"""
Surface module
SPDX - License - Identifier: LGPL - 3.0 - or -later
Copyright © 2020 Project Author Guille Gutierrez guillermo.gutierrezmorote@concordia.ca
contributors Pilar Monsalvete Alvarez de Uribarri pilar.monsalvete@concordia.ca
"""

from __future__ import annotations
import numpy as np
import uuid
from city_model_structure.attributes.polygon import Polygon


class Surface:
  """
  Surface class
  """
  def __init__(self, solid_polygon, perimeter_polygon, holes_polygons=None, surface_type=None, swr=None):
    self._type = surface_type
    self._swr = swr
    self._name = None
    self._azimuth = None
    self._inclination = None
    self._area_above_ground = None
    self._area_below_ground = None
    self._parent = None
    self._bounds_lower_corner = None
    self._bounds_upper_corner = None
    self._shared_surfaces = []
    self._global_irradiance = dict()
    self._perimeter_polygon = perimeter_polygon
    self._holes_polygons = holes_polygons
    self._solid_polygons = solid_polygon

  @property
  def name(self):
    """
    Surface name
    :return: str
    """
    if self._name is None:
      self._name = uuid.uuid4()
    return self._name


  @property
  def swr(self):
    """
    Get surface short wave reflectance
    :return: float
    """
    return self._swr

  @swr.setter
  def swr(self, value):
    """
    Set surface short wave reflectance
    :param value: float
    :return: None
    """
    self._swr = value

  def _max_coord(self, axis):
    if axis == 'x':
      axis = 0
    elif axis == 'y':
      axis = 1
    else:
      axis = 2
    max_coordinate = ''
    for point in self.perimeter_polygon.points:
      if max_coordinate == '':
        max_coordinate = point[axis]
      elif max_coordinate < point[axis]:
        max_coordinate = point[axis]
    return max_coordinate

  def _min_coord(self, axis):
    if axis == 'x':
      axis = 0
    elif axis == 'y':
      axis = 1
    else:
      axis = 2
    min_coordinate = ''
    for point in self.perimeter_polygon.points:
      if min_coordinate == '':
        min_coordinate = point[axis]
      elif min_coordinate > point[axis]:
        min_coordinate = point[axis]
    return min_coordinate

  @property
  def bounds_lower_corner(self):
    if self._bounds_lower_corner is None:
      self._bounds_lower_corner = [self._min_coord('x'), self._min_coord('y'), self._min_coord('z')]
    return self._bounds_lower_corner

  @property
  def bounds_upper_corner(self):
    if self._bounds_upper_corner is None:
      self._bounds_upper_corner = [self._max_coord('x'), self._max_coord('y'), self._max_coord('z')]
    return self._bounds_upper_corner

  @property
  def area_above_ground(self):
    """
    Surface area above ground in square meters
    :return: float
    """
    if self._area_above_ground is None:
      self._area_above_ground = self.perimeter_polygon.area - self.area_below_ground
    return self._area_above_ground

  # todo: to be implemented
  @property
  def area_below_ground(self):
    """
    Surface area below ground in square meters
    :return: float
    """
    return 0.0

  @property
  def azimuth(self):
    """
    Surface azimuth in radians
    :return: float
    """
    if self._azimuth is None:
      normal = self.perimeter_polygon.normal
      self._azimuth = np.arctan2(normal[1], normal[0])
    return self._azimuth

  @property
  def inclination(self):
    """
    Surface inclination in radians
    :return: float
    """
    if self._inclination is None:
      self._inclination = np.arccos(self.perimeter_polygon.normal[2])
    return self._inclination

  @property
  def type(self):
    """
    Surface type Ground, Wall or Roof
    :return: str
    """
    if self._type is None:
      grad = np.rad2deg(self.inclination)
      if grad >= 170:
        self._type = 'Ground'
      elif 80 <= grad <= 100:
        self._type = 'Wall'
      else:
        self._type = 'Roof'
    return self._type

  @property
  def global_irradiance(self) -> dict:
    """
    global irradiance on surface in Wh/m2
    :return: dict{DataFrame(float)}
    """
    return self._global_irradiance

  @global_irradiance.setter
  def global_irradiance(self, value):
    """
    global irradiance on surface in Wh/m2
    :param value: dict{DataFrame(float)}
    """
    self._global_irradiance = value

  @property
  def perimeter_polygon(self) -> Polygon:
    """
    total surface defined by the perimeter, merging solid and holes
    :return: Polygon
    """
    return self._perimeter_polygon

  @property
  def solid_polygon(self) -> Polygon:
    """
    solid surface
    :return: Polygon
    """
    return self._solid_polygons

  @property
  def holes_polygons(self) -> [Polygon]:
    """
    hole surfaces, a list of hole polygons found in the surface
    :return: None, [] or [Polygon]
      None -> not known whether holes exist in reality or not due to low level of detail of input data
      [] -> no holes in the surface
      [Polygon] -> one or more holes in the surface
    """
    return self._holes_polygons