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

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ENV_FILE="${SCRIPT_DIR}/restic-backup.env"
HOMELAB_ROOT="/srv/homelab"
STACKS_STOPPED=false

start_stacks() {
  if [[ "$STACKS_STOPPED" != true ]]; then
    return 0
  fi
  echo "Starting Docker stacks..."
  cd "$HOMELAB_ROOT"
  docker compose -f stacks/media/compose.yaml up -d
  docker compose -f stacks/monitoring/compose.yaml up -d
  docker compose -f stacks/storage/compose.yaml up -d
  echo "Stacks started."
}
trap start_stacks EXIT

if [[ -f "$ENV_FILE" ]]; then
  set -a
  # shellcheck source=/dev/null
  source "$ENV_FILE"
  set +a
fi

if [[ -z "${RESTIC_REPOSITORY:-}" ]]; then
  echo "Error: RESTIC_REPOSITORY is not set. Create ${ENV_FILE} or export it." >&2
  echo "Example: RESTIC_REPOSITORY=sftp:user@host:/backups/restic" >&2
  exit 1
fi

if [[ -z "${RESTIC_PASSWORD:-}" ]]; then
  echo "Error: RESTIC_PASSWORD is not set. Create ${ENV_FILE} or export it." >&2
  exit 1
fi

CADDYFILE="/etc/caddy/Caddyfile"
UNBOUND_CONF="/etc/unbound/unbound.conf"

echo "Stopping Docker stacks..."
cd "$HOMELAB_ROOT"
docker compose -f stacks/media/compose.yaml down
docker compose -f stacks/monitoring/compose.yaml down
docker compose -f stacks/storage/compose.yaml down
STACKS_STOPPED=true

echo "Starting restic backup..."
restic backup \
  "$HOMELAB_ROOT" \
  "$CADDYFILE" \
  "$UNBOUND_CONF"

echo "Backup finished. Snapshot list:"
restic snapshots --latest 5