{% extends "base.html" %}

{% block content %}
<div class="category-page">
    <div class="header">
        <a href="{{ url_for('index') }}" class="back-link" title="返回首页">
            <i class="fas fa-arrow-left"></i>
        </a>
        <div class="header-title">
            <h1>{{ category.name }} ({{ apps|length }}个)</h1>
            {% if platform == 'tablet' %}
            <span class="platform-badge">
                <i class="fas fa-tablet-alt"></i> 平板应用
            </span>
            {% endif %}
        </div>
    </div>

    <div class="apps-grid" style="margin: 0; padding: 0;">
        {% for app in apps %}
        <div class="app-card" onclick="window.location.href='/app/{{ app.id }}'">
            <div class="app-icon">
                {% if 'http' in app.icon_path %}
                    <img data-src="{{ app.icon_path }}" alt="{{ app.name }}" src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7">
                {% else %}
                    <img data-src="{{ url_for('static', filename='uploads/' + app.icon_path) }}" alt="{{ app.name }}" src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7">
                {% endif %}
            </div>
            <div class="app-info">
                <h3>{{ app.name }}</h3>
            </div>
        </div>
        {% endfor %}
    </div>
</div>

<style>
.category-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 15px 20px 15px;
    transform: none !important;
    transition: background-color 0.3s ease;
}

.header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 30px;
    background: white;
    padding: 5px 20px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transform: none !important;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.back-link {
    color: #666;
    text-decoration: none;
    padding: 8px;
    border-radius: 50%;
    background: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.back-link:hover {
    background: #e5e5e7;
}

.header-title {
    flex: 1;
    transform: none !important;
    transition: none !important;
}

.header h1 {
    margin: 0;
    font-size: 20px;
    color: #333;
    font-weight: 500;
    font-family: "SimHei", "黑体", sans-serif;
    text-align: left;
    padding-right: auto;
    margin-right: auto;
    transform: none !important;
    transition: none !important;
}

.platform-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    background: #007AFF;
    color: white;
    border-radius: 12px;
    font-size: 12px;
    margin-left: 10px;
    transform: none !important;
    transition: none !important;
}

.header-title {
    display: flex;
    align-items: center;
    transform: none !important;
    transition: none !important;
}

/* 暗色模式样式 */
[data-theme="dark"] .category-page {
    background: #1a1a1a;
}

[data-theme="dark"] .header {
    background: #242424;
}

[data-theme="dark"] .header h1 {
    color: #fff;
}

[data-theme="dark"] .back-link {
    color: #ccc;
    background: #333;
}

[data-theme="dark"] .back-link:hover {
    background: #444;
    color: #fff;
}

[data-theme="dark"] .app-card {
    background: #242424;
}

[data-theme="dark"] .app-info h3 {
    color: #fff;
}

/* 添加全局过渡效果 */
* {
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* 确保 apps-grid 也有过渡效果 */
.apps-grid {
    transition: background-color 0.3s ease;
    background: #fff;
}

[data-theme="dark"] .apps-grid {
    background: #242424;
}

.floating-buttons {
    position: fixed;
    bottom: 40px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    padding: 0;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

/* 暗色模式样式 */
[data-theme="dark"] .theme-toggle {
    background: #333;
    color: #fff;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .floating-buttons {
        bottom: 30px;
        right: 15px;
        gap: 8px;
    }
    
    .theme-toggle {
        width: 36px;
        height: 36px;
    }
}

/* 添加图片渐显效果 */
.app-icon img {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.app-icon img.loaded {
    opacity: 1;
}
</style>

<script>
// 保存滚动位置和来源页面
window.addEventListener('beforeunload', () => {
    sessionStorage.setItem('categoryScrollPosition', window.scrollY);
    // 保存来源页面的路径
    if (document.referrer) {
        sessionStorage.setItem('categoryReferer', document.referrer);
    }
});

// 恢复滚动位置
document.addEventListener('DOMContentLoaded', () => {
    // 检查是否是从应用详情页返回
    if (document.referrer.includes('/app/')) {
        const scrollPosition = sessionStorage.getItem('categoryScrollPosition');
        if (scrollPosition) {
            window.scrollTo(0, parseInt(scrollPosition));
            sessionStorage.removeItem('categoryScrollPosition');
        }
    }
    
    // 优化图片懒加载
    const imageObserver = new IntersectionObserver((entries, observer) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                const img = entry.target;
                // 预加载图片
                const tempImage = new Image();
                tempImage.onload = () => {
                    img.src = tempImage.src;
                    img.classList.add('loaded');
                };
                tempImage.src = img.dataset.src;
                observer.unobserve(img);
            }
        });
    }, {
        rootMargin: '100px 0px', // 增加预加载距离
        threshold: 0.01
    });

    // 批量处理图片
    const images = document.querySelectorAll('img[data-src]');
    if (images.length > 0) {
        images.forEach(img => imageObserver.observe(img));
    }
});

// 修改返回链接的处理
document.querySelector('.back-link').addEventListener('click', function(e) {
    e.preventDefault();
    window.history.back();
});
</script>
{% endblock %}