from imports.geometry.citygml_base import CityGmlBase
from city_model_structure.attributes.surface import Surface
from city_model_structure.attributes.polygon import Polygon
from imports.geometry.helpers.geometry_helper import GeometryHelper

class CityGmlLod2(CityGmlBase):


  def __init__(self, o):
    super().__init__()
    self._o = o
    self._surfaces = self._identify(self._o)

  @classmethod
  def _identify(cls, o):
    if 'lod2Solid' in o['Building']:
      return cls._solid(o)
    elif 'lod2MultiSurface' in o['Building']:
      print('multi_surface')
      return cls._multi_surface(o)
    elif 'lod2MultiCurve' in o['Building']:
      print('multi_curve')
      return cls._multi_curve(o)
    elif 'consistsOfBuildingPart' in o['Building']:
      raise NotImplementedError


  @staticmethod
  def _surface_encoding(surfaces):
    if 'lod2MultiSurface' in surfaces:
      return 'lod2MultiSurface', 'MultiSurface'
    return 'unknown'

  @classmethod
  def _solid(cls, o):
    surfaces = []
    for b in o["Building"]["boundedBy"]:
      surface_type = next(iter(b))
      surface_encoding, surface_subtype = cls._surface_encoding(b[surface_type])
      for member in b[surface_type][surface_encoding][surface_subtype]['surfaceMember']:
        sp = cls._solid_points(cls._remove_last_point(member['Polygon']['exterior']['LinearRing']['posList']))
        p = Polygon(sp)
        surface = Surface(p,p, surface_type=GeometryHelper.gml_surface_to_libs(surface_type))
        surfaces.append(surface)
    return surfaces


  @classmethod
  def _multi_curve(cls, o):
    raise NotImplementedError

  @classmethod
  def _multi_surface(cls, o):
    raise NotImplementedError


  @classmethod
  def _lod2(cls, bound):
    surfaces = []
    for surface_type in iter(bound):
      for s in bound[surface_type]['lod2MultiSurface']['MultiSurface']['surfaceMember']:
        if 'CompositeSurface' in s:
          surfaces = surfaces + cls._lod2_composite_surface(s)
        else:
          surfaces = surfaces + cls._lod2_multi_surface(s, surface_type)
    return surfaces

  @classmethod
  def _lod2_solid_multi_surface(cls, o):
    polygons = None
    if 'boundedBy' in o['Building']['consistsOfBuildingPart']['BuildingPart']:
      if 'RoofSurface' in o['Building']['consistsOfBuildingPart']['BuildingPart']['boundedBy']:
        if o['Building']['consistsOfBuildingPart']['BuildingPart']['boundedBy']['RoofSurface']['lod2MultiSurface'] != 'None':
          polygons = [Polygon(cls._remove_last_point(s['Polygon']['exterior']['LinearRing']['posList']))
                    for s in o['Building']['consistsOfBuildingPart']['BuildingPart']['boundedBy']['RoofSurface']
                      ['lod2MultiSurface']['MultiSurface']['surfaceMember']]

      elif 'WallSurface' in o['Building']['consistsOfBuildingPart']['BuildingPart']['boundedBy']:
        if o['Building']['consistsOfBuildingPart']['BuildingPart']['boundedBy']['WallSurface']['lod2MultiSurface'] != 'None':
          polygons = [Polygon(cls._remove_last_point(s['Polygon']['exterior']['LinearRing']['posList']))
                    for s in o['Building']['consistsOfBuildingPart']['BuildingPart']['boundedBy']['WallSurface']['lod2MultiSurface']['MultiSurface']['surfaceMember']]
    else:
      polygons = [Polygon(cls._remove_last_point(s['Polygon']['exterior']['LinearRing']['posList']))
                  for s in o['Building']['lod2MultiSurface']['MultiSurface']['surfaceMember']]
    return [Surface(p,p) for p in polygons]


  @classmethod
  def _lod2_solid(cls, o):
    for walls in o['Building']['boundedBy']['wallSurface']:
      print(f'solid')

  @classmethod
  def _lod2_solid_composite_surface(cls, o):
    try:
      solid_points = [cls._solid_points(cls._remove_last_point(s['Polygon']['exterior']['LinearRing']['posList']['#text']))
                  for s in o['Building']['lod2Solid']['Solid']['exterior']['CompositeSurface']['surfaceMember']]
    except TypeError:
      solid_points = [cls._solid_points(cls._remove_last_point(s['Polygon']['exterior']['LinearRing']['posList']))
                  for s in o['Building']['lod2Solid']['Solid']['exterior']['CompositeSurface']['surfaceMember']]
    return [Surface(Polygon(sp),Polygon(sp)) for sp in solid_points]

  @classmethod
  def _lod2_composite_surface(cls, s):
    solid_points = [
      cls._solid_points((cls._remove_last_point(sm['Polygon']['exterior']['LinearRing']['posList'])))
      for sm in s['CompositeSurface']['surfaceMember']]
    return [Surface(Polygon(sp), Polygon(sp)) for sp in solid_points]

  @classmethod
  def _lod2_multi_surface(cls, s, surface_type):
    # todo: this need to be changed into surface bounded?
    try:
      solid_points = [cls._solid_points(cls._remove_last_point(
        s['Polygon']['exterior']['LinearRing']['posList']['#text']))]
    except TypeError:
      solid_points = [cls._solid_points(cls._remove_last_point(s['Polygon']['exterior']['LinearRing']['posList']))]
    return [Surface(Polygon(sp), Polygon(sp), surface_type=surface_type) for sp in solid_points]