"""
Usage helper
SPDX - License - Identifier: LGPL - 3.0 - or -later
Copyright © 2020 Project Author Pilar Monsalvete Alvarez de Uribarri pilar.monsalvete@concordia.ca
"""
import sys


class UsageHelper:
  usage_to_hft = {
    'residential': 'residential',
    'industry': 'industry',
    'office and administration': 'office and administration',
    'hotel': 'hotel',
    'health care': 'health care',
    'retail': 'retail',
    'hall': 'hall',
    'restaurant': 'restaurant',
    'education': 'education'
  }
  hft_default_value = 'residential'

  @staticmethod
  def hft_from_usage(usage):
    """
    Get HfT usage from the given internal usage key
    :param usage: str
    :return: str
    """
    try:
      return UsageHelper.usage_to_hft[usage]
    except KeyError:
      sys.stderr.write('Error: keyword not found. Returned default HfT usage "residential"\n')
      return UsageHelper.hft_default_value