appointmentRetriever.ts

'use server';
/**
 * @fileOverview Defines a Firestore retriever for the 'services' collection.
 */

import { defineFirestoreRetriever } from '@genkit-ai/firebase';
import { getFirestore } from 'firebase-admin/firestore';
import { ai } from '@/ai/genkit';
import type { ServiceItem } from '@/types';
import { getFirebaseAdminApp } from '../firebase-service';

const adminApp = getFirebaseAdminApp();
const firestore = getFirestore(adminApp);

export const serviceRetriever = defineFirestoreRetriever(ai, {
  name: 'serviceRetriever',
  firestore,
  collection: 'services',
  contentField: 'description', // Primary text field for the document
  vectorField: 'embedding',    // Field containing vector embeddings
  embedder: 'googleai/text-embedding-004', // Embedder used for querying
  distanceMeasure: 'COSINE',
  metadataFields: (snapshot)=> {
    const data = snapshot.data() as ServiceItem;
    return {
      name: data.name,
      description: data.description,
      id: snapshot.id,
    };
  }
});