Backend is here. Default admin is created if needed.

server/src/routes/ai.ts

@@ -0,0 +1,52 @@
+import express from 'express';
+import { GoogleGenerativeAI } from '@google/generative-ai';
+import jwt from 'jsonwebtoken';
+
+const router = express.Router();
+const JWT_SECRET = process.env.JWT_SECRET || 'secret';
+const API_KEY = process.env.API_KEY;
+const MODEL_ID = 'gemini-1.5-flash';
+
+const authenticate = (req: any, res: any, next: any) => {
+    const token = req.headers.authorization?.split(' ')[1];
+    if (!token) return res.status(401).json({ error: 'Unauthorized' });
+
+    try {
+        const decoded = jwt.verify(token, JWT_SECRET) as any;
+        req.user = decoded;
+        next();
+    } catch {
+        res.status(401).json({ error: 'Invalid token' });
+    }
+};
+
+router.use(authenticate);
+
+router.post('/chat', async (req, res) => {
+    try {
+        const { history, message } = req.body;
+
+        if (!API_KEY) {
+            return res.status(500).json({ error: 'AI service not configured' });
+        }
+
+        const ai = new GoogleGenerativeAI(API_KEY);
+
+        const { systemInstruction, userMessage } = req.body;
+
+        const model = ai.getGenerativeModel({
+            model: MODEL_ID,
+            systemInstruction
+        });
+
+        const result = await model.generateContent(userMessage);
+        const response = result.response.text();
+
+        res.json({ response });
+    } catch (error) {
+        console.error(error);
+        res.status(500).json({ error: String(error) });
+    }
+});
+
+export default router;