"""Targets router (spec §3.4)."""

from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy import select
from sqlalchemy.orm import Session

from database import get_db
from models import Target
from schemas import TargetRead

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


@router.get("", response_model=list[TargetRead])
def list_targets(db: Session = Depends(get_db)):
    return db.scalars(select(Target).order_by(Target.start_date)).all()


@router.get("/current", response_model=TargetRead)
def current_target(db: Session = Depends(get_db)):
    target = db.scalar(select(Target).where(Target.end_date.is_(None)))
    if target is None:
        raise HTTPException(status_code=404, detail="No active target")
    return target