$ErrorActionPreference = 'Stop'

$repositoryRoot = Split-Path -Parent $PSScriptRoot
$skillName = 'upload-delivery-desk-work'
$sourcePath = Join-Path $repositoryRoot ".agents\skills\$skillName"
$packageDirectory = Join-Path $repositoryRoot 'skill-packages'
$packagePath = Join-Path $packageDirectory "$skillName.zip"

if (-not (Test-Path -LiteralPath (Join-Path $sourcePath 'SKILL.md'))) {
  throw "Skill not found: $sourcePath"
}

$previousNoBytecode = $env:PYTHONDONTWRITEBYTECODE
try {
  $env:PYTHONDONTWRITEBYTECODE = '1'
  python (Join-Path $repositoryRoot 'tests\test_upload_skill.py')
  if ($LASTEXITCODE -ne 0) {
    throw 'Upload Skill regression tests failed.'
  }
} finally {
  $env:PYTHONDONTWRITEBYTECODE = $previousNoBytecode
}

$runtimeFiles = Get-ChildItem -LiteralPath $sourcePath -Recurse -Force | Where-Object {
  $_.Name -eq '__pycache__' -or $_.Extension -in @('.pyc', '.pyo')
}
if ($runtimeFiles) {
  throw 'Skill contains Python runtime cache. Remove it before packaging.'
}

New-Item -ItemType Directory -Force -Path $packageDirectory | Out-Null
if (Test-Path -LiteralPath $packagePath) {
  Remove-Item -LiteralPath $packagePath -Force
}

Add-Type -AssemblyName System.IO.Compression.FileSystem
[System.IO.Compression.ZipFile]::CreateFromDirectory(
  $sourcePath,
  $packagePath,
  [System.IO.Compression.CompressionLevel]::Optimal,
  $false
)

$archive = [System.IO.Compression.ZipFile]::OpenRead($packagePath)
try {
  $entries = @($archive.Entries | ForEach-Object { $_.FullName.Replace('\', '/') })
  if ($entries -notcontains 'SKILL.md') {
    throw 'Packaged Skill must contain SKILL.md at the ZIP root.'
  }
  if ($entries | Where-Object { $_ -like "$skillName/*" }) {
    throw 'Packaged Skill contains an extra top-level directory.'
  }
} finally {
  $archive.Dispose()
}

Write-Output $packagePath