import json
import jsonschema


class PropertyValueError(ValueError):
    pass


class Property:
    """
    Presumes that the handler will take the same arguments as aiomqtt.Client.publish

    ie:  async publish(
        topic: str,
        payload: str | bytes | bytearray | int | float | None = None,
        qos: int = 0,
        retain: bool = False,
        properties: Properties | None = None,
        *args: Any,
        timeout: float | None = None,
        **kwargs: Any
    ) → None
    """

    def __init__(
        self,
        name: str,
        description: str | None = None,
        schema: dict | None = None,
        handler=None,
        **kwargs,
    ):
        self.name = name
        self.description = description
        self.schema = schema
        self.handler = handler
        self.additional_properties = kwargs

    def __call__(self, handler_instance, payload, **kwargs):
        if self.handler is None:
            raise NotImplementedError(f"No handler bound for property '{self.name}'")

        try:
            value = json.loads(payload)
            if self.schema is not None:
                jsonschema.validate(value, self.schema)
        except json.decoder.JSONDecodeError as e:
            raise PropertyValueError(
                f"Invalid JSON at line {e.lineno} column {e.colno}: {e.msg}"
            )
        except jsonschema.ValidationError as e:
            raise PropertyValueError(f"Schema error in {e.json_path}: {e.message}")

        try:
            return self.handler(self.name, payload, **kwargs)
        except Exception as e:
            print("Failed to set property: ", e)
            raise RuntimeError(f"Failed to set property.")