// Admin Components Loader
class AdminApp {
    constructor() {
        this.currentUser = null;
        this.currentSection = 'dashboard';
        this.components = {
            sidebar: '/admin/sidebar.html',
            topbar: '/admin/topbar.html',
            sections: {
                dashboard: '/admin/dashboard.html',
                properties: '/admin/properties.html',
                leads: '/admin/leads.html',
                testimonials: '/admin/testimonials.html',
                faq: '/admin/faq.html',
                services: '/admin/services.html',
                settings: '/admin/settings.html'
            }
        };
    }

    async init() {
        try {
            await this.checkAuth();
            await this.loadComponent('sidebar', '#sidebar-container');
            await this.loadComponent('topbar', '#topbar-container');
            await this.loadSection(this.currentSection);
            this.setupNavigation();
            this.setupTopbar();
            console.log('Admin app initialized');
        } catch (e) {
            console.error('Init failed:', e);
            window.location.href = '/login';
        }
    }

    async checkAuth() {
        const res = await API.getMe();
        if (!res.success || !res.data) {
            throw new Error('Not authenticated');
        }
        this.currentUser = res.data;
        localStorage.setItem('user', JSON.stringify(this.currentUser));
    }

    async loadComponent(name, container) {
        try {
            const response = await fetch(this.components[name]);
            if (!response.ok) throw new Error(`Failed to load ${name}`);
            const html = await response.text();
            const element = document.querySelector(container);
            if (element) {
                element.innerHTML = html;
                this.executeScripts(element);
            }
        } catch (e) {
            console.error(`Failed to load component ${name}:`, e);
        }
    }

    async loadSection(sectionName) {
        const sectionPath = this.components.sections[sectionName];
        if (!sectionPath) {
            console.error('Unknown section:', sectionName);
            return;
        }

        try {
            const response = await fetch(sectionPath);
            if (!response.ok) throw new Error(`Failed to load section ${sectionName}`);
            const html = await response.text();
            
            // Hide all sections
            document.querySelectorAll('.section').forEach(s => s.classList.remove('active'));
            
            // Remove old section if exists
            const oldSection = document.getElementById(`section-${sectionName}`);
            if (oldSection) {
                oldSection.remove();
            }
            
            // Add new section
            const mainContent = document.getElementById('main-content');
            if (mainContent) {
                const div = document.createElement('div');
                div.innerHTML = html;
                const section = div.firstElementChild;
                section.classList.add('active');
                mainContent.appendChild(section);
                this.executeScripts(section);
            }
            
            // Load section data
            await this.loadSectionData(sectionName);
            
            // Update page title
            this.updatePageTitle(sectionName);
            
        } catch (e) {
            console.error(`Failed to load section ${sectionName}:`, e);
        }
    }

    async loadSectionData(sectionName) {
        const loaders = {
            'dashboard': loadDashboard,
            'properties': loadProperties,
            'leads': loadLeads,
            'testimonials': loadTestimonials,
            'faq': loadFAQ,
            'services': loadServices,
            'settings': loadSettings
        };

        if (loaders[sectionName]) {
            await loaders[sectionName]();
        }
    }

    executeScripts(container) {
        container.querySelectorAll('script').forEach(script => {
            const newScript = document.createElement('script');
            if (script.src) {
                newScript.src = script.src;
            } else {
                newScript.textContent = script.textContent;
            }
            document.body.appendChild(newScript);
            script.remove();
        });
    }

    setupNavigation() {
        document.querySelectorAll('.sidebar-link[data-section]').forEach(link => {
            link.addEventListener('click', (e) => {
                e.preventDefault();
                const section = link.dataset.section;
                this.navigateTo(section);
            });
        });
    }

    setupTopbar() {
        // Sidebar toggle
        const toggle = document.getElementById('sidebarToggle');
        if (toggle) {
            toggle.addEventListener('click', () => {
                document.getElementById('sidebar')?.classList.toggle('collapsed');
            });
        }

        // Language switcher
        document.querySelectorAll('.lang-btn').forEach(btn => {
            btn.addEventListener('click', () => {
                document.querySelectorAll('.lang-btn').forEach(b => b.classList.remove('active'));
                btn.classList.add('active');
                const lang = btn.dataset.lang;
                this.changeLanguage(lang);
            });
        });

        // Update user info
        this.updateUserInfo();
    }

    navigateTo(section) {
        // Update nav
        document.querySelectorAll('.sidebar-link').forEach(link => {
            link.classList.remove('active');
        });
        document.querySelector(`.sidebar-link[data-section="${section}"]`)?.classList.add('active');

        // Update hash
        window.location.hash = section;

        // Load section
        this.currentSection = section;
        this.loadSection(section);
    }

    updatePageTitle(section) {
        const titles = {
            'dashboard': 'Dashboard',
            'properties': 'Propiedades',
            'leads': 'Leads',
            'testimonials': 'Testimonios',
            'faq': 'FAQ',
            'services': 'Servicios',
            'settings': 'Configuración'
        };

        const titleEl = document.getElementById('pageTitle');
        if (titleEl) {
            titleEl.textContent = titles[section] || section;
        }
    }

    updateUserInfo() {
        if (!this.currentUser) return;

        const userName = this.currentUser.name || 'Admin';
        const userAvatar = userName.charAt(0).toUpperCase();

        // Sidebar
        document.getElementById('sidebarUserName').textContent = userName;
        document.getElementById('sidebarUserRole').textContent = this.getRoleName(this.currentUser.role);
        document.getElementById('sidebarAvatar').textContent = userAvatar;

        // Topbar
        document.getElementById('topbarUserName').textContent = userName;
        document.getElementById('topbarUserRole').textContent = this.getRoleName(this.currentUser.role);
        document.getElementById('topbarAvatar').src = `https://ui-avatars.com/api/?name=${encodeURIComponent(userName)}&background=1a5f4a&color=fff`;
    }

    getRoleName(role) {
        const roles = {
            admin: 'Administrador',
            agent: 'Agente',
            editor: 'Editor'
        };
        return roles[role] || role;
    }

    changeLanguage(lang) {
        // TODO: Implement i18n
        console.log('Language changed to:', lang);
    }
}

// Initialize app
const app = new AdminApp();
document.addEventListener('DOMContentLoaded', () => app.init());

// Handle hash navigation
window.addEventListener('hashchange', () => {
    const section = window.location.hash.substring(1);
    if (section) app.navigateTo(section);
});

// Logout function
function logout() {
    API.logout().then(() => {
        localStorage.removeItem('user');
        window.location.href = '/login';
    }).catch(() => {
        window.location.href = '/login';
    });
}