# hf_demo.py – ARF v4 API with Memory & Health Check
from fastapi import FastAPI, HTTPException
from fastapi.middleware.cors import CORSMiddleware
import gradio as gr
import numpy as np
from datetime import datetime

# ARF v4 imports
from agentic_reliability_framework.core.governance.risk_engine import RiskEngine
from agentic_reliability_framework.runtime.memory import create_faiss_index, RAGGraphMemory
from agentic_reliability_framework.runtime.memory.constants import MemoryConstants

app = FastAPI(title="ARF v4 API with Memory")

# Enable CORS for your frontend
app.add_middleware(
    CORSMiddleware,
    allow_origins=["https://arf-frontend-sandy.vercel.app"],
    allow_methods=["*"],
)

# ---------------------------------------------------------------------------
# Initialize ARF components
# ---------------------------------------------------------------------------
risk_engine = RiskEngine()

# Create FAISS index and memory (using default dimension from constants)
faiss_index = create_faiss_index(dim=MemoryConstants.VECTOR_DIM)
memory = RAGGraphMemory(faiss_index)

# ---------------------------------------------------------------------------
# API Endpoints
# ---------------------------------------------------------------------------
@app.get("/")
async def root():
    return {
        "service": "ARF OSS API",
        "version": "4.0.0",
        "status": "operational",
        "memory_stats": memory.get_graph_stats() if memory.has_historical_data() else "empty"
    }

@app.get("/health")
async def health():
    return {"status": "ok", "version": "4.0.0"}

@app.get("/api/v1/get_risk")
async def get_risk():
    risk_score = risk_engine.get_current_risk()
    return {
        "system_risk": risk_score.mean,
        "status": "critical" if risk_score.mean > 0.8 else "normal"
    }

@app.post("/api/v1/incident")
async def store_incident(event_data: dict, analysis: dict):
    try:
        incident_id = memory.store_incident(event_data, analysis)
        return {"incident_id": incident_id}
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))

@app.get("/api/v1/memory/similar")
async def find_similar_incidents(action: str, k