"""
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
from city_model_structure.attributes.occupancy import Occupancy
import calendar as cal

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

  @property
  def hourly_heating(self):
    """
    hourly distribution of the monthly heating of a building
    :return: [hourly_heating]
    """
    # todo: this method and the insel model have to be reviewed for more than one thermal zone
    external_temp = self._building.external_temperature['hour']

    # todo: review index depending on how the schedules are defined, either 8760 or 24 hours
    for usage_zone in self._building.usage_zones:
      temp_set = float(usage_zone.heating_setpoint)
      temp_back = float(usage_zone.heating_setback)
      occupancy = Occupancy().get_complete_year_schedule(usage_zone.schedules['Occupancy'])
      heating_schedule = self._conditioning_seasons['heating']

      hourly_heating = []
      i = 0
      temp_grad_day = []
      for month in range(1, 13):
        temp_grad_month = 0
        month_range = cal.monthrange(2015, month)
        for day in range(1, month_range[1]+1):
          external_temp_med = 0
          for hour in range(0, 24):
            external_temp_med += external_temp['inseldb'][i]/24
          for hour in range(0, 24):
            if external_temp_med < temp_set and heating_schedule[month-1] == 1:
              if occupancy[hour] > 0:
                temp_grad_day.append(temp_set - external_temp['inseldb'][i])
              else:
                temp_grad_day.append(temp_back - external_temp['inseldb'][i])
            else:
              temp_grad_day.append(0)

            temp_grad_month += temp_grad_day[i]
            i += 1

        for day in range(1, month_range[1] + 1):
          for hour in range(0, 24):
            j = (day - 1) * 24 + hour
            monthly_demand = self._building.heating['month']['INSEL'][month-1]
            hourly_demand = float(monthly_demand)*float(temp_grad_day[j])/float(temp_grad_month)
            hourly_heating.append(hourly_demand)

      self._hourly_heating = pd.DataFrame(data=hourly_heating, columns=['monthly to hourly'])
    return self._hourly_heating

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