#!/usr/bin/env python
# -*- coding: utf-8 -*-

import os
import sys
import random

import pygame
from pygame.locals import *

DIRECTORIOBASE = os.path.dirname(__file__)
'''
IMAGEN_NAVE = os.path.join(DIRECTORIOBASE,
    'Imagenes', 'Naves', 'Nave.png')
    
IMAGEN_NAVE_ENEMIGA = os.path.join(DIRECTORIOBASE,
    'Imagenes', 'Naves', 'enemy02.png')'''
    
IMAGEN_BALA = os.path.join(DIRECTORIOBASE,
    'Imagenes', 'Bala.png')
    
class Nave(pygame.sprite.Sprite):
    """Nave."""
    
    def __init__(self, imagen, jugador):
        
        pygame.sprite.Sprite.__init__(self)
        
        self.jugador = jugador
        self.image = pygame.image.load(imagen)
        self.rect = self.image.get_rect()
        
        self.w = pygame.display.Info().current_w
        self.h = pygame.display.Info().current_h
        
        self.rect.center = (self.w/2, self.h/2)
 
class Enemigo(Nave):
    """Nave."""
    
    def __init__(self):
        
        Nave.__init__(self)
        
        self.image = pygame.image.load(IMAGEN_NAVE_ENEMIGA)
        self.rect = self.image.get_rect()
        
        random.seed()
        
        self.rect.center = (random.randrange(0,
            pygame.display.Info().current_w), 0)
        
    def update(self):
        
        w = pygame.display.Info().current_w
        
        random.seed()
        mov = random.choice([-5, 0, 5])
        x = self.rect.x + mov
        
        if x < w and x > 0:
            self.rect.x += mov
            
class Bala(pygame.sprite.Sprite):
    
    def __init__(self, propietario):
    
       pygame.sprite.Sprite.__init__(self)
    
       self.propietario = propietario
       self.image = pygame.image.load(IMAGEN_BALA)
       self.rect = self.image.get_rect()
    
       xnave = self.propietario.nave.rect.x
       ynave = self.propietario.nave.rect.y
       wnave = self.propietario.nave.rect.w
       hnave = self.propietario.nave.rect.h
       
       self.rect.x = xnave + wnave / 2 - self.rect.w / 2
       self.rect.y = ynave - self.rect.h/2
    
    def update(self):
    
        if self.rect.y <= 0:
            self.kill()
        else:
            self.rect.y -= 10