const admin = require('firebase-admin');

function initFirebase() {
    try {
        if (!process.env.FIREBASE_SERVICE_ACCOUNT) {
            console.error("FCM Error: FIREBASE_SERVICE_ACCOUNT secret topilmadi!");
            return false;
        }
        
        const serviceAccount = JSON.parse(process.env.FIREBASE_SERVICE_ACCOUNT);
        
        admin.initializeApp({
            credential: admin.credential.cert(serviceAccount)
        });
        
        console.log("Firebase Admin SDK muvaffaqiyatli ulandi!");
        return true;
    } catch (e) {
        console.error("Firebase ulanish xatosi:", e.message);
        return false;
    }
}

async function sendPushToAll(title, message, imageUrl = null) {
    if (!admin.apps.length) {
        console.error("FCM ulanmagan!");
        return { success: false, error: "FCM ulanmagan" };
    }

    const payload = {
        notification: {
            title: title,
            body: message,
            image: imageUrl || undefined
        },
        topic: "promo"
    };

    try {
        const response = await admin.messaging().send(payload);
        return { success: true, response };
    } catch (error) {
        console.error("Push yuborishda xatolik:", error);
        return { success: false, error: error.message };
    }
}

module.exports = {
    initFirebase,
    sendPushToAll
};