# Cleanup old releases under E:\wwwroot; keep current targets only
$ErrorActionPreference = 'Stop'
$Root = 'E:\wwwroot'

function Get-JunctionTarget([string]$link) {
  if (-not (Test-Path $link)) { return $null }
  $item = Get-Item $link -Force
  if ($item.Attributes -band [IO.FileAttributes]::ReparsePoint) {
    cmd /c ("dir /AL `"$link`"") | Out-Null
    # Resolve via Get-Item Target if available
    try {
      if ($item.Target -and $item.Target.Count -gt 0) { return [string]$item.Target[0] }
    } catch {}
  }
  # Fallback: read active-release.json
  return $null
}

$ptrPath = Join-Path $Root 'ops\active-release.json'
$keepAgent = $null
$keepAdmin = $null
if (Test-Path $ptrPath) {
  $ptr = Get-Content $ptrPath -Raw | ConvertFrom-Json
  if ($ptr.agentHome) { $keepAgent = [string]$ptr.agentHome }
  if ($ptr.adminRelease) { $keepAdmin = [string]$ptr.adminRelease }
}

$agentCurrent = Join-Path $Root 'agent\current'
$adminCurrent = Join-Path $Root 'admin\current'
$t1 = Get-JunctionTarget $agentCurrent
$t2 = Get-JunctionTarget $adminCurrent
if ($t1) { $keepAgent = $t1 }
if ($t2) { $keepAdmin = $t2 }

# Resolve junction via fsutil / dir listing
function Resolve-Link([string]$p) {
  if (-not (Test-Path $p)) { return $null }
  $out = cmd /c ("fsutil reparsepoint query `"$p`"") 2>$null
  # Alternative: (Get-Item).Target
  $i = Get-Item $p -Force
  if ($i.LinkType -eq 'Junction' -or ($i.Attributes -band [IO.FileAttributes]::ReparsePoint)) {
    if ($i.Target) { return ([string]$i.Target[0]) }
  }
  return $null
}
$ka = Resolve-Link $agentCurrent
$kb = Resolve-Link $adminCurrent
if ($ka) { $keepAgent = $ka }
if ($kb) { $keepAdmin = $kb }

Write-Output ('keepAgent=' + $keepAgent)
Write-Output ('keepAdmin=' + $keepAdmin)

$removed = @()
# agent releases: E:\wwwroot\agent\releases\<id>\agent or <id>
$agentRelRoot = Join-Path $Root 'agent\releases'
if (Test-Path $agentRelRoot) {
  Get-ChildItem $agentRelRoot -ErrorAction SilentlyContinue | Where-Object { $_.PSIsContainer } | ForEach-Object {
    $rel = $_.FullName
    $agentHome = Join-Path $rel 'agent'
    $isKeep = $false
    if ($keepAgent) {
      if ($keepAgent -eq $agentHome -or $keepAgent -eq $rel -or $keepAgent.StartsWith($rel + '\')) { $isKeep = $true }
    }
    if (-not $isKeep) {
      Write-Output ('REMOVE agent ' + $rel)
      Remove-Item $rel -Recurse -Force
      $removed += $rel
    } else {
      Write-Output ('KEEP agent ' + $rel)
    }
  }
}

$adminRelRoot = Join-Path $Root 'admin\releases'
if (Test-Path $adminRelRoot) {
  Get-ChildItem $adminRelRoot -ErrorAction SilentlyContinue | Where-Object { $_.PSIsContainer } | ForEach-Object {
    $rel = $_.FullName
    $dist = Join-Path $rel 'dist'
    $isKeep = $false
    if ($keepAdmin) {
      if ($keepAdmin -eq $dist -or $keepAdmin -eq $rel -or $keepAdmin.StartsWith($rel + '\')) { $isKeep = $true }
    }
    if (-not $isKeep) {
      Write-Output ('REMOVE admin ' + $rel)
      Remove-Item $rel -Recurse -Force
      $removed += $rel
    } else {
      Write-Output ('KEEP admin ' + $rel)
    }
  }
}

# old env backups older than keep recent 2
Get-ChildItem $Root -Filter '.env.bak*' -ErrorAction SilentlyContinue | Sort-Object LastWriteTime -Descending | Select-Object -Skip 2 | ForEach-Object {
  Write-Output ('REMOVE bak ' + $_.Name)
  Remove-Item $_.FullName -Force
  $removed += $_.FullName
}

# incoming zips older
$incoming = 'C:\Users\ytd_extdev_0903\incoming'
if (Test-Path $incoming) {
  Get-ChildItem $incoming -Include '*.zip','jeecg-system-start*.jar' -ErrorAction SilentlyContinue |
    Where-Object { $_.LastWriteTime -lt (Get-Date).AddDays(-1) } |
    ForEach-Object {
      Write-Output ('REMOVE incoming ' + $_.Name)
      Remove-Item $_.FullName -Force -ErrorAction SilentlyContinue
    }
}

Write-Output ('removed_count=' + $removed.Count)
Write-Output 'CLEANUP_OK'

# ports sanity: must not touch yutongda
foreach ($x in 8080,8180,8910) {
  $c = Get-NetTCPConnection -LocalPort $x -State Listen -EA SilentlyContinue | Select-Object -First 1
  if ($c) { Write-Output ("port $x LISTEN") } else { Write-Output ("port $x down") }
}