#!/usr/bin/env bash
# Backup der Shared-Memory-SQLite + Configs (cron-bar auf der Box).
# Behält die letzten 7 Snapshots. Identisch zur /api/system/backup-Logik.
set -euo pipefail

MODELS_DIR="${MC_MODELS_DIR:-/srv/models}"
MEM_DB="${MC_MEMORY_DB:-$MODELS_DIR/mc2-memory.db}"
LSWAP="${MC_CONFIG_PATH:-/etc/llama-swap/config.yaml}"
DEST="$MODELS_DIR/mc2-backups/$(date +%Y%m%d-%H%M%S)"

mkdir -p "$DEST"
for f in "$MEM_DB" "$MEM_DB-wal" "$MEM_DB-shm" "$LSWAP"; do
  [ -f "$f" ] && cp -p "$f" "$DEST/" || true
done

# nur die letzten 7 behalten
ls -1dt "$MODELS_DIR"/mc2-backups/*/ 2>/dev/null | tail -n +8 | xargs -r rm -rf
echo "OK — Backup unter $DEST"