#!/usr/bin/env bash

resolve_compose_env_path() {
  local env_path="${1:-}"
  local dir_part=""
  local base_part=""
  if [[ -z "${env_path}" ]]; then
    echo ""
    return 1
  fi
  if [[ "${env_path}" == /* ]]; then
    echo "${env_path}"
    return 0
  fi
  if [[ -e "${env_path}" ]]; then
    dir_part="$(cd "$(dirname "${env_path}")" && pwd)"
    base_part="$(basename "${env_path}")"
    echo "${dir_part}/${base_part}"
    return 0
  fi
  dir_part="$(dirname "${env_path}")"
  base_part="$(basename "${env_path}")"
  if [[ -d "${dir_part}" ]]; then
    dir_part="$(cd "${dir_part}" && pwd)"
    echo "${dir_part}/${base_part}"
    return 0
  fi
  echo "${env_path}"
  return 0
}

read_compose_project_name_from_env() {
  local env_path="${1:-}"
  local line=""
  env_path="$(resolve_compose_env_path "${env_path}" || true)"
  if [[ -z "${env_path}" || ! -f "${env_path}" ]]; then
    return 1
  fi
  line="$(grep -m1 -E '^COMPOSE_PROJECT_NAME=' "${env_path}" || true)"
  if [[ -z "${line}" ]]; then
    return 1
  fi
  echo "${line#*=}" | tr -d '\r'
}

sanitize_compose_project_name() {
  local raw="${1:-}"
  raw="$(printf '%s' "${raw}" | tr '[:upper:]' '[:lower:]')"
  raw="$(printf '%s' "${raw}" | sed -E 's/[^a-z0-9]+/-/g; s/^-+//; s/-+$//; s/-+/-/g')"
  if [[ -z "${raw}" ]]; then
    raw="nuqloud"
  fi
  if [[ ! "${raw}" =~ ^[a-z0-9] ]]; then
    raw="nc-${raw}"
  fi
  printf '%s\n' "${raw}"
}

derive_compose_project_name_seed() {
  local env_path="${1:-}"
  local base_dir=""
  env_path="$(resolve_compose_env_path "${env_path}" || true)"
  if [[ -n "${env_path}" ]]; then
    base_dir="$(basename "$(dirname "${env_path}")")"
  fi
  sanitize_compose_project_name "${base_dir}"
}

set_compose_project_name_in_env() {
  local env_path="${1:-}"
  local project_name="${2:-}"
  local escaped tmp
  env_path="$(resolve_compose_env_path "${env_path}" || true)"
  if [[ -z "${env_path}" || -z "${project_name}" ]]; then
    return 1
  fi
  escaped="${project_name//\\/\\\\}"
  escaped="${escaped//&/\\&}"
  escaped="${escaped//|/\\|}"
  tmp="$(mktemp)"
  if grep -q -E '^COMPOSE_PROJECT_NAME=' "${env_path}"; then
    sed -E "s|^COMPOSE_PROJECT_NAME=.*$|COMPOSE_PROJECT_NAME=${escaped}|" "${env_path}" > "${tmp}"
  else
    cat "${env_path}" > "${tmp}"
    printf '\nCOMPOSE_PROJECT_NAME=%s\n' "${project_name}" >> "${tmp}"
  fi
  mv "${tmp}" "${env_path}"
}

export_compose_project_name_from_env() {
  local env_path="${1:-}"
  local project_name=""
  project_name="$(read_compose_project_name_from_env "${env_path}" || true)"
  if [[ -z "${project_name}" ]]; then
    project_name="$(derive_compose_project_name_seed "${env_path}")"
    export COMPOSE_PROJECT_NAME="${project_name}"
    return 1
  fi
  export COMPOSE_PROJECT_NAME="${project_name}"
  return 0
}

warn_missing_compose_project_name() {
  local env_path="${1:-}"
  local display_path="${env_path:-.env.devprod}"
  echo "Warning: COMPOSE_PROJECT_NAME is not set in ${display_path}."
  echo "Folder renames can attach a cloud to new Docker volumes."
  echo "Pin it with:"
  echo "  ./scripts/ensure-compose-project-name.sh --env-file ${display_path} --project-name <stable-name>"
}