class Stats:
    score = 0
    level = 0
    bonus = 0
    lives = 0
    enemies = 0
    percent = 0
    field_count = 0
    bgcolor = (64,0,0,255)
    bordercolor = (0,0,0,255)
        
    @staticmethod
    def new_game():
        __class__.score = 0
        __class__.level = 1
        __class__.bonus = 20_000
        __class__.lives = 3
        __class__.percent = 100
        __class__.field_count = 1
        __class__.enemies = 3

    @staticmethod
    def level_up():
        __class__.score += __class__.calc_bonus()[0]
        __class__.bonus = 20_000
        __class__.percent = 100
        __class__.field_count = 1
        __class__.level += 1
        __class__.enemies = 3 + (__class__.level - 1) * 2
    
    @staticmethod
    def lose_life():
        __class__.lives -= 1
        return not __class__.lives

    @staticmethod
    def calc_bonus():
        level = __class__.level * 3_000
        life = __class__.lives * 1_000
        time = __class__.level * __class__.bonus
        area = __class__.level * int(max(20-__class__.percent,0) * 1_000)
        herd = (__class__.enemies - __class__.field_count) * 1_000
        total = level + area + time + life + herd
        return total, level, life, time, area, herd

    @staticmethod
    def update_bonus(dt):
        __class__.bonus = max(0, __class__.bonus - dt)