"""
monthly_to_hourly_demand module
SPDX - License - Identifier: LGPL - 3.0 - or -later
Copyright © 2020 Project Author Pilar Monsalvete pilar_monsalvete@yahoo.es
"""
import pandas as pd
import helpers.constants as cte


class MonthlyToHourlyDemand:
  """
  MonthlyToHourlyDemand class
  """
  def __init__(self, building):
    self._hourly_heating = pd.DataFrame()
    self._hourly_cooling = pd.DataFrame()
    self._building = building

  @property
  def hourly_heating(self):
    # todo: this method and the insel model have to be reviewed for more than one thermal zone
    external_temp = self._building.hourly_external_temperature

    # todo: review index depending on how the schedules are defined, either 8760 or 24 hours
    # todo: usage_zone values not implemented
    period = 'day'
    for usage_zone in self._building.usage_zones:
      temp_set = usage_zone.heating_setpoint
      temp_back = usage_zone.heating_setback
      occupancy = usage_zone.occupancy(period)
      heating_schedule = usage_zone.heating_schedule_month

      self._hourly_heating = pd.DataFrame(columns=['monthly to hourly'])
      i = 0
      for month in range(0, 12):
        temp_grad_month = 0
        for day in cte.days_of_month[month]:
          external_temp_med = 0
          for hour in range(0, 24):
            external_temp_med += external_temp[i]/24
          for hour in range(0, 24):
            if external_temp_med < temp_set[i] & heating_schedule[month] == 1:
              schedule = usage_zone.heating_schedule_day[day]
              if schedule[hour] == 1:
                temp_grad_day = temp_set[i] - external_temp[i]
              else:
                temp_grad_day = temp_back[i] - external_temp[i]
            else:
              temp_grad_day = 0

            temp_grad_month += temp_grad_day
            self._hourly_heating.append(self._building.monthly_heating(month)*temp_grad_day/temp_grad_month)
            i += 1

    return self._hourly_heating

  @property
  def hourly_cooling(self) -> NotImplementedError:
    raise NotImplementedError