#!/bin/bash
set -Eeuo pipefail

COZE_WORKSPACE_PATH="${COZE_WORKSPACE_PATH:-$(pwd)}"
REQUESTED_BACKUP_DIR="${BACKUP_DIR:-}"
REQUESTED_LOCAL_DB_URL="${LOCAL_DB_URL:-}"
TIMESTAMP="$(date +%Y%m%d-%H%M%S)"
TMP_DIR="$(mktemp -d)"

cleanup() {
  rm -rf "${TMP_DIR}"
}
trap cleanup EXIT

cd "${COZE_WORKSPACE_PATH}"

if [ -f ".env.local" ]; then
  set +u
  set -a
  # shellcheck disable=SC1091
  source ".env.local"
  set +a
  set -u
fi

[ -n "${REQUESTED_LOCAL_DB_URL}" ] && LOCAL_DB_URL="${REQUESTED_LOCAL_DB_URL}"
BACKUP_DIR="${REQUESTED_BACKUP_DIR:-${BACKUP_DIR:-${COZE_WORKSPACE_PATH}/backups}}"
BACKUP_FILE="${BACKUP_DIR}/miaojing-backup-${TIMESTAMP}.tar.gz"
mkdir -p "${BACKUP_DIR}"
chmod 700 "${BACKUP_DIR}"

if [ -z "${LOCAL_DB_URL:-}" ]; then
  echo "LOCAL_DB_URL is required in .env.local or environment." >&2
  exit 1
fi

command -v pg_dump >/dev/null 2>&1 || {
  echo "pg_dump is required to create backups." >&2
  exit 1
}

pg_dump "${LOCAL_DB_URL}" --format=custom --file "${TMP_DIR}/database.dump"

STORAGE_SOURCE="${LOCAL_STORAGE_DIR:-${COZE_WORKSPACE_PATH}/local-storage}"
if [ -d "${STORAGE_SOURCE}" ]; then
  cp -a "${STORAGE_SOURCE}" "${TMP_DIR}/local-storage"
fi

if [ -f ".env.local" ]; then
  cp ".env.local" "${TMP_DIR}/.env.local"
fi

if [ -f "package.json" ]; then
  cp "package.json" "${TMP_DIR}/package.json"
fi

cat > "${TMP_DIR}/manifest.json" <<EOF
{
  "app": "miaojingAI",
  "createdAt": "$(date -Iseconds)",
  "hostname": "$(hostname)",
  "includes": ["database.dump", "local-storage", ".env.local", "package.json"]
}
EOF

tar -czf "${BACKUP_FILE}" -C "${TMP_DIR}" .
chmod 600 "${BACKUP_FILE}"

find "${BACKUP_DIR}" -maxdepth 1 -name 'miaojing-backup-*.tar.gz' -type f \
  -printf '%T@ %p\n' | sort -rn | awk 'NR>10 {print $2}' | xargs -r rm -f

echo "${BACKUP_FILE}"