#!/usr/bin/env bash
# List recent restic snapshots from a labelled repo. Output: JSON array.
# Usage: restic-snapshots.sh nas|b2

set -uo pipefail

LABEL="${1:-}"
if [ "$LABEL" != "nas" ] && [ "$LABEL" != "b2" ]; then
  echo '{"error":"label must be nas or b2"}' >&2
  exit 2
fi

# Load env (idempotent — systemd already loaded it for service contexts).
if [ -z "${RESTIC_REPO_NAS:-}" ] && [ -r /etc/restic-backup.env ]; then
  set -a; . /etc/restic-backup.env; set +a
fi

case "$LABEL" in
  nas) REPO="${RESTIC_REPO_NAS:?RESTIC_REPO_NAS not set}" ;;
  b2)  REPO="${RESTIC_REPO_B2:?RESTIC_REPO_B2 not set}" ;;
esac

export RESTIC_PASSWORD_FILE="${RESTIC_PASSWORD_FILE:-/etc/restic-backup.password}"

# Show last 30 snapshots, newest first, with the fields the UI needs.
restic -r "$REPO" snapshots --json 2>/dev/null \
  | jq --arg repo "$LABEL" '
      sort_by(.time) | reverse | .[0:30]
      | map({
          id: .id,
          short_id: (.short_id // (.id[0:8])),
          time: .time,
          hostname: .hostname,
          tags: (.tags // []),
          paths: (.paths // []),
          summary: (.summary // null),
          repo: $repo
        })
    '