#!/bin/sh
set -eu

RCLONE_CONFIG_PATH="${RCLONE_CONFIG:-/home/node/.config/rclone/rclone.conf}"
DB_PATH="${DB_FILE:-/data/data.sqlite}"
BACKUP_FILE="promptlib-latest.sqlite"

join_rclone_target() {
  remote="$1"
  file="$2"
  case "$remote" in
    *:|*/) printf '%s%s' "$remote" "$file" ;;
    *) printf '%s/%s' "$remote" "$file" ;;
  esac
}

if [ -n "${RCLONE_CONF:-}" ]; then
  mkdir -p "$(dirname "$RCLONE_CONFIG_PATH")"
  printf '%s' "$RCLONE_CONF" > "$RCLONE_CONFIG_PATH"
  chmod 600 "$RCLONE_CONFIG_PATH"
  export RCLONE_CONFIG="$RCLONE_CONFIG_PATH"
fi

if [ -n "${RCLONE_BACKUP_REMOTE:-}" ]; then
  mkdir -p "$(dirname "$DB_PATH")"
  if [ ! -s "$DB_PATH" ] || [ "${RCLONE_RESTORE_FORCE:-}" = "1" ]; then
    if rclone lsf "$RCLONE_BACKUP_REMOTE" --files-only --include "$BACKUP_FILE" 2>/dev/null | grep -qx "$BACKUP_FILE"; then
      restore_source="$(join_rclone_target "$RCLONE_BACKUP_REMOTE" "$BACKUP_FILE")"
      echo "[restore] downloading $restore_source to $DB_PATH"
      rclone copyto "$restore_source" "$DB_PATH"
    else
      echo "[restore] no remote backup found at $(join_rclone_target "$RCLONE_BACKUP_REMOTE" "$BACKUP_FILE")"
    fi
  else
    echo "[restore] local database exists, skipping restore"
  fi
fi

exec "$@"