// Router - Single Page Application routing
class Router {
    constructor() {
        this.routes = {
            'login': { module: 'authModule', handler: this.handleLogin.bind(this) },
            'register': { module: 'authModule', handler: this.handleLogin.bind(this) },
            'dashboard': { module: 'dashboardModule', requireAuth: true, handler: this.handleDashboard.bind(this) },
            'databases': { module: 'dashboardModule', requireAuth: true, handler: this.handleDatabases.bind(this) },
            'tables': { module: 'dashboardModule', requireAuth: true, handler: this.handleTables.bind(this) },
            'queries': { module: 'dashboardModule', requireAuth: true, handler: this.handleQueries.bind(this) },
            'admin-users': { module: 'adminModule', requireAuth: true, requireAdmin: true, handler: this.handleAdminUsers.bind(this) },
            'admin-roles': { module: 'adminModule', requireAuth: true, requireAdmin: true, handler: this.handleAdminRoles.bind(this) },
            'admin-settings': { module: 'adminModule', requireAuth: true, requireAdmin: true, handler: this.handleAdminSettings.bind(this) },
            'admin-logs': { module: 'adminModule', requireAuth: true, requireAdmin: true, handler: this.handleAdminLogs.bind(this) },
            'admin-database': { module: 'adminModule', requireAuth: true, requireAdmin: true, handler: this.handleAdminDatabase.bind(this) },
            'admin-backups': { module: 'adminModule', requireAuth: true, requireAdmin: true, handler: this.handleAdminBackups.bind(this) },
        };

        this.currentRoute = null;
        this.modules = {};

        this.init();
    }

    async init() {
        // Load modules
        await this.loadModules();

        // Setup hash change listener
        window.addEventListener('hashchange', () => this.navigate());

        // Initial navigation
        this.navigate();
    }

    async loadModules() {
        const modules = ['auth', 'dashboard', 'admin'];

        for (const module of modules) {
            try {
                const response = await fetch(`/modules/${module}/${module === 'auth' ? 'login' : module === 'admin' ? 'admin-panel' : 'dashboard'}.html`);
                if (response.ok) {
                    const html = await response.text();
                    const container = document.createElement('div');
                    container.innerHTML = html;
                    document.getElementById('app').appendChild(container);
                }
            } catch (error) {
                console.error(`Failed to load ${module} module:`, error);
            }
        }

        // Update Lucide icons after loading modules
        if (typeof lucide !== 'undefined') {
            lucide.createIcons();
        }
    }

    navigate() {
        const hash = window.location.hash.slice(1) || 'login';
        const route = this.routes[hash];

        if (!route) {
            window.location.hash = '#login';
            return;
        }

        // Check authentication
        if (route.requireAuth && !auth.isAuthenticated) {
            window.location.hash = '#login';
            return;
        }

        // Check admin permission
        if (route.requireAdmin && !auth.isAdmin()) {
            window.location.hash = '#dashboard';
            return;
        }

        // Hide all modules
        document.querySelectorAll('[id$="Module"]').forEach(mod => {
            mod.classList.add('hidden');
        });

        // Show target module
        const module = document.getElementById(route.module);
        if (module) {
            module.classList.remove('hidden');
        }

        // Close sidebars on mobile when navigating
        const sidebars = document.querySelectorAll('[id$="Sidebar"]');
        sidebars.forEach(sidebar => {
            sidebar.classList.add('hidden');
        });

        // Call route handler
        if (route.handler) {
            route.handler();
        }

        // Setup navigation event listeners for current route
        this.setupNavigation();

        // Update Lucide icons
        if (typeof lucide !== 'undefined') {
            lucide.createIcons();
        }

        this.currentRoute = hash;
    }

    setupNavigation() {
        // Sidebar toggle
        const toggleBtn = document.getElementById('toggleSidebar');
        const sidebar = document.getElementById('sidebar');
        if (toggleBtn && sidebar) {
            toggleBtn.onclick = () => sidebar.classList.toggle('-translate-x-full');
        }

        // Admin sidebar toggle
        const toggleAdminBtn = document.getElementById('toggleAdminSidebar');
        const adminSidebar = document.getElementById('adminSidebar');
        if (toggleAdminBtn && adminSidebar) {
            toggleAdminBtn.onclick = () => adminSidebar.classList.toggle('-translate-x-full');
        }

        // Logout buttons
        const logoutBtn = document.getElementById('logoutBtn');
        if (logoutBtn) {
            logoutBtn.onclick = () => {
                if (confirm('Вы уверены, что хотите выйти?')) {
                    auth.logout();
                }
            };
        }

        const adminLogoutBtn = document.getElementById('adminLogoutBtn');
        if (adminLogoutBtn) {
            adminLogoutBtn.onclick = () => {
                if (confirm('Вы уверены, что хотите выйти?')) {
                    auth.logout();
                }
            };
        }

        // Update user info
        if (auth.isAuthenticated && auth.user) {
            const userName = document.getElementById('userName');
            const userRole = document.getElementById('userRole');
            const avatarCircle = document.getElementById('avatarCircle');

            if (userName) userName.textContent = auth.user.name || 'User';
            if (userRole) userRole.textContent = this.getRoleName(auth.user.role);
            if (avatarCircle) avatarCircle.textContent = (auth.user.name || 'A').charAt(0).toUpperCase();
        }

        // Navigation items
        const navItems = document.querySelectorAll('.nav-item');
        navItems.forEach(item => {
            item.classList.remove('active');

            if (item.getAttribute('href') === `#${this.currentRoute}`) {
                item.classList.add('active');
            }

            item.addEventListener('click', () => {
                navItems.forEach(n => n.classList.remove('active'));
                item.classList.add('active');

                // Close sidebar on mobile
                const sidebar = document.getElementById('sidebar') || document.getElementById('adminSidebar');
                if (sidebar) {
                    sidebar.classList.add('-translate-x-full');
                }
            });
        });
    }

    getRoleName(role) {
        const names = {
            'superadmin': 'Суперадминистратор',
            'admin': 'Администратор',
            'moderator': 'Модератор',
            'viewer': 'Только просмотр'
        };
        return names[role] || role;
    }

    // Route handlers
    handleLogin() { }
    handleDashboard() { }
    handleDatabases() { }
    handleTables() { }
    handleQueries() { }
    handleAdminUsers() { }
    handleAdminRoles() { }
    handleAdminSettings() { }
    handleAdminLogs() { }
    handleAdminDatabase() { }
    handleAdminBackups() { }
}

// Initialize router
const router = new Router();