/**
 * Navegación entre secciones SCORM
 */

(function() {
    'use strict';
    
    const sections = [
        'section-01.html',
        'section-02.html',
        'section-03.html',
        'section-04.html',
        'section-05.html',
        'section-06.html',
        'section-07.html',
        'section-08.html'
    ];
    
    let currentSection = 1;
    const totalSections = sections.length;
    
    // Obtener sección actual desde SCORM o URL
    function getCurrentSection() {
        if (window.SCORM && window.SCORM.isInitialized) {
            const location = window.SCORM.getValue("cmi.core.lesson_location");
            if (location) {
                return parseInt(location, 10) || 1;
            }
        }
        
        // Intentar desde URL
        const urlParams = new URLSearchParams(window.location.search);
        const section = urlParams.get('section');
        if (section) {
            return parseInt(section, 10) || 1;
        }
        
        return 1;
    }
    
    // Cargar sección
    function loadSection(sectionNumber) {
        if (sectionNumber < 1 || sectionNumber > totalSections) {
            return;
        }
        
        currentSection = sectionNumber;
        const sectionFile = sections[sectionNumber - 1];
        
        // Cargar contenido
        fetch(`sections/${sectionFile}`)
            .then(response => response.text())
            .then(html => {
                document.getElementById('content').innerHTML = html;
                updateUI();
                updateSCORM();
            })
            .catch(error => {
                console.error('Error cargando sección:', error);
                document.getElementById('content').innerHTML = 
                    '<p>Error al cargar la sección. Por favor, recarga la página.</p>';
            });
    }
    
    // Actualizar UI
    function updateUI() {
        // Actualizar indicador de sección
        document.getElementById('current-section').textContent = currentSection;
        document.getElementById('total-sections').textContent = totalSections;
        
        // Actualizar barra de progreso
        const progress = (currentSection / totalSections) * 100;
        document.getElementById('progress-fill').style.width = progress + '%';
        
        // Actualizar botones
        document.getElementById('btn-prev').disabled = currentSection === 1;
        document.getElementById('btn-next').disabled = currentSection === totalSections;
    }
    
    // Actualizar SCORM
    function updateSCORM() {
        if (window.SCORM) {
            window.SCORM.updateProgress(currentSection, totalSections);
        }
    }
    
    // Event listeners
    document.getElementById('btn-prev').addEventListener('click', () => {
        if (currentSection > 1) {
            loadSection(currentSection - 1);
        }
    });
    
    document.getElementById('btn-next').addEventListener('click', () => {
        if (currentSection < totalSections) {
            loadSection(currentSection + 1);
        } else {
            // Completar curso
            if (window.SCORM) {
                window.SCORM.setCompleted();
            }
            alert('¡Has completado la guía!');
        }
    });
    
    document.getElementById('btn-exit').addEventListener('click', () => {
        if (window.SCORM) {
            window.SCORM.terminate();
        }
        // Cerrar ventana o redirigir
        if (window.opener) {
            window.close();
        } else {
            window.location.href = '/';
        }
    });
    
    // Inicializar
    currentSection = getCurrentSection();
    loadSection(currentSection);
    
})();