#!/bin/bash
# Daily backup via Pythons sqlite3.backup() — atomar, async-DB-safe,
# kein sqlite3-CLI im Container vorausgesetzt.
set -euo pipefail
TS=$(date +%Y%m%d-%H%M%S)
BACKUP_DIR=/opt/gwoe-antragspruefer/backups
mkdir -p $BACKUP_DIR
docker exec gwoe-antragspruefer python -c "
import sqlite3
src = sqlite3.connect(\"/app/data/gwoe-antraege.db\")
dst = sqlite3.connect(\"/tmp/db-backup.db\")
src.backup(dst); dst.close(); src.close()
" 2>&1
docker cp gwoe-antragspruefer:/tmp/db-backup.db $BACKUP_DIR/gwoe-antraege-$TS.db
docker exec gwoe-antragspruefer rm /tmp/db-backup.db
gzip -9 $BACKUP_DIR/gwoe-antraege-$TS.db
find $BACKUP_DIR -name "gwoe-antraege-*.db.gz" -mtime +30 \
  ! -name "gwoe-antraege-*01-*.db.gz" -delete 2>/dev/null || true
echo "$(date -Iseconds) backup ok: $BACKUP_DIR/gwoe-antraege-$TS.db.gz"