(function () {
    'use strict';

    function trackEvent(action, params) {
        window.dataLayer = window.dataLayer || [];
        window.dataLayer.push(Object.assign({
            event: 'nav_event',
            nav_action: action
        }, params));
    }

    document.addEventListener('DOMContentLoaded', function () {
        // 1. Track clicks on the main logo
        var logo = document.querySelector('.main-nav-logo, .main-nav-logo img');
        if (logo) {
            var a = logo.closest('a') || logo;
            a.addEventListener('click', function () {
                trackEvent('nav_logo_click', {
                    event_label: 'EDD Home Logo',
                    nav_type: 'desktop'
                });
            });
        }

        // 2. Track opening/closing of the mobile nav toggle
        var mobToggle = document.querySelector('.mobile-nav-toggle');
        if (mobToggle) {
            mobToggle.addEventListener('click', function () {
                var open = this.getAttribute('aria-expanded') === 'true';
                trackEvent(open ? 'mobile_nav_open' : 'mobile_nav_close', {
                    event_label: 'Mobile Nav Toggle'
                });
            });
        }

        // 3. Direct listeners on every top-level button (bypasses any stopPropagation)
        var topButtons = document.querySelectorAll('button.main-nav-link, button.mobile-nav-link');
        topButtons.forEach(function (btn) {
            btn.addEventListener('click', function () {
                var isMobile = !!btn.closest('.mobile-nav'),
                    text = btn.textContent.trim(),
                    hasExp = btn.hasAttribute('aria-expanded'),
                    expanded = hasExp && btn.getAttribute('aria-expanded') === 'true',
                    eventName;

                if (hasExp) {
                    eventName = expanded
                        ? (isMobile ? 'mobile_section_close' : 'desktop_section_close')
                        : (isMobile ? 'mobile_section_open' : 'desktop_section_open');
                } else {
                    eventName = isMobile
                        ? 'mobile_primary_button_click'
                        : 'desktop_primary_button_click';
                }

                trackEvent(eventName, {
                    event_label: text,
                    nav_type: isMobile ? 'mobile' : 'desktop'
                });
            });
        });

        // 4. Delegate clicks on any sub-menu link
        document.body.addEventListener('click', function (e) {
            var sub = e.target.closest('ul.submenu a, ul.mobile-submenu a');
            if (!sub) return;

            var child = sub.textContent.trim(),
                parentBtn = sub.closest('li').querySelector('button.main-nav-link, button.mobile-nav-link'),
                parent = parentBtn ? parentBtn.textContent.trim() : 'unknown',
                isMobile = !!sub.closest('.mobile-nav');

            trackEvent('nav_submenu_click', {
                event_label: parent + ' → ' + child,
                nav_type: isMobile ? 'mobile' : 'desktop'
            });
        });

        // 5. Delegate clicks on the two static <a> links in mobile nav
        document.body.addEventListener('click', function (e) {
            var staticLink = e.target.closest('.mobile-nav-list > li.mobile-nav-item > a');
            if (!staticLink) return;

            trackEvent('mobile_primary_link_click', {
                event_label: staticLink.textContent.trim(),
                nav_type: 'mobile'
            });
        });
    });
})();