import { initializeApp } from "https://www.gstatic.com/firebasejs/10.12.0/firebase-app.js";
import {
    getFirestore,
    collection,
    addDoc,
    serverTimestamp
} from "https://www.gstatic.com/firebasejs/10.12.0/firebase-firestore.js";
import {
    getStorage,
    ref,
    uploadBytes,
    getDownloadURL
} from "https://www.gstatic.com/firebasejs/10.12.0/firebase-storage.js";

const firebaseConfig = {
    apiKey: "AIzaSyDG0b8DFgY0EzWXze3rJdzyy7CDhnSHNjI",
    authDomain: "amg-admin-637c2.firebaseapp.com",
    projectId: "amg-admin-637c2",
    storageBucket: "amg-admin-637c2.firebasestorage.app",
    messagingSenderId: "800937803275",
    appId: "1:800937803275:web:a116b9dbb96365045f510e"
};

const EMAILJS_PUBLIC_KEY = "fJEZgUSn3fGMW0IKW";
const EMAILJS_SERVICE_ID = "service_jjryfbn";
const EMAILJS_TEMPLATE_ID = "template_oui6gvz";

const app = initializeApp(firebaseConfig);
const db = getFirestore(app);
const storage = getStorage(app);

if (window.emailjs) {
    window.emailjs.init(EMAILJS_PUBLIC_KEY);
}

const btnStep2 = document.getElementById("btn-step2");

function isValidEmail(email) {
    return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email);
}

function sanitizeFileName(name) {
    return name.replace(/[^\w.\-]/g, "_");
}

if (btnStep2) {
    btnStep2.addEventListener("click", async () => {
        const btn = btnStep2;

        const nom = document.getElementById("f-nom")?.value.trim() || "";
        const email = document.getElementById("f-email")?.value.trim() || "";
        const tel = document.getElementById("f-tel")?.value.trim() || "Non renseigné";
        const poste = document.getElementById("f-poste")?.value || "";
        const experience = document.querySelector("select[name='user_experience']")?.value || "Non renseigné";

        const cvInput = document.getElementById("cv");
        const cvFile = cvInput?.files?.[0] || null;

        if (!nom || !email || !poste) {
            alert("Merci de remplir tous les champs obligatoires.");
            return;
        }

        if (!isValidEmail(email)) {
            alert("L'adresse e-mail n'est pas valide.");
            return;
        }

        btn.innerHTML = '<i class="fas fa-spinner fa-spin"></i> Envoi en cours...';
        btn.disabled = true;

        try {
            let cvFilename = "Aucun fichier joint";
            let cvUrl = "";
            let cvPath = "";

            if (cvFile) {
                cvFilename = cvFile.name;

                const safeFileName = sanitizeFileName(cvFile.name);
                const filePath = `cvs/${Date.now()}_${safeFileName}`;
                const storageRef = ref(storage, filePath);

                await uploadBytes(storageRef, cvFile);
                cvUrl = await getDownloadURL(storageRef);
                cvPath = filePath;
            }

            if (!window.emailjs) {
                throw new Error("EmailJS n'est pas chargé sur la page.");
            }

            await window.emailjs.send(
                EMAILJS_SERVICE_ID,
                EMAILJS_TEMPLATE_ID,
                {
                    user_name: nom,
                    user_email: email,
                    user_phone: tel,
                    user_post: poste,
                    user_experience: experience,
                    cv_filename: cvFilename
                }
            );

            await addDoc(collection(db, "candidatures"), {
                nom,
                email,
                tel,
                poste,
                experience,
                cv_filename: cvFilename,
                cv_url: cvUrl,
                cv_path: cvPath,
                statut: "nouveau",
                createdAt: serverTimestamp()
            });

            btn.innerHTML = '<i class="fas fa-check"></i> Envoye';

            if (typeof window.goToStep === "function") {
                window.goToStep(2);
            }
        } catch (error) {
            console.error("Erreur lors de l'envoi :", error);
            btn.innerHTML = "Erreur - Reessayer";
            btn.style.background = "#8b2020";
            btn.disabled = false;
        }
    });
}