import pygame
import random

# Initialize Pygame
pygame.init()

# Constants
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
PLAYER_WIDTH = 50
PLAYER_HEIGHT = 50
ENEMY_WIDTH = 50
ENEMY_HEIGHT = 50
BULLET_WIDTH = 5
BULLET_HEIGHT = 10
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
PLAYER_SPEED = 5
ENEMY_SPEED = 3
BULLET_SPEED = 7

# Create the game window
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption("Shooting Game")

clock = pygame.time.Clock()

# Define the Player class
class Player(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = pygame.Surface([PLAYER_WIDTH, PLAYER_HEIGHT])
        self.image.fill(WHITE)
        self.rect = self.image.get_rect()
        self.rect.centerx = SCREEN_WIDTH // 2
        self.rect.centery = SCREEN_HEIGHT - 50

    def update(self):
        keys = pygame.key.get_pressed()
        if keys[pygame.K_LEFT]:
            self.rect.x -= PLAYER_SPEED
        if keys[pygame.K_RIGHT]:
            self.rect.x += PLAYER_SPEED

        # Keep the player inside the screen
        if self.rect.left < 0:
            self.rect.left = 0
        elif self.rect.right > SCREEN_WIDTH:
            self.rect.right = SCREEN_WIDTH

# Define the Enemy class
class Enemy(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = pygame.Surface([ENEMY_WIDTH, ENEMY_HEIGHT])
        self.image.fill(WHITE)
        self.rect = self.image.get_rect()
        self.rect.x = random.randint(0, SCREEN_WIDTH - ENEMY_WIDTH)
        self.rect.y = -ENEMY_HEIGHT

    def update(self):
        self.rect.y += ENEMY_SPEED
        if self.rect.top > SCREEN_HEIGHT:
            self.kill()

# Define the Bullet class
class Bullet(pygame.sprite.Sprite):
    def __init__(self, x, y):
        super().__init__()
        self.image = pygame.Surface([BULLET_WIDTH, BULLET_HEIGHT])
        self.image.fill(WHITE)
        self.rect = self.image.get_rect()
        self.rect.centerx = x
        self.rect.centery = y

    def update(self):
        self.rect.y -= BULLET_SPEED
        if self.rect.bottom < 0:
            self.kill()

# Create sprite groups
all_sprites = pygame.sprite.Group()
enemies = pygame.sprite.Group()
bullets = pygame.sprite.Group()

# Create player
player = Player()
all_sprites.add(player)

# Main game loop
running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_SPACE:
                bullet = Bullet(player.rect.centerx, player.rect.top)
                all_sprites.add(bullet)
                bullets.add(bullet)

    # Spawn enemies
    if random.randint(1, 100) == 1:
        enemy = Enemy()
        all_sprites.add(enemy)
        enemies.add(enemy)

    all_sprites.update()

    # Check for collisions
    for bullet in bullets:
        hit_enemies = pygame.sprite.spritecollide(bullet, enemies, True)
        for enemy in hit_enemies:
            bullet.kill()

    for enemy in enemies:
        if pygame.sprite.collide_rect(enemy, player):
            running = False

    screen.fill(BLACK)
    all_sprites.draw(screen)
    pygame.display.flip()
    clock.tick(60)

pygame.quit()