from datetime import datetime

NODE_CLASS_MAPPINGS = {}
NODE_DISPLAY_NAME_MAPPINGS = {}


def register_node(identifier: str, display_name: str):
    def decorator(cls):
        NODE_CLASS_MAPPINGS[identifier] = cls
        NODE_DISPLAY_NAME_MAPPINGS[identifier] = display_name

        return cls

    return decorator


@register_node("JWDatetimeString", "Datetime String")
class _:
    CATEGORY = "jamesWalker55"
    INPUT_TYPES = lambda: {
        "required": {
            "format": ("STRING", {"default": "%Y-%m-%dT%H:%M:%S"}),
        }
    }
    RETURN_TYPES = ("STRING",)
    FUNCTION = "execute"

    def execute(self, format: str):
        now = datetime.now()
        return (now.strftime(format),)

    @classmethod
    def IS_CHANGED(cls, *args):
        # This value will be compared with previous 'IS_CHANGED' outputs
        # If inequal, then this node will be considered as modified
        # NaN is never equal to itself
        return float("NaN")