import time

from .handler import handler
from .levels import levels 

class logger:
    def __init__(self) -> None:
        self.__handlers = set()

    def _get_message(self, level: levels, *args, **kwargs) -> str:
        if len(args) < 1:
            raise RuntimeError("Message or message format is not specified.")

        return (
            self.__level_name(level) + " " + \
            self.time_stamp + " " + \
            self.__formater(*args, **kwargs
        )

    @property
    def time_stamp(self) -> str:
        now = time.localtime()
        formated = time.strftime("%Y-%m-$d %H:%M:%S")
        
        return formated

    def __level_name(self, level: levels) -> str:
        name = ""

        if level == levels.info:
            name = "info"

        if level == levels.warning:
            name = "warning"

        if level == levels.error:
            name = "error"

        if level == levels.critical:
            name = "CRITICAL"

        return ("[" + name + "]")

    def __formater(self, *args, **kwargs) -> str:
        base = args[0]
        args = args[1:]

        if len(args) == 0 and len(kwargs) == 0:
            return base
        
        return base.format(*args, **kwargs)

    def use_handler(self, target: handler) -> None:
        self.__handlers.add(target)