#!/bin/bash
# Purpose: edit ngcp-config's configuration YML file
################################################################################

set -e
set -u

# support testsuite
FUNCTIONS="${FUNCTIONS:-/usr/share/ngcp-ngcpcfg/functions/}"
HELPER="${HELPER:-/usr/share/ngcp-ngcpcfg/helper/}"

if ! [ -r "${FUNCTIONS}"/main ] ; then
  printf "Error: %s/main could not be read. Exiting.\n" "${FUNCTIONS}" >&2
  exit 1
fi

# shellcheck disable=SC1090
. "${FUNCTIONS}"/main

if [ -z "${EDITOR:-}" ] ; then
  if [ -x "/usr/bin/vim" ]; then
    EDITOR="/usr/bin/vim"
  else
    printf "Error: Missing \$EDITOR environmanent variable. Exiting.\n" >&2
    exit 1
  fi
fi

# main script
RC=0
file=""

if [ "${#:-}" -ge 1 ] ; then
  file=$1
  # Use magic mapper if no real file provided
  if [ ! -r "${file}" ]; then
    case ${file,,} in
      1|config|config.yml)
        if [ -e "${SITES_DIR}/current/config.yml" ]; then
          file="${SITES_DIR}/current/config.yml"
        else
          file="${NGCPCTL_MAIN}/config.yml"
        fi
        ;;
      2|network|network.yml)
        if [ -e "${SITES_DIR}/current/network.yml" ]; then
          file="${SITES_DIR}/current/network.yml"
        else
          file="${NGCPCTL_MAIN}/network.yml"
        fi
        ;;
      3|constants|constants.yml)
        if [ -e "${SITES_DIR}/current/constants.yml" ]; then
          file="${SITES_DIR}/current/constants.yml"
        else
          file="${NGCPCTL_MAIN}/constants.yml"
        fi
        ;;
      *)
        echo "Error: Unknown choice '${file}'. Aborting." >&2
        exit 1
        ;;
    esac
  fi
else
  # Get the list of configs in static order to be constant over the time
  # and process the main YML configs first: config.yml maintenance.yml
  # network.yml constants.yml
  # NOTE: the file are loaded/merged into ngcpcfg in different order!
  declare -a CONFIGS
  for f in ${NGCPCTL_CONFIG:?} ${MAINTENANCE_CONFIG:?} ${NETWORK_CONFIG:?} ${CONSTANTS_CONFIG:?} ${NODE_CONFIG:-} ${PAIR_CONFIG:-} ${HOST_CONFIG:-} ${LOCAL_CONFIG:-} "${EXTRA_CONFIG_FILES[@]}" ; do
    if [ -r "$f" ] ; then
      CONFIGS+=("${f}")
    fi
  done

  select f in "${CONFIGS[@]}" ; do
      if [[ -z "${f}" ]]; then
        echo "Exit as requested."
        exit 0
      else
        file=$f
        break
      fi
  done
fi

"${EDITOR}" "${file}" || RC=$?

exit "$RC"

## END OF FILE #################################################################