#!/usr/bin/env bash
# Baut grotti_<version>_<arch>.deb (auf dem Zielsystem oder arm64-Container).
# Aufruf aus dem Repo-Root:  bash packaging/build-deb.sh
set -euo pipefail

ROOT="$(cd "$(dirname "$0")/.." && pwd)"
cd "$ROOT"

if ! command -v dpkg-deb >/dev/null 2>&1; then
  echo "dpkg-deb fehlt — bitte auf Debian/Raspberry Pi OS bauen." >&2
  exit 1
fi

VERSION="$(python3 -c "from grotti.version import __version__; print(__version__)")"
ARCH="$(dpkg --print-architecture)"
PKG="grotti_${VERSION}_${ARCH}"
DIST="$ROOT/packaging/dist"
STAGE="$DIST/$PKG"

rm -rf "$STAGE"
mkdir -p "$STAGE/DEBIAN" \
  "$STAGE/usr/lib/grotti" \
  "$STAGE/usr/bin" \
  "$STAGE/etc/grotti" \
  "$STAGE/lib/systemd/system" \
  "$STAGE/usr/share/grotti" \
  "$STAGE/usr/share/doc/grotti" \
  "$STAGE/var/lib/grotti/data/eingang" \
  "$STAGE/var/lib/grotti/slice"

rsync -a --delete \
  --exclude '__pycache__' --exclude '*.pyc' --exclude '.pytest_cache' \
  "$ROOT/grotti/" "$STAGE/usr/lib/grotti/grotti/"
rsync -a --delete \
  --exclude '__pycache__' --exclude '*.pyc' \
  "$ROOT/web/" "$STAGE/usr/lib/grotti/web/"
cp "$ROOT/server.py" "$STAGE/usr/lib/grotti/server.py"
cp "$ROOT/requirements.txt" "$STAGE/usr/lib/grotti/requirements.txt"
cp "$ROOT/config.example.json" "$STAGE/usr/lib/grotti/config.example.json"
mkdir -p "$STAGE/usr/lib/grotti/scripts"
cp "$ROOT/scripts/pfade_umziehen.py" "$STAGE/usr/lib/grotti/scripts/pfade_umziehen.py"
# Symlink-Pfad für die Anleitung
mkdir -p "$STAGE/opt/grotti"
ln -sfn /usr/lib/grotti/scripts "$STAGE/opt/grotti/scripts"
ln -sfn /usr/lib/grotti/venv "$STAGE/opt/grotti/venv"
echo '[]' > "$STAGE/usr/lib/grotti/drucker.json"
cp "$ROOT/packaging/config.pi.json" "$STAGE/usr/share/grotti/config.pi.json"
cp "$ROOT/packaging/config.pi.json" "$STAGE/etc/grotti/config.json"
cp "$ROOT/packaging/grotti.service" "$STAGE/lib/systemd/system/grotti.service"
cp "$ROOT/docs/Anleitung-Installation-Pi.md" "$STAGE/usr/share/doc/grotti/"
cp "$ROOT/CHANGELOG.md" "$STAGE/usr/share/doc/grotti/changelog"
gzip -9 -f "$STAGE/usr/share/doc/grotti/changelog"

cat > "$STAGE/usr/bin/grotti" <<'EOF'
#!/bin/sh
export GROTTI_CONFIG="${GROTTI_CONFIG:-/etc/grotti/config.json}"
exec /usr/lib/grotti/venv/bin/python /usr/lib/grotti/server.py "$@"
EOF
chmod 755 "$STAGE/usr/bin/grotti"

python3 -m venv "$STAGE/usr/lib/grotti/venv"
"$STAGE/usr/lib/grotti/venv/bin/pip" install --upgrade pip wheel
"$STAGE/usr/lib/grotti/venv/bin/pip" install -r "$ROOT/requirements.txt"

SIZE_KB="$(du -sk "$STAGE" | awk '{print $1}')"
cat > "$STAGE/DEBIAN/control" <<EOF
Package: grotti
Version: ${VERSION}
Section: web
Priority: optional
Architecture: ${ARCH}
Maintainer: Dominic Gundel <dgundel@gmail.com>
Depends: python3 (>= 3.11), python3-venv, postgresql, adduser
Installed-Size: ${SIZE_KB}
Homepage: https://git.gundel.dev/dg/grotti
Description: Farm-Manager für Moonraker-Drucker (Kobra 3 / S1)
 Grotti steuert eine 3D-Drucker-Farm über Moonraker: Wand, Warteschlange,
 Material, Abläufe und Protokoll. PostgreSQL wird lokal mit eingerichtet.
EOF

cp "$ROOT/packaging/debian/conffiles" "$STAGE/DEBIAN/conffiles"
for script in postinst prerm postrm; do
  cp "$ROOT/packaging/debian/$script" "$STAGE/DEBIAN/$script"
  chmod 755 "$STAGE/DEBIAN/$script"
done

dpkg-deb --root-owner-group --build "$STAGE" "$DIST/${PKG}.deb"
echo "Gebaut: $DIST/${PKG}.deb"
echo "Install: sudo apt install ./packaging/dist/${PKG}.deb"
echo "Logs:    journalctl -u grotti -f"