param(
  [ValidateScript({ $_ -ge 100 -and $_ % 100 -eq 0 })]
  [int]$Rounds = 3000
)

$ErrorActionPreference = "Stop"
$utf8Encoding = New-Object System.Text.UTF8Encoding($false)
[Console]::OutputEncoding = $utf8Encoding
$OutputEncoding = $utf8Encoding

$mutex = New-Object System.Threading.Mutex($false, "Local\AiChat-Conversation-Adversarial")
$ownsMutex = $false

try {
  try {
    $ownsMutex = $mutex.WaitOne(0)
  } catch [System.Threading.AbandonedMutexException] {
    $ownsMutex = $true
  }

  if (!$ownsMutex) {
    Write-Host ">> Another conversation adversarial run is active; skipping overlap." -ForegroundColor Yellow
    exit 0
  }

  $root = Split-Path -Parent $PSScriptRoot
  $logRoot = Join-Path $root "logs\conversation"
  if (!(Test-Path $logRoot)) {
    New-Item -ItemType Directory -Path $logRoot -Force | Out-Null
  }

  $timestamp = Get-Date -Format "yyyyMMdd-HHmmss"
  $logFile = Join-Path $logRoot "conversation-adversarial-$timestamp.log"
  $summaryFile = Join-Path $logRoot "conversation-adversarial-$timestamp.summary.json"
  $testScript = Join-Path $root "backend\tests\conversation_adversarial_regression.php"

  Write-Host ">> Running $Rounds adversarial conversation rounds" -ForegroundColor Cyan
  & php $testScript $Rounds $summaryFile 2>&1 | ForEach-Object {
    $line = [string]$_
    Write-Host $line
    Add-Content -Path $logFile -Value $line -Encoding UTF8
  }
  $exitCode = $LASTEXITCODE

  if ($exitCode -ne 0) {
    Write-Error "Conversation adversarial test failed with exit code $exitCode. Log: $logFile"
    exit $exitCode
  }

  Write-Host ">> Conversation adversarial test passed. Log: $logFile" -ForegroundColor Green
} finally {
  if ($ownsMutex) {
    $mutex.ReleaseMutex()
  }
  $mutex.Dispose()
}