import pygame
from pygame import locals
import random

class Block(pygame.sprite.Sprite):
    def __init__(self,image1,image2,image3):
        super().__init__()
        self.image=random.choice([image1,image2,image3])
        self.rect=self.image.get_rect()
        self.rect.x=1000
        self.rect.y=500-self.rect.height
pygame.init()  # 初始化
# 创建一个窗口
screen = pygame.display.set_mode((1000, 600))
FPS = pygame.time.Clock()  # pygame时钟，控制游戏速度（帧数）
pygame.display.set_caption("悟空酷跑")
# 载入图片
background = pygame.image.load('bg.png')    # 背景
road = pygame.image.load('road.png')      # 路
stone = pygame.image.load('stone.png')      # 石头
cacti = pygame.image.load('cacti.png')      # 仙人掌
bush = pygame.image.load('bush.png')      # 灌木丛
hero = [pygame.image.load('hero1.png'),
        pygame.image.load('hero2.png'),
        pygame.image.load('hero3.png'),
        pygame.image.load('hero4.png'),
        pygame.image.load('hero5.png')]
lu_x=0
shan_x=0
index = 0   
y = 400
jumpState = "runing"
t = 30
bg_x=0
road_x=0
aa=Block(bush,cacti,stone)

while True:
    for event in pygame.event.get():
        if event.type == locals.QUIT:
            # 接收到退出事件后退出程序
            exit()
        if event.type == locals.KEYDOWN:
            if jumpState == "runing":
                if event.key == locals.K_SPACE:
                    jumpState = "up"

    if jumpState == "up":    # 起跳状态
        if t > 0:
            y -= t
            t -= 2
        else:
            jumpState = "down"  
    if jumpState == "down":    # 降落状态
        if t <= 30:
            y += t
            t += 2
        else:
            jumpState = "runing"
            t =30
    
    # 悟空造型
    wukong = hero[index]
    if jumpState == "runing":       # 跑步状态下
        index += 1
        if index >= 5:
            index = 0
    # 将背景图画上去
    shan_x -=2
    if shan_x <-1000:
        shan_x=0
    screen.blit(background, (shan_x, 0))     # 远处背景
    lu_x -=8
    if lu_x <-1000:
        lu_x=0
    screen.blit(road, (lu_x, 500))     # 路
    bg_x-=1
    if bg_x<=-1000:
        bg_x=0
        screen.blit(background,(bg_x,0))
        road_x-=8
    if  road_x=0
    screen.blit(road,(road_x,500))
    screen.blit(wukong, (150, y))     # 悟空

    if aa.rect.x <= 0-aa.rect.width:      # 障碍物消失
        # 创建障碍物对象
        aa=Block(bush,cacti,stone)
    aa.rect.x -= 8

 
    screen.blit(aa.image, (aa.rect.x, aa.rect.y)) 
    # 刷新画面
    pygame.display.update()
    FPS.tick(60)