#!/usr/bin/env bash
#
# 备份 PostgreSQL 与 uploads 目录
# 版权所有 (c) 马建军
#
set -euo pipefail

INSTALL_DIR="${INSTALL_DIR:-/opt/secondary-school-grade-archive}"
BACKUP_DIR="${BACKUP_DIR:-${INSTALL_DIR}/backups}"
TIMESTAMP=$(date +%Y%m%d_%H%M%S)

cd "${INSTALL_DIR}"
mkdir -p "${BACKUP_DIR}"

echo "[INFO] 备份数据库…"
docker compose --env-file .env exec -T db \
  pg_dump -U "${POSTGRES_USER:-postgres}" "${POSTGRES_DB:-student_archive}" \
  > "${BACKUP_DIR}/db_${TIMESTAMP}.sql"

echo "[INFO] 备份 uploads…"
tar -czf "${BACKUP_DIR}/uploads_${TIMESTAMP}.tar.gz" -C "${INSTALL_DIR}" uploads/

echo "[INFO] 备份完成:"
echo "  ${BACKUP_DIR}/db_${TIMESTAMP}.sql"
echo "  ${BACKUP_DIR}/uploads_${TIMESTAMP}.tar.gz"