#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
EXE文件日志器 - 将所有输出重定向到文件
适用于 pyinstaller -w 打包的exe
"""

import sys
import os
from datetime import datetime
import threading

class FileLogger:
    """文件日志器类"""
    
    def __init__(self):
        # 确定日志文件路径
        if getattr(sys, 'frozen', False):
            # 打包环境
            self.log_dir = os.path.dirname(sys.executable)
        else:
            # 开发环境
            self.log_dir = os.getcwd()
        
        # 创建日志文件
        timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
        self.log_file = os.path.join(self.log_dir, f"MultiPlatformGUI_{timestamp}.log")
        
        # 线程锁，确保多线程写入安全
        self.lock = threading.Lock()
        
        # 初始化日志文件
        self.write_log("=" * 80)
        self.write_log("多平台客服GUI日志开始")
        self.write_log(f"Python版本: {sys.version}")
        self.write_log(f"是否打包环境: {getattr(sys, 'frozen', False)}")
        self.write_log(f"日志文件: {self.log_file}")
        self.write_log("=" * 80)
    
    def write_log(self, message):
        """写入日志到文件"""
        try:
            with self.lock:
                timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S.%f")[:-3]
                log_entry = f"[{timestamp}] {message}\n"
                
                with open(self.log_file, 'a', encoding='utf-8') as f:
                    f.write(log_entry)
                    f.flush()
                    os.fsync(f.fileno())  # 强制写入磁盘
        except Exception as e:
            # 如果写入失败，至少尝试输出到stderr
            try:
                sys.stderr.write(f"LOG_ERROR: {message} | Error: {e}\n")
                sys.stderr.flush()
            except:
                pass
    
    def write(self, text):
        """实现write方法以支持作为sys.stdout使用"""
        if text.strip():  # 只记录非空内容
            self.write_log(text.strip())
    
    def flush(self):
        """实现flush方法"""
        pass

class TeeOutput:
    """同时输出到原始输出和文件的类"""
    
    def __init__(self, original, file_logger):
        self.original = original
        self.file_logger = file_logger
    
    def write(self, text):
        # 写入原始输出（如果存在）
        if self.original:
            try:
                self.original.write(text)
                self.original.flush()
            except:
                pass
        
        # 写入文件日志
        if text.strip():
            self.file_logger.write_log(text.strip())
    
    def flush(self):
        if self.original:
            try:
                self.original.flush()
            except:
                pass

# 全局文件日志器实例
_file_logger = None

def setup_file_logging():
    """设置文件日志记录"""
    global _file_logger
    
    if _file_logger is None:
        _file_logger = FileLogger()
        
        # 保存原始的stdout和stderr
        original_stdout = sys.stdout
        original_stderr = sys.stderr
        
        # 创建Tee输出，同时输出到原始输出和文件
        sys.stdout = TeeOutput(original_stdout, _file_logger)
        sys.stderr = TeeOutput(original_stderr, _file_logger)
        
        _file_logger.write_log("文件日志系统已设置完成")
    
    return _file_logger

def log_to_file(message):
    """直接写入文件日志的函数"""
    global _file_logger
    if _file_logger:
        _file_logger.write_log(message)
    else:
        # 如果还没有初始化，先初始化
        setup_file_logging()
        _file_logger.write_log(message)

# 注释掉自动初始化，改为手动调用
# if getattr(sys, 'frozen', False):
#     setup_file_logging()