# flask_app/logger_setup.py

import logging
import uuid
from datetime import datetime, timedelta
from flask import g
import os

class CSTFormatter(logging.Formatter):
    """自定义的 Formatter，将日志的时间戳调整为中国标准时间（UTC+8）"""

    def formatTime(self, record, datefmt=None):
        ct = datetime.fromtimestamp(record.created) + timedelta(hours=8)
        if datefmt:
            s = ct.strftime(datefmt)
        else:
            try:
                s = ct.strftime("%Y-%m-%d %H:%M:%S")
                if self.usesTime():
                    s = f"{s},{record.msecs:03d}"
            except ValueError:
                s = ct.strftime("%Y-%m-%d %H:%M:%S")
        return s

def create_logger(app, subfolder):
    """
    创建一个唯一的 logger 和对应的输出文件夹。

    参数:
        subfolder (str): 子文件夹名称，如 'output1', 'output2', 'output3'
    """
    unique_id = str(uuid.uuid4())
    g.unique_id = unique_id
    output_folder = os.path.join("flask_app", "static", "output", subfolder, unique_id)
    os.makedirs(output_folder, exist_ok=True)
    log_filename = "log.txt"
    log_path = os.path.join(output_folder, log_filename)
    logger = logging.getLogger(unique_id)
    if not logger.handlers:
        file_handler = logging.FileHandler(log_path)
        file_formatter = CSTFormatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
        file_handler.setFormatter(file_formatter)
        logger.addHandler(file_handler)
        stream_handler = logging.StreamHandler()
        stream_handler.setFormatter(logging.Formatter('%(message)s'))
        logger.addHandler(stream_handler)
        logger.setLevel(logging.INFO)
        logger.propagate = False
    g.logger = logger
    g.output_folder = output_folder