from math import radians, sin, cos, sqrt, atan2
from shapely import Polygon


# class PolygonChecker:
#     """
#     A class to check if a point is inside a polygon defined by its vertices.
#     The polygon is defined by a list of points (latitude, longitude).
#
#     """
#     def __init__(self, *points):
#         self.coords = points[:] if points else []
#         self.polygon = Polygon(self.coords)
#
#     def is_inside(self, point) -> bool:
#         return self.polygon.contains(point)

class CircleChecker:
    """
    A class to check if a point is inside a circle defined by its center and radius.
    The circle is defined by a center point (latitude, longitude) and a radius in meters
    """
    def __init__(self, center, radius_meters):
        self.center = center
        self.radius_meters = radius_meters

    def is_inside(self, point) -> bool:
        return is_inside_circle(self.center, point, self.radius_meters)


def is_inside_circle(center, point, radius_meters):
    R = 6371000  # Earth radius in meters
    lat1, lon1 = center
    lat2, lon2 = point

    dlat = radians(lat2 - lat1)
    dlon = radians(lon2 - lon1)

    a = sin(dlat / 2) ** 2 + cos(radians(lat1)) * cos(radians(lat2)) * sin(dlon / 2) ** 2
    c = 2 * atan2(sqrt(a), sqrt(1 - a))
    distance = R * c

    return distance <= radius_meters


# Default CircleChecker with a radius of 1000 meters
lido_circle_checker = CircleChecker((46.6770371, 11.1860135), 160)  # Center

# Default PolygonChecker with a predefined polygon
# polygon_coords = [
#     (46.677168, 11.185606),
#     (46.676910, 11.185692),
#     (46.676673, 11.186094),
#     (46.676691, 11.186630),
#     (46.676673, 11.187094),
#     (46.677309, 11.187242),
#     (46.677280, 11.185606)
# ]
#
# lido_polygon_checker = PolygonChecker(polygon_coords)