#!/bin/sh

_boxconf_try_files(){
  # Get the highest precedence file for a given path.
  # $1 = target file path
  for _bcsf_file in \
    "${BOXCONF_SITE_FILE_DIR}${1}.${BOXCONF_HOSTNAME}" \
    "${BOXCONF_FILE_DIR}${1}.${BOXCONF_HOSTNAME}" \
    "${BOXCONF_SITE_FILE_DIR}${1}.${BOXCONF_HOSTCLASS}.${BOXCONF_DISTRO}" \
    "${BOXCONF_FILE_DIR}${1}.${BOXCONF_HOSTCLASS}.${BOXCONF_DISTRO}" \
    "${BOXCONF_SITE_FILE_DIR}${1}.${BOXCONF_DISTRO}.${BOXCONF_HOSTCLASS}" \
    "${BOXCONF_FILE_DIR}${1}.${BOXCONF_DISTRO}.${BOXCONF_HOSTCLASS}" \
    "${BOXCONF_SITE_FILE_DIR}${1}.${BOXCONF_HOSTCLASS}.${BOXCONF_OS}" \
    "${BOXCONF_FILE_DIR}${1}.${BOXCONF_HOSTCLASS}.${BOXCONF_OS}" \
    "${BOXCONF_SITE_FILE_DIR}${1}.${BOXCONF_OS}.${BOXCONF_HOSTCLASS}" \
    "${BOXCONF_FILE_DIR}${1}.${BOXCONF_OS}.${BOXCONF_HOSTCLASS}" \
    "${BOXCONF_SITE_FILE_DIR}${1}.${BOXCONF_HOSTCLASS}" \
    "${BOXCONF_FILE_DIR}${1}.${BOXCONF_HOSTCLASS}" \
    "${BOXCONF_SITE_FILE_DIR}${1}.${BOXCONF_DISTRO}" \
    "${BOXCONF_FILE_DIR}${1}.${BOXCONF_DISTRO}" \
    "${BOXCONF_SITE_FILE_DIR}${1}.${BOXCONF_OS}" \
    "${BOXCONF_FILE_DIR}${1}.${BOXCONF_OS}" \
    "${BOXCONF_SITE_FILE_DIR}${1}.common" \
    "${BOXCONF_FILE_DIR}${1}.common"
  do
    if [ -f "$_bcsf_file" ]; then
      echo "$_bcsf_file"
      return
    fi
  done

  bug "no source file found for ${1}"
}

install_file(){
  # Install the files at the given paths into the target system.
  # The source file is chosen from the matching file in the boxconf directory with
  # the highest-precedence suffix.
  # Takes options similar to the `install` command.
  _bcif_install_args='-Cv'
  _bcif_mode=0644

  while getopts m:o:g: _bcif_opt; do
    case $_bcif_opt in
      m) _bcif_mode=$OPTARG ;;
      o) _bcif_install_args="${_bcif_install_args} -o ${OPTARG}" ;;
      g) _bcif_install_args="${_bcif_install_args} -g ${OPTARG}" ;;
    esac
  done
  shift $((OPTIND - 1))

  while [ $# -gt 0 ]; do
    _bcif_src=$(_boxconf_try_files "$1")
    install -m "$_bcif_mode" $_bcif_install_args "$_bcif_src" "$1"
    log "installed file ${1}"
    shift
  done
}

install_directory(){
  # Create the specified directories in the target system.
  # Takes options similar to the `install` command.
  _bcid_install_args='-Cdv'
  _bcid_mode=0755

  while getopts m:o:g: _bcid_opt; do
    case $_bcid_opt in
      m) _bcid_mode=$OPTARG ;;
      o) _bcid_install_args="${_bcid_install_args} -o ${OPTARG}" ;;
      g) _bcid_install_args="${_bcid_install_args} -g ${OPTARG}" ;;
    esac
  done
  shift $((OPTIND - 1))

  while [ $# -gt 0 ]; do
    install -m "$_bcid_mode" $_bcid_install_args "$1"
    log "installed directory ${1}"
    shift
  done
}

install_template(){
  # Install the templatess at the given paths into the target system.
  # The source template is chosen from the matching file in the boxconf directory
  # with the highest-precedence suffix. Template is rendered as a shell heredoc.
  # Takes options similar to the `install` command.
  _bcit_install_args='-Cv'
  _bcit_mode=0644

  while getopts m:o:g: _bcit_opt; do
    case $_bcit_opt in
      m) _bcit_mode=$OPTARG ;;
      o) _bcit_install_args="${_bcit_install_args} -o ${OPTARG}" ;;
      g) _bcit_install_args="${_bcit_install_args} -g ${OPTARG}" ;;
    esac
  done
  shift $((OPTIND - 1 ))

  while [ $# -gt 0 ]; do
    _bcit_src=$(_boxconf_try_files "$1")

    eval "cat <<__BOXCONF_EOF__ >${_bcit_src}.render
$(cat "$_bcit_src")
__BOXCONF_EOF__
"
    [ -s "${_bcit_src}.render" ] || bug "failed to render template: ${_bcit_src}"
    install -m "$_bcit_mode" $_bcit_install_args "${_bcit_src}.render" "$1"
    log "installed template ${1}"
    shift
  done
}

install_certificate(){
  # Install a certificate from the CA dir into the target system.
  # Takes options similar to the `install` command.
  # $1 = certificate name
  # $2 = target path
  _bcic_install_args='-Cv'
  _bcic_mode=0644

  while getopts m:o:g: _bcic_opt; do
    case $_bcic_opt in
      m) _bcic_mode=$OPTARG ;;
      o) _bcic_install_args="${_bcic_install_args} -o ${OPTARG}" ;;
      g) _bcic_install_args="${_bcic_install_args} -g ${OPTARG}" ;;
    esac
  done
  shift $((OPTIND - 1))

  [ -f "${BOXCONF_CA_DIR}/${BOXCONF_HOSTNAME}/${1}.fullchain.crt" ] \
    || bug "no certificate exists for ${BOXCONF_HOSTNAME}/${1}"

  install -m "$_bcic_mode" $_bcic_install_args "${BOXCONF_CA_DIR}/${BOXCONF_HOSTNAME}/${1}.fullchain.crt" "$2"
  log "installed certificate ${2}"
}

install_certificate_key(){
  # Install a certificate's private key from the CA dir into the target system.
  # Takes options similar to the `install` command.
  # $1 = certificate name
  # $2 = target path
  _bcick_install_args='-Cv'
  _bcick_mode=0600

  while getopts m:o:g: _bcick_opt; do
    case $_bcick_opt in
      m) _bcick_mode=$OPTARG ;;
      o) _bcick_install_args="${_bcick_install_args} -o ${OPTARG}" ;;
      g) _bcick_install_args="${_bcick_install_args} -g ${OPTARG}" ;;
    esac
  done
  shift $((OPTIND - 1))

  [ -f "${BOXCONF_CA_DIR}/${BOXCONF_HOSTNAME}/${1}.key" ] \
    || bug "no key exists for ${BOXCONF_HOSTNAME}/${1}"

  install -m "$_bcick_mode" $_bcick_install_args "${BOXCONF_CA_DIR}/${BOXCONF_HOSTNAME}/${1}.key" "$2"
  log "installed certificate key ${2}"
}

install_ca_certificate(){
  # Install a the root CA from the CA dir into the target system.
  # Takes options similar to the `install` command.
  # $1 = target path
  _bcicc_install_args='-Cv'
  _bcicc_mode=0644

  while getopts m:o:g: _bcicc_opt; do
    case $_bcicc_opt in
      m) _bcicc_mode=$OPTARG ;;
      o) _bcicc_install_args="${_bcicc_install_args} -o ${OPTARG}" ;;
      g) _bcicc_install_args="${_bcicc_install_args} -g ${OPTARG}" ;;
    esac
  done
  shift $((OPTIND - 1))

  [ -f "${BOXCONF_CA_DIR}/ca.crt" ] || bug 'CA certificate not found'

  install -m "$_bcicc_mode" $_bcicc_install_args "${BOXCONF_CA_DIR}/ca.crt" "$1"
  log "installed root CA to ${1}"
}

set_facl(){
  # Replaces the NFSv4 ACL on a file with the specified ACL list.
  # $1 = path
  # $2-$N = ACL entries
  [ "$BOXCONF_OS" = freebsd ] || bug 'set_facl only supported on FreeBSD'
  _bcsetfacl_path=$1; shift
  setfacl -b -a 0 "$(join ',' "$@")" "$_bcsetfacl_path"
}