import pygame as pg
from sprite import Sprite

GREEN = (0,255,0)

class Gem(Sprite):
    RADIUS = 10
    def __init__(self, pos):
        size = (2*self.RADIUS,)*2
        super().__init__(size)
        rpos = (pos[0]- self.RADIUS, pos[1] - self.RADIUS)
        self.map_rect = pg.Rect(rpos, size)
        self.pos = pg.math.Vector2(pos)
        pg.draw.circle(self.image, GREEN, (self.RADIUS,)*2, self.RADIUS)


    def update(self, map_rect):
        self.rect.x = self.pos.x - map_rect.x - self.RADIUS
        self.rect.y = self.pos.y - map_rect.y - self.RADIUS

    def collide_ship(self, ship):
        rel_pos = self.pos - ship.map_rect.center
        if rel_pos.length() < ship.SIZE/2 + self.RADIUS:
            self.kill()