from typing import Literal, Self
from pydantic import model_validator

from datetime import datetime

from .communication import CommunicationModel
from .submodels import ActivityPaymentInfo
from .enums import CommunicationCategory

from fiber_package.refs import SignupRefList

from fiber_package.signup.elements.form_element import FormElement

class ActivityModel(CommunicationModel):
    category: Literal[CommunicationCategory.activity]

    slug: str
    # unique short name used in the public URL

    start_time: datetime
    end_time: datetime

    payment_info: ActivityPaymentInfo | None = None

    form: list[FormElement]

    signups: SignupRefList = SignupRefList([], "signup")

    # TODO: see Felt 'activiteiten' DB schema. Things like:
    # email, target group, maximal attendees ....

    @model_validator(mode='after')
    def check_end_after_start(self) -> Self:
        if self.end_time < self.start_time:
            raise ValueError("End time cannot be earlier than start time")
        return self