// Potbi Landing Page JavaScript

document.addEventListener('DOMContentLoaded', function() {
    // Initialize Feather icons
    if (typeof feather !== 'undefined') {
        feather.replace();
    }

    // Demo tabs functionality
    initDemoTabs();

    // Counter animation
    initCounters();

    // Smooth scroll for anchor links
    initSmoothScroll();

    // Intersection Observer for animations
    initScrollAnimations();

    // Navbar scroll effect
    initNavbarScroll();
});

// Demo Tabs
function initDemoTabs() {
    const tabs = document.querySelectorAll('.demo-tab');
    const contents = document.querySelectorAll('.demo-content');

    tabs.forEach(tab => {
        tab.addEventListener('click', () => {
            const targetId = tab.dataset.tab;
            
            // Update tabs
            tabs.forEach(t => {
                t.classList.remove('active');
                t.classList.add('bg-slate-800/30', 'border-slate-800');
                t.classList.remove('bg-slate-800/50', 'border-slate-700');
            });
            tab.classList.add('active');
            tab.classList.remove('bg-slate-800/30', 'border-slate-800');
            tab.classList.add('bg-slate-800/50', 'border-slate-700');

            // Update contents
            contents.forEach(content => {
                content.classList.add('hidden');
                content.classList.remove('active');
            });
            
            const targetContent = document.getElementById(`demo-${targetId}`);
            if (targetContent) {
                targetContent.classList.remove('hidden');
                // Small delay to allow display:block to apply before opacity transition
                setTimeout(() => {
                    targetContent.classList.add('active');
                }, 10);
            }

            // Re-render icons
            if (typeof feather !== 'undefined') {
                feather.replace();
            }
        });
    });
}

// Counter Animation
function initCounters() {
    const counters = document.querySelectorAll('[data-count]');
    
    const observerOptions = {
        threshold: 0.5,
        rootMargin: '0px'
    };

    const observer = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                const counter = entry.target;
                const target = parseFloat(counter.dataset.count);
                const isDecimal = target % 1 !== 0;
                const duration = 2000;
                const startTime = performance.now();

                function updateCounter(currentTime) {
                    const elapsed = currentTime - startTime;
                    const progress = Math.min(elapsed / duration, 1);
                    
                    // Easing function
                    const easeOutQuart = 1 - Math.pow(1 - progress, 4);
                    const current = target * easeOutQuart;

                    if (isDecimal) {
                        counter.textContent = current.toFixed(1);
                    } else {
                        counter.textContent = Math.floor(current).toLocaleString();
                    }

                    if (progress < 1) {
                        requestAnimationFrame(updateCounter);
                    } else {
                        if (isDecimal) {
                            counter.textContent = target.toFixed(1);
                        } else {
                            counter.textContent = target.toLocaleString();
                        }
                    }
                }

                requestAnimationFrame(updateCounter);
                observer.unobserve(counter);
            }
        });
    }, observerOptions);

    counters.forEach(counter => observer.observe(counter));
}

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

// Scroll Animations
function initScrollAnimations() {
    const animatedElements = document.querySelectorAll('.animate-on-scroll');
    
    const observerOptions = {
        threshold: 0.1,
        rootMargin: '0px 0px -50px 0px'
    };

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

    animatedElements.forEach(el => observer.observe(el));
}

// Navbar Scroll Effect
function initNavbarScroll() {
    const navbar = document.querySelector('potbi-navbar');
    if (!navbar) return;

    let lastScroll = 0;
    let ticking = false;

    function updateNavbar() {
        const currentScroll = window.pageYOffset;
        
        if (currentScroll > 100) {
            navbar.classList.add('scrolled');
        } else {
            navbar.classList.remove('scrolled');
        }

        lastScroll = currentScroll;
        ticking = false;
    }

    window.addEventListener('scroll', () => {
        if (!ticking) {
            requestAnimationFrame(updateNavbar);
            ticking = true;
        }
    }, { passive: true });
}

// Utility: Debounce function
function debounce(func, wait) {
    let timeout;
    return function executedFunction(...args) {
        const later = () => {
            clearTimeout(timeout);
            func(...args);
        };
        clearTimeout(timeout);
        timeout = setTimeout(later, wait);
    };
}

// Utility: Throttle function
function throttle(func, limit) {
    let inThrottle;
    return function(...args) {
        if (!inThrottle) {
            func.apply(this, args);
            inThrottle = true;
            setTimeout(() => inThrottle = false, limit);
        }
    };
}

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

// Mobile menu toggle (for components)
function toggleMobileMenu() {
    const menu = document.getElementById('mobile-menu');
    if (menu) {
        menu.classList.toggle('hidden');
        menu.classList.toggle('mobile-menu-enter');
    }
}

// Export functions for global access
window.Potbi = {
    toggleMobileMenu,
    validateEmail,
    debounce,
    throttle
};