from typing import List, Optional
from sqlalchemy.orm import Session

from app.crud.base import CRUDBase
from app.models.event_theme import EventTheme
from app.schemas.event_theme import EventThemeCreate, EventThemeUpdate


class CRUDEventTheme(CRUDBase[EventTheme, EventThemeCreate, EventThemeUpdate]):
    def get_by_name(self, db: Session, *, name: str) -> Optional[EventTheme]:
        return db.query(EventTheme).filter(EventTheme.name == name).first()

    def get_active_themes(
            self, db: Session, *, skip: int = 0, limit: int = 100
    ) -> List[EventTheme]:
        return (
            db.query(self.model)
            .filter(self.model.events.any())
            .offset(skip)
            .limit(limit)
            .all()
        )


event_theme = CRUDEventTheme(EventTheme)