$ErrorActionPreference = 'Stop'

$runtimeDir = Join-Path (Join-Path $env:LOCALAPPDATA 'SSHManager') 'runtime'
$pidFile = Join-Path $runtimeDir 'app.pid'

if (-not (Test-Path $pidFile)) {
  Write-Output 'SSH Manager 当前未运行。'
  exit 0
}

$rawPid = Get-Content -Path $pidFile -Raw
$pidInfo = $null

try {
  $pidInfo = $rawPid | ConvertFrom-Json
} catch {
  $legacyPid = 0
  if ([int]::TryParse($rawPid, [ref]$legacyPid)) {
    $pidInfo = @{
      pid = $legacyPid
      startedAt = 0
    }
  }
}

if (-not $pidInfo) {
  Remove-Item -Path $pidFile -Force -ErrorAction SilentlyContinue
  Write-Output '已清理无效 PID 文件。'
  exit 0
}

$process = Get-Process -Id ([int]$pidInfo.pid) -ErrorAction SilentlyContinue
if (-not $process) {
  Remove-Item -Path $pidFile -Force -ErrorAction SilentlyContinue
  Write-Output 'SSH Manager 当前未运行。'
  exit 0
}

if ($pidInfo.startedAt -and $process.StartTime) {
  $processStartedAt = ([DateTimeOffset]$process.StartTime).ToUnixTimeMilliseconds()
  if ($processStartedAt -ne [int64]$pidInfo.startedAt) {
    Remove-Item -Path $pidFile -Force -ErrorAction SilentlyContinue
    Write-Output '已清理过期 PID 文件，未停止任何进程。'
    exit 0
  }
}

Stop-Process -Id ([int]$pidInfo.pid) -Force
Remove-Item -Path $pidFile -Force -ErrorAction SilentlyContinue
Write-Output 'SSH Manager 已停止。'