"""Risk prediction API router.

Exposes GET /ai/v2/risk/{student_id} for student risk inference.
"""

from fastapi import APIRouter, Depends

from app.api.v2.dependencies import get_risk_service
from app.schemas.risk import RiskResponse

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


@router.get(
    "/risk/{student_id}",
    response_model=RiskResponse,
    summary="Predict student risk level",
    description=(
        "Returns risk score, 4-class label, reasons, and recommended intervention "
        "for a given student. Uses ML model with rule-based fallback."
    ),
)
async def predict_risk(
    student_id: str,
    service=Depends(get_risk_service),
) -> RiskResponse:
    """Predict risk score and label for a student."""
    return service.predict(student_id=student_id)