Object { $_ -notmatch 'natneg' })
$add = @((Invoke-WebRequest -UseBasicParsing 'https://civpb.com/files/hosts-natneg.txt').Content -split "`n" |
        ForEach-Object { $_.Trim() } | Where-Object { $_ -and $_ -notmatch '^#' })
Set-Content -Path $h -Value ($keep + $add) -Encoding ASCII
ipconfig /flushdns | Out-Null
Write-Host "Done - civpb.com now brokers your connections to other players." -ForegroundColor Green
Write-Host "(previous hosts file saved as hosts.civpb-backup)"