// Only run if we're on a page with the required elements
(function() {
    'use strict';

    // Mouse glow effect - only if element exists
    const mouseGlow = document.getElementById('mouseGlow');
    if (mouseGlow) {
        document.addEventListener('mousemove', (e) => {
            if (mouseGlow) {
                mouseGlow.style.left = e.clientX + 'px';
                mouseGlow.style.top = e.clientY + 'px';
            }
        });
    }

    // Text scramble effect - only initialize on pages with the element
    const scrambleEl = document.getElementById('scrambleText');
    if (scrambleEl && typeof scrambleEl.innerText === 'string') {
        class TextScramble {
            constructor(el) {
                if (!el) throw new Error('Element required');
                this.el = el;
                this.chars = '!<>-_\\/[]{}—=+*^?#________';
                this.update = this.update.bind(this);
                this.frame = 0;
                this.queue = [];
                this.frameRequest = null;
                this.resolve = null;
            }
            
            setText(newText) {
                if (!this.el || typeof newText !== 'string') return Promise.resolve();
                
                const oldText = this.el.innerText || '';
                const length = Math.max(oldText.length, newText.length);
                
                // Reset queue
                this.queue = [];
                
                for (let i = 0; i < length; i++) {
                    const from = oldText[i] || '';
                    const to = newText[i] || '';
                    const start = Math.floor(Math.random() * 40);
                    const end = start + Math.floor(Math.random() * 40);
                    this.queue.push({ from, to, start, end, char: '' });
                }
                
                if (this.frameRequest) {
                    cancelAnimationFrame(this.frameRequest);
                }
                
                this.frame = 0;
                
                return new Promise((resolve) => {
                    this.resolve = resolve;
                    this.update();
                });
            }
            
            update() {
                if (!this.el || !this.queue || !Array.isArray(this.queue)) return;
                
                let output = '';
                let complete = 0;
                
                for (let i = 0; i < this.queue.length; i++) {
                    const item = this.queue[i];
                    if (!item) continue;
                    
                    const from = item.from || '';
                    const to = item.to || '';
                    const start = item.start || 0;
                    const end = item.end || 0;
                    let char = item.char || '';
                    
                    if (this.frame >= end) {
                        complete++;
                        output += to;
                    } else if (this.frame >= start) {
                        if (!char || Math.random() < 0.28) {
                            char = this.randomChar() || '';
                            this.queue[i].char = char;
                        }
                        output += char;
                    } else {
                        output += from;
                    }
                }
                
                // Only set text if we have valid string content
                if (typeof output === 'string') {
                    this.el.innerText = output;
                }
                
                if (complete === this.queue.length) {
                    if (this.resolve) this.resolve();
                } else {
                    this.frameRequest = requestAnimationFrame(this.update);
                    this.frame++;
                }
            }
            
            randomChar() {
                if (!this.chars || this.chars.length === 0) return '';
                return this.chars[Math.floor(Math.random() * this.chars.length)];
            }
        }

        // Initialize scramble
        const phrases = ['FUTURE', 'INTELLIGENCE', 'POSSIBILITIES', 'EVOLUTION', 'TOMORROW'];
        let counter = 0;
        
        try {
            const fx = new TextScramble(scrambleEl);
            
            const next = () => {
                if (!fx.el) return;
                const nextPhrase = phrases[counter];
                if (typeof nextPhrase === 'string') {
                    fx.setText(nextPhrase).then(() => {
                        setTimeout(next, 3000);
                    });
                }
                counter = (counter + 1) % phrases.length;
            };
            
            setTimeout(next, 2000);
        } catch (e) {
            console.error('Scramble effect error:', e);
        }
    }

    // Mobile menu toggle - only if both elements exist
    const mobileMenuBtn = document.getElementById('mobileMenuBtn');
    const mobileMenu = document.getElementById('mobileMenu');

    if (mobileMenuBtn && mobileMenu) {
        mobileMenuBtn.addEventListener('click', () => {
            mobileMenu.classList.toggle('hidden');
        });
        
        // Close mobile menu when clicking links
        mobileMenu.querySelectorAll('a').forEach(link => {
            link.addEventListener('click', () => {
                mobileMenu.classList.add('hidden');
            });
        });
    }

    // Newsletter form handling
    const newsletterForm = document.getElementById('newsletterForm');
    const submitBtn = document.getElementById('submitBtn');

    if (newsletterForm && submitBtn) {
        newsletterForm.addEventListener('submit', (e) => {
            e.preventDefault();
            
            const originalContent = submitBtn.innerHTML;
            submitBtn.innerHTML = '<span class="animate-spin inline-block w-4 h-4 border-2 border-white border-t-transparent rounded-full mr-2"></span>Subscribing...';
            submitBtn.disabled = true;
            
            setTimeout(() => {
                submitBtn.innerHTML = '<i data-lucide="check" class="w-4 h-4 mr-2"></i>Subscribed!';
                submitBtn.classList.remove('btn-primary');
                submitBtn.classList.add('bg-green-500');
                
                if (typeof lucide !== 'undefined') {
                    lucide.createIcons();
                }
                
                setTimeout(() => {
                    submitBtn.innerHTML = originalContent;
                    submitBtn.classList.add('btn-primary');
                    submitBtn.classList.remove('bg-green-500');
                    submitBtn.disabled = false;
                    newsletterForm.reset();
                    if (typeof lucide !== 'undefined') {
                        lucide.createIcons();
                    }
                }, 3000);
            }, 1500);
        });
    }

    // Counter animation - only if elements exist
    const counters = document.querySelectorAll('.counter');
    if (counters.length > 0) {
        const animateCounter = (counter) => {
            const target = parseInt(counter.getAttribute('data-target'));
            if (isNaN(target)) return;
            
            const duration = 2000;
            const increment = target / (duration / 16);
            let current = 0;
            
            const updateCounter = () => {
                current += increment;
                if (current < target) {
                    counter.innerText = Math.floor(current).toLocaleString();
                    requestAnimationFrame(updateCounter);
                } else {
                    counter.innerText = target.toLocaleString() + (target === 98 ? '%' : '+');
                }
            };
            
            updateCounter();
        };

        const observer = new IntersectionObserver((entries) => {
            entries.forEach(entry => {
                if (entry.isIntersecting && entry.target.classList.contains('counter')) {
                    animateCounter(entry.target);
                    observer.unobserve(entry.target);
                }
            });
        }, { threshold: 0.5 });

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

    // Smooth scroll for anchor links
    document.querySelectorAll('a[href^="#"]').forEach(anchor => {
        anchor.addEventListener('click', function (e) {
            const href = this.getAttribute('href');
            if (!href || href === '#') return;
            
            const target = document.querySelector(href);
            if (target) {
                e.preventDefault();
                target.scrollIntoView({
                    behavior: 'smooth',
                    block: 'start'
                });
                // Close mobile menu if open
                if (mobileMenu && !mobileMenu.classList.contains('hidden')) {
                    mobileMenu.classList.add('hidden');
                }
            }
        });
    });

    // Scroll reveal animation
    const revealElements = document.querySelectorAll('.resource-card');
    if (revealElements.length > 0) {
        const revealObserver = new IntersectionObserver((entries) => {
            entries.forEach((entry, index) => {
                if (entry.isIntersecting) {
                    setTimeout(() => {
                        entry.target.style.opacity = '1';
                        entry.target.style.transform = 'translateY(0)';
                    }, index * 100);
                    revealObserver.unobserve(entry.target);
                }
            });
        }, { threshold: 0.1 });

        revealElements.forEach((el) => {
            el.style.opacity = '0';
            el.style.transform = 'translateY(20px)';
            el.style.transition = 'all 0.6s ease-out';
            revealObserver.observe(el);
        });
    }

    // Parallax effect for hero section - only if elements exist
    const parallaxElements = document.querySelectorAll('.animate-float');
    if (parallaxElements.length > 0) {
        window.addEventListener('scroll', () => {
            const scrolled = window.pageYOffset;
            
            parallaxElements.forEach((el, index) => {
                const speed = 0.5 + (index * 0.1);
                el.style.transform = `translateY(${scrolled * speed}px)`;
            });
        });
    }

    // Add glow effect to cards on mouse move
    document.querySelectorAll('.glass-card').forEach(card => {
        card.addEventListener('mousemove', (e) => {
            const rect = card.getBoundingClientRect();
            const x = e.clientX - rect.left;
            const y = e.clientY - rect.top;
            
            card.style.background = `radial-gradient(circle at ${x}px ${y}px, rgba(139, 92, 246, 0.1), rgba(19, 19, 31, 0.6))`;
        });
        
        card.addEventListener('mouseleave', () => {
            card.style.background = 'rgba(19, 19, 31, 0.6)';
        });
    });
})();