/* Только внешний каркас; формы и таблицы разделов сохраняют свои обработчики. */
(function (window, document) {
    'use strict';

    function initialize() {
        var header = document.getElementById('fi-shell-header');
        if (!header || header.getAttribute('data-initialized') === '1') {
            return;
        }
        header.setAttribute('data-initialized', '1');
        document.body.classList.add('fi-shell-page');

        var toggle = header.querySelector('[data-shell-menu-toggle]');
        var navigation = document.getElementById('fi-shell-navigation');
        function closeMenu(restoreFocus) {
            header.classList.remove('is-menu-open');
            toggle.setAttribute('aria-expanded', 'false');
            if (restoreFocus) { toggle.focus(); }
        }
        toggle.addEventListener('click', function () {
            var opened = !header.classList.contains('is-menu-open');
            header.classList.toggle('is-menu-open', opened);
            toggle.setAttribute('aria-expanded', opened ? 'true' : 'false');
        });
        document.addEventListener('click', function (event) {
            if (!header.contains(event.target)) { closeMenu(false); }
        });
        navigation.addEventListener('click', function (event) {
            if (event.target.closest('a')) { closeMenu(false); }
        });
        document.addEventListener('keydown', function (event) {
            if (event.key === 'Escape' && header.classList.contains('is-menu-open')) { closeMenu(true); }
        });
        window.addEventListener('resize', function () {
            if (window.matchMedia('(min-width: 721px)').matches) { closeMenu(false); }
        });

        var signIn = header.querySelector('[data-shell-login]');
        if (signIn) {
            var login = document.getElementById('fi-shell-login-panel');
            signIn.addEventListener('click', function () {
                login.hidden = !login.hidden;
                signIn.setAttribute('aria-expanded', login.hidden ? 'false' : 'true');
                if (!login.hidden) { login.querySelector('#email').focus(); }
            });
        }

        // Перемещаем только корневые контейнеры. Узлы, ID и обработчики внутри не меняются.
        var roots = document.querySelectorAll('.main_page_box, #admin-modern');
        Array.prototype.forEach.call(roots, function (root) {
            if (root.closest('.fi-shell-main') || root.closest('.modal, dialog') || root.parentElement !== document.body) {
                return;
            }
            var frame = document.createElement('div');
            frame.className = 'fi-shell-main';
            root.parentElement.insertBefore(frame, root);
            frame.appendChild(root);
        });
        var footer = document.createElement('footer');
        footer.className = 'fi-shell-footer';
        var brand = document.createElement('a');
        brand.href = '/';
        brand.textContent = '© ' + header.getAttribute('data-year') + ' FeisInfo';
        var caption = document.createElement('span');
        caption.textContent = header.getAttribute('data-footer');
        footer.appendChild(brand);
        footer.appendChild(caption);
        document.body.appendChild(footer);

        var form = document.querySelector('[data-shell-event-form]');
        var select = form.querySelector('#feis_select');
        var nativeSubmit = form.querySelector('[data-shell-native-submit]');
        var status = document.querySelector('[data-shell-event-status]');
        var previous = select.value;
        if (!window.jQuery || select.disabled) { return; }
        nativeSubmit.hidden = true;
        form.addEventListener('submit', function (event) { event.preventDefault(); });
        select.addEventListener('change', function () {
            if (form.getAttribute('aria-busy') === 'true' || select.value === previous) { return; }
            var value = select.value;
            select.disabled = true;
            form.setAttribute('aria-busy', 'true');
            status.textContent = header.getAttribute('data-saving');
            window.jQuery.ajax({
                url: '/home/select_feis.php',
                type: 'POST',
                dataType: 'json',
                timeout: 15000,
                data: { feis_id: value, token: header.getAttribute('data-token') },
                success: function (response) {
                    if (response && response.status === 'ok' && String(response.feis_id) === value) {
                        var currentUrl = new URL(window.location.href);
                        var spectatorPage = currentUrl.pathname === '/visitor/'
                            || currentUrl.pathname === '/visitor/index.php' || currentUrl.pathname === '/visitor';
                        if (spectatorPage && currentUrl.searchParams.has('event')) {
                            if (Number(value) > 0) { currentUrl.searchParams.set('event', value); }
                            else { currentUrl.searchParams.delete('event'); }
                            window.location.assign(currentUrl.toString());
                        } else {
                            window.location.reload();
                        }
                    } else {
                        select.value = previous;
                        status.textContent = header.getAttribute('data-error');
                    }
                },
                error: function () {
                    select.value = previous;
                    status.textContent = header.getAttribute('data-error');
                },
                complete: function () {
                    select.disabled = false;
                    form.setAttribute('aria-busy', 'false');
                }
            });
        });
    }
    if (window.jQuery) {
        // Регистрируем каркас раньше ready-обработчиков вкладок и таблиц раздела.
        window.jQuery(initialize);
    } else if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', initialize);
    } else {
        initialize();
    }
})(window, document);