#!/bin/sh
set -eu

cd "$(dirname "$0")/../.."
project="${COMPOSE_PROJECT_NAME:-mobilityops}"
destination="${1:-backups/postgres}"
timestamp="$(date -u +%Y%m%dT%H%M%SZ)"
backup_file="${destination}/mobilityops-${timestamp}.dump"
temporary_file="${backup_file}.partial"
compose_files="-f compose.yaml -f compose.unraid.yaml"

mkdir -p "$destination"
trap 'rm -f "$temporary_file"' EXIT INT TERM

docker compose -p "$project" $compose_files exec -T db sh -eu -c \
  'pg_dump --format=custom --no-owner --no-acl -U "$POSTGRES_USER" "$POSTGRES_DB"' \
  > "$temporary_file"

docker compose -p "$project" $compose_files exec -T db pg_restore --list \
  < "$temporary_file" > /dev/null
mv "$temporary_file" "$backup_file"
trap - EXIT INT TERM
printf '%s\n' "$backup_file"