// Main JavaScript file for Finger Web Flask App

document.addEventListener('DOMContentLoaded', function() {
    // Initialize all functionality when DOM is loaded
    initializeFormValidation();
    initializeNavigation();
    initializeAnimations();
    initializeTooltips();
});

// Form validation and enhancement
function initializeFormValidation() {
    const forms = document.querySelectorAll('form');
    
    forms.forEach(form => {
        form.addEventListener('submit', function(event) {
            if (!form.checkValidity()) {
                event.preventDefault();
                event.stopPropagation();
            } else {
                // Add loading state to submit button
                const submitBtn = form.querySelector('button[type="submit"]');
                if (submitBtn) {
                    submitBtn.classList.add('loading');
                    submitBtn.disabled = true;
                }
            }
            
            form.classList.add('was-validated');
        });
        
        // Real-time validation feedback
        const inputs = form.querySelectorAll('input, textarea');
        inputs.forEach(input => {
            input.addEventListener('blur', function() {
                if (this.checkValidity()) {
                    this.classList.remove('is-invalid');
                    this.classList.add('is-valid');
                } else {
                    this.classList.remove('is-valid');
                    this.classList.add('is-invalid');
                }
            });
        });
    });
}

// Navigation enhancements
function initializeNavigation() {
    // Highlight current page in navigation
    const currentPath = window.location.pathname;
    const navLinks = document.querySelectorAll('.navbar-nav .nav-link');
    
    navLinks.forEach(link => {
        if (link.getAttribute('href') === currentPath) {
            link.classList.add('active');
        }
    });
    
    // Smooth scrolling for anchor links
    const anchorLinks = document.querySelectorAll('a[href^="#"]');
    anchorLinks.forEach(link => {
        link.addEventListener('click', function(e) {
            e.preventDefault();
            const target = document.querySelector(this.getAttribute('href'));
            if (target) {
                target.scrollIntoView({
                    behavior: 'smooth',
                    block: 'start'
                });
            }
        });
    });
}

// Animation and visual enhancements
function initializeAnimations() {
    // Fade in cards on scroll
    const observerOptions = {
        threshold: 0.1,
        rootMargin: '0px 0px -50px 0px'
    };
    
    const observer = new IntersectionObserver(function(entries) {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                entry.target.style.opacity = '1';
                entry.target.style.transform = 'translateY(0)';
            }
        });
    }, observerOptions);
    
    // Observe all cards
    const cards = document.querySelectorAll('.card');
    cards.forEach(card => {
        card.style.opacity = '0';
        card.style.transform = 'translateY(20px)';
        card.style.transition = 'opacity 0.6s ease, transform 0.6s ease';
        observer.observe(card);
    });
}

// Initialize Bootstrap tooltips
function initializeTooltips() {
    // Enable tooltips if Bootstrap is available
    if (typeof bootstrap !== 'undefined') {
        const tooltipTriggerList = [].slice.call(document.querySelectorAll('[data-bs-toggle="tooltip"]'));
        tooltipTriggerList.map(function(tooltipTriggerEl) {
            return new bootstrap.Tooltip(tooltipTriggerEl);
        });
    }
}

// Utility functions
function showNotification(message, type = 'info') {
    // Create a notification element
    const notification = document.createElement('div');
    notification.className = `alert alert-${type} alert-dismissible fade show position-fixed`;
    notification.style.cssText = 'top: 20px; right: 20px; z-index: 9999; min-width: 300px;';
    notification.innerHTML = `
        ${message}
        <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
    `;
    
    document.body.appendChild(notification);
    
    // Auto-remove after 5 seconds
    setTimeout(() => {
        if (notification.parentNode) {
            notification.remove();
        }
    }, 5000);
}

// API interaction helpers
async function fetchAPI(endpoint) {
    try {
        const response = await fetch(endpoint);
        if (!response.ok) {
            throw new Error(`HTTP error! status: ${response.status}`);
        }
        return await response.json();
    } catch (error) {
        console.error('API fetch error:', error);
        showNotification('Failed to fetch data from API', 'danger');
        return null;
    }
}

// Form submission with AJAX (optional enhancement)
function submitFormAjax(form, successCallback) {
    const formData = new FormData(form);
    
    fetch(form.action, {
        method: 'POST',
        body: formData
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            showNotification(data.message, 'success');
            if (successCallback) successCallback(data);
        } else {
            showNotification(data.message || 'An error occurred', 'danger');
        }
    })
    .catch(error => {
        console.error('Form submission error:', error);
        showNotification('Failed to submit form', 'danger');
    })
    .finally(() => {
        // Remove loading state
        const submitBtn = form.querySelector('button[type="submit"]');
        if (submitBtn) {
            submitBtn.classList.remove('loading');
            submitBtn.disabled = false;
        }
    });
}

// Keyboard shortcuts
document.addEventListener('keydown', function(e) {
    // Alt + H for Home
    if (e.altKey && e.key === 'h') {
        e.preventDefault();
        window.location.href = '/';
    }
    
    // Alt + A for About
    if (e.altKey && e.key === 'a') {
        e.preventDefault();
        window.location.href = '/about';
    }
    
    // Alt + F for Finger
    if (e.altKey && e.key === 'f') {
        e.preventDefault();
        window.location.href = '/finger';
    }
});

// Console welcome message
console.log('%c🚀 Finger Web Flask App', 'color: #007bff; font-size: 16px; font-weight: bold;');
console.log('%cWelcome to the developer console!', 'color: #6c757d;');
console.log('%cKeyboard shortcuts: Alt+H (Home), Alt+A (About), Alt+F (Finger)', 'color: #6c757d;');