firebase-admin.ts

import { initializeApp, getApps, App, cert } from 'firebase-admin/app';
import { getFirestore } from 'firebase-admin/firestore';

let app: App;

const projectId = process.env.NEXT_PUBLIC_FIREBASE_PROJECT_ID;
const clientEmail = process.env.FIREBASE_CLIENT_EMAIL;
const privateKey = process.env.FIREBASE_PRIVATE_KEY;

if (!projectId || !clientEmail || !privateKey) {
    console.error("❌ Missing Firebase Admin credentials in environment variables");
    throw new Error("Missing Firebase Admin environment variables. Please check your .env.local file.");
}

if (getApps().length === 0) {
    try {
        const credential = {
            projectId: projectId,
            clientEmail: clientEmail,
            privateKey: privateKey.replace(/\\n/g, '\n'),
        };

        app = initializeApp({
            credential: cert(credential)
        });
        
    } catch (error: any) {
        console.error("❌ Firebase Admin initialization failed:");
        console.error("Error message:", error.message);
        console.error("Error code:", error.code);
        console.error("Full error:", error);
        throw error;
    }
} else {
    app = getApps()[0];
    console.log("Using existing Firebase Admin instance");
}

const adminDb = getFirestore(app);

export { app as adminApp, adminDb };