from __future__ import annotations
import datetime
from collections.abc import Callable
from dataclasses import dataclass, field
from kiota_abstractions.serialization import AdditionalDataHolder, Parsable, ParseNode, SerializationWriter
from kiota_abstractions.store import BackedModel, BackingStore, BackingStoreFactorySingleton
from typing import Any, Optional, TYPE_CHECKING, Union

@dataclass
class TermsExpiration(AdditionalDataHolder, BackedModel, Parsable):
    # Stores model information.
    backing_store: BackingStore = field(default_factory=BackingStoreFactorySingleton(backing_store_factory=None).backing_store_factory.create_backing_store, repr=False)

    # Stores additional data not described in the OpenAPI description found when deserializing. Can be used for serialization as well.
    additional_data: dict[str, Any] = field(default_factory=dict)
    # Represents the frequency at which the terms will expire, after its first expiration as set in startDateTime. The value is represented in ISO 8601 format for durations. For example, PT1M represents a time period of one month.
    frequency: Optional[datetime.timedelta] = None
    # The OdataType property
    odata_type: Optional[str] = None
    # The DateTime when the agreement is set to expire for all users. The Timestamp type represents date and time information using ISO 8601 format and is always in UTC time. For example, midnight UTC on Jan 1, 2014 is 2014-01-01T00:00:00Z.
    start_date_time: Optional[datetime.datetime] = None
    
    @staticmethod
    def create_from_discriminator_value(parse_node: ParseNode) -> TermsExpiration:
        """
        Creates a new instance of the appropriate class based on discriminator value
        param parse_node: The parse node to use to read the discriminator value and create the object
        Returns: TermsExpiration
        """
        if parse_node is None:
            raise TypeError("parse_node cannot be null.")
        return TermsExpiration()
    
    def get_field_deserializers(self,) -> dict[str, Callable[[ParseNode], None]]:
        """
        The deserialization information for the current model
        Returns: dict[str, Callable[[ParseNode], None]]
        """
        fields: dict[str, Callable[[Any], None]] = {
            "frequency": lambda n : setattr(self, 'frequency', n.get_timedelta_value()),
            "@odata.type": lambda n : setattr(self, 'odata_type', n.get_str_value()),
            "startDateTime": lambda n : setattr(self, 'start_date_time', n.get_datetime_value()),
        }
        return fields
    
    def serialize(self,writer: SerializationWriter) -> None:
        """
        Serializes information the current object
        param writer: Serialization writer to use to serialize this model
        Returns: None
        """
        if writer is None:
            raise TypeError("writer cannot be null.")
        writer.write_timedelta_value("frequency", self.frequency)
        writer.write_str_value("@odata.type", self.odata_type)
        writer.write_datetime_value("startDateTime", self.start_date_time)
        writer.write_additional_data_value(self.additional_data)
    

