from typing import Any, Callable, Dict, List, Optional, Type, TypeVar, Union

import attr

from ..types import UNSET, Unset
from ..util.serialization import is_not_none

T = TypeVar("T", bound="ParameterSpec")


@attr.s(auto_attribs=True)
class ParameterSpec:
    """
    Attributes:
        length (Union[Unset, int]):
    """

    length: Union[Unset, int] = UNSET
    additional_properties: Dict[str, Any] = attr.ib(init=False, factory=dict)

    def to_dict(self, pick_by_predicate: Optional[Callable[[Any], bool]] = is_not_none) -> Dict[str, Any]:
        length = self.length

        field_dict: Dict[str, Any] = {}
        field_dict.update(self.additional_properties)
        field_dict.update({})
        if length is not UNSET:
            field_dict["length"] = length

        field_dict = {k: v for k, v in field_dict.items() if v != UNSET}
        if pick_by_predicate is not None:
            field_dict = {k: v for k, v in field_dict.items() if pick_by_predicate(v)}

        return field_dict

    @classmethod
    def from_dict(cls: Type[T], src_dict: Dict[str, Any]) -> T:
        d = src_dict.copy()
        length = d.pop("length", UNSET)

        parameter_spec = cls(
            length=length,
        )

        parameter_spec.additional_properties = d
        return parameter_spec

    @property
    def additional_keys(self) -> List[str]:
        return list(self.additional_properties.keys())

    def __getitem__(self, key: str) -> Any:
        return self.additional_properties[key]

    def __setitem__(self, key: str, value: Any) -> None:
        self.additional_properties[key] = value

    def __delitem__(self, key: str) -> None:
        del self.additional_properties[key]

    def __contains__(self, key: str) -> bool:
        return key in self.additional_properties
