// ===== GESTIONNAIRE D'ÉTAT DE L'APPLICATION =====
class AppState {
    constructor() {
        this.currentPage = 'home';
        this.isMenuOpen = false;
        this.visitedPages = new Set(['home']);
        this.init();
    }

    init() {
        // Suivre la navigation
        this.trackNavigation();
        // Initialiser les écouteurs d'événements globaux
        this.initGlobalEventListeners();
    }

    trackNavigation() {
        // Suivre les pages visitées pour des statistiques potentielles
        console.log(`Page actuelle: ${this.currentPage}`);
    }

    toggleMenu() {
        this.isMenuOpen = !this.isMenuOpen;
        document.dispatchEvent(new CustomEvent('menuStateChange', { 
            detail: { isOpen: this.isMenuOpen } 
        }));
        return this.isMenuOpen;
    }

    navigateTo(page) {
        this.currentPage = page;
        this.visitedPages.add(page);
        document.dispatchEvent(new CustomEvent('pageChange', { 
            detail: { page } 
        }));
    }

    initGlobalEventListeners() {
        // Gérer les changements de page
        document.addEventListener('pageChange', (e) => {
            console.log(`Navigation vers: ${e.detail.page}`);
            // Mettre à jour l'URL si nécessaire
            if (window.history && window.history.pushState) {
                window.history.pushState({ page: e.detail.page }, '', `#${e.detail.page}`);
            }
        });

        // Gérer le bouton retour
        window.addEventListener('popstate', (e) => {
            if (e.state && e.state.page) {
                this.currentPage = e.state.page;
                document.dispatchEvent(new CustomEvent('pageChange', { 
                    detail: { page: e.state.page } 
                }));
            }
        });

        // Écouter les clics sur les liens internes
        document.addEventListener('click', (e) => {
            const link = e.target.closest('a[href^="#"]');
            if (link) {
                e.preventDefault();
                const targetId = link.getAttribute('href').substring(1);
                const targetElement = document.getElementById(targetId);
                if (targetElement) {
                    this.smoothScrollTo(targetElement);
                }
            }
        });
    }

    smoothScrollTo(element) {
        const elementPosition = element.getBoundingClientRect().top;
        const offsetPosition = elementPosition + window.pageYOffset - 100;

        window.scrollTo({
            top: offsetPosition,
            behavior: 'smooth'
        });
    }
}

// ===== GESTIONNAIRE D'ANIMATIONS =====
class AnimationManager {
    constructor() {
        this.observer = null;
        this.animatedElements = new Set();
        this.init();
    }

    init() {
        this.setupIntersectionObserver();
        this.initScrollAnimations();
        this.initHoverEffects();
    }

    setupIntersectionObserver() {
        const options = {
            root: null,
            rootMargin: '0px',
            threshold: 0.1
        };

        this.observer = new IntersectionObserver((entries) => {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    this.animateElement(entry.target);
                    this.observer.unobserve(entry.target);
                }
            });
        }, options);

        // Observer les éléments à animer
        document.querySelectorAll('.animate-on-scroll').forEach(el => {
            this.observer.observe(el);
        });
    }

    animateElement(element) {
        if (this.animatedElements.has(element)) return;
        
        this.animatedElements.add(element);
        element.classList.add('animate-in');
        
        // Ajouter un délai basé sur la position
        const delay = Array.from(element.parentNode.children).indexOf(element) * 100;
        element.style.animationDelay = `${delay}ms`;
    }

    initScrollAnimations() {
        let lastScrollTop = 0;
        const navbar = document.querySelector('custom-navbar');
        
        window.addEventListener('scroll', () => {
            const scrollTop = window.pageYOffset || document.documentElement.scrollTop;
            
            // Gérer la navbar
            if (navbar) {
                if (scrollTop > 100) {
                    navbar.setAttribute('scrolled', 'true');
                } else {
                    navbar.removeAttribute('scrolled');
                }
            }
            
            // Animation au défilement
            const scrolled = scrollTop > 50;
            document.body.classList.toggle('scrolled', scrolled);
            
            lastScrollTop = scrollTop;
        }, { passive: true });
    }

    initHoverEffects() {
        // Effets de survol pour les cartes
        document.addEventListener('mouseover', (e) => {
            const card = e.target.closest('.factor-card, .process-step, custom-card');
            if (card && !card.classList.contains('hovering')) {
                card.classList.add('hovering');
                this.addHoverEffect(card);
            }
        });

        document.addEventListener('mouseout', (e) => {
            const card = e.target.closest('.factor-card, .process-step, custom-card');
            if (card) {
                card.classList.remove('hovering');
            }
        });
    }

    addHoverEffect(element) {
        // Effet visuel subtil au survol
        element.style.transition = 'all 0.3s ease';
    }
}

// ===== GESTIONNAIRE DE THÈME =====
class ThemeManager {
    constructor() {
        this.currentTheme = 'dark';
        this.themes = {
            dark: {
                '--color-bg-primary': '#0A1929',
                '--color-bg-secondary': '#132F4C',
                '--color-text-primary': '#E3F2FD'
            },
            light: {
                '--color-bg-primary': '#F5F7FA',
                '--color-bg-secondary': '#FFFFFF',
                '--color-text-primary': '#0A1929'
            }
        };
        this.init();
    }

    init() {
        this.loadTheme();
        this.initThemeToggle();
    }

    loadTheme() {
        const savedTheme = localStorage.getItem('theme') || 'dark';
        this.setTheme(savedTheme);
    }

    setTheme(themeName) {
        if (!this.themes[themeName]) return;
        
        this.currentTheme = themeName;
        const theme = this.themes[themeName];
        
        Object.entries(theme).forEach(([property, value]) => {
            document.documentElement.style.setProperty(property, value);
        });
        
        localStorage.setItem('theme', themeName);
        document.dispatchEvent(new CustomEvent('themeChange', { 
            detail: { theme: themeName } 
        }));
    }

    toggleTheme() {
        const newTheme = this.currentTheme === 'dark' ? 'light' : 'dark';
        this.setTheme(newTheme);
    }

    initThemeToggle() {
        // Créer un bouton de bascule de thème si nécessaire
        const themeToggle = document.createElement('button');
        themeToggle.className = 'theme-toggle';
        themeToggle.innerHTML = '<i class="fas fa-moon"></i>';
        themeToggle.style.cssText = `
            position: fixed;
            bottom: 20px;
            right: 20px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--color-primary);
            color: white;
            border: none;
            cursor: pointer;
            z-index: 1000;
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            transition: all 0.3s ease;
        `;
        
        themeToggle.addEventListener('click', () => this.toggleTheme());
        document.body.appendChild(themeToggle);
    }
}

// ===== GESTIONNAIRE DE PERFORMANCE =====
class PerformanceManager {
    constructor() {
        this.init();
    }

    init() {
        this.optimizeImages();
        this.deferNonCriticalResources();
        this.monitorPerformance();
    }

    optimizeImages() {
        // Chargement différé des images
        const images = document.querySelectorAll('img[data-src]');
        const imageObserver = new IntersectionObserver((entries, observer) => {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    const img = entry.target;
                    img.src = img.dataset.src;
                    img.removeAttribute('data-src');
                    observer.unobserve(img);
                }
            });
        });

        images.forEach(img => imageObserver.observe(img));
    }

    deferNonCriticalResources() {
        // Différer le chargement des polices non critiques
        const link = document.createElement('link');
        link.rel = 'preload';
        link.as = 'style';
        link.href = 'https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@300;400;500;600;700&display=swap';
        link.onload = () => link.rel = 'stylesheet';
        document.head.appendChild(link);
    }

    monitorPerformance() {
        // Surveiller les métriques de performance
        if ('PerformanceObserver' in window) {
            const observer = new PerformanceObserver((list) => {
                for (const entry of list.getEntries()) {
                    console.log(`[Performance] ${entry.name}: ${entry.duration.toFixed(2)}ms`);
                }
            });
            
            observer.observe({ entryTypes: ['measure', 'paint', 'largest-contentful-paint'] });
        }
    }
}

// ===== INITIALISATION DE L'APPLICATION =====
class App {
    constructor() {
        this.state = new AppState();
        this.animations = new AnimationManager();
        this.theme = new ThemeManager();
        this.performance = new PerformanceManager();
        this.init();
    }

    init() {
        this.initSmoothScrolling();
        this.initBackToTop();
        this.initPrintButton();
        this.initCopyButtons();
        this.initAnalytics();
    }

    initSmoothScrolling() {
        // Scrolling fluide pour les ancres
        document.querySelectorAll('a[href^="#"]').forEach(anchor => {
            anchor.addEventListener('click', function(e) {
                e.preventDefault();
                const target = document.querySelector(this.getAttribute('href'));
                if (target) {
                    target.scrollIntoView({ 
                        behavior: 'smooth',
                        block: 'start'
                    });
                }
            });
        });
    }

    initBackToTop() {
        // Bouton retour en haut
        const backToTop = document.createElement('button');
        backToTop.className = 'back-to-top';
        backToTop.innerHTML = '<i class="fas fa-chevron-up"></i>';
        backToTop.style.cssText = `
            position: fixed;
            bottom: 80px;
            right: 20px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--color-primary);
            color: white;
            border: none;
            cursor: pointer;
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        `;

        backToTop.addEventListener('click', () => {
            window.scrollTo({ top: 0, behavior: 'smooth' });
        });

        document.body.appendChild(backToTop);

        // Afficher/masquer le bouton
        window.addEventListener('scroll', () => {
            if (window.scrollY > 300) {
                backToTop.style.opacity = '1';
                backToTop.style.visibility = 'visible';
            } else {
                backToTop.style.opacity = '0';
                backToTop.style.visibility = 'hidden';
            }
        });
    }

    initPrintButton() {
        // Bouton d'impression
        const printButton = document.createElement('button');
        printButton.className = 'print-button';
        printButton.innerHTML = '<i class="fas fa-print"></i> Imprimer cette page';
        printButton.style.cssText = `
            position: fixed;
            bottom: 140px;
            right: 20px;
            padding: 12px 20px;
            background: var(--color-secondary);
            color: white;
            border: none;
            border-radius: 25px;
            cursor: pointer;
            z-index: 999;
            box-shadow: var(--shadow-md);
            font-family: var(--font-primary);
            font-size: 0.9rem;
            transition: all 0.3s ease;
        `;

        printButton.addEventListener('click', () => {
            window.print();
        });

        printButton.addEventListener('mouseenter', () => {
            printButton.style.transform = 'translateY(-2px)';
            printButton.style.boxShadow = 'var(--shadow-lg)';
        });

        printButton.addEventListener('mouseleave', () => {
            printButton.style.transform = 'translateY(0)';
            printButton.style.boxShadow = 'var(--shadow-md)';
        });

        document.body.appendChild(printButton);
    }

    initCopyButtons() {
        // Boutons de copie pour le code et équations
        document.querySelectorAll('.equation-box, pre code').forEach(element => {
            const copyButton = document.createElement('button');
            copyButton.className = 'copy-button';
            copyButton.innerHTML = '<i class="far fa-copy"></i>';
            copyButton.title = 'Copier';
            copyButton.style.cssText = `
                position: absolute;
                top: 10px;
                right: 10px;
                background: rgba(255, 255, 255, 0.1);
                border: 1px solid var(--color-border);
                color: var(--color-text-muted);
                border-radius: 4px;
                padding: 5px 10px;
                cursor: pointer;
                font-size: 0.8rem;
                transition: all 0.2s ease;
            `;

            copyButton.addEventListener('click', async () => {
                const text = element.textContent || element.innerText;
                try {
                    await navigator.clipboard.writeText(text);
                    copyButton.innerHTML = '<i class="fas fa-check"></i>';
                    copyButton.style.color = 'var(--color-primary-light)';
                    setTimeout(() => {
                        copyButton.innerHTML = '<i class="far fa-copy"></i>';
                        copyButton.style.color = 'var(--color-text-muted)';
                    }, 2000);
                } catch (err) {
                    console.error('Erreur de copie:', err);
                }
            });

            element.style.position = 'relative';
            element.appendChild(copyButton);
        });
    }

    initAnalytics() {
        // Analytics simple (peut être étendu)
        window.addEventListener('load', () => {
            console.log('Page complètement chargée');
            const loadTime = window.performance.timing.domContentLoadedEventEnd - window.performance.timing.navigationStart;
            console.log(`Temps de chargement: ${loadTime}ms`);
        });
    }
}

// ===== INITIALISATION AU CHARGEMENT =====
document.addEventListener('DOMContentLoaded', () => {
    // Initialiser l'application
    window.app = new App();
    
    // Vérifier la compatibilité Web Components
    if (!('customElements' in window)) {
        console.error('Web Components non supportés par ce navigateur');
        return;
    }
    
    // Initialiser Feather Icons
    if (typeof feather !== 'undefined') {
        feather.replace();
    }
    
    // Initialiser Font Awesome
    if (typeof FontAwesomeKitConfig !== 'undefined') {
        console.log('Font Awesome chargé');
    }
    
    // Afficher un message de bienvenue
    console.log('%c🌱 Photosynthèse Éclatée 🌱', 'color: #4CAF50; font-size: 18px; font-weight: bold;');
    console.log('Site éducatif sur la photosynthèse - Chargé avec succès');
});