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import { useState, useRef, useCallback, useEffect } from 'react';
import { useInput } from 'ink';
import { GeminiClient } from '../../core/gemini-client.js';
import { type Chat, type PartListUnion } from '@google/genai';
import { HistoryItem } from '../types.js';
import { processGeminiStream } from '../../core/gemini-stream.js';
import { StreamingState } from '../../core/gemini-stream.js';
const addHistoryItem = (
setHistory: React.Dispatch<React.SetStateAction<HistoryItem[]>>,
itemData: Omit<HistoryItem, 'id'>,
id: number,
) => {
setHistory((prevHistory) => [
...prevHistory,
{ ...itemData, id } as HistoryItem,
]);
};
export const useGeminiStream = (
setHistory: React.Dispatch<React.SetStateAction<HistoryItem[]>>,
) => {
const [streamingState, setStreamingState] = useState<StreamingState>(
StreamingState.Idle,
);
const [initError, setInitError] = useState<string | null>(null);
const abortControllerRef = useRef<AbortController | null>(null);
const currentToolGroupIdRef = useRef<number | null>(null);
const chatSessionRef = useRef<Chat | null>(null);
const geminiClientRef = useRef<GeminiClient | null>(null);
const messageIdCounterRef = useRef(0);
// Initialize Client Effect (remains the same)
useEffect(() => {
setInitError(null);
if (!geminiClientRef.current) {
try {
geminiClientRef.current = new GeminiClient();
} catch (error: any) {
setInitError(
`Failed to initialize client: ${error.message || 'Unknown error'}`,
);
}
}
}, []);
// Input Handling Effect (remains the same)
useInput((input, key) => {
if (streamingState === StreamingState.Responding && key.escape) {
abortControllerRef.current?.abort();
}
});
// ID Generation Callback (remains the same)
const getNextMessageId = useCallback((baseTimestamp: number): number => {
messageIdCounterRef.current += 1;
return baseTimestamp + messageIdCounterRef.current;
}, []);
// Submit Query Callback (updated to call processGeminiStream)
const submitQuery = useCallback(
async (query: PartListUnion) => {
if (streamingState === StreamingState.Responding) {
// No-op if already going.
return;
}
if (typeof query === 'string' && query.toString().trim().length === 0) {
return;
}
const userMessageTimestamp = Date.now();
const client = geminiClientRef.current;
if (!client) {
setInitError('Gemini client is not available.');
return;
}
if (!chatSessionRef.current) {
chatSessionRef.current = await client.startChat();
}
// Reset state
setStreamingState(StreamingState.Responding);
setInitError(null);
currentToolGroupIdRef.current = null;
messageIdCounterRef.current = 0;
const chat = chatSessionRef.current;
try {
// Add user message
if (typeof query === 'string') {
const trimmedQuery = query.toString();
addHistoryItem(
setHistory,
{ type: 'user', text: trimmedQuery },
userMessageTimestamp,
);
} else if (
// HACK to detect errored function responses.
typeof query === 'object' &&
query !== null &&
!Array.isArray(query) && // Ensure it's a single Part object
'functionResponse' in query && // Check if it's a function response Part
query.functionResponse?.response && // Check if response object exists
'error' in query.functionResponse.response // Check specifically for the 'error' key
) {
const history = chat.getHistory();
history.push({ role: 'user', parts: [query] });
return;
}
// Prepare for streaming
abortControllerRef.current = new AbortController();
const signal = abortControllerRef.current.signal;
// --- Delegate to Stream Processor ---
const stream = client.sendMessageStream(chat, query, signal);
const addHistoryItemFromStream = (
itemData: Omit<HistoryItem, 'id'>,
id: number,
) => {
addHistoryItem(setHistory, itemData, id);
};
const getStreamMessageId = () => getNextMessageId(userMessageTimestamp);
// Call the renamed processor function
await processGeminiStream({
stream,
signal,
setHistory,
submitQuery,
getNextMessageId: getStreamMessageId,
addHistoryItem: addHistoryItemFromStream,
currentToolGroupIdRef,
});
} catch (error: any) {
// (Error handling for stream initiation remains the same)
console.error('Error initiating stream:', error);
if (error.name !== 'AbortError') {
// Use historyUpdater's function potentially? Or keep addHistoryItem here?
// Keeping addHistoryItem here for direct errors from this scope.
addHistoryItem(
setHistory,
{
type: 'error',
text: `[Error starting stream: ${error.message}]`,
},
getNextMessageId(userMessageTimestamp),
);
}
} finally {
abortControllerRef.current = null;
setStreamingState(StreamingState.Idle);
}
},
[setStreamingState, setHistory, initError, getNextMessageId],
);
return { streamingState, submitQuery, initError };
};
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