import { isAuthenticatedAsAdmin } from './api.js';
import { applyRippleEffect, closeAllDropdownsOnOutsideClick } from './utils.js';

import { initUsers } from './views/users.js';
import { initGroups } from './views/groups.js';
import { initEduForms } from './views/edu-forms.js';
import { initEquipments } from './views/equipments.js';
import { initClassrooms } from './views/classrooms.js';
import { initSubjects } from './views/subjects.js';

// Configuration
const ROUTES = {
    users: { title: 'Управление пользователями', file: 'views/users.html', init: initUsers },
    groups: { title: 'Управление группами', file: 'views/groups.html', init: initGroups },
    'edu-forms': { title: 'Формы обучения', file: 'views/edu-forms.html', init: initEduForms },
    equipments: { title: 'Оборудование', file: 'views/equipments.html', init: initEquipments },
    classrooms: { title: 'Аудитории', file: 'views/classrooms.html', init: initClassrooms },
    subjects: { title: 'Дисциплины и преподаватели', file: 'views/subjects.html', init: initSubjects },
};

let currentTab = null;

// DOM Elements
const appContent = document.getElementById('app-content');
const pageTitle = document.getElementById('page-title');
const navItems = document.querySelectorAll('.nav-item[data-tab]');
const sidebar = document.querySelector('.sidebar');
const sidebarOverlay = document.getElementById('sidebar-overlay');
const menuToggle = document.getElementById('menu-toggle');
const btnLogout = document.getElementById('btn-logout');

// Initial auth check
if (!isAuthenticatedAsAdmin()) {
    window.location.href = '/';
}

// Setup Global Effects
applyRippleEffect();
closeAllDropdownsOnOutsideClick();

// Menu Toggle
menuToggle.addEventListener('click', () => {
    sidebar.classList.toggle('open');
    sidebarOverlay.classList.toggle('open');
});
sidebarOverlay.addEventListener('click', () => {
    sidebar.classList.remove('open');
    sidebarOverlay.classList.remove('open');
});

// Logout
btnLogout.addEventListener('click', () => {
    localStorage.removeItem('token');
    localStorage.removeItem('role');
    window.location.href = '/';
});

// Navigation
navItems.forEach(item => {
    item.addEventListener('click', (e) => {
        e.preventDefault();
        const tab = item.dataset.tab;
        switchTab(tab);
    });
});

async function switchTab(tab) {
    if (currentTab === tab || !ROUTES[tab]) return;

    // UI Update
    navItems.forEach(n => n.classList.remove('active'));
    document.querySelector(`.nav-item[data-tab="${tab}"]`)?.classList.add('active');
    pageTitle.textContent = ROUTES[tab].title;

    // Load template
    try {
        appContent.innerHTML = '<div class="loading-row">Загрузка...</div>';
        const response = await fetch(ROUTES[tab].file);
        if (!response.ok) throw new Error('Failed to load view');

        const html = await response.text();
        appContent.innerHTML = html;

        // Initialize logic for the tab
        if (ROUTES[tab].init) {
            ROUTES[tab].init();
        }

        currentTab = tab;
    } catch (e) {
        appContent.innerHTML = `<div class="form-alert error">Ошибка загрузки вкладки: ${e.message}</div>`;
        console.error(e);
    }

    // Close mobile menu if open
    sidebar.classList.remove('open');
    sidebarOverlay.classList.remove('open');
}

// Load default tab
switchTab('users');