import pygame
from pygame import locals
import random

pygame.init()  # 初始化

class Block(pygame.sprite.Sprite):
    def __init__(self,image1,image2,image3):
        super().__init__()
        # 加载障碍物的图片
        self.image = random.choice([image1, image2, image3])
        # 根据障碍物位图的宽高设置矩形
        self.rect = self.image.get_rect()
        # 障碍物绘制坐标
        self.rect.x = 1000
        self.rect.y = 500 - self.rect.height

class Player(pygame.sprite.Sprite):
    def __init__(self,image):
        super().__init__()
        self.image = image
        self.rect = self.image.get_rect()
        self.rect.x = 150
        self.rect.y = 400

# 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')]
index = 0   
y = 400
jumpState = "runing"
t = 30

bg_x = 0
road_x = 0
time = 0
gamestat = True

obstacle = Block(bush,cacti,stone)     # 创建障碍物
block_list = pygame.sprite.Group()     #创建精灵组

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"

    wukong = Player(hero[index])
    if jumpState == "runing":
        index += 1
        if index >= 5:
            index = 0

    if gamestat == True:
        if jumpState == "up":    # 起跳状态
            if t > 0:
                y -= t
                wukong.rect.y = y
                t -= 2
            else:
                jumpState = "down"  
        if jumpState == "down":    # 降落状态
            if t <= 30:
                y += t
                wukong.rect.y = y
                t += 2
            else:
                jumpState = "runing"
                t =30
    
    # 将背景图画上去
        bg_x -= 1
        if bg_x<=-1000:
            bg_x = 0
        screen.blit(background, (bg_x, 0))
        road_x -= 8
        if road_x<=-1000:
            road_x = 0
        screen.blit(road, (road_x, 500))

        screen.blit(wukong.image, (150, y))     # 悟空

        time += 1
        if time >= 60:
            time = 0
            num = random.randint(0,50)
            if num > 20:
                obstacle = Block(bush,cacti,stone)     # 创建障碍物精灵
                block_list.add(obstacle)

        for sprite in block_list:
            sprite.rect.x -= 8
            screen.blit(sprite.image,(sprite.rect.x,sprite.rect.y))
            if sprite.rect.x <= 0-sprite.rect.width:
                sprite.kill()
            if pygame.sprite.collide_rect(wukong,sprite):
                gameover = pygame.image.load('gameover.png')
                screen.blit(gameover,(400,200))
                gamestat = False
    # 刷新画面
        pygame.display.update()
        FPS.tick(30)