"""Class insights router.

GET /ai/v2/class-insights/{class_id} — returns class-level weak LOs,
at-risk counts, and recommended interventions.
"""

from fastapi import APIRouter, Depends, Query

from app.api.v2.dependencies import get_class_insights_service
from app.schemas.class_insights import ClassInsightsResponse

router = APIRouter(prefix="/ai/v2", tags=["inference"])


@router.get(
    "/class-insights/{class_id}",
    response_model=ClassInsightsResponse,
    summary="Get Class Insights",
    description="Return class-level insights including weakest LOs, at-risk students, and interventions.",
)
async def get_class_insights(
    class_id: str,
    subject: str | None = Query(None, description="Optional subject filter"),
    service=Depends(get_class_insights_service),
) -> ClassInsightsResponse:
    """Retrieve class-level insights for a teacher."""
    return service.get_insights(class_id=class_id, subject=subject)