from enum import Enum
import numpy as np

from ..units import Position, Velocity, Mass, Acceleration

class Body:
    """
    Base class for any orbital body
    """
    def __init__(self, X: Position, V: Velocity, m: Mass):
        """
        x (position) and v (velocity) 
        """
        self.X = X
        self.V = V
        self.A = Acceleration([0,0,0])
        self.m = m

    def save(self):
        return (self.X, self.V, self.m)
    
    @classmethod
    def load(cls, tup):
        return cls(tup[0], tup[1], tup[2])

    def step(self, step_size: float):
        self.X = step_size*self.V
        self.V = step_size*self.A