# Avatar-Thumbnails generieren — original PNGs bleiben, Thumbs als WebP 256x256.
# Idempotent. Re-Run: powershell -ExecutionPolicy Bypass -File "App\Don_t_Deploy\build-avatar-thumbs.ps1"
$ErrorActionPreference = 'Stop'
$src = Join-Path $PSScriptRoot '..\assets\img\avatars'
$dst = Join-Path $src 'thumbs'
if (-not (Test-Path $dst)) { New-Item -ItemType Directory -Path $dst | Out-Null }
$mg = (Get-Command magick -ErrorAction SilentlyContinue).Source
if (-not $mg) {
    $candidate = 'C:\Program Files\ImageMagick-7.1.2-Q16-HDRI\magick.exe'
    if (Test-Path $candidate) { $mg = $candidate }
}
if (-not $mg) { Write-Error 'ImageMagick fehlt'; exit 1 }
$created = 0; $skipped = 0; $failed = 0; $origSize = 0; $thumbSize = 0
Get-ChildItem -Path $src -Filter 'avatar-*.png' | ForEach-Object {
    $orig = $_.FullName
    $thumb = Join-Path $dst ([System.IO.Path]::GetFileNameWithoutExtension($_.Name) + '.webp')
    $origSize += $_.Length
    if ((Test-Path $thumb) -and ((Get-Item $thumb).LastWriteTime -gt $_.LastWriteTime)) {
        $thumbSize += (Get-Item $thumb).Length
        $skipped++
        return
    }
    & $mg $orig -resize '256x256^' -gravity center -extent 256x256 -quality 82 $thumb
    if ($LASTEXITCODE -eq 0 -and (Test-Path $thumb)) {
        $thumbSize += (Get-Item $thumb).Length
        $created++
        Write-Host ('  ok  ' + $_.Name)
    } else {
        $failed++
        Write-Warning ('  fail ' + $_.Name)
    }
}
$origMB  = [math]::Round($origSize / 1MB, 2)
$thumbKB = [math]::Round($thumbSize / 1KB, 1)
Write-Host ''
Write-Host ('Thumbs erstellt: ' + $created + ' neu, ' + $skipped + ' geskippt, ' + $failed + ' Fehler')
Write-Host ('Originale: ' + $origMB + ' MB | Thumbs: ' + $thumbKB + ' KB')