import pygame.font
from pygame.sprite import Group

from man import Man

class Scoreboard():
    """创建一个分数的类"""

    def __init__(self, ai_settings, screen, stats):
        """初始化计分属性"""
        self.screen = screen
        self.screen_rect = screen.get_rect()
        self.ai_settings = ai_settings
        self.stats = stats
        
        # 设置分数信息的字体
        self.text_color = (30, 30, 30)
        self.font = pygame.font.SysFont(None, 48)

        # 准备初始化分数
        self.prep_score()
        self.prep_high_score()
        self.prep_level()
        self.prep_mans()

    def prep_score(self):
        """将分数转换成渲染图象"""
        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)
            
        # 在屏幕右上角显示分数
        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)
                
        # 将最高分居中显示在屏幕顶部
        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):
        """将标高转换为渲染图像"""
        self.level_image = self.font.render(str(self.stats.level), True,
                self.text_color, self.ai_settings.bg_color)
        
        # 将级别定位在分数以下
        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_mans(self):
        """显示还剩下多少艘船"""
        self.mans = Group()
        for man_number in range(self.stats.mans_left):
            man = Man(self.ai_settings, self.screen)
            man.rect.x = 10 + man_number * man.rect.width
            man.rect.y = 10
            self.mans.add(man)
        
    def show_score(self):
        """在屏幕上画分数"""
        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)
        # 绘制人
        self.mans.draw(self.screen)