import './motion.js';

document.addEventListener('DOMContentLoaded', () => {
    const menuButton = document.querySelector('[data-menu-button]');
    const navigation = document.querySelector('[data-main-nav]');

    if (menuButton && navigation) {
        const isDesktop = () => window.matchMedia('(min-width: 768px)').matches;
        const isMenuOpen = () => navigation.classList.contains('is-open');

        const setOpen = (isOpen, { returnFocus = false } = {}) => {
            navigation.classList.toggle('is-open', isOpen);
            navigation.classList.toggle('hidden', !isOpen && !isDesktop());
            navigation.classList.toggle('flex', isOpen || isDesktop());
            document.body.classList.toggle('menu-open', isOpen);
            menuButton.setAttribute('aria-expanded', String(isOpen));
            menuButton.setAttribute('aria-label', isOpen ? 'Fechar menu' : 'Abrir menu');

            if (!isOpen && returnFocus) {
                menuButton.focus();
            }
        };

        menuButton.addEventListener('click', () => {
            const isOpen = menuButton.getAttribute('aria-expanded') !== 'true';
            setOpen(isOpen);

            if (isOpen) {
                const firstLink = navigation.querySelector('a');
                if (firstLink) {
                    firstLink.focus();
                }
            }
        });

        navigation.querySelectorAll('a').forEach((link) => {
            link.addEventListener('click', () => setOpen(false));
        });

        navigation.addEventListener('keydown', (event) => {
            if (event.key === 'Escape') {
                setOpen(false, { returnFocus: true });

                return;
            }

            if (event.key === 'Tab' && !isDesktop() && isMenuOpen()) {
                const focusables = navigation.querySelectorAll('a[href], button:not([disabled])');

                if (focusables.length === 0) {
                    return;
                }

                const first = focusables[0];
                const last = focusables[focusables.length - 1];

                if (event.shiftKey && document.activeElement === first) {
                    event.preventDefault();
                    last.focus();
                } else if (!event.shiftKey && document.activeElement === last) {
                    event.preventDefault();
                    first.focus();
                }
            }
        });

        window.matchMedia('(min-width: 768px)').addEventListener('change', (event) => {
            setOpen(false);

            if (event.matches) {
                navigation.classList.remove('hidden');
                navigation.classList.add('flex');
            }
        });
    }

    document.querySelectorAll('form[data-contact-form]').forEach((form) => {
        const submitButton = form.querySelector('[data-submit-button]');

        const resetSubmitState = () => {
            form.removeAttribute('aria-busy');
            form.removeAttribute('aria-disabled');

            if (submitButton) {
                submitButton.disabled = false;
                submitButton.textContent = submitButton.dataset.defaultLabel ?? 'Enviar briefing';
                submitButton.removeAttribute('aria-busy');
            }
        };

        form.addEventListener('submit', () => {
            if (submitButton) {
                submitButton.dataset.defaultLabel ??= submitButton.textContent.trim();
                submitButton.textContent = 'Enviando…';
                submitButton.disabled = true;
                submitButton.setAttribute('aria-busy', 'true');
            }

            form.setAttribute('aria-busy', 'true');
        });

        window.addEventListener('pageshow', (event) => {
            if (event.persisted) {
                resetSubmitState();
            }
        });
    });
});