import logging
import colorlog


class Singleton(object):
    def __init__(self, cls):
        self._cls = cls
        self._instance = {}
    def __call__(self):
        if self._cls not in self._instance:
            self._instance[self._cls] = self._cls()
        return self._instance[self._cls]


@Singleton
class Logging(object):
    def __init__(self):
        pass

    def create(self):
        log_colors_config = {
            'DEBUG': 'blue',
            'INFO': 'green',
            'WARNING': 'yellow',
            'ERROR': 'red',
            'CRITICAL': 'bold_red',
        }
        logger = logging.getLogger('logger_name')
        # 输出到控制台
        console_handler = logging.StreamHandler()
        # 输出到文件
        file_handler = logging.FileHandler(filename='build.log', mode='a', encoding='utf8')
        # 日志级别，logger 和 handler以最高级别为准，不同handler之间可以不一样，不相互影响
        logger.setLevel(logging.DEBUG)
        console_handler.setLevel(logging.DEBUG)
        file_handler.setLevel(logging.INFO)
        # 日志输出格式
        file_formatter = logging.Formatter(
            fmt='[%(asctime)s.%(msecs)03d][%(levelname)s] : %(message)s',
            datefmt='%Y-%m-%d  %H:%M:%S'
        )
        console_formatter = colorlog.ColoredFormatter(
            # fmt='%(log_color)s[%(asctime)s.%(msecs)03d] %(filename)s -> %(funcName)s line:%(lineno)d [%(levelname)s] : %(message)s',
            fmt='%(log_color)s[%(asctime)s.%(msecs)03d][%(levelname)s] : %(message)s',
            datefmt='%Y-%m-%d  %H:%M:%S',
            log_colors=log_colors_config
        )
        console_handler.setFormatter(console_formatter)
        file_handler.setFormatter(file_formatter)
        # 重复日志问题：
        # 1、防止多次addHandler；
        # 2、loggername 保证每次添加的时候不一样；
        # 3、显示完log之后调用removeHandler
        if not logger.handlers:
            logger.addHandler(console_handler)
            logger.addHandler(file_handler)

        console_handler.close()
        file_handler.close()
        return logger


class Logger():
    @staticmethod
    def info(content):
        logger = Logging().create()
        logger.info(content)

    @staticmethod
    def debug(content):
        logger = Logging().create()
        logger.debug(content)

    @staticmethod
    def warning(content):
        logger = Logging().create()
        logger.warning(content)

    @staticmethod
    def error(content):
        logger = Logging().create()
        logger.error(content)



if __name__ == '__main__':
    Logger.info("111111")
    Logger.warning("111111")
    Logger.debug("111111")
    Logger.error("111111")