"""
请求日志记录器 - 记录每个语音对话请求的详细信息
"""
import os
import time
from datetime import datetime
from threading import Lock
from typing import Optional


class RequestLogger:
    """请求日志记录器（线程安全）"""
    
    def __init__(self, log_file: str = "conversation_log.txt"):
        """
        初始化日志记录器
        
        Args:
            log_file: 日志文件路径
        """
        self.log_file = log_file
        self.lock = Lock()
        
        # 如果文件不存在，创建并写入表头
        if not os.path.exists(log_file):
            self._write_header()
    
    def _write_header(self):
        """写入日志文件表头"""
        with open(self.log_file, 'w', encoding='utf-8') as f:
            f.write("=" * 120 + "\n")
            f.write("Tolan AI 对话日志\n")
            f.write("格式: 时间 | 用户语音文本 | 录音结束→首个音频时间(ms) | AI输出文本\n")
            f.write("=" * 120 + "\n\n")
    
    def log_request(
        self, 
        user_text: str, 
        ai_response: str, 
        first_audio_latency: Optional[float] = None,
        request_id: Optional[str] = None
    ):
        """
        记录一条对话请求
        
        Args:
            user_text: 用户语音识别的文本
            ai_response: AI的完整回复文本
            first_audio_latency: 录音结束到首个音频的延迟(毫秒)
            request_id: 请求ID（可选）
        """
        with self.lock:
            # 获取当前时间
            timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
            
            # 处理延迟信息
            latency_str = f"{first_audio_latency:.0f}ms" if first_audio_latency else "N/A"
            
            # 清理文本（移除换行符，保持单行）
            user_text_clean = user_text.replace('\n', ' ').replace('\r', ' ').strip()
            ai_response_clean = ai_response.replace('\n', ' ').replace('\r', ' ').strip()
            
            # 构建日志行
            log_line = f"{timestamp} | {user_text_clean} | {latency_str} | {ai_response_clean}\n"
            
            # 写入文件
            try:
                with open(self.log_file, 'a', encoding='utf-8') as f:
                    f.write(log_line)
                    
                print(f"📝 已记录对话日志 [{request_id or 'unknown'}]: {user_text_clean[:20]}... → {ai_response_clean[:20]}...")
            except Exception as e:
                print(f"⚠️ 写入日志失败: {e}")
    
    def log_error(self, user_text: str, error_message: str, request_id: Optional[str] = None):
        """
        记录错误请求
        
        Args:
            user_text: 用户语音识别的文本
            error_message: 错误信息
            request_id: 请求ID（可选）
        """
        with self.lock:
            timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
            user_text_clean = user_text.replace('\n', ' ').replace('\r', ' ').strip()
            error_clean = error_message.replace('\n', ' ').replace('\r', ' ').strip()
            
            log_line = f"{timestamp} | {user_text_clean} | ERROR | {error_clean}\n"
            
            try:
                with open(self.log_file, 'a', encoding='utf-8') as f:
                    f.write(log_line)
                    
                print(f"📝 已记录错误日志 [{request_id or 'unknown'}]: {error_clean}")
            except Exception as e:
                print(f"⚠️ 写入错误日志失败: {e}")


# 全局单例
request_logger = RequestLogger()