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

root_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
timestamp="$(date -u +%Y%m%dT%H%M%SZ)"
destination="${1:-${root_dir}/backups/${timestamp}}"
project_name="${COMPOSE_PROJECT_NAME:-}"
if [[ -z "${project_name}" && -f "${root_dir}/.env" ]]; then
  project_name="$(sed -n 's/^COMPOSE_PROJECT_NAME=//p' "${root_dir}/.env" | sed -n '1p')"
fi
project_name="${project_name:-$(basename "${root_dir}")}"
compose=(docker compose --env-file "${root_dir}/.env" -p "${project_name}" -f "${root_dir}/docker-compose.yml")

mkdir -p "${destination}"
destination="$(cd "${destination}" && pwd)"

"${compose[@]}" exec -T platform-db \
  pg_dump -U platform -d platform --format=custom > "${destination}/platform.dump"
docker run --rm \
  -v "${project_name}_private-assets:/source:ro" \
  -v "${destination}:/backup" \
  alpine:3.20 tar -czf /backup/private-assets.tar.gz -C /source .

cp "${root_dir}/.env.example" "${destination}/environment.template"
printf 'Backup created at %s\n' "${destination}"