#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Mon Jan 27 16:32:02 2020

@author: suwako
"""

import numpy as np
import visual

class Mass():
    def __init__(self, pos=(0, 0), speed=(0, 0), mass=1):
        self.pos = np.array(pos, dtype='float64')
        self.speed = np.array(speed, dtype='float64')
        self.mass = mass
        self.G = 0.00000000001
        self.ticks=0

    def tick(self):
        self.pos += self.speed
        self.ticks+=1

    def ref(self,
            origin=np.array((0, 0), dtype='float64'),
            speed=np.array((0, 0), dtype='float64')):
        self.pos -= origin
        self.speed -= speed
        pass
    def apply_forces(self, elements):
        self.apply_gravity(elements)

    def apply_gravity(self, elements):
        for element in elements:
            d = element.pos - self.pos
            norm_d = np.linalg.norm(d)
            if norm_d != 0:
                u = d/norm_d
                norm = self.G * element.mass * (d[0]**2 + d[1]**2)
                self.speed += norm*u
    def fire(*a):
        pass


class Projectile(Mass):
    def __init__(self,
                 orientation=0,
                 pos=(0, 0),
                 speed=(0, 0),
                 mass=0.000000001):
        Mass.__init__(self, pos=pos, speed=speed, mass=mass)
        self.orientation = orientation


class Player(Mass):
    def __init__(self, keys={},
                 orientation=0,
                 pos=(0, 0),
                 speed=(0, 0),
                 mass=1,
                 thrust=0.01,
                 fire_force=1):
        Mass.__init__(self, pos=pos, speed=speed, mass=mass)
        self.orientation = orientation
        self.actions = {"thrust": False, "fire": False}
        self.thrust=thrust
        self.fire_force=fire_force

    def action(self, **kwargs):
        print(kwargs)
        self.actions.update(kwargs)
    
    def apply_thrust(self):
        if self.actions['thrust']:
            orientation = np.deg2rad(self.orientation + 90)
            or_tuple=(np.cos(orientation), -np.sin(orientation))
            norm = self.thrust/self.mass
            self.speed += norm * np.array(or_tuple, dtype='float64')
    
    def apply_forces(self, elements):
        Mass.apply_forces(self, elements)
        self.apply_thrust()
    
    def fire(self, elements):
        if self.actions['fire']:
            projectile = visual.Projectile(orientation=self.orientation,
                                          pos=self.pos,
                                          speed=self.speed)
            orientation = np.deg2rad(self.orientation + 90)
            or_tuple=(np.cos(orientation), -np.sin(orientation))
            pnorm = self.fire_force/projectile.mecha.mass
            snorm = self.fire_force/self.mass
            projectile.mecha.speed += snorm * np.array(or_tuple, dtype='float64')
            self.speed -= snorm * np.array(or_tuple, dtype='float64')
            elements.append(projectile)
            self.actions['fire'] = False

if __name__ == "__main__":
    pass