param(
  [ValidateSet('Open', 'List', 'RefreshLetterBomb')]
  [string]$Action = 'Open',

  [string]$MacAddress = '02:00:00:43:18:01',

  [ValidateSet('E', 'U', 'J', 'K')]
  [string]$Region = 'E'
)

$repoRoot = Split-Path -Parent $MyInvocation.MyCommand.Path
$sdFolder = Join-Path $repoRoot 'Virtual-SD'
$generator = Join-Path $repoRoot 'Tools\Generate-LetterBomb.py'
$runningDolphin = Get-Process -Name DolphinNoGUI,Dolphin -ErrorAction SilentlyContinue

if ($runningDolphin -and $Action -ne 'List') {
  throw 'Ferme Dolphin avant de modifier Virtual-SD : son arrêt resynchronise le dossier.'
}

if (-not (Test-Path -LiteralPath $sdFolder)) {
  New-Item -ItemType Directory -Path $sdFolder | Out-Null
}

switch ($Action) {
  'Open' {
    Start-Process -FilePath 'explorer.exe' -ArgumentList @($sdFolder)
  }
  'List' {
    Get-ChildItem -LiteralPath $sdFolder -Recurse -Force |
      Select-Object FullName, Length, LastWriteTime
  }
  'RefreshLetterBomb' {
    $python = Get-Command python.exe -ErrorAction Stop
    & $python.Source $generator `
      --mac $MacAddress `
      --region $Region `
      --output $sdFolder
    if ($LASTEXITCODE -ne 0) {
      throw "La génération de LetterBomb a échoué ($LASTEXITCODE)."
    }
    Write-Host 'LetterBomb actualisé. Il sera copié dans WiiSD.raw au prochain lancement.'
  }
}