"""
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
import helpers.constants as cte


class UsageHelper:
  """
  Usage helper class
  """
  usage_to_hft = {
    cte.RESIDENTIAL: 'residential',
    cte.INDUSTRY: 'industry',
    cte.OFFICE_ADMINISTRATION: 'office and administration',
    cte.HOTEL: 'hotel',
    cte.HEALTH_CARE: 'health care',
    cte.RETAIL: 'retail',
    cte.HALL: 'hall',
    cte.RESTAURANT: 'restaurant',
    cte.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

  usage_to_comnet = {
    cte.RESIDENTIAL: 'BA Multifamily',
    cte.INDUSTRY: 'BA Manufacturing Facility',
    cte.OFFICE_ADMINISTRATION: 'BA Office',
    cte.HOTEL: 'BA Hotel',
    cte.HEALTH_CARE: 'BA Hospital',
    cte.RETAIL: 'BA Retail',
    cte.HALL: 'BA Town Hall',
    cte.RESTAURANT: 'BA Dining: Bar Lounge/Leisure',
    cte.EDUCATION: 'BA School/University'
  }
  comnet_default_value = 'BA Multifamily'

  @staticmethod
  def comnet_from_usage(usage):
    """
    Get Comnet usage from the given internal usage key
    :param usage: str
    :return: str
    """
    try:
      return UsageHelper.usage_to_comnet[usage]
    except KeyError:
      sys.stderr.write('Error: keyword not found. Returned default Comnet usage "BA Multifamily"\n')
      return UsageHelper.comnet_default_value