from fastapi import APIRouter, Request

router = APIRouter()


@router.get("/stats")
async def memory_stats(request: Request):
    """
    Return current memory graph statistics using the risk engine's memory instance.
    """
    risk_engine = request.app.state.risk_engine

    # Check if memory exists and has the required method
    if hasattr(risk_engine, 'memory') and hasattr(risk_engine.memory, 'get_graph_stats'):
        stats = risk_engine.memory.get_graph_stats()
        return stats
    else:
        # Graceful fallback (e.g., during testing or if memory not initialized)
        return {
            "incident_nodes": 0,
            "outcome_nodes": 0,
            "edges": 0,
            "message": "Memory not fully initialized"
        }