add chat-api to chat function

.gitignore

@@ -160,3 +160,7 @@ dist
 .yarn/install-state.gz
 .pnp.*
 1097d3adbfbe8745c7109358ddb3635d08fb7c47
+
+# Documentation files (temporary setup guides)
+API_SETUP.md
+QUOTA_SOLUTION.md

eslint.config.js

@@ -42,6 +42,10 @@ export default [
         HTMLTextAreaElement: 'readonly',
         MouseEvent: 'readonly',
         Node: 'readonly',
+        process: 'readonly',
+        fetch: 'readonly',
+        RequestInit: 'readonly',
+        Response: 'readonly',
       },
     },
     plugins: {

src/MainLayout/NavBar/NavBar.tsx

@@ -32,7 +32,7 @@ const NavBar: React.FC = () => {
   };
 
   const handleLogout = () => {
-    // 这里可以添加登出逻辑
+    // Add logout logic here
     // TODO: Implement logout logic
   };
 

src/MainLayout/Sidebar/Sidebar.tsx

@@ -142,7 +142,7 @@ const Sidebar: React.FC = () => {
           </div>
         </div>
       )}
-      {/* 搜索弹窗 */}
+      {/* Search modal */}
       {showSearch && (
         <div className={styles.searchModalOverlay} onClick={() => setShowSearch(false)}>
           <div className={styles.searchModal} onClick={(e) => e.stopPropagation()}>

src/Pages/Chat/Chat.module.css

@@ -56,6 +56,28 @@
   font-weight: 400;
 }
 
+.apiWarning {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+  margin-top: 16px;
+  padding: 12px 16px;
+  background: #fef3c7;
+  border: 1px solid #f59e0b;
+  border-radius: 8px;
+  color: #92400e;
+  font-size: 0.875rem;
+  max-width: 500px;
+  margin-left: auto;
+  margin-right: auto;
+}
+
+.apiWarning svg {
+  flex-shrink: 0;
+  color: #f59e0b;
+}
+
 .chatInputContainer {
   margin-bottom: 40px;
 }

src/Pages/Chat/index.tsx

@@ -1,8 +1,9 @@
 import React, { useState, useRef, useEffect } from 'react';
-import { Send, Mic, Paperclip, Smile, Sparkles, Plus } from 'lucide-react';
+import { Send, Mic, Paperclip, Smile, Sparkles, Plus, AlertCircle } from 'lucide-react';
 import styles from './Chat.module.css';
 import { useChatStore, useCurrentMessages, Message } from '../../stores/chatStore';
 import { useUserStore } from '../../stores/userStore';
+import openAIService from '../../services/openaiService';
 
 const Chat: React.FC = () => {
   const [inputValue, setInputValue] = useState('');
@@ -14,7 +15,9 @@ const Chat: React.FC = () => {
 
   // translation function
   const t = (key: string) => {
-    const translations: { [key: string]: { [key: string]: string } } = {
+    const translations: {
+      [key: string]: { [key: string]: string };
+    } = {
       'en-US': {
         'chat.placeholder': 'Message ThinkML...',
         'chat.welcome.title': 'ThinkML',
@@ -25,6 +28,11 @@ const Chat: React.FC = () => {
         'chat.welcome.suggestion3': 'How to optimize website performance?',
         'chat.welcome.suggestion4': 'Write a simple todo app',
         'nav.newChat': 'New Chat',
+        'chat.error.api': 'API Error',
+        'chat.error.noApiKey':
+          'OpenAI API key not configured. Please set REACT_APP_OPENAI_API_KEY in your environment variables.',
+        'chat.error.network': 'Network error. Please check your connection.',
+        'chat.error.unknown': 'An unknown error occurred.',
       },
       'zh-CN': {
         'chat.placeholder': '发送消息给 ThinkML...',
@@ -36,6 +44,11 @@ const Chat: React.FC = () => {
         'chat.welcome.suggestion3': '如何优化网站性能？',
         'chat.welcome.suggestion4': '写一个简单的待办应用',
         'nav.newChat': '新建聊天',
+        'chat.error.api': 'API 错误',
+        'chat.error.noApiKey':
+          'OpenAI API 密钥未配置。请在环境变量中设置 REACT_APP_OPENAI_API_KEY。',
+        'chat.error.network': '网络错误。请检查您的连接。',
+        'chat.error.unknown': '发生未知错误。',
       },
       'ja-JP': {
         'chat.placeholder': 'ThinkMLにメッセージを送信...',
@@ -47,6 +60,11 @@ const Chat: React.FC = () => {
         'chat.welcome.suggestion3': 'ウェブサイトのパフォーマンスを最適化する方法は？',
         'chat.welcome.suggestion4': 'シンプルなTodoアプリを作成して',
         'nav.newChat': '新しいチャット',
+        'chat.error.api': 'API エラー',
+        'chat.error.noApiKey':
+          'OpenAI API キーが設定されていません。環境変数で REACT_APP_OPENAI_API_KEY を設定してください。',
+        'chat.error.network': 'ネットワークエラー。接続を確認してください。',
+        'chat.error.unknown': '不明なエラーが発生しました。',
       },
     };
 
@@ -83,17 +101,66 @@ const Chat: React.FC = () => {
     setInputValue('');
     setLoading(true);
 
-    // Simulate AI response
-    setTimeout(() => {
+    try {
+      // check api key
+      if (!openAIService.isConfigured()) {
+        throw new Error(t('chat.error.noApiKey'));
+      }
+
+      // api messages
+      const apiMessages = messages.map((msg) => ({
+        role: msg.role as 'user' | 'assistant',
+        content: msg.content,
+      }));
+
+      // add current user message
+      apiMessages.push({
+        role: 'user',
+        content: userMessage.content,
+      });
+
+      // call ChatGPT API
+      const response = await openAIService.chatCompletion(apiMessages, {
+        model: 'gpt-3.5-turbo',
+        maxTokens: 1000,
+        temperature: 0.7,
+      });
+
       const assistantMessage: Message = {
         id: (Date.now() + 1).toString(),
-        content: `I received your message: "${userMessage.content}". This is a simulated response. In a real application, this would call an AI API.`,
+        content: response,
         role: 'assistant',
         timestamp: new Date(),
       };
       addMessage(assistantMessage);
+    } catch (error) {
+      // eslint-disable-next-line no-console
+      console.error('Chat API Error:', error);
+
+      let errorMessage = t('chat.error.unknown');
+      if (error instanceof Error) {
+        if (error.message.includes('API key')) {
+          errorMessage = t('chat.error.noApiKey');
+        } else if (error.message.includes('fetch') || error.message.includes('network')) {
+          errorMessage = t('chat.error.network');
+        } else if (error.message.includes('quota')) {
+          errorMessage = 'API 配额已用完，已切换到模拟模式。请检查你的 OpenAI 账户余额。';
+        } else {
+          errorMessage = error.message;
+        }
+      }
+
+      // add error message to chat
+      const errorResponse: Message = {
+        id: (Date.now() + 1).toString(),
+        content: `❌ ${errorMessage}`,
+        role: 'assistant',
+        timestamp: new Date(),
+      };
+      addMessage(errorResponse);
+    } finally {
       setLoading(false);
-    }, 1000);
+    }
   };
 
   const handleKeyPress = (e: React.KeyboardEvent) => {
@@ -104,13 +171,16 @@ const Chat: React.FC = () => {
   };
 
   const handleNewChat = () => {
-    // 由Sidebar控制新建会话
+    // new chat by sidebar
     setInputValue('');
     setTimeout(() => {
       inputRef.current?.focus();
     }, 100);
   };
 
+  // check API configuration status
+  const apiConfigStatus = openAIService.getConfigurationStatus();
+
   return (
     <div className={styles.chatContainer}>
       {!hasStartedChat ? (
@@ -123,6 +193,14 @@ const Chat: React.FC = () => {
               </div>
               <h1 className={styles.welcomeTitle}>{t('chat.welcome.title')}</h1>
               <p className={styles.welcomeSubtitle}>{t('chat.welcome.subtitle')}</p>
+
+              {/* API configuration status hint */}
+              {!apiConfigStatus.configured && (
+                <div className={styles.apiWarning}>
+                  <AlertCircle size={16} />
+                  <span>{apiConfigStatus.message}</span>
+                </div>
+              )}
             </div>
 
             <div className={styles.chatInputContainer}>