import random

import pygame
import os

game_folder = os.path.dirname(__file__)
img_folder = os.path.join(game_folder, 'img')

WIDTH = 720 #ШИРИНА ИГРОВОГО ОКНА
HEIGHT = 980#ВЫСОТА
FPS = 30 #КАДРЫ В СЕКУНДУ

WHITE = (255,255,255) #БЕЛЫЙ
BLACK = (0,0,0) #ЧЕРНЫЙ
RED =  (255,0,0)#КРАСНЫЙ
GREEN = (0,255,0)#ЗЕЛЕНЫЙ
BLUE = (0,0,255) #СИНИЙ
VIOLET = (238,130,238) #ЦВЕТ НА ВЫБОР
YELLOW = (255,255,0)

class Player(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        #self.image = pygame.Surface((40,40))

        self.image = pygame.image.load('player.png')
        #self.image.fill(RED)
        self.rect = self.image.get_rect()
        self.rect.centerx = WIDTH / 2
        self.rect.bottom = HEIGHT - 10


        self.speedx = 0

    def update(self):
        self.speedx = 0

        keystate = pygame.key.get_pressed()
        if keystate[pygame.K_a]:
            self.speedx = -16
        if keystate[pygame.K_d]:
            self.speedx = 16

        self.rect.x += self.speedx

        if self.rect.right > WIDTH:
            self.rect.right = WIDTH
        if self.rect.left < 0:
            self.rect.left = 0

    def shoot(self):
        bullet = Bullet(self.rect.centerx, self.rect.top)
        all_sprites.add(bullet)
        bullets.add(bullet)

class Mob(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)

        self.image = pygame.image.load('mob.png')
        #self.image = pygame.Surface((40, 40))
        #self.image.fill(GREEN)

        self.rect = self.image.get_rect()

        self.rect.x = random.randrange(WIDTH -  self.rect.width)
        self.rect.y = random.randrange(-100, -40)

        self.speedy = random.randrange(8,16)
        self.speedx = random.randrange(-3, 3)

    def update(self):
        self.rect.x += self.speedx
        self.rect.y += self.speedy

        if self.rect.top > HEIGHT + 10 or self.rect.left < -25 or self.rect.right > WIDTH + 20:
            self.rect.x = random.randrange(WIDTH - self.rect.width)
            self.rect.y = random.randrange(-100, -40)
            self.speedy = random.randrange(1, 8)


class Bullet(pygame.sprite.Sprite):
    def __init__(self, x, y):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.Surface((10, 20))
        self.image.fill(YELLOW )
        self.rect = self.image.get_rect()
        self.rect.bottom = y
        self.rect.centerx = x
        self.speedy = -30

    def update(self):
        self.rect.y += self.speedy
        if self.rect.bottom < 0:
            self.kill()


pygame.init()
pygame.mixer.init()

screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("UFO Killer")

clock = pygame.time.Clock()

all_sprites = pygame.sprite.Group()
bullets = pygame.sprite.Group()
player = Player()
all_sprites.add(player)

mobs = pygame.sprite.Group()
for i in range(8):
    m = Mob()
    all_sprites.add(m)
    mobs.add(m)

running = True
while running:
    clock.tick(FPS)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_SPACE:
                player.shoot()


    all_sprites.update()

    hits = pygame.sprite.groupcollide(mobs, bullets, True, True)
    for hit in hits:
        m = Mob()
        all_sprites.add(m)
        mobs.add(m)


    hits = pygame.sprite.spritecollide(player, mobs, False)
    if hits:
        running = False
    screen.fill(BLACK)
    all_sprites.draw(screen)

    pygame.display.flip()

pygame.quit()