import subprocess
import sys
import os
from pathlib import Path
from logger_config import setup_logger

# 设置日志记录器
logger = setup_logger('service_runner')

def run_in_background():
    """在后台运行定时任务"""
    logger.info("=" * 50)
    logger.info("开始启动后台定时任务")
    logger.info("=" * 50)
    
    script_path = Path(__file__).parent / "scheduler.py"
    pid_file = Path(__file__).parent / "scheduler_pid.txt"
    
    logger.info(f"脚本路径: {script_path}")
    logger.info(f"PID文件路径: {pid_file}")
    logger.info(f"当前工作目录: {os.getcwd()}")
    
    # 检查脚本文件是否存在
    if not script_path.exists():
        logger.error(f"脚本文件不存在: {script_path}")
        return False
    
    # 检查是否已经有PID文件
    if pid_file.exists():
        logger.warning(f"发现已存在的PID文件: {pid_file}")
        try:
            with open(pid_file, 'r') as f:
                old_pid = f.read().strip()
            logger.warning(f"已存在的进程ID: {old_pid}")
            
            # 检查进程是否还在运行
            try:
                import psutil
                if psutil.pid_exists(int(old_pid)):
                    logger.warning(f"进程 {old_pid} 仍在运行，请先停止它")
                    return False
                else:
                    logger.info(f"进程 {old_pid} 已不存在，删除旧的PID文件")
                    pid_file.unlink()
            except ImportError:
                logger.warning("无法检查进程状态，建议手动确认")
                return False
        except Exception as e:
            logger.error(f"读取PID文件失败: {str(e)}")
            pid_file.unlink()  # 删除损坏的PID文件
    
    # 使用pythonw.exe在后台运行（无窗口）
    pythonw_path = sys.executable.replace('python.exe', 'pythonw.exe')
    logger.info(f"Python解释器路径: {sys.executable}")
    logger.info(f"Pythonw路径: {pythonw_path}")
    
    if not os.path.exists(pythonw_path):
        logger.warning(f"pythonw.exe不存在，使用python.exe替代")
        pythonw_path = sys.executable
    
    try:
        logger.info("正在启动后台进程...")
        process = subprocess.Popen([pythonw_path, str(script_path)], 
                        cwd=str(Path(__file__).parent),
                        creationflags=subprocess.CREATE_NO_WINDOW)
        
        logger.info(f"后台进程启动成功，进程ID: {process.pid}")
        
        # 保存进程ID到文件
        with open(pid_file, 'w') as f:
            f.write(str(process.pid))
        
        logger.info(f"进程ID已保存到: {pid_file}")
        logger.info("=" * 50)
        logger.info("后台定时任务启动完成")
        logger.info("=" * 50)
        
        return True
        
    except Exception as e:
        logger.error(f"启动后台进程失败: {str(e)}")
        logger.error(f"错误类型: {type(e).__name__}")
        import traceback
        logger.error(f"异常堆栈: {traceback.format_exc()}")
        return False

if __name__ == "__main__":
    try:
        success = run_in_background()
        if success:
            logger.info("程序执行完成")
        else:
            logger.error("程序执行失败")
            exit(1)
    except Exception as e:
        logger.error(f"程序执行过程中出现未捕获的异常: {str(e)}")
        logger.error(f"异常类型: {type(e).__name__}")
        import traceback
        logger.error(f"异常堆栈: {traceback.format_exc()}")
        exit(1)