/**
 * Sales Bot - PWA Registration and Install Prompt
 */

// Register Service Worker
if ('serviceWorker' in navigator) {
    window.addEventListener('load', async () => {
        try {
            const registration = await navigator.serviceWorker.register('/service-worker.js');
            console.log('Service Worker registered:', registration.scope);

            // Check for updates
            registration.addEventListener('updatefound', () => {
                const newWorker = registration.installing;
                newWorker.addEventListener('statechange', () => {
                    if (newWorker.state === 'installed' && navigator.serviceWorker.controller) {
                        // New version available
                        showUpdatePrompt();
                    }
                });
            });
        } catch (error) {
            console.error('Service Worker registration failed:', error);
        }
    });
}

// Install prompt handling
let deferredPrompt;

window.addEventListener('beforeinstallprompt', (e) => {
    e.preventDefault();
    deferredPrompt = e;
    showInstallPrompt();
});

function showInstallPrompt() {
    // Create install prompt UI
    const prompt = document.createElement('div');
    prompt.id = 'install-prompt';
    prompt.className = 'install-prompt show';
    prompt.innerHTML = `
        <span>Instalar Sales Bot en tu dispositivo</span>
        <button class="btn btn-primary" onclick="installPWA()">Instalar</button>
        <button class="btn btn-secondary" onclick="dismissInstallPrompt()">Ahora no</button>
    `;
    document.body.appendChild(prompt);
}

async function installPWA() {
    if (!deferredPrompt) return;

    deferredPrompt.prompt();
    const { outcome } = await deferredPrompt.userChoice;

    console.log('Install prompt outcome:', outcome);
    deferredPrompt = null;
    dismissInstallPrompt();

    if (outcome === 'accepted') {
        if (window.Utils) {
            window.Utils.showNotification('App instalada correctamente', 'success');
        }
    }
}

function dismissInstallPrompt() {
    const prompt = document.getElementById('install-prompt');
    if (prompt) {
        prompt.remove();
    }
}

function showUpdatePrompt() {
    const updateBanner = document.createElement('div');
    updateBanner.id = 'update-banner';
    updateBanner.style.cssText = `
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: #00d4ff;
        color: #000;
        padding: 15px;
        text-align: center;
        z-index: 9999;
    `;
    updateBanner.innerHTML = `
        <span>Nueva version disponible</span>
        <button onclick="updateApp()" style="margin-left: 15px; padding: 5px 15px; border: none; border-radius: 4px; cursor: pointer;">
            Actualizar
        </button>
    `;
    document.body.appendChild(updateBanner);
}

function updateApp() {
    if ('serviceWorker' in navigator) {
        navigator.serviceWorker.getRegistration().then(registration => {
            if (registration && registration.waiting) {
                registration.waiting.postMessage({ type: 'SKIP_WAITING' });
            }
        });
    }
    window.location.reload();
}

// Detect if running as PWA
function isPWA() {
    return window.matchMedia('(display-mode: standalone)').matches ||
           window.navigator.standalone === true;
}

// Add PWA class to body if running as installed app
if (isPWA()) {
    document.body.classList.add('pwa-mode');
}

// Export
window.installPWA = installPWA;
window.dismissInstallPrompt = dismissInstallPrompt;
window.isPWA = isPWA;