window.dataLayer = window.dataLayer || [];

function norm(v) {
    return (v == null ? "" : String(v)).trim().toLowerCase();
}

async function sha256Hex(str) {
    const buf = await crypto.subtle.digest("SHA-256", new TextEncoder().encode(str));
    return Array.from(new Uint8Array(buf))
        .map(b => b.toString(16).padStart(2, "0"))
        .join("");
}

const HS_FIELDS = {
    first: "0-1/firstname",
    last: "0-1/lastname",
    email: "0-1/email",
    help: "0-1/how_did_you_hear_about_us___derris_",
    hear: "0-1/how_did_you_hear_about_us_",
    budget: "0-1/estimated_budget___"
};

function getVal(scopeEl, name) {
    const el = scopeEl.querySelector(`[name="${CSS.escape(name)}"]`);
    return el ? el.value : "";
}

function readFormFromScope(scopeEl) {
    return {
        first_name: norm(getVal(scopeEl, HS_FIELDS.first)),
        last_name: norm(getVal(scopeEl, HS_FIELDS.last)),
        email: norm(getVal(scopeEl, HS_FIELDS.email)),
        help: norm(getVal(scopeEl, HS_FIELDS.help)),
        hear: norm(getVal(scopeEl, HS_FIELDS.hear)),
        budget: norm(getVal(scopeEl, HS_FIELDS.budget))
    };
}

function pushDataLayer(payload) {
    window.dataLayer.push({
        event: "hubspot_form_submission",
        form_type: payload.form_type || "",
        first_name: payload.first_name || "",
        last_name: payload.last_name || "",
        email: payload.email || "",
        email_hash: payload.email_hash || "",
        help: payload.help || "",
        hear: payload.hear || "",
        budget: payload.budget || "",
        page_url: window.location.href
    });
}

function bindWrappers() {
    const wrappers = document.querySelectorAll(".hsfc-FormWrapper");

    wrappers.forEach((wrapper) => {
        if (wrapper.__hsDlBound) return;
        wrapper.__hsDlBound = true;

        wrapper.__hsPending = null;
        wrapper.__hsPushed = false;

        wrapper.addEventListener("submit", async function (e) {
            const formEl = e.target && e.target.closest ? e.target.closest("form") : null;
            if (!formEl) return;

            const payload = readFormFromScope(formEl);
            payload.email_hash = payload.email ? await sha256Hex(payload.email) : "";
            payload.form_type = "Contact";
            wrapper.__hsPending = payload;
        }, true);

        const obs = new MutationObserver(function () {
            if (wrapper.__hsPushed) return;

            if (wrapper.querySelector(".hsfc-PostSubmit")) {
                const pending = wrapper.__hsPending;

                if (pending && (pending.email || pending.first_name || pending.last_name)) {
                    pushDataLayer(pending);
                }

                wrapper.__hsPushed = true;
                obs.disconnect();
            }
        });

        obs.observe(wrapper, { childList: true, subtree: true });
    });
}

document.addEventListener("DOMContentLoaded", function () {
    bindWrappers();
    setTimeout(bindWrappers, 1500);
    setTimeout(bindWrappers, 4000);
});