#!/usr/bin/env bash

apk_repo_root() {
  cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd
}

apk_package_root() {
  local repo_root="$1"
  printf '%s\n' "${ALPINE_PACKAGE_ROOT:-${repo_root}/packaging/alpine/local}"
}

apk_package_dirs() {
  local repo_root="$1"
  local package_root
  local package
  local dir

  package_root="$(apk_package_root "${repo_root}")"

  if [[ -n "${APKBUILD_DIR:-}" ]]; then
    printf '%s\n' "${APKBUILD_DIR}"
    return
  fi

  if [[ -n "${ALPINE_PACKAGE:-}" || -n "${ALPINE_PACKAGES:-}" ]]; then
    for package in ${ALPINE_PACKAGE:-${ALPINE_PACKAGES:-}}; do
      case "${package}" in
        /*|.*/*|*/*)
          dir="${package}"
          ;;
        *)
          dir="${package_root}/${package}"
          ;;
      esac
      printf '%s\n' "${dir}"
    done
    return
  fi

  find "${package_root}" -mindepth 2 -maxdepth 2 -name APKBUILD -print \
    | sed 's#/APKBUILD$##' \
    | sort
}

apk_validate_package_dir() {
  local package_dir="$1"

  if [[ ! -f "${package_dir}/APKBUILD" ]]; then
    printf 'missing APKBUILD: %s\n' "${package_dir}/APKBUILD" >&2
    return 1
  fi
}

apk_package_name() {
  basename "$1"
}

apk_package_arches() {
  local package_dir="$1"

  awk -F= '
    $1 == "arch" {
      gsub(/["'\'']/, "", $2)
      gsub(/^[ \t]+|[ \t]+$/, "", $2)
      print $2
      exit
    }
  ' "${package_dir}/APKBUILD"
}

apk_package_supports_arch() {
  local package_dir="$1"
  local arch="$2"
  local supported_arches
  local supported_arch

  supported_arches="$(apk_package_arches "${package_dir}")"

  for supported_arch in ${supported_arches}; do
    case "${supported_arch}" in
      all|noarch|"${arch}")
        return 0
        ;;
    esac
  done

  return 1
}

apk_container_package_dir() {
  local repo_root="$1"
  local package_dir="$2"

  case "${package_dir}" in
    "${repo_root}"/*)
      printf '/work/%s\n' "${package_dir#"${repo_root}/"}"
      ;;
    *)
      printf 'package directory must be inside repository: %s\n' "${package_dir}" >&2
      return 1
      ;;
  esac
}

apk_run_package_hook() {
  local repo_root="$1"
  local package_dir="$2"
  local hook_name="$3"
  shift 3

  local package_name
  local hook_path

  package_name="$(apk_package_name "${package_dir}")"
  hook_path="${package_dir}/scripts/${hook_name}.sh"

  if [[ ! -e "${hook_path}" ]]; then
    printf 'Skipping %s: no %s hook\n' "${package_name}" "${hook_name}"
    return
  fi
  if [[ ! -x "${hook_path}" ]]; then
    printf 'package hook is not executable: %s\n' "${hook_path}" >&2
    return 1
  fi

  printf 'Running %s hook for %s\n' "${hook_name}" "${package_name}"
  REPO_ROOT="${repo_root}" \
    PACKAGE_DIR="${package_dir}" \
    PACKAGE_NAME="${package_name}" \
    "${hook_path}" "$@"
}