from pathlib import Path
import pandas as pd
import hub.helpers.constants as cte


class Results:
  def __init__(self, city, path):
    self._city = city
    self._path = path

  def print(self):
    print_results = None
    file = 'city name: ' + self._city.name + '\n'
    for building in self._city.buildings:
      if cte.MONTH in building.heating.keys():
        heating_results = building.heating[cte.MONTH].rename(columns={cte.INSEL_MEB: f'{building.name} heating Wh'})
        cooling_results = building.cooling[cte.MONTH].rename(columns={cte.INSEL_MEB: f'{building.name} cooling Wh'})
        lighting_results = building.lighting_electrical_demand[cte.MONTH]\
          .rename(columns={cte.INSEL_MEB: f'{building.name} lighting electrical demand Wh'})
        appliances_results = building.appliances_electrical_demand[cte.MONTH]\
          .rename(columns={cte.INSEL_MEB: f'{building.name} appliances electrical demand Wh'})
        dhw_results = building.domestic_hot_water_heat_demand[cte.MONTH]\
          .rename(columns={cte.INSEL_MEB: f'{building.name} domestic hot water demand Wh'})
      else:
        array = [None] * 12
        heating_results = pd.DataFrame(array, columns=[f'{building.name} heating Wh'])
        cooling_results = pd.DataFrame(array, columns=[f'{building.name} cooling Wh'])
        lighting_results = pd.DataFrame(array, columns=[f'{building.name} lighting electrical demand Wh'])
        appliances_results = pd.DataFrame(array, columns=[f'{building.name} appliances electrical demand Wh'])
        dhw_results = pd.DataFrame(array, columns=[f'{building.name} domestic hot water demand Wh'])
      if print_results is None:
        print_results = heating_results
      else:
        print_results = pd.concat([print_results, heating_results], axis='columns')
      print_results = pd.concat([print_results,
                                 cooling_results,
                                 lighting_results,
                                 appliances_results,
                                 dhw_results], axis='columns')
      file += '\n'
      file += f'name: {building.name}\n'
      file += f'year of construction: {building.year_of_construction}\n'
      file += f'function: {building.function}\n'
      file += f'floor area: {building.floor_area}\n'
      if building.average_storey_height is not None and building.eave_height is not None:
        file += f'storeys: {int(building.eave_height / building.average_storey_height)}\n'
      else:
        file += f'storeys: n/a\n'
      file += f'heated_volume: {0.85 * building.volume}\n'
      file += f'volume: {building.volume}\n'

    full_path_results = Path(self._path / 'demand.csv').resolve()
    print_results.to_csv(full_path_results, na_rep='null')
    full_path_metadata = Path(self._path / 'metadata.csv').resolve()
    with open(full_path_metadata, 'w') as metadata_file:
      metadata_file.write(file)