#novel_generator/common.py
# -*- coding: utf-8 -*-
"""
通用重试、清洗、日志工具
"""
import logging
import re
import time
import traceback

def call_with_retry(func, max_retries=3, sleep_time=2, fallback_return=None, **kwargs):
    """
    通用的重试机制封装。
    :param func: 要执行的函数
    :param max_retries: 最大重试次数
    :param sleep_time: 重试前的等待秒数
    :param fallback_return: 如果多次重试仍失败时的返回值
    :param kwargs: 传给func的命名参数
    :return: func的结果，若失败则返回 fallback_return
    """
    for attempt in range(1, max_retries + 1):
        try:
            return func(**kwargs)
        except Exception as e:
            logging.warning(f"[call_with_retry] Attempt {attempt} failed with error: {e}")
            traceback.print_exc()
            if attempt < max_retries:
                time.sleep(sleep_time)
            else:
                logging.error("Max retries reached, returning fallback_return.")
                return fallback_return

def remove_think_tags(text: str) -> str:
    """移除 <think>...</think> 包裹的内容"""
    return re.sub(r'<think>.*?</think>', '', text, flags=re.DOTALL)

def debug_log(prompt: str, response_content: str):
    logging.info(
        f"\n[#########################################  Prompt  #########################################]\n{prompt}\n"
    )
    logging.info(
        f"\n[######################################### Response #########################################]\n{response_content}\n"
    )

def invoke_with_cleaning(llm_adapter, prompt: str) -> str:
    """
    增强版调用方法，支持自定义prompt结构
    """
    def _invoke(prompt):
        return llm_adapter.invoke(prompt)

    response = call_with_retry(func=_invoke, max_retries=3, fallback_return="", prompt=prompt)
    
    if not response:
        logging.warning("No response from model after retry. Return empty.")
        return ""
    
    # 增强清洗逻辑
    cleaned_text = remove_think_tags(response)
    
    # 移除可能的多余标记
    cleaned_text = re.sub(r'^```markdown\s*', '', cleaned_text, flags=re.IGNORECASE)
    cleaned_text = re.sub(r'\s*```$', '', cleaned_text)
    
    debug_log(prompt, cleaned_text)
    return cleaned_text.strip()