""" Crypto Anomaly Detection Engine System (CADES)

WebSocket Module
This module implements real-time WebSocket functionality for the CADES system,
handling live anomaly detection updates and Solana blockchain monitoring.

Author: CADES Team
License: Proprietary
"""

import asyncio
import json
import logging
from dataclasses import dataclass
from typing import Dict, Set, Optional
from fastapi import WebSocket, WebSocketDisconnect
from fastapi.websockets import WebSocketState
from solana.rpc.websocket_api import connect
from src.chain_analysis.blockchain_listener import BlockchainEvent
from src.score_aggregator.risk_scorer import RiskScore

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

@dataclass
class AnomalyEvent:
    """Real-time anomaly event data structure"""
    token_address: str
    risk_score: float
    anomaly_type: str
    timestamp: int
    details: Dict

class WebSocketManager:
    """Manages WebSocket connections and real-time updates"""
    
    def __init__(self, solana_ws_url: str):
        self.active_connections: Set[WebSocket] = set()
        self.solana_ws_url = solana_ws_url
        self.subscription_ids: Dict[str, int] = {}
        self._running = False
        
    async def connect(self, websocket: WebSocket):
        """Handle new WebSocket connection"""
        await websocket.accept()
        self.active_connections.add(websocket)
        logger.info(f"New connection established. Active connections: {len(self.active_connections)}")
        
    async def disconnect(self, websocket: WebSocket):
        """Handle WebSocket disconnection"""
        self.active_connections.remove(websocket)
        if websocket.client_state != WebSocketState.DISCONNECTED:
            await websocket.close()
        logger.info(f"Connection closed. Remaining connections: {len(self.active_connections)}")
        
    async def broadcast_anomaly(self, event: AnomalyEvent):
        """Broadcast anomaly event to all connected clients"""
        disconnected = set()
        message = json.dumps({
            "type": "anomaly_alert",
            "data": {
                "token_address": event.token_address,
                "risk_score": event.risk_score,
                "anomaly_type": event.anomaly_type,
                "timestamp": event.timestamp,
                "details": event.details
            }
        })
        
        for connection in self.active_connections:
            try:
                await connection.send_text(message)
            except WebSocketDisconnect:
                disconnected.add(connection)
            except Exception as e:
                logger.error(f"Error broadcasting message: {e}")
                disconnected.add(connection)
                
        for connection in disconnected:
            await self.disconnect(connection)
            
    async def start_solana_listener(self):
        """Initialize Solana WebSocket connection and event processing"""
        self._running = True
        async with connect(self.solana_ws_url) as ws_client:
            try:
                subscription = await ws_client.program_subscribe(
                    "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA"
                )
                self.subscription_ids["token_program"] = subscription.value
                
                while self._running:
                    msg = await ws_client.recv()
                    await self._process_solana_event(msg)
            except Exception as e:
                logger.error(f"Solana WebSocket error: {e}")
                self._running = False
                
    async def _process_solana_event(self, event: Dict):
        """Process incoming Solana events and detect anomalies"""
        try:
            if "params" not in event:
                return
                
            data = event["params"]["result"]
            blockchain_event = BlockchainEvent.from_solana_event(data)
            risk_score = await self._calculate_risk_score(blockchain_event)
            
            if risk_score.score >= 0.8:  # High-risk threshold
                anomaly = AnomalyEvent(
                    token_address=blockchain_event.token_address,
                    risk_score=risk_score.score,
                    anomaly_type=risk_score.primary_factor,
                    timestamp=blockchain_event.timestamp,
                    details=risk_score.factor_breakdown
                )
                await self.broadcast_anomaly(anomaly)
                
        except Exception as e:
            logger.error(f"Error processing Solana event: {e}")
            
    async def _calculate_risk_score(self, event: BlockchainEvent) -> RiskScore:
        """Calculate risk score for blockchain event"""
        # Risk scoring logic implementation
        pass
        
    async def stop(self):
        """Stop the WebSocket manager"""
        self._running = False
        for connection in self.active_connections.copy():
            await self.disconnect(connection)

# FastAPI WebSocket endpoint handler
async def websocket_endpoint(websocket: WebSocket, manager: WebSocketManager):
    """Handle WebSocket endpoint connections"""
    try:
        await manager.connect(websocket)
        while True:
            try:
                data = await websocket.receive_text()
                # Handle client messages if needed
            except WebSocketDisconnect:
                await manager.disconnect(websocket)
                break
    except Exception as e:
        logger.error(f"WebSocket endpoint error: {e}")
        await manager.disconnect(websocket)

if __name__ == "__main__":
    # Example usage
    async def main():
        manager = WebSocketManager("wss://api.mainnet-beta.solana.com")
        await manager.start_solana_listener()
        
    asyncio.run(main())