import uuid

from sqlalchemy.ext.asyncio import AsyncSession

from app.crud import crud_championship, crud_participant, crud_registration, crud_user
from app.models.participant_list import ParticipantList
from app.models.user import User
from app.services import notification_service


async def publish_participant_list(
    db: AsyncSession,
    championship_id: uuid.UUID,
    organizer: User,
) -> ParticipantList:
    pl = await crud_participant.get_by_championship(db, championship_id)
    if not pl:
        raise ValueError("Participant list not found — create it first")

    pl = await crud_participant.publish(db, pl)

    championship = await crud_championship.get(db, championship_id)
    registrations = await crud_registration.list_by_championship(db, championship_id)

    for reg in registrations:
        user = await crud_user.get(db, reg.user_id)
        if not user:
            continue

        if reg.status == "accepted":
            title = "Congratulations!"
            body = f"You've been accepted to {championship.title}!"
        elif reg.status == "rejected":
            title = "Application Update"
            body = f"Unfortunately, your application to {championship.title} was not accepted this time."
        else:
            title = "Application Update"
            body = f"You are on the waitlist for {championship.title}."

        await notification_service.send_push_notification(
            db=db,
            user=user,
            title=title,
            body=body,
            notif_type=reg.status,
            registration_id=str(reg.id),
        )

    return pl