// BotKonzept Website - Main JavaScript
// =====================================

// Configuration
const CONFIG = {
    // n8n Webhook URL für Registrierung (wird später konfiguriert)
    WEBHOOK_URL: 'https://n8n.userman.de/webhook/botkonzept-registration',
    // Supabase URL (lokale Instanz)
    SUPABASE_URL: 'http://192.168.45.3:3000',
    SUPABASE_ANON_KEY: 'your-anon-key-here'
};

// =====================================
// Mobile Menu Toggle
// =====================================
document.addEventListener('DOMContentLoaded', function() {
    const mobileMenuToggle = document.querySelector('.mobile-menu-toggle');
    const navMenu = document.querySelector('.nav-menu');
    
    if (mobileMenuToggle) {
        mobileMenuToggle.addEventListener('click', function() {
            navMenu.classList.toggle('active');
            this.classList.toggle('active');
        });
    }
    
    // Close mobile menu when clicking on a link
    const navLinks = document.querySelectorAll('.nav-menu a');
    navLinks.forEach(link => {
        link.addEventListener('click', function() {
            navMenu.classList.remove('active');
            mobileMenuToggle.classList.remove('active');
        });
    });
});

// =====================================
// Smooth Scroll for Anchor Links
// =====================================
document.querySelectorAll('a[href^="#"]').forEach(anchor => {
    anchor.addEventListener('click', function (e) {
        e.preventDefault();
        const target = document.querySelector(this.getAttribute('href'));
        if (target) {
            const offset = 80; // Navbar height
            const targetPosition = target.offsetTop - offset;
            window.scrollTo({
                top: targetPosition,
                behavior: 'smooth'
            });
        }
    });
});

// =====================================
// Trial Registration Form
// =====================================
const trialForm = document.getElementById('trialForm');
const successMessage = document.getElementById('successMessage');

if (trialForm) {
    trialForm.addEventListener('submit', async function(e) {
        e.preventDefault();
        
        // Get form data
        const formData = {
            firstName: document.getElementById('firstName').value.trim(),
            lastName: document.getElementById('lastName').value.trim(),
            email: document.getElementById('email').value.trim().toLowerCase(),
            company: document.getElementById('company').value.trim() || null,
            terms: document.getElementById('terms').checked,
            registeredAt: new Date().toISOString(),
            source: 'website',
            utmSource: getUrlParameter('utm_source') || null,
            utmMedium: getUrlParameter('utm_medium') || null,
            utmCampaign: getUrlParameter('utm_campaign') || null
        };
        
        // Validate
        if (!formData.firstName || !formData.lastName || !formData.email) {
            showError('Bitte füllen Sie alle Pflichtfelder aus.');
            return;
        }
        
        if (!validateEmail(formData.email)) {
            showError('Bitte geben Sie eine gültige E-Mail-Adresse ein.');
            return;
        }
        
        if (!formData.terms) {
            showError('Bitte akzeptieren Sie die AGB und Datenschutzerklärung.');
            return;
        }
        
        // Show loading state
        const submitButton = trialForm.querySelector('button[type="submit"]');
        const btnText = submitButton.querySelector('.btn-text');
        const btnLoading = submitButton.querySelector('.btn-loading');
        
        submitButton.disabled = true;
        btnText.style.display = 'none';
        btnLoading.style.display = 'flex';
        
        try {
            // Send to n8n webhook
            const response = await fetch(CONFIG.WEBHOOK_URL, {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                },
                body: JSON.stringify(formData)
            });
            
            if (!response.ok) {
                throw new Error('Registrierung fehlgeschlagen');
            }
            
            const result = await response.json();
            
            // Show success message
            trialForm.style.display = 'none';
            successMessage.style.display = 'block';
            
            // Track conversion (Google Analytics, Facebook Pixel, etc.)
            trackConversion('trial_registration', formData);
            
            // Scroll to success message
            successMessage.scrollIntoView({ behavior: 'smooth', block: 'center' });
            
        } catch (error) {
            console.error('Registration error:', error);
            showError('Ein Fehler ist aufgetreten. Bitte versuchen Sie es später erneut oder kontaktieren Sie uns direkt.');
            
            // Reset button state
            submitButton.disabled = false;
            btnText.style.display = 'inline';
            btnLoading.style.display = 'none';
        }
    });
}

// =====================================
// Helper Functions
// =====================================

function validateEmail(email) {
    const re = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    return re.test(email);
}

function showError(message) {
    // Create or update error message
    let errorDiv = document.querySelector('.form-error');
    
    if (!errorDiv) {
        errorDiv = document.createElement('div');
        errorDiv.className = 'form-error';
        errorDiv.style.cssText = `
            background: #fee2e2;
            border: 1px solid #ef4444;
            color: #991b1b;
            padding: 1rem;
            border-radius: 0.5rem;
            margin-bottom: 1rem;
            font-size: 0.95rem;
        `;
        trialForm.insertBefore(errorDiv, trialForm.firstChild);
    }
    
    errorDiv.textContent = message;
    errorDiv.scrollIntoView({ behavior: 'smooth', block: 'center' });
    
    // Remove after 5 seconds
    setTimeout(() => {
        errorDiv.remove();
    }, 5000);
}

function getUrlParameter(name) {
    const urlParams = new URLSearchParams(window.location.search);
    return urlParams.get(name);
}

function trackConversion(eventName, data) {
    // Google Analytics
    if (typeof gtag !== 'undefined') {
        gtag('event', eventName, {
            'event_category': 'registration',
            'event_label': 'trial',
            'value': 0
        });
    }
    
    // Facebook Pixel
    if (typeof fbq !== 'undefined') {
        fbq('track', 'Lead', {
            content_name: 'Trial Registration',
            content_category: 'Registration'
        });
    }
    
    // Custom tracking
    console.log('Conversion tracked:', eventName, data);
}

// =====================================
// Scroll Animations
// =====================================
const observerOptions = {
    threshold: 0.1,
    rootMargin: '0px 0px -50px 0px'
};

const observer = new IntersectionObserver(function(entries) {
    entries.forEach(entry => {
        if (entry.isIntersecting) {
            entry.target.classList.add('animate-in');
            observer.unobserve(entry.target);
        }
    });
}, observerOptions);

// Observe elements for animation
document.addEventListener('DOMContentLoaded', function() {
    const animateElements = document.querySelectorAll('.feature-card, .step, .pricing-card, .faq-item');
    animateElements.forEach(el => {
        el.style.opacity = '0';
        el.style.transform = 'translateY(20px)';
        el.style.transition = 'opacity 0.6s ease, transform 0.6s ease';
        observer.observe(el);
    });
});

// Add CSS for animation
const style = document.createElement('style');
style.textContent = `
    .animate-in {
        opacity: 1 !important;
        transform: translateY(0) !important;
    }
`;
document.head.appendChild(style);

// =====================================
// Pricing Calculator (Optional)
// =====================================
function calculatePricing(plan, discount = 0) {
    const prices = {
        trial: 0,
        starter: 49,
        business: 149
    };
    
    const basePrice = prices[plan] || 0;
    const discountedPrice = basePrice * (1 - discount / 100);
    
    return {
        basePrice,
        discount,
        discountedPrice,
        savings: basePrice - discountedPrice
    };
}

// =====================================
// FAQ Accordion (Optional Enhancement)
// =====================================
document.querySelectorAll('.faq-item').forEach(item => {
    item.addEventListener('click', function() {
        this.classList.toggle('active');
    });
});

// =====================================
// Newsletter Subscription (Optional)
// =====================================
function subscribeNewsletter(email) {
    // Integration mit Sendy.co
    const sendyUrl = 'https://sendy.userman.de/subscribe';
    
    const formData = new FormData();
    formData.append('email', email);
    formData.append('list', 'your-list-id');
    formData.append('boolean', 'true');
    
    return fetch(sendyUrl, {
        method: 'POST',
        body: formData
    });
}

// =====================================
// Live Chat Widget Integration (Optional)
// =====================================
function initializeChatWidget() {
    // Hier kann später der eigene BotKonzept-Chatbot integriert werden
    console.log('Chat widget initialized');
}

// =====================================
// A/B Testing Helper (Optional)
// =====================================
function getABTestVariant() {
    const variants = ['A', 'B'];
    const stored = localStorage.getItem('ab_variant');
    
    if (stored) {
        return stored;
    }
    
    const variant = variants[Math.floor(Math.random() * variants.length)];
    localStorage.setItem('ab_variant', variant);
    return variant;
}

// =====================================
// Cookie Consent (DSGVO)
// =====================================
function showCookieConsent() {
    const consent = localStorage.getItem('cookie_consent');
    
    if (!consent) {
        const banner = document.createElement('div');
        banner.className = 'cookie-banner';
        banner.innerHTML = `
            <div class="cookie-content">
                <p>Wir verwenden Cookies, um Ihre Erfahrung zu verbessern. 
                <a href="privacy.html">Mehr erfahren</a></p>
                <button onclick="acceptCookies()" class="btn-primary">Akzeptieren</button>
            </div>
        `;
        banner.style.cssText = `
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: #1f2937;
            color: white;
            padding: 1.5rem;
            z-index: 9999;
            box-shadow: 0 -4px 6px rgba(0,0,0,0.1);
        `;
        document.body.appendChild(banner);
    }
}

function acceptCookies() {
    localStorage.setItem('cookie_consent', 'true');
    document.querySelector('.cookie-banner').remove();
}

// Show cookie consent on page load
document.addEventListener('DOMContentLoaded', showCookieConsent);

// =====================================
// Performance Monitoring
// =====================================
if ('PerformanceObserver' in window) {
    const observer = new PerformanceObserver((list) => {
        for (const entry of list.getEntries()) {
            console.log('Performance:', entry.name, entry.duration);
        }
    });
    observer.observe({ entryTypes: ['measure', 'navigation'] });
}

// =====================================
// Error Tracking
// =====================================
window.addEventListener('error', function(e) {
    console.error('Global error:', e.error);
    // Hier könnte Sentry oder ähnliches integriert werden
});

window.addEventListener('unhandledrejection', function(e) {
    console.error('Unhandled promise rejection:', e.reason);
});

// =====================================
// Export for testing
// =====================================
if (typeof module !== 'undefined' && module.exports) {
    module.exports = {
        validateEmail,
        calculatePricing,
        getUrlParameter
    };
}