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

script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
repo_root="$(cd "${script_dir}/.." && pwd)"
env_file="${repo_root}/.env.devprod"
project_name=""
write_if_missing="0"

source "${script_dir}/lib-compose-project.sh"

usage() {
  cat <<'USAGE'
Usage: ./scripts/ensure-compose-project-name.sh [options]

Pins or reports the stable Docker Compose project name used by this cloud.
Keeping COMPOSE_PROJECT_NAME stable prevents folder renames from attaching the
instance to a fresh set of named volumes.

Options:
  --env-file <path>        Env file to inspect/update (default: .env.devprod)
  --project-name <name>    Explicit project name to write after sanitization
  --write-if-missing       If COMPOSE_PROJECT_NAME is missing, seed it from the env file directory name
  -h, --help               Show this help
USAGE
}

while [[ $# -gt 0 ]]; do
  case "$1" in
    --env-file)
      env_file="${2:-}"
      shift 2
      ;;
    --env-file=*)
      env_file="${1#*=}"
      shift
      ;;
    --project-name)
      project_name="${2:-}"
      shift 2
      ;;
    --project-name=*)
      project_name="${1#*=}"
      shift
      ;;
    --write-if-missing)
      write_if_missing="1"
      shift
      ;;
    -h|--help)
      usage
      exit 0
      ;;
    *)
      echo "Unknown option: $1"
      usage
      exit 1
      ;;
  esac
done

if [[ "${env_file}" != /* ]]; then
  env_file="${repo_root}/${env_file}"
fi

if [[ ! -f "${env_file}" ]]; then
  echo "Missing env file: ${env_file}"
  exit 1
fi

current_project_name="$(read_compose_project_name_from_env "${env_file}" || true)"
if [[ -n "${current_project_name}" ]]; then
  echo "COMPOSE_PROJECT_NAME=${current_project_name}"
  exit 0
fi

if [[ -n "${project_name}" ]]; then
  project_name="$(sanitize_compose_project_name "${project_name}")"
  set_compose_project_name_in_env "${env_file}" "${project_name}"
  echo "Pinned COMPOSE_PROJECT_NAME=${project_name} in ${env_file}"
  exit 0
fi

if [[ "${write_if_missing}" == "1" ]]; then
  project_name="$(derive_compose_project_name_seed "${env_file}")"
  set_compose_project_name_in_env "${env_file}" "${project_name}"
  echo "Seeded COMPOSE_PROJECT_NAME=${project_name} in ${env_file}"
  exit 0
fi

warn_missing_compose_project_name "${env_file}"
exit 1