#!/usr/bin/env bash
set -euo pipefail

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"

BACKUP_DIR="${BACKUP_DIR:-$ROOT_DIR/deploy/trialrun/backups}"
mkdir -p "$BACKUP_DIR"

TS="$(date +%Y%m%d_%H%M%S)"
OUT_FILE="${OUT_FILE:-$BACKUP_DIR/hyb-oa-storage-${TS}.tar.gz}"

if [[ -e "$OUT_FILE" ]]; then
  echo "[ERR] backup output already exists: $OUT_FILE" >&2
  exit 1
fi

STORAGE_DIR_HOST="${STORAGE_DIR_HOST:-}"
if [[ -z "$STORAGE_DIR_HOST" ]]; then
  if [[ -n "${STORAGE_DIR:-}" && -d "${STORAGE_DIR:-}" ]]; then
    STORAGE_DIR_HOST="$STORAGE_DIR"
  elif [[ -d "$ROOT_DIR/deploy/trialrun/data/storage" ]]; then
    STORAGE_DIR_HOST="$ROOT_DIR/deploy/trialrun/data/storage"
  else
    echo "[ERR] storage dir not found; set STORAGE_DIR_HOST" >&2
    exit 1
  fi
fi

if [[ ! -d "$STORAGE_DIR_HOST" ]]; then
  echo "[ERR] storage dir not found: $STORAGE_DIR_HOST" >&2
  exit 1
fi

mkdir -p "$(dirname "$OUT_FILE")"

echo "[INFO] Storage backup start: $OUT_FILE"
echo "[INFO] Storage dir: $STORAGE_DIR_HOST"

if ! tar -czf "$OUT_FILE" -C "$STORAGE_DIR_HOST" .; then
  rm -f -- "$OUT_FILE"
  echo "[ERR] storage backup failed" >&2
  exit 1
fi

if [[ ! -s "$OUT_FILE" ]]; then
  echo "[ERR] storage backup is empty: $OUT_FILE" >&2
  exit 1
fi

echo "[OK] Storage backup done: $OUT_FILE"