$ErrorActionPreference = "Stop"
$Incoming = "C:\Users\ytd_extdev_0903\incoming\ai.conf.cutover-8910"
$Ai = "C:\nginx-1.18.0\myconf\ai.conf"
$Stamp = Get-Date -Format "yyyyMMdd-HHmmss"

if (-not (Test-Path $Incoming)) { throw "missing incoming conf" }
Copy-Item $Ai "$Ai.bak-before-ascii-$Stamp" -Force

$bytes = [System.IO.File]::ReadAllBytes($Incoming)
if ($bytes.Length -ge 3 -and $bytes[0] -eq 239 -and $bytes[1] -eq 187 -and $bytes[2] -eq 191) {
  $list = New-Object System.Collections.Generic.List[byte]
  for ($i = 3; $i -lt $bytes.Length; $i++) { [void]$list.Add($bytes[$i]) }
  $bytes = $list.ToArray()
}
[System.IO.File]::WriteAllBytes($Ai, $bytes)
Write-Output "WROTE_AI_CONF_NO_BOM"

Set-Location "C:\nginx-1.18.0"
& .\nginx.exe -t
if ($LASTEXITCODE -ne 0) { throw "nginx -t failed" }

Get-Process nginx -ErrorAction SilentlyContinue | Stop-Process -Force -ErrorAction SilentlyContinue
Start-Sleep -Seconds 1

$started = $false
try {
  Start-Service Nginx1.18 -ErrorAction Stop
  Start-Sleep -Seconds 2
  if ((Get-Service Nginx1.18).Status -eq "Running") {
    $started = $true
    Write-Output "SERVICE_RUNNING"
  }
} catch {
  Write-Output "SERVICE_FAIL"
}

if (-not $started) {
  Start-Process -FilePath "C:\nginx-1.18.0\nginx.exe" -WorkingDirectory "C:\nginx-1.18.0" -WindowStyle Hidden
  Start-Sleep -Seconds 2
  if (-not (Get-Process nginx -ErrorAction SilentlyContinue)) { throw "nginx still not running" }
  Write-Output "EXE_RUNNING"
}

Get-Service Nginx1.18 | Format-List Name, Status
Get-Process nginx | Select-Object Id | Format-Table -AutoSize
cmd /c "curl.exe -sk -H `"Host: ai.ytd-scm.com`" https://127.0.0.1/agent/health"
Write-Output ""
cmd /c "curl.exe -sk -o NUL -w root:%{http_code} -H `"Host: ai.ytd-scm.com`" https://127.0.0.1/"
Write-Output ""
Write-Output "NGINX_FIXED"