import pygame
import random
import sys

# Initialize Pygame
pygame.init()

# Constants
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
RED = (255, 0, 0)
FONT = pygame.font.Font(None, 36)

# Player properties
player_size = 50
player_pos = [SCREEN_WIDTH // 2, SCREEN_HEIGHT - 2 * player_size]
player_speed = 10

# Obstacle properties
obstacle_size = 50
obstacle_pos = [random.randint(0, SCREEN_WIDTH - obstacle_size), 0]
obstacle_list = [obstacle_pos]
obstacle_speed = 5

# Score
score = 0

# Initialize the screen
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption("Dodger Game")

# Clock to control the frame rate
clock = pygame.time.Clock()

# Function to create obstacles
def create_obstacles():
    delay = random.random()
    if delay < 0.1:
        x_pos = random.randint(0, SCREEN_WIDTH - obstacle_size)
        y_pos = 0
        obstacle_list.append([x_pos, y_pos])

# Function to move obstacles
def move_obstacles():
    global score
    for idx, obstacle in enumerate(obstacle_list):
        if obstacle[1] >= 0 and obstacle[1] < SCREEN_HEIGHT:
            obstacle[1] += obstacle_speed
            score += 1
        else:
            obstacle_list.pop(idx)

# Function to draw obstacles
def draw_obstacles():
    for obstacle in obstacle_list:
        pygame.draw.rect(screen, BLACK, (obstacle[0], obstacle[1], obstacle_size, obstacle_size))

# Function to update the screen
def update_screen():
    screen.fill(WHITE)
    draw_obstacles()
    pygame.draw.rect(screen, RED, (player_pos[0], player_pos[1], player_size, player_size))
    draw_text("Score: " + str(score), FONT, BLACK, 10, 10)
    pygame.display.update()

# Function to draw text
def draw_text(text, font, color, x, y):
    text_surface = font.render(text, True, color)
    screen.blit(text_surface, (x, y))

# Main game loop
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        player_pos[0] -= player_speed
    if keys[pygame.K_RIGHT]:
        player_pos[0] += player_speed

    create_obstacles()
    move_obstacles()
    update_screen()

    # Collision detection
    for obstacle in obstacle_list:
        if (obstacle[1] >= player_pos[1] and obstacle[1] <= player_pos[1] + player_size) or \
           (obstacle[1] + obstacle_size >= player_pos[1] and obstacle[1] + obstacle_size <= player_pos[1] + player_size):
            if (obstacle[0] >= player_pos[0] and obstacle[0] <= player_pos[0] + player_size) or \
               (obstacle[0] + obstacle_size >= player_pos[0] and obstacle[0] + obstacle_size <= player_pos[0] + player_size):
                pygame.quit()
                sys.exit()

    # Set frame rate
    clock.tick(30)