initial

books/services/geminiService.ts

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+
+import { GoogleGenAI, Type } from "@google/genai";
+
+const BOOK_DATA_SCHEMA = {
+  type: Type.OBJECT,
+  properties: {
+    title: { type: Type.STRING, description: 'Title of the book' },
+    author: { type: Type.STRING, description: 'Author of the book' },
+    genre: { type: Type.STRING, description: 'Main genre of the book' },
+    annotation: { type: Type.STRING, description: 'Brief summary or annotation' },
+    pages: { type: Type.NUMBER, description: 'Approximate number of pages' },
+    language: { type: Type.STRING, description: 'Language of the book' },
+    publishedYear: { type: Type.NUMBER, description: 'Approximate publication year' }
+  },
+  required: ['title', 'author', 'genre']
+};
+
+export async function extractBookData(base64Image: string) {
+  // Ensure we use the exact initialization pattern from guidelines
+  const ai = new GoogleGenAI({ apiKey: process.env.API_KEY });
+  
+  try {
+    // Use gemini-3-flash-preview for multimodal extraction tasks
+    const response = await ai.models.generateContent({
+      model: 'gemini-3-flash-preview',
+      contents: {
+        parts: [
+          { 
+            inlineData: { 
+              mimeType: 'image/jpeg', 
+              data: base64Image.replace(/^data:image\/[a-z]+;base64,/, "") 
+            } 
+          },
+          { text: "Identify this book from the cover. Extract the title, author, genre, and a brief annotation in Russian. Return the information in structured JSON format." }
+        ]
+      },
+      config: {
+        responseMimeType: "application/json",
+        responseSchema: BOOK_DATA_SCHEMA
+      }
+    });
+
+    const text = response.text;
+    if (!text) throw new Error("No response from model");
+    
+    return JSON.parse(text);
+  } catch (error: any) {
+    console.error("Failed to extract book data:", error);
+    // Log specific details if available
+    if (error.message) {
+      console.error("Error Message:", error.message);
+    }
+    throw error;
+  }
+}