#!/usr/bin/env sh
# lib/os-detect.sh — shared OS/package-manager detection for module installers.
# Source this, then call pkg_install <pkg> [pkg...].

detect_pkg_family() {
  if [ -f /etc/os-release ]; then
    # shellcheck disable=SC1091
    id_line="$(. /etc/os-release && printf '%s %s' "${ID:-}" "${ID_LIKE:-}")"
    case "$id_line" in
      *debian*|*ubuntu*) printf 'debian\n'; return 0 ;;
      *rhel*|*fedora*|*centos*) printf 'rhel\n'; return 0 ;;
    esac
  fi
  if command -v apt-get >/dev/null 2>&1; then
    printf 'debian\n'; return 0
  fi
  if command -v dnf >/dev/null 2>&1 || command -v yum >/dev/null 2>&1; then
    printf 'rhel\n'; return 0
  fi
  printf 'unknown\n'
  return 1
}

pkg_install() {
  family="$(detect_pkg_family)"
  case "$family" in
    debian)
      sudo apt-get update -qq
      sudo apt-get install -y "$@"
      ;;
    rhel)
      if command -v dnf >/dev/null 2>&1; then
        sudo dnf install -y "$@"
      else
        sudo yum install -y "$@"
      fi
      ;;
    *)
      printf 'error: unsupported/undetected OS family; install manually: %s\n' "$*" >&2
      return 1
      ;;
  esac
}