import uuid
from typing import Annotated

from fastapi import APIRouter, Depends
from pydantic import BaseModel, ConfigDict
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.auth.deps import get_current_user
from app.db import get_db
from app.models import Department, User

router = APIRouter(prefix="/departments", tags=["departments"])


class DepartmentOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)

    id: uuid.UUID
    name: str


@router.get("")
async def list_departments(
    user: Annotated[User, Depends(get_current_user)],
    db: Annotated[AsyncSession, Depends(get_db)],
) -> list[DepartmentOut]:
    """Department names for filters and pickers — not secret, any user."""
    rows = (
        (await db.execute(select(Department).order_by(Department.name))).scalars().all()
    )
    return [DepartmentOut.model_validate(row) for row in rows]