"""Health check endpoint."""
from fastapi import APIRouter, Depends
from fastapi.responses import JSONResponse
from sqlmodel import Session, text

from app.core.db import get_session

router = APIRouter()


@router.get("/health")
def health(session: Session = Depends(get_session)):
    """Health check for load balancers. Does not write to DB so it can recover after DB outages."""
    try:
        session.exec(text("SELECT 1"))
    except Exception:
        session.rollback()
        return JSONResponse(
            content={"status": "unhealthy", "error": "database unavailable"},
            status_code=503,
        )
    return {"status": "healthy"}