import pygame.font
from pygame.sprite import Group
from ship import Ship
class Scoreboard():
	#显示得分信息的类
	def __init__(self,ai_settings,screen,stats):
		#初始化得分涉及的属性
		self.screen=screen 
		self.screen_rect=screen.get_rect()
		self.ai_settings=ai_settings
		self.stats=stats
		#显示得分时使用的字体设置
		self.text_color=(30,30,30)
		self.font=pygame.font.SysFont(None,48)
		#准备包含最高得分和当前得分的图像
		self.prep_score()
		self.prep_high_score()
		self.prep_level()
		self.prep_ships()
	def prep_score(self):
		#将得分转换为一幅渲染的图像
		rounded_score=int(round(self.stats.score,-1))
		score_str="{:,}".format(rounded_score)
		self.score_image=self.font.render(score_str,True,self.text_color,self.ai_settings.bg_color)
		self.score_rect=self.score_image.get_rect()
		self.score_rect.right=self.screen_rect.right-20
		self.score_rect.top=20
	def prep_high_score(self):
		#将最高分转换为图像
		high_score=int(round(self.stats.high_score,-1))
		high_score_str="{:,}".format(high_score)
		self.high_score_image=self.font.render(high_score_str,True,self.text_color,self.ai_settings.bg_color)
		#将最高得分放在屏幕顶部中央
		self.high_score_rect=self.high_score_image.get_rect()
		self.high_score_rect.centerx=self.screen_rect.centerx
		self.high_score_rect.top=self.score_rect.top
	def prep_level(self):
		#将等级渲染为图像
		self.level_image=self.font.render(str(self.stats.level),True,self.text_color,self.ai_settings.bg_color)
		#将等级放在得分下方
		self.level_rect=self.level_image.get_rect()
		self.level_rect.right=self.score_rect.right
		self.level_rect.top=self.score_rect.bottom+10

	def prep_ships(self):
		#显示剩余飞船
		self.ships=Group()
		for ship_number in range(self.stats.ships_left):
			ship = Ship(self.ai_settings, self.screen)
			ship.rect.x = 10 + ship_number * ship.rect.width
			ship.rect.y = 10
			self.ships.add(ship)
			
	def show_score(self):
		#在屏幕上显示当前得分和最高得分
		self.screen.blit(self.score_image,self.score_rect)
		self.screen.blit(self.high_score_image,self.high_score_rect)
		self.screen.blit(self.level_image,self.level_rect)
		#绘制飞船
		self.ships.draw(self.screen)
