from geometry.geometry_factory import GeometryFactory
from physics.physics_factory import PhysicsFactory
from usage.usage_factory import UsageFactory
import pyproj
import reverse_geocoder as rg


class Init:
  def __init__(self, geometry_path):
    self._geometry_path = geometry_path
    self._city = None
    # todo: right now extracted at city level, in the future should be extracted also at building level if exist
    self._location = None

  @property
  def location(self):
    if self._location is None:
      gps = pyproj.CRS('EPSG:4326')  # LatLon with WGS84 datum used by GPS units and Google Earth
      input_reference = None
      try:
        input_reference = pyproj.CRS(self._city.srs_name)  # Projected coordinate system from input data
      except pyproj.exceptions.CRSError:
        print('Invalid projection reference system, please check the input data. (e.g. in CityGML files: srs_name)')
        quit()

      coordinates = pyproj.transform(input_reference, gps, self._city.lower_corner[0], self._city.lower_corner[1])
      self._location = rg.search(coordinates)
    return self._location

  @property
  def handler(self):
    if self.city_name == 'New York City':
      handler = '{0}_{1}'
      return handler.format(self.country_code, self.city_name.lower().replace(' ', '_'))
    return self.country_code

  @property
  def country_code(self):
    return self.location[0]['cc']

  @property
  def city_name(self):
    if self._city.name is None:
      self._city.name = self.location[0]['name']
    return self._city.name

  @property
  def city(self):
    if self._city is None:
      self._city = GeometryFactory('citygml', self._geometry_path).city
      PhysicsFactory(self.handler, self._city)
      UsageFactory(self.handler, self._city)
    return self._city