"""
结构化日志模块
提供统一的日志接口，支持 JSON 格式输出和上下文信息
"""
import json
import sys
import logging


class StructuredLogger:
    """结构化日志包装器"""
    _logger = None

    @classmethod
    def get_logger(cls, name='app'):
        if cls._logger is None:
            cls._logger = logging.getLogger(name)
        return cls._logger

    @classmethod
    def configure(cls, config):
        """根据配置初始化日志系统"""
        logger = logging.getLogger()
        logger.setLevel(config.LOG_LEVEL)
        handler = logging.StreamHandler(sys.stdout)
        handler.setFormatter(logging.Formatter(config.LOG_FORMAT))
        logger.handlers.clear()
        logger.addHandler(handler)
        cls._logger = logging.getLogger('app')

    @classmethod
    def info(cls, msg, **kwargs):
        cls.get_logger().info(f"{msg} {json.dumps(kwargs, ensure_ascii=False, default=str)}" if kwargs else msg)

    @classmethod
    def warning(cls, msg, **kwargs):
        cls.get_logger().warning(f"{msg} {json.dumps(kwargs, ensure_ascii=False, default=str)}" if kwargs else msg)

    @classmethod
    def error(cls, msg, **kwargs):
        cls.get_logger().error(f"{msg} {json.dumps(kwargs, ensure_ascii=False, default=str)}" if kwargs else msg)

    @classmethod
    def debug(cls, msg, **kwargs):
        cls.get_logger().debug(f"{msg} {json.dumps(kwargs, ensure_ascii=False, default=str)}" if kwargs else msg)


log = StructuredLogger