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

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

const HS_FIELDS = {
    hear: "0-1/how_did_you_hear_about_us_"
};

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

function readFormFromScope(scopeEl) {
    return {
        hear: norm(getVal(scopeEl, HS_FIELDS.hear))
    };
}

function pushDataLayer(payload) {
    window.dataLayer.push({
        event: "hubspot_form_submission",
        form_type: payload.form_type || "",
        hear: payload.hear || "",
        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", function (e) {
            const formEl = e.target && e.target.closest ? e.target.closest("form") : null;
            if (!formEl) return;

            const payload = readFormFromScope(formEl);
            payload.form_type = "New business";
            wrapper.__hsPending = payload;
        }, true);

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

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

                if (pending) {
                    pushDataLayer(pending);
                }

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

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

function initHsDl() {
    bindWrappers();
    setTimeout(bindWrappers, 250);
    setTimeout(bindWrappers, 1000);
    setTimeout(bindWrappers, 2500);
}

if (document.readyState === "loading") {
    document.addEventListener("DOMContentLoaded", initHsDl);
} else {
    initHsDl();
}