# flask_app/logger_setup.py

import logging
import sys
import uuid
from datetime import datetime, timedelta
from logging.handlers import RotatingFileHandler

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_main(log_name, log_dir='/flask_project/flask_app/static/output', max_bytes=10*1024*1024, backup_count=5):
    """
    根据名称创建全局日志记录器，并将日志写入指定的 .txt 文件中。
    """
    os.makedirs(log_dir, exist_ok=True)  # 确保日志目录存在

    logger = logging.getLogger(log_name)
    if not logger.hasHandlers():  # 防止重复添加处理器
        logger.setLevel(logging.INFO)

        # 将文件名设置为 model_log.txt（如果 log_name 为 "model_log"）
        log_file_path = os.path.join(log_dir, f'{log_name}.txt')
        file_handler = RotatingFileHandler(
            log_file_path,
            maxBytes=max_bytes,
            backupCount=backup_count,
            encoding='utf-8'
        )
        file_handler.setFormatter(logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s'))
        logger.addHandler(file_handler)

    return logger
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 只会处理大于或等于 INFO 级别的日志消息（例如 INFO、WARNING、ERROR、CRITICAL），而 DEBUG 级别的消息会被忽略。
        logger.propagate = False
    g.logger = logger
    g.output_folder = output_folder    #输出文件夹路径