// Firebase V9 ESM seulement
import { initializeApp } from "https://www.gstatic.com/firebasejs/9.6.1/firebase-app.js";
import {
    getAuth,
    createUserWithEmailAndPassword,
    signInWithEmailAndPassword,
    onAuthStateChanged,
    signOut
} from "https://www.gstatic.com/firebasejs/9.6.1/firebase-auth.js";

import {
    getFirestore,
    collection,
    addDoc,
    doc,
    setDoc
} from "https://www.gstatic.com/firebasejs/9.6.1/firebase-firestore.js";

const firebaseConfig = {
    apiKey: "AIzaSyBXKB6AGbTN95lOLrIVpWrSIK_uL_C6GUA",
    authDomain: "music-app-riotjs.firebaseapp.com",
    projectId: "music-app-riotjs",
    storageBucket: "music-app-riotjs.firebasestorage.app",
    messagingSenderId: "483729603961",
    appId: "1:483729603961:web:122965ce7dbeb2e85103a8",
    measurementId: "G-18P6WCT80"
};

const app = initializeApp(firebaseConfig);
const auth = getAuth(app);
const db = getFirestore(app);

export async function login(email, password) {
    await signInWithEmailAndPassword(auth, email, password);
}

export async function sign(email, password) {
    const userCred = await createUserWithEmailAndPassword(auth, email, password);
    await adduserdata(userCred.user.email);
}

export async function adduserdata(email_user) {
    await addDoc(collection(db, "users"), {
        email: email_user
    });
}

export async function logout() {
    await signOut(auth);
}

window.observeAuthState = function(callback) {
    onAuthStateChanged(auth, callback);
};

export async function favorite(releaseId) {
    const user = auth.currentUser;
    if (!user) return;
    await addDoc(collection(db, "users", user.email, "favorites"), {
        id: releaseId
    });
}

export async function getFavorites() {
    const user = auth.currentUser;
    if (!user) {
        console.warn("Aucun utilisateur connecté.");
        return [];
    }

    const userDocRef = doc(db, "users", user.email);
    const favsCollection = collection(userDocRef, "favorites");

    const snapshot = await getDocs(favsCollection);
    const favorites = snapshot.docs.map(doc => doc.data());

    return favorites;
}

window.login = login;
window.sign = sign;
window.logout = logout;
window.favorite = favorite;
window.getFavorites = getFavorites;