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Sleeping
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import { useState, useEffect, useCallback, useRef } from 'react';
const WS_BASE_URL = (import.meta.env.VITE_API_URL || 'http://localhost:8000').replace('http', 'ws');
export interface WSMessage {
type: 'connected' | 'processing' | 'thinking' | 'response' | 'error' | 'pong';
message?: string;
session_id?: string;
step?: string;
question?: string;
response?: string;
status?: string;
confidence?: number;
memory_augmented?: boolean;
error?: string;
}
export interface UseWebSocketReturn {
isConnected: boolean;
isProcessing: boolean;
thinkingSteps: string[];
lastResponse: WSMessage | null;
error: string | null;
connect: (sessionId: string) => void;
disconnect: () => void;
sendQuestion: (question: string, domainId?: string) => void;
}
export const useWebSocket = (): UseWebSocketReturn => {
const [isConnected, setIsConnected] = useState(false);
const [isProcessing, setIsProcessing] = useState(false);
const [thinkingSteps, setThinkingSteps] = useState<string[]>([]);
const [lastResponse, setLastResponse] = useState<WSMessage | null>(null);
const [error, setError] = useState<string | null>(null);
const wsRef = useRef<WebSocket | null>(null);
const sessionIdRef = useRef<string>('');
const connect = useCallback((sessionId: string) => {
if (wsRef.current?.readyState === WebSocket.OPEN) {
return;
}
sessionIdRef.current = sessionId;
setError(null);
const token = localStorage.getItem('auth_token');
const wsUrl = `${WS_BASE_URL}/api/questions/ws/${sessionId}${token ? `?token=${token}` : ''}`;
const ws = new WebSocket(wsUrl);
ws.onopen = () => {
setIsConnected(true);
setError(null);
console.log('WebSocket connected');
};
ws.onmessage = (event) => {
try {
const data: WSMessage = JSON.parse(event.data);
switch (data.type) {
case 'connected':
console.log('WS: Connected to session', data.session_id);
break;
case 'processing':
setIsProcessing(true);
setThinkingSteps([]);
break;
case 'thinking':
if (data.step) {
setThinkingSteps((prev) => [...prev, data.step!]);
}
break;
case 'response':
setIsProcessing(false);
setLastResponse(data);
break;
case 'error':
setIsProcessing(false);
setError(data.error || 'Unknown error');
break;
case 'pong':
// Keepalive response
break;
}
} catch (e) {
console.error('Failed to parse WebSocket message:', e);
}
};
ws.onerror = (event) => {
console.error('WebSocket error:', event);
setError('WebSocket connection error');
setIsConnected(false);
};
ws.onclose = () => {
setIsConnected(false);
setIsProcessing(false);
console.log('WebSocket disconnected');
};
wsRef.current = ws;
}, []);
const disconnect = useCallback(() => {
if (wsRef.current) {
wsRef.current.send(JSON.stringify({ type: 'close' }));
wsRef.current.close();
wsRef.current = null;
}
setIsConnected(false);
setIsProcessing(false);
}, []);
const sendQuestion = useCallback((question: string, domainId: string = 'medical') => {
if (!wsRef.current || wsRef.current.readyState !== WebSocket.OPEN) {
setError('WebSocket not connected');
return;
}
const userId = localStorage.getItem('auth_user')
? JSON.parse(localStorage.getItem('auth_user')!).id
: 'anonymous';
wsRef.current.send(
JSON.stringify({
type: 'question',
question,
domain_id: domainId,
user_id: userId,
})
);
}, []);
// Cleanup on unmount
useEffect(() => {
return () => {
if (wsRef.current) {
wsRef.current.close();
}
};
}, []);
// Keepalive ping
useEffect(() => {
if (!isConnected) return;
const pingInterval = setInterval(() => {
if (wsRef.current?.readyState === WebSocket.OPEN) {
wsRef.current.send(JSON.stringify({ type: 'ping' }));
}
}, 30000);
return () => clearInterval(pingInterval);
}, [isConnected]);
return {
isConnected,
isProcessing,
thinkingSteps,
lastResponse,
error,
connect,
disconnect,
sendQuestion,
};
};
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