// 移动端优化组件
(function() {
    let isMobile = false;
    let isTablet = false;
    let currentOrientation = 'portrait';
    
    // 检测设备类型
    function detectDevice() {
        const userAgent = navigator.userAgent.toLowerCase();
        const screenWidth = window.innerWidth;
        const screenHeight = window.innerHeight;
        
        // 检测是否为移动设备
        isMobile = /android|webos|iphone|ipad|ipod|blackberry|iemobile|opera mini/i.test(userAgent) || screenWidth <= 768;
        isTablet = /ipad|android(?!.*mobile)|tablet/i.test(userAgent) || (screenWidth > 768 && screenWidth <= 1024);
        
        // 检测屏幕方向
        currentOrientation = screenWidth > screenHeight ? 'landscape' : 'portrait';
        
        // 添加设备类到body（确保body存在）
        if (document.body) {
            document.body.classList.remove('mobile', 'tablet', 'desktop', 'portrait', 'landscape');
            document.body.classList.add(
                isMobile ? 'mobile' : isTablet ? 'tablet' : 'desktop',
                currentOrientation
            );
        }
        
        return { isMobile, isTablet, currentOrientation };
    }
    
    // 添加移动端优化样式
    function addMobileStyles() {
        const style = document.createElement('style');
        style.textContent = `
            /* 移动端基础优化 */
            * {
                -webkit-tap-highlight-color: transparent;
                -webkit-touch-callout: none;
                -webkit-user-select: none;
                -moz-user-select: none;
                -ms-user-select: none;
                user-select: none;
            }
            
            /* 允许文本选择 */
            p, h1, h2, h3, h4, h5, h6, span, div, article, section {
                -webkit-user-select: text;
                -moz-user-select: text;
                -ms-user-select: text;
                user-select: text;
            }
            
            /* 移动端滚动优化 */
            html {
                -webkit-overflow-scrolling: touch;
                scroll-behavior: smooth;
            }
            
            /* 移动端字体优化 */
            body.mobile {
                font-size: 16px; /* 防止iOS缩放 */
                line-height: 1.6;
                -webkit-text-size-adjust: 100%;
                -moz-text-size-adjust: 100%;
                -ms-text-size-adjust: 100%;
            }
            
            /* 移动端容器优化 */
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            
            body.mobile .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            
            body.tablet .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
            
            /* 移动端导航优化 */
            body.mobile #navbar {
                padding: 0.75rem 1rem;
            }
            
            body.mobile .nav-container {
                padding: 0.75rem 0;
            }
            
            /* 移动端按钮优化 */
            body.mobile button,
            body.mobile .btn {
                min-height: 44px; /* iOS推荐的最小触摸目标 */
                padding: 0.75rem 1.5rem;
                font-size: 1rem;
            }
            
            /* 移动端表单优化 */
            body.mobile input,
            body.mobile textarea,
            body.mobile select {
                min-height: 44px;
                padding: 0.75rem;
                font-size: 16px; /* 防止iOS缩放 */
                border-radius: 8px;
            }
            
            /* 移动端卡片优化 */
            body.mobile .card,
            body.mobile .glass-card {
                margin-bottom: 1rem;
                padding: 1rem;
                border-radius: 12px;
            }
            
            /* 移动端文字优化 */
            body.mobile h1 {
                font-size: 2rem;
                line-height: 1.2;
                margin-bottom: 1rem;
            }
            
            body.mobile h2 {
                font-size: 1.75rem;
                line-height: 1.3;
                margin-bottom: 0.75rem;
            }
            
            body.mobile h3 {
                font-size: 1.5rem;
                line-height: 1.4;
                margin-bottom: 0.5rem;
            }
            
            body.mobile p {
                font-size: 1rem;
                line-height: 1.6;
                margin-bottom: 1rem;
            }
            
            /* 移动端网格优化 */
            body.mobile .grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            
            body.mobile .grid-cols-2,
            body.mobile .grid-cols-3,
            body.mobile .grid-cols-4,
            body.mobile .md\\:grid-cols-2,
            body.mobile .md\\:grid-cols-3,
            body.mobile .lg\\:grid-cols-3 {
                grid-template-columns: 1fr;
            }
            
            /* 平板端网格优化 */
            body.tablet .grid-cols-3,
            body.tablet .lg\\:grid-cols-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            
            /* 移动端间距优化 */
            body.mobile .py-16 { padding-top: 3rem; padding-bottom: 3rem; }
            body.mobile .py-12 { padding-top: 2rem; padding-bottom: 2rem; }
            body.mobile .py-8 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
            body.mobile .mb-12 { margin-bottom: 2rem; }
            body.mobile .mb-8 { margin-bottom: 1.5rem; }
            
            /* 移动端图片优化 */
            body.mobile img {
                max-width: 100%;
                height: auto;
                border-radius: 8px;
            }
            
            /* 横屏优化 */
            body.mobile.landscape {
                /* 横屏时减少垂直间距 */
            }
            
            body.mobile.landscape .py-16 { 
                padding-top: 2rem; 
                padding-bottom: 2rem; 
            }
            
            body.mobile.landscape h1 {
                font-size: 1.75rem;
                margin-bottom: 0.75rem;
            }
            
            /* 移动端返回顶部按钮优化 */
            body.mobile #back-to-top {
                bottom: 1.5rem;
                right: 1.5rem;
            }
            
            body.mobile .back-to-top-btn {
                width: 3rem;
                height: 3rem;
            }
            
            /* 移动端页面加载器优化 */
            body.mobile #page-loader .w-20 {
                width: 4rem;
                height: 4rem;
            }
            
            body.mobile #page-loader h1 {
                font-size: 1.25rem;
            }
            
            body.mobile #page-loader .w-64 {
                width: 16rem;
            }
            
            /* 防止页面缩放 */
            @media screen and (max-width: 768px) {
                html {
                    zoom: 1;
                    -ms-zoom: 1;
                    -webkit-zoom: 1;
                    -moz-zoom: 1;
                }
            }
            
            /* 触摸设备特定优化 */
            @media (hover: none) and (pointer: coarse) {
                /* 移除hover效果，使用active效果 */
                .hover\\:scale-110:hover {
                    transform: none;
                }
                
                .hover\\:scale-110:active {
                    transform: scale(1.05);
                }
                
                .hover\\:shadow-xl:hover {
                    box-shadow: none;
                }
                
                .hover\\:shadow-xl:active {
                    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
                }
            }
            
            /* 安全区域适配（iPhone X等带刘海屏的设备） */
            @supports (padding: max(0px)) {
                body.mobile {
                    padding-left: max(1rem, env(safe-area-inset-left));
                    padding-right: max(1rem, env(safe-area-inset-right));
                }
                
                body.mobile #navbar {
                    padding-left: max(1rem, env(safe-area-inset-left));
                    padding-right: max(1rem, env(safe-area-inset-right));
                    padding-top: max(0.75rem, env(safe-area-inset-top));
                }
                
                body.mobile #back-to-top {
                    right: max(1.5rem, env(safe-area-inset-right));
                    bottom: max(1.5rem, env(safe-area-inset-bottom));
                }
            }
        `;
        document.head.appendChild(style);
    }
    
    // 优化图片加载
    function optimizeImages() {
        const images = document.querySelectorAll('img');
        
        images.forEach(img => {
            // 添加懒加载
            if (!img.loading) {
                img.loading = 'lazy';
            }
            
            // 添加错误处理
            img.addEventListener('error', function() {
                this.style.display = 'none';
            });
            
            // 移动端图片优化
            if (isMobile) {
                // 移动端使用较小的图片
                const src = img.src;
                if (src && !src.includes('placeholder')) {
                    // 这里可以添加图片压缩逻辑
                }
            }
        });
    }
    
    // 优化触摸事件
    function optimizeTouch() {
        // 添加触摸反馈
        document.addEventListener('touchstart', function(e) {
            const target = e.target;
            if (target.tagName === 'BUTTON' || target.classList.contains('btn') || target.tagName === 'A') {
                target.style.opacity = '0.7';
            }
        }, { passive: true });
        
        document.addEventListener('touchend', function(e) {
            const target = e.target;
            if (target.tagName === 'BUTTON' || target.classList.contains('btn') || target.tagName === 'A') {
                setTimeout(() => {
                    target.style.opacity = '';
                }, 150);
            }
        }, { passive: true });
        
        // 防止双击缩放
        let lastTouchEnd = 0;
        document.addEventListener('touchend', function(event) {
            const now = (new Date()).getTime();
            if (now - lastTouchEnd <= 300) {
                event.preventDefault();
            }
            lastTouchEnd = now;
        }, false);
    }
    
    // 处理屏幕方向变化
    function handleOrientationChange() {
        // 延迟执行以确保尺寸更新
        setTimeout(() => {
            detectDevice();
            
            // 重新计算布局
            const event = new Event('resize');
            window.dispatchEvent(event);
            
            // 滚动到顶部（防止方向变化后位置错乱）
            if (window.scrollY > 100) {
                window.scrollTo({ top: 0, behavior: 'smooth' });
            }
        }, 100);
    }
    
    // 优化键盘弹出时的布局
    function handleKeyboard() {
        if (!isMobile) return;
        
        const originalHeight = window.innerHeight;
        let keyboardOpen = false;
        
        window.addEventListener('resize', function() {
            const currentHeight = window.innerHeight;
            const heightDifference = originalHeight - currentHeight;
            
            // 键盘弹出（高度减少超过150px）
            if (heightDifference > 150 && !keyboardOpen) {
                keyboardOpen = true;
                document.body.classList.add('keyboard-open');
                
                // 隐藏导航栏（为输入框腾出空间）
                const navbar = document.getElementById('navbar');
                if (navbar) {
                    navbar.style.transform = 'translateY(-100%)';
                }
                
                // 隐藏返回顶部按钮
                const backToTop = document.getElementById('back-to-top');
                if (backToTop) {
                    backToTop.style.display = 'none';
                }
            } 
            // 键盘收起
            else if (heightDifference <= 150 && keyboardOpen) {
                keyboardOpen = false;
                document.body.classList.remove('keyboard-open');
                
                // 恢复导航栏
                const navbar = document.getElementById('navbar');
                if (navbar) {
                    navbar.style.transform = '';
                }
                
                // 恢复返回顶部按钮
                const backToTop = document.getElementById('back-to-top');
                if (backToTop) {
                    backToTop.style.display = '';
                }
            }
        });
    }
    
    // 性能优化
    function optimizePerformance() {
        // 使用 Intersection Observer 优化动画
        if ('IntersectionObserver' in window) {
            const observer = new IntersectionObserver((entries) => {
                entries.forEach(entry => {
                    if (entry.isIntersecting) {
                        entry.target.classList.add('animate-visible');
                    }
                });
            }, {
                threshold: 0.1,
                rootMargin: '50px'
            });
            
            // 观察所有动画元素
            document.querySelectorAll('[class*="animate-"]').forEach(el => {
                if (!el.classList.contains('animate-visible')) {
                    observer.observe(el);
                }
            });
        }
        
        // 移动端减少动画
        if (isMobile) {
            const mediaQuery = window.matchMedia('(prefers-reduced-motion: reduce)');
            if (mediaQuery.matches) {
                document.body.classList.add('reduce-motion');
            }
        }
    }
    
    // 添加调试信息（开发环境）
    function addDebugInfo() {
        if (window.location.hostname === 'localhost' || window.location.hostname === '127.0.0.1') {
            const debugInfo = document.createElement('div');
            debugInfo.style.cssText = `
                position: fixed;
                top: 70px;
                right: 10px;
                background: rgba(0,0,0,0.8);
                color: white;
                padding: 8px;
                border-radius: 4px;
                font-size: 12px;
                z-index: 10000;
                font-family: monospace;
            `;
            
            function updateDebugInfo() {
                const { isMobile, isTablet, currentOrientation } = detectDevice();
                debugInfo.innerHTML = `
                    ${window.innerWidth}×${window.innerHeight}<br>
                    ${isMobile ? 'Mobile' : isTablet ? 'Tablet' : 'Desktop'}<br>
                    ${currentOrientation}
                `;
            }
            
            updateDebugInfo();
            document.body.appendChild(debugInfo);
            
            window.addEventListener('resize', updateDebugInfo);
            window.addEventListener('orientationchange', updateDebugInfo);
        }
    }
    
    // 初始化移动端优化
    function init() {
        // 检测设备类型
        detectDevice();
        
        // 添加移动端样式
        addMobileStyles();
        
        // 优化触摸体验
        optimizeTouch();
        
        // 处理屏幕方向变化
        window.addEventListener('orientationchange', handleOrientationChange);
        window.addEventListener('resize', () => {
            setTimeout(detectDevice, 100);
        });
        
        // 页面加载完成后的优化
        if (document.readyState === 'loading') {
            document.addEventListener('DOMContentLoaded', () => {
                setTimeout(() => {
                    optimizeImages();
                    handleKeyboard();
                    optimizePerformance();
                    addDebugInfo();
                }, 500);
            });
        } else {
            setTimeout(() => {
                optimizeImages();
                handleKeyboard();
                optimizePerformance();
                addDebugInfo();
            }, 500);
        }
        
        // 监听页面加载完成事件
        document.addEventListener('pageLoaded', () => {
            setTimeout(() => {
                optimizeImages();
                optimizePerformance();
            }, 100);
        });
    }
    
    // 提供外部接口
    window.MobileOptimize = {
        detectDevice,
        isMobile: () => isMobile,
        isTablet: () => isTablet,
        getCurrentOrientation: () => currentOrientation,
        optimizeImages,
        optimizePerformance
    };
    
    // 初始化
    init();
})();