#!/usr/bin/env bash
# =============================================================
# GoToSocial backup: SQLite consistent + медиа → backups/
# + копия на Яндекс.Диск (ротация 7 дней локально / 30 на ЯД)
# =============================================================
set -euo pipefail

BASE_DIR="/opt/gotosocial"
DATA_DIR="${BASE_DIR}/data"
BACKUP_DIR="${BASE_DIR}/backups"
YANDEX_DIR="/mnt/yandex-disk/backup/gotosocial-backups"
TS="$(date +%Y%m%d_%H%M%S)"

# --- SQLite consistent: VACUUM INTO (не горячая копия файла) ---
SQLITE_TMP="${BACKUP_DIR}/sqlite-consistent-${TS}.db"
mkdir -p "${BACKUP_DIR}"
sqlite3 "${DATA_DIR}/sqlite.db" "VACUUM INTO '${SQLITE_TMP}';"

# --- Сбор архива: consistent db + медиа ---
ARCHIVE="${BACKUP_DIR}/gotosocial_${TS}.tar.gz"
tar -C "${DATA_DIR}" -czf "${ARCHIVE}" \
  --transform="s|sqlite-consistent-${TS}.db|sqlite.db|" \
  "${SQLITE_TMP#${DATA_DIR}/}" storage 2>/dev/null \
  || tar -C "${BACKUP_DIR}" -czf "${ARCHIVE}" "sqlite-consistent-${TS}.db" -C "${DATA_DIR}" storage
rm -f "${SQLITE_TMP}"

# --- Архив секретов (.env) отдельно ---
ENV_ARCHIVE="${BACKUP_DIR}/gotosocial_env_${TS}.tar.gz"
tar -C "${BASE_DIR}" -czf "${ENV_ARCHIVE}" .env

# --- Копия на Яндекс.Диск ---
if ! mountpoint -q "${YANDEX_DIR%/backup/*}"; then
  echo "ERROR: Яндекс.Диск не примонтирован (${YANDEX_DIR%/backup/*})" >&2
  exit 1
fi
mkdir -p "${YANDEX_DIR}"
cp -p "${ARCHIVE}" "${ENV_ARCHIVE}" "${YANDEX_DIR}/"

# --- Ротация: локально 7 дней, ЯД 30 дней ---
find "${BACKUP_DIR}" -maxdepth 1 -type f -name 'gotosocial_*' -mtime +7 -delete
find "${YANDEX_DIR}" -maxdepth 1 -type f -name 'gotosocial_*' -mtime +30 -delete

echo "OK: ${ARCHIVE}"
echo "OK: ${ENV_ARCHIVE}"
ls -lh "${ARCHIVE}" "${ENV_ARCHIVE}"