from typing import Optional
import tdw_catalog.metadata.currency as currency_field
import tdw_catalog.metadata.field as field
from tdw_catalog.utils import CurrencyFieldValue


class Field(field.RecommendedMetadataField[CurrencyFieldValue],
            currency_field.Field):
    """
    Track and report on the data license cost

    Attributes
    ----------
    None
    """

    def __init__(self, key: str, currency: Optional[str],
                 amount: Optional[float]) -> None:
        currency_field.Field.__init__(self, key, currency, amount)

    def serialize(self) -> dict:
        res = super().serialize()
        res["recommended_type"] = "cost"
        return res