/**
 * AI Creative Studio - Main JavaScript
 * Vanilla JavaScript (No jQuery)
 *
 * @package AI_Creative_Studio
 */

(function() {
    'use strict';

    /**
     * External Links Handler
     */
    function aicsInitExternalLinks() {
        const links = document.querySelectorAll('a[href^="http"]');
        const currentDomain = window.location.hostname;
        
        links.forEach(function(link) {
            try {
                const linkDomain = new URL(link.href).hostname;
                
                if (linkDomain !== currentDomain) {
                    link.setAttribute('target', '_blank');
                    link.setAttribute('rel', 'noopener noreferrer');
                }
            } catch (e) {
                // Do nothing on URL parsing error
            }
        });
    }

    /**
     * Smooth Scroll Initialization
     */
    function aicsInitSmoothScroll() {
        const links = document.querySelectorAll('a[href^="#"]');
        
        links.forEach(function(link) {
            link.addEventListener('click', function(e) {
                const href = this.getAttribute('href');
                
                if (href === '#' || href === '#top') {
                    e.preventDefault();
                    window.scrollTo({
                        top: 0,
                        behavior: 'smooth'
                    });
                    return;
                }
                
                const target = document.querySelector(href);
                
                if (target) {
                    e.preventDefault();
                    target.scrollIntoView({
                        behavior: 'smooth',
                        block: 'start'
                    });
                }
            });
        });
    }

    /**
     * Mobile Menu Initialization
     */
    function aicsInitMobileMenu() {
        const menuToggle = document.querySelector('.menu-toggle');
        const navigation = document.querySelector('.main-navigation');
        
        if (!menuToggle || !navigation) {
            return;
        }
        
        // Menu toggle click event
        menuToggle.addEventListener('click', function() {
            const isExpanded = this.getAttribute('aria-expanded') === 'true';
            
            // Toggle aria-expanded attribute
            this.setAttribute('aria-expanded', !isExpanded);
            
            // Toggle navigation display
            navigation.classList.toggle('is-open');
            
            // Control body scroll
            document.body.style.overflow = !isExpanded ? 'hidden' : '';
        });
        
        // Close on outside click
        document.addEventListener('click', function(e) {
            if (!navigation.contains(e.target) && !menuToggle.contains(e.target)) {
                if (navigation.classList.contains('is-open')) {
                    menuToggle.setAttribute('aria-expanded', 'false');
                    navigation.classList.remove('is-open');
                    document.body.style.overflow = '';
                }
            }
        });
        
        // Close menu on ESC key
        document.addEventListener('keydown', function(e) {
            if (e.key === 'Escape' && navigation.classList.contains('is-open')) {
                menuToggle.setAttribute('aria-expanded', 'false');
                navigation.classList.remove('is-open');
                document.body.style.overflow = '';
                menuToggle.focus();
            }
        });
    }

    /**
     * Execute after DOM loaded
     */
    document.addEventListener('DOMContentLoaded', function() {
        
        // 外部リンクに target="_blank" を追加
        aicsInitExternalLinks();
        
        // Smooth scroll
        aicsInitSmoothScroll();
        
        // Mobile menu
        aicsInitMobileMenu();
        
        // Debug information output
        if (typeof aicsData !== 'undefined') {
            console.log('AI Creative Studio Theme Loaded - Version:', aicsData.theme.version);
        }
    });

})();