#!/bin/sh

FULLS_DIR="/app/public/images/fulls"
THUMBS_DIR="/app/public/images/thumbs"

# ImageMagick 7 (Alpine) nutzt "magick" statt "convert"
if command -v magick >/dev/null 2>&1; then
    IM_CMD="magick"
elif command -v convert >/dev/null 2>&1; then
    IM_CMD="convert"
else
    echo "FEHLER: Weder magick noch convert gefunden! Thumbnails koennen nicht erzeugt werden."
    IM_CMD=""
fi

# Thumbnails fuer einen Quell- und Zielordner generieren
generate_thumbs_for_dir() {
    src_dir="$1"
    dst_dir="$2"
    [ -z "$IM_CMD" ] && return
    mkdir -p "$dst_dir"
    for img in "$src_dir"/*; do
        [ -f "$img" ] || continue

        filename=$(basename "$img")
        ext=$(echo "${filename##*.}" | tr '[:upper:]' '[:lower:]')

        case "$ext" in
            jpg|jpeg|png|gif|webp) ;;
            *) continue ;;
        esac

        if [ ! -f "$dst_dir/$filename" ] || [ "$img" -nt "$dst_dir/$filename" ]; then
            echo "Thumbnail erstellen: $dst_dir/$filename"
            $IM_CMD "$img" -resize 512x512 -quality 80 "$dst_dir/$filename"
            if [ $? -ne 0 ]; then
                echo "WARNUNG: Thumbnail fehlgeschlagen fuer $filename"
            fi
        fi
    done
}

generate_all_thumbs() {
    # Root-Bilder
    generate_thumbs_for_dir "$FULLS_DIR" "$THUMBS_DIR"

    # Unterordner (Kunden-Ordner)
    for dir in "$FULLS_DIR"/*/; do
        [ -d "$dir" ] || continue
        foldername=$(basename "$dir")
        generate_thumbs_for_dir "$dir" "$THUMBS_DIR/$foldername"
    done
}

echo "=== Mischkomposition - Starte Thumbnail-Generierung ==="
generate_all_thumbs
echo "=== Thumbnail-Generierung abgeschlossen ==="

# Hintergrund-Prozess: Alle 60 Sekunden nach neuen Bildern suchen
(while true; do
    sleep 60
    generate_all_thumbs
done) &

# Node Server starten
cd /app && node backend/server.js