// Main JavaScript file for Blue Horizon Explorer

// Initialize when DOM is loaded
document.addEventListener('DOMContentLoaded', function() {
    console.log('Blue Horizon Explorer loaded successfully!');
    
    // Initialize animations on scroll
    initScrollAnimations();
    
    // Initialize interactive elements
    initInteractiveElements();
});

// Function to initialize scroll animations
function initScrollAnimations() {
    const observerOptions = {
        root: null,
        rootMargin: '0px',
        threshold: 0.1
    };

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

    // Observe elements with data-animate attribute
    document.querySelectorAll('[data-animate]').forEach(el => {
        observer.observe(el);
    });
}

// Function to initialize interactive elements
function initInteractiveElements() {
    // Add click effects to buttons
    document.querySelectorAll('.btn-effect').forEach(button => {
        button.addEventListener('click', function(e) {
            // Create ripple effect
            const ripple = document.createElement('span');
            const rect = this.getBoundingClientRect();
            const size = Math.max(rect.width, rect.height);
            const x = e.clientX - rect.left - size / 2;
            const y = e.clientY - rect.top - size / 2;
            
            ripple.style.width = ripple.style.height = size + 'px';
            ripple.style.left = x + 'px';
            ripple.style.top = y + 'px';
            ripple.classList.add('ripple');
            
            this.appendChild(ripple);
            
            // Remove ripple after animation
            setTimeout(() => {
                ripple.remove();
            }, 600);
        });
    });
    
    // Theme toggle functionality (for future dark mode implementation)
    const themeToggle = document.getElementById('themeToggle');
    if (themeToggle) {
        themeToggle.addEventListener('click', function() {
            document.body.classList.toggle('dark-mode');
            const icon = this.querySelector('i');
            if (document.body.classList.contains('dark-mode')) {
                icon.setAttribute('data-feather', 'sun');
                localStorage.setItem('theme', 'dark');
            } else {
                icon.setAttribute('data-feather', 'moon');
                localStorage.setItem('theme', 'light');
            }
            feather.replace();
        });
    }
    
    // Load saved theme from localStorage
    const savedTheme = localStorage.getItem('theme');
    if (savedTheme === 'dark') {
        document.body.classList.add('dark-mode');
        if (themeToggle) {
            const icon = themeToggle.querySelector('i');
            icon.setAttribute('data-feather', 'sun');
            feather.replace();
        }
    }
}

// Utility function to format numbers
function formatNumber(num) {
    if (num >= 1000000) {
        return (num / 1000000).toFixed(1) + 'M';
    }
    if (num >= 1000) {
        return (num / 1000).toFixed(1) + 'K';
    }
    return num.toString();
}

// API call example for future expansion
async function fetchBlueContent() {
    try {
        const response = await fetch('https://api.unsplash.com/search/photos?query=blue&per_page=5', {
            headers: {
                'Authorization': 'Client-ID YOUR_ACCESS_KEY' // Replace with actual key
            }
        });
        const data = await response.json();
        return data;
    } catch (error) {
        console.error('Error fetching blue content:', error);
        return null;
    }
}

// Export functions for use in components if needed
window.BlueHorizonUtils = {
    formatNumber,
    fetchBlueContent
};