#!/usr/bin/env sh
set -eu

BACKUP_DIR="${BACKUP_DIR:-backups}"
CONTAINER="${DB_CONTAINER:-ss-db-1}"
DATABASE="${DB_NAME:-smm}"
USER="${DB_USER:-smm}"
PASSWORD="${DB_PASSWORD:-smm_password}"
TIMESTAMP="$(date +%Y%m%d-%H%M%S)"
OUTPUT="${BACKUP_DIR}/${DATABASE}-${TIMESTAMP}.sql"

mkdir -p "$BACKUP_DIR"

docker exec "$CONTAINER" mariadb-dump \
  --user="$USER" \
  --password="$PASSWORD" \
  --single-transaction \
  --routines \
  --triggers \
  "$DATABASE" > "$OUTPUT"

printf 'Backup written to %s\n' "$OUTPUT"