/**
 * Mobile Mail App - Optimized for mobile devices
 * Progressive Web App with offline support
 */
header('Cache-Control: no-cache, no-store, must-revalidate');

$page_title = "Mail App - IT Live";
$pageDescription = "Mobile-optimized mail application";
$themeColor = "#6366f1";
?>

<div class="mobile-mail-app">
    <!-- Mobile Header -->
    <header class="mobile-header">
        <div class="header-top">
            <div class="app-title">
                <span class="app-icon">📧</span>
                <h1>Mail</h1>
            </div>
            <div class="header-actions">
                <button onclick="showCompose()" class="compose-btn">
                    <span>✉️</span>
                </button>
                <button onclick="toggleMenu()" class="menu-btn">
                    <span>☰</span>
                </button>
            </div>
        </div>
        
        <!-- Search Bar -->
        <div class="search-container">
            <input type="search" placeholder="Zoek e-mails..." id="search-input" onkeyup="searchEmails(this.value)">
            <button onclick="performSearch()" class="search-btn">🔍</button>
        </div>
    </header>

    <!-- Navigation Menu -->
    <nav class="nav-menu" id="nav-menu">
        <div class="nav-item active" onclick="switchFolder('inbox')">
            <span class="nav-icon">📥</span>
            <span class="nav-label">Inbox</span>
            <span class="nav-count" id="inbox-count">23</span>
        </div>
        <div class="nav-item" onclick="switchFolder('sent')">
            <span class="nav-icon">📤</span>
            <span class="nav-label">Sent</span>
        </div>
        <div class="nav-item" onclick="switchFolder('drafts')">
            <span class="nav-icon">📝</span>
            <span class="nav-label">Drafts</span>
        </div>
        <div class="nav-item" onclick="switchFolder('spam')">
            <span class="nav-icon">🛡️</span>
            <span class="nav-label">Spam</span>
        </div>
        <div class="nav-item" onclick="switchFolder('trash')">
            <span class="nav-icon">🗑️</span>
            <span class="nav-label">Trash</span>
        </div>
    </nav>

    <!-- Main Content -->
    <main class="mail-content">
        <!-- Email List -->
        <div class="email-list" id="email-list">
            <!-- Emails will be loaded here -->
        </div>

        <!-- Email Detail View -->
        <div class="email-detail" id="email-detail" style="display: none;">
            <div class="detail-header">
                <button onclick="backToList()" class="back-btn">← Back</button>
                <div class="detail-actions">
                    <button onclick="replyEmail()">↩️</button>
                    <button onclick="forwardEmail()">↪️</button>
                    <button onclick="deleteEmail()">🗑️</button>
                </div>
            </div>
            <div class="detail-content" id="detail-content">
                <!-- Email content will be loaded here -->
            </div>
        </div>

        <!-- Compose View -->
        <div class="compose-view" id="compose-view" style="display: none;">
            <div class="compose-header">
                <button onclick="closeCompose()" class="close-btn">×</button>
                <h3>Nieuwe e-mail</h3>
                <button onclick="sendEmail()" class="send-btn">Verzenden</button>
            </div>
            <div class="compose-form">
                <div class="form-group">
                    <input type="email" placeholder="Aan..." id="compose-to">
                </div>
                <div class="form-group">
                    <input type="text" placeholder="Onderwerp..." id="compose-subject">
                </div>
                <div class="form-group">
                    <textarea placeholder="Bericht..." id="compose-message"></textarea>
                </div>
                <div class="compose-actions">
                    <button onclick="attachFile()">📎 Bijlage</button>
                    <button onclick="saveDraft()">💾 Concept</button>
                </div>
            </div>
        </div>
    </main>

    <!-- Bottom Navigation -->
    <nav class="bottom-nav">
        <button class="nav-btn active" onclick="switchView('inbox')">
            <span class="nav-icon">📥</span>
            <span class="nav-label">Inbox</span>
        </button>
        <button class="nav-btn" onclick="showCompose()">
            <span class="nav-icon">✉️</span>
            <span class="nav-label">Compose</span>
        </button>
        <button class="nav-btn" onclick="switchView('settings')">
            <span class="nav-icon">⚙️</span>
            <span class="nav-label">Settings</span>
        </button>
        <button class="nav-btn" onclick="switchView('profile')">
            <span class="nav-icon">👤</span>
            <span class="nav-label">Profile</span>
        </button>
    </nav>

    <!-- Loading Indicator -->
    <div class="loading" id="loading" style="display: none;">
        <div class="spinner"></div>
        <p>Loading...</p>
    </div>

    <!-- Toast Notifications -->
    <div class="toast-container" id="toast-container"></div>
</div>

<style>
/* Mobile Mail App Styles */
.mobile-mail-app {
    min-height: 100vh;
    background: #f8fafc;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    padding-bottom: 60px; /* Space for bottom nav */
}

/* Header */
.mobile-header {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.app-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.app-title h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.app-icon {
    font-size: 1.5rem;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

.compose-btn, .menu-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 8px;
    padding: 0.5rem;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: background 0.3s ease;
}

.compose-btn:hover, .menu-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Search */
.search-container {
    display: flex;
    gap: 0.5rem;
}

.search-container input {
    flex: 1;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    padding: 0.75rem;
    color: white;
    font-size: 1rem;
}

.search-container input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.search-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 8px;
    padding: 0.75rem;
    color: white;
    cursor: pointer;
}

/* Navigation Menu */
.nav-menu {
    background: white;
    border-bottom: 1px solid #e5e7eb;
    padding: 0.5rem 0;
    display: flex;
    overflow-x: auto;
    scrollbar-width: none;
}

.nav-menu::-webkit-scrollbar {
    display: none;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: background 0.3s ease;
    min-width: 80px;
    position: relative;
}

.nav-item:hover {
    background: #f3f4f6;
}

.nav-item.active {
    color: #6366f1;
}

.nav-item.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 3px;
    background: #6366f1;
    border-radius: 2px;
}

.nav-icon {
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.nav-label {
    font-size: 0.75rem;
    font-weight: 500;
}

.nav-count {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: #ef4444;
    color: white;
    font-size: 0.625rem;
    padding: 0.125rem 0.375rem;
    border-radius: 10px;
    font-weight: 600;
}

/* Main Content */
.mail-content {
    background: white;
    min-height: calc(100vh - 200px);
}

/* Email List */
.email-list {
    padding: 0.5rem;
}

.email-item {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.email-item:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transform: translateY(-1px);
}

.email-item.unread {
    border-left: 4px solid #6366f1;
    background: #f8faff;
}

.email-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.email-from {
    font-weight: 600;
    color: #1f2937;
}

.email-time {
    font-size: 0.75rem;
    color: #6b7280;
}

.email-subject {
    font-weight: 500;
    color: #374151;
    margin-bottom: 0.25rem;
}

.email-preview {
    font-size: 0.875rem;
    color: #6b7280;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.email-meta {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.email-meta span {
    font-size: 0.75rem;
    color: #9ca3af;
}

/* Email Detail */
.email-detail {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: white;
    z-index: 200;
    overflow-y: auto;
}

.detail-header {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
}

.back-btn, .detail-actions button {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 8px;
    padding: 0.5rem;
    color: white;
    cursor: pointer;
}

.detail-actions {
    display: flex;
    gap: 0.5rem;
}

.detail-content {
    padding: 1.5rem;
}

.detail-from, .detail-subject {
    margin-bottom: 1rem;
}

.detail-from {
    font-weight: 600;
    color: #1f2937;
}

.detail-subject {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1f2937;
}

.detail-body {
    line-height: 1.6;
    color: #374151;
}

/* Compose View */
.compose-view {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 80vh;
    background: white;
    border-radius: 20px 20px 0 0;
    z-index: 300;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
}

.compose-header {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 20px 20px 0 0;
}

.close-btn {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

.send-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 8px;
    padding: 0.5rem 1rem;
    color: white;
    cursor: pointer;
}

.compose-form {
    padding: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group input, .form-group textarea {
    width: 100%;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 0.75rem;
    font-size: 1rem;
}

.form-group textarea {
    min-height: 200px;
    resize: vertical;
}

.compose-actions {
    display: flex;
    gap: 0.5rem;
}

.compose-actions button {
    background: #f3f4f6;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 0.5rem 1rem;
    cursor: pointer;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: white;
    border-top: 1px solid #e5e7eb;
    display: flex;
    justify-content: space-around;
    padding: 0.5rem 0;
    z-index: 100;
}

.nav-btn {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    transition: color 0.3s ease;
}

.nav-btn.active {
    color: #6366f1;
}

.nav-btn .nav-icon {
    font-size: 1.2rem;
}

.nav-btn .nav-label {
    font-size: 0.625rem;
    font-weight: 500;
}

/* Loading */
.loading {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 400;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f4f6;
    border-top: 4px solid #6366f1;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 500;
}

.toast {
    background: #1f2937;
    color: white;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    animation: slideIn 0.3s ease;
}

.toast.success {
    background: #10b981;
}

.toast.error {
    background: #ef4444;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive */
@media (min-width: 768px) {
    .mobile-mail-app {
        max-width: 768px;
        margin: 0 auto;
        box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    }
    
    .compose-view {
        width: 90%;
        left: 5%;
        height: 70vh;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .mobile-mail-app {
        background: #1f2937;
    }
    
    .mail-content {
        background: #111827;
    }
    
    .email-item {
        background: #1f2937;
        border-color: #374151;
    }
    
    .email-from {
        color: #f9fafb;
    }
    
    .email-subject {
        color: #f3f4f6;
    }
    
    .email-preview {
        color: #9ca3af;
    }
    
    .nav-menu {
        background: #1f2937;
        border-color: #374151;
    }
    
    .bottom-nav {
        background: #1f2937;
        border-color: #374151;
    }
}
</style>

<script>
// Mobile Mail App JavaScript
let currentFolder = 'inbox';
let currentEmail = null;
let emails = [];

// Initialize app
document.addEventListener('DOMContentLoaded', function() {
    loadEmails();
    updateUnreadCount();
    
    // Register service worker for PWA
    if ('serviceWorker' in navigator) {
        navigator.serviceWorker.register('/sw.js').catch(console.error);
    }
});

// Load emails
function loadEmails() {
    showLoading();
    
    // Simulate API call
    setTimeout(() => {
        emails = generateMockEmails();
        renderEmailList();
        hideLoading();
    }, 1000);
}

// Generate mock emails
function generateMockEmails() {
    const subjects = [
        'Website aanvraag ontvangen', 'Nieuwe klantregistratie', 'Factuur #2024-001',
        'Server maintenance notification', 'Backup voltooid', 'Security alert',
        'Newsletter subscription', 'Project update', 'Meeting request'
    ];
    
    const senders = [
        'info@klant.nl', 'user@gmail.com', 'support@provider.com',
        'admin@bedrijf.nl', 'webmaster@site.nl', 'contact@company.nl'
    ];
    
    const mockEmails = [];
    for (let i = 0; i < 20; i++) {
        mockEmails.push({
            id: 'email_' + i,
            from: senders[Math.floor(Math.random() * senders.length)],
            subject: subjects[Math.floor(Math.random() * subjects.length)],
            preview: 'Dit is een preview van de e-mail inhoud...',
            time: Math.floor(Math.random() * 24) + ' uur geleden',
            unread: Math.random() > 0.7,
            hasAttachment: Math.random() > 0.8,
            folder: currentFolder
        });
    }
    
    return mockEmails;
}

// Render email list
function renderEmailList() {
    const emailList = document.getElementById('email-list');
    const folderEmails = emails.filter(email => email.folder === currentFolder);
    
    emailList.innerHTML = folderEmails.map(email => `
        <div class="email-item ${email.unread ? 'unread' : ''}" onclick="openEmail('${email.id}')">
            <div class="email-header">
                <div class="email-from">${email.from}</div>
                <div class="email-time">${email.time}</div>
            </div>
            <div class="email-subject">${email.subject}</div>
            <div class="email-preview">${email.preview}</div>
            <div class="email-meta">
                ${email.hasAttachment ? '<span>📎</span>' : ''}
                ${email.unread ? '<span>🔵</span>' : ''}
            </div>
        </div>
    `).join('');
}

// Open email detail
function openEmail(emailId) {
    currentEmail = emails.find(email => email.id === emailId);
    if (!currentEmail) return;
    
    // Mark as read
    currentEmail.unread = false;
    updateUnreadCount();
    
    // Show detail view
    const detailView = document.getElementById('email-detail');
    const detailContent = document.getElementById('detail-content');
    
    detailContent.innerHTML = `
        <div class="detail-from">Van: ${currentEmail.from}</div>
        <div class="detail-subject">${currentEmail.subject}</div>
        <div class="detail-body">
            <p>Beste,</p>
            <p>${currentEmail.preview}</p>
            <p>Dit is de volledige inhoud van de e-mail. In een echte applicatie zou hier de complete e-mail tekst staan.</p>
            <p>Met vriendelijke groet,<br>${currentEmail.from}</p>
        </div>
    `;
    
    detailView.style.display = 'block';
}

// Back to email list
function backToList() {
    document.getElementById('email-detail').style.display = 'none';
    renderEmailList(); // Refresh to show read status
}

// Compose functions
function showCompose() {
    document.getElementById('compose-view').style.display = 'block';
}

function closeCompose() {
    document.getElementById('compose-view').style.display = 'none';
}

function sendEmail() {
    const to = document.getElementById('compose-to').value;
    const subject = document.getElementById('compose-subject').value;
    const message = document.getElementById('compose-message').value;
    
    if (!to || !subject || !message) {
        showToast('Vul alle velden in', 'error');
        return;
    }
    
    showLoading();
    
    // Simulate sending
    setTimeout(() => {
        hideLoading();
        closeCompose();
        showToast('E-mail verzonden', 'success');
        
        // Clear form
        document.getElementById('compose-to').value = '';
        document.getElementById('compose-subject').value = '';
        document.getElementById('compose-message').value = '';
    }, 1500);
}

// Reply/Forward/Delete functions
function replyEmail() {
    if (!currentEmail) return;
    showCompose();
    document.getElementById('compose-to').value = currentEmail.from;
    document.getElementById('compose-subject').value = 'Re: ' + currentEmail.subject;
}

function forwardEmail() {
    if (!currentEmail) return;
    showCompose();
    document.getElementById('compose-subject').value = 'Fwd: ' + currentEmail.subject;
    document.getElementById('compose-message').value = '\n\n--- Forwarded message ---\nFrom: ' + currentEmail.from + '\nSubject: ' + currentEmail.subject;
}

function deleteEmail() {
    if (!currentEmail) return;
    
    if (confirm('E-mail verwijderen?')) {
        emails = emails.filter(email => email.id !== currentEmail.id);
        backToList();
        showToast('E-mail verwijderd', 'success');
    }
}

// Search functions
function searchEmails(query) {
    if (!query) {
        renderEmailList();
        return;
    }
    
    const filtered = emails.filter(email => 
        email.subject.toLowerCase().includes(query.toLowerCase()) ||
        email.from.toLowerCase().includes(query.toLowerCase())
    );
    
    const emailList = document.getElementById('email-list');
    emailList.innerHTML = filtered.map(email => `
        <div class="email-item ${email.unread ? 'unread' : ''}" onclick="openEmail('${email.id}')">
            <div class="email-header">
                <div class="email-from">${email.from}</div>
                <div class="email-time">${email.time}</div>
            </div>
            <div class="email-subject">${email.subject}</div>
            <div class="email-preview">${email.preview}</div>
        </div>
    `).join('');
}

function performSearch() {
    const query = document.getElementById('search-input').value;
    searchEmails(query);
}

// Navigation functions
function switchFolder(folder) {
    currentFolder = folder;
    
    // Update active state
    document.querySelectorAll('.nav-item').forEach(item => {
        item.classList.remove('active');
    });
    event.target.closest('.nav-item').classList.add('active');
    
    // Load emails for folder
    loadEmails();
}

function switchView(view) {
    // Update bottom nav active state
    document.querySelectorAll('.nav-btn').forEach(btn => {
        btn.classList.remove('active');
    });
    event.target.closest('.nav-btn').classList.add('active');
    
    // Handle view switching
    switch (view) {
        case 'inbox':
            currentFolder = 'inbox';
            loadEmails();
            break;
        case 'settings':
            showToast('Settings coming soon', 'info');
            break;
        case 'profile':
            showToast('Profile coming soon', 'info');
            break;
    }
}

function toggleMenu() {
    const navMenu = document.getElementById('nav-menu');
    navMenu.style.display = navMenu.style.display === 'none' ? 'flex' : 'none';
}

// Utility functions
function updateUnreadCount() {
    const unreadCount = emails.filter(email => email.unread && email.folder === 'inbox').length;
    document.getElementById('inbox-count').textContent = unreadCount;
}

function showLoading() {
    document.getElementById('loading').style.display = 'block';
}

function hideLoading() {
    document.getElementById('loading').style.display = 'none';
}

function showToast(message, type = 'info') {
    const container = document.getElementById('toast-container');
    const toast = document.createElement('div');
    toast.className = `toast ${type}`;
    toast.textContent = message;
    
    container.appendChild(toast);
    
    setTimeout(() => {
        toast.remove();
    }, 3000);
}

// Attach file (placeholder)
function attachFile() {
    showToast('File attachment coming soon', 'info');
}

// Save draft (placeholder)
function saveDraft() {
    showToast('Draft saved', 'success');
}

// Pull-to-refresh functionality
let startY = 0;
let isPulling = false;

document.addEventListener('touchstart', (e) => {
    if (window.scrollY === 0) {
        startY = e.touches[0].clientY;
        isPulling = true;
    }
});

document.addEventListener('touchmove', (e) => {
    if (!isPulling) return;
    
    const currentY = e.touches[0].clientY;
    const pullDistance = currentY - startY;
    
    if (pullDistance > 100) {
        document.body.style.transform = `translateY(${Math.min(pullDistance * 0.3, 50)}px)`;
    }
});

document.addEventListener('touchend', () => {
    if (!isPulling) return;
    
    const currentY = event.changedTouches[0].clientY;
    const pullDistance = currentY - startY;
    
    if (pullDistance > 150) {
        loadEmails();
        showToast('Refreshing...', 'info');
    }
    
    document.body.style.transform = '';
    isPulling = false;
});
</script>

</body>
</html>