from dataclasses import dataclass
from math import cos, asin, sqrt, pi
from math import radians

from typing_extensions import Self


@dataclass(eq=True, frozen=True)
class GeoLocation:
	lat: float
	lon: float

	@property
	def ballVector(self) -> tuple[float, float]:
		return radians(self.lat), radians(self.lon)

	@property
	def vector(self) -> tuple[float, float]:
		return self.lat, self.lon

	def distance(self, geoLocation: Self) -> float:
		r = 6371000 # m
		p = pi / 180

		a = 0.5 - cos((geoLocation.lat-self.lat)*p)/2 + cos(self.lat*p) * cos(geoLocation.lat*p) * (1-cos((geoLocation.lon-self.lon)*p))/2
		return 2 * r * asin(sqrt(a))