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import { MessageList } from './MessageList';
import { MessageInput } from './MessageInput';
import type { ChatSession } from './types';
import './BottomChat.css';
interface BottomChatProps {
onSessionUpdate?: (session: ChatSession) => void;
}
export const BottomChat: React.FC<BottomChatProps> = ({ onSessionUpdate }) => {
const [messages, setMessages] = useState<ChatSession['messages']>([]);
const [isLoading, setIsLoading] = useState(false);
const [sessionId, setSessionId] = useState<string>('');
const [isExpanded, setIsExpanded] = useState(false);
const chatContainerRef = useRef<HTMLDivElement>(null);
// Generate session ID on mount
useEffect(() => {
const newSessionId = `session-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
setSessionId(newSessionId);
}, []);
// Auto scroll to bottom when new messages arrive
useEffect(() => {
if (chatContainerRef.current) {
chatContainerRef.current.scrollTop = chatContainerRef.current.scrollHeight;
}
}, [messages]);
const handleSendMessage = async (content: string) => {
if (!content.trim() || isLoading) return;
const userMessage = {
id: `msg-${Date.now()}`,
content,
timestamp: new Date(),
sender: 'user' as const,
type: 'text' as const
};
setMessages(prev => [...prev, userMessage]);
setIsLoading(true);
try {
const response = await fetch('/api/ai/chat/', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'X-CSRFToken': getCsrfToken(),
},
body: JSON.stringify({
query: content,
session_id: sessionId
})
});
if (!response.ok) {
throw new Error(`HTTP error! status: ${response.status}`);
}
const data = await response.json();
if (data.error) {
throw new Error(data.error);
}
const aiMessage = {
id: `msg-${Date.now()}-ai`,
content: data.response,
timestamp: new Date(),
sender: 'ai' as const,
type: 'text' as const,
metadata: {
queryType: data.metadata?.query_type,
confidence: data.metadata?.confidence,
sources: data.sources || [],
processingTime: data.metadata?.processing_time
}
};
setMessages(prev => [...prev, aiMessage]);
// Update session if callback provided
if (onSessionUpdate) {
onSessionUpdate({
id: sessionId,
messages: [...messages, userMessage, aiMessage],
createdAt: new Date(),
updatedAt: new Date()
});
}
} catch (err) {
console.error('Chat error:', err);
// Add error message to chat
const errorMessage = {
id: `msg-${Date.now()}-error`,
content: '抱歉，处理您的问题时出现了问题。请稍后再试。',
timestamp: new Date(),
sender: 'ai' as const,
type: 'error' as const
};
setMessages(prev => [...prev, errorMessage]);
} finally {
setIsLoading(false);
}
};
const getCsrfToken = (): string => {
const token = document.querySelector('[name=csrfmiddlewaretoken]')?.getAttribute('value');
return token || '';
};
const toggleChat = () => {
setIsExpanded(!isExpanded);
};
const quickPrompts = [
"爷爷的故事",
"家族传统",
"健康记录"
];
const handleQuickPrompt = (prompt: string) => {
handleSendMessage(prompt);
};
return (
<div className="bottom-chat">
{/* Collapsed state - floating button */}
{!isExpanded && (
<button
className="chat-floating-btn"
onClick={toggleChat}
title="打开家庭知识助手"
>
💬
</button>
)}
{/* Expanded state - chat interface */}
{isExpanded && (
<div className="chat-container">
<div className="chat-header">
<h3>💬 家庭知识助手</h3>
<button
className="chat-close-btn"
onClick={toggleChat}
title="关闭"
>
✕
</button>
</div>
<div className="chat-body">
{/* Welcome message */}
{messages.length === 0 && (
<div className="chat-welcome">
<div className="welcome-icon">🤖</div>
<p className="welcome-text">
询问家庭知识，比如：爷爷的创业故事、妈妈的生日安排...
</p>
{/* Quick prompts */}
<div className="quick-prompts">
{quickPrompts.map((prompt, index) => (
<button
key={index}
className="quick-prompt-btn"
onClick={() => handleQuickPrompt(prompt)}
>
{prompt}
</button>
))}
</div>
</div>
)}
{/* Messages area */}
<div className="chat-messages" ref={chatContainerRef}>
{messages.length > 0 && (
<MessageList messages={messages} isLoading={isLoading} />
)}
</div>
</div>
{/* Input area */}
<div className="chat-input-area">
<MessageInput
onSendMessage={handleSendMessage}
disabled={isLoading}
placeholder="输入您的问题..."
/>
</div>
</div>
)}
</div>
);
}; |