import time


class BackBoardManager:
    def __init__(self):
        self.backboards = {} # user_id: Backboard
    
    def add_backboard(self, user_id, folder):
        self.backboards[user_id] = Backboard(user_id, folder)

    def get_backboard(self, user_id):
        if user_id not in self.backboards:
            return None
        return self.backboards[user_id]




class Backboard:
    def __init__(self, user_id, folder):
        self.user_id = user_id
        self.folder = folder
        self.create_time = time.time()
        self.enter_chapter_time = time.time()

    def next_chapter(self):
        self.enter_chapter_time = time.time()

    def get_info_prompt(self):
        return f"###Global Info:###\n\
User is {self.user_id}\n\
User's total study time is {self.get_deltatime_mmss(self.create_time, time.time())}\n\
User's current chapter study time is {self.get_deltatime_mmss(self.enter_chapter_time, time.time())}\n\
\n\n\
"





    def get_deltatime_mmss(self, start_time, end_time):
        elapsed_time = end_time - start_time
        hours = int(elapsed_time // 3600)
        minutes = int((elapsed_time % 3600) // 60)
        seconds = int(elapsed_time % 60)
        return f"{hours:02d}:{minutes:02d}:{seconds:02d}"