from typing import Optional

from fastapi import APIRouter, Depends, Query
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.auth import get_current_admin_user
from app.database import get_session
from app.models import Event
from app.schemas import EventCreate, EventUpdate, EventResponse
from app.user_models import User

router = APIRouter()


@router.get("", response_model=list[EventResponse])
async def list_events(
    active: Optional[bool] = Query(None, description="Filter by active status"),
    session: AsyncSession = Depends(get_session),
):
    query = select(Event).order_by(Event.date)
    if active is not None:
        query = query.where(Event.active == active)
    result = await session.execute(query)
    return list(result.scalars().all())


@router.get("/{event_id}", response_model=EventResponse)
async def get_event(event_id: int, session: AsyncSession = Depends(get_session)):
    result = await session.execute(select(Event).where(Event.id == event_id))
    event = result.scalar_one_or_none()
    if not event:
        return {"error": "Event not found"}
    return event


@router.post("", response_model=EventResponse, status_code=201)
async def create_event(
    payload: EventCreate,
    session: AsyncSession = Depends(get_session),
    _: User = Depends(get_current_admin_user),
):
    event = Event(**payload.model_dump(), active=True)
    session.add(event)
    await session.commit()
    await session.refresh(event)
    return event


@router.put("/{event_id}", response_model=EventResponse)
async def update_event(
    event_id: int,
    payload: EventUpdate,
    session: AsyncSession = Depends(get_session),
    _: User = Depends(get_current_admin_user),
):
    result = await session.execute(select(Event).where(Event.id == event_id))
    event = result.scalar_one_or_none()
    if not event:
        return {"error": "Event not found"}
    for key, value in payload.model_dump(exclude_unset=True).items():
        setattr(event, key, value)
    await session.commit()
    await session.refresh(event)
    return event


@router.delete("/{event_id}", status_code=204)
async def delete_event(
    event_id: int,
    session: AsyncSession = Depends(get_session),
    _: User = Depends(get_current_admin_user),
):
    result = await session.execute(select(Event).where(Event.id == event_id))
    event = result.scalar_one_or_none()
    if not event:
        return {"error": "Event not found"}
    await session.delete(event)
    await session.commit()