<?php
/**
 * Download Center Block Template
 * 下载中心区块模板
 * 
 * 支持的参数：
 * - id: 区块ID
 * - class: CSS类
 * - title: 区块标题
 * - show_all_tab: 是否显示"ALL"选项卡
 * - posts_per_category: 每分类显示文章数
 * - order_by: 排序方式
 * - order: 排序顺序
 */

// 防止直接访问
if (!defined('ABSPATH')) {
    exit;
}

// 获取短代码参数或设置默认参数
global $download_center_shortcode_atts;
if (isset($download_center_shortcode_atts) && is_array($download_center_shortcode_atts)) {
    $block_id = !empty($download_center_shortcode_atts['id']) ? $download_center_shortcode_atts['id'] : 'nenghui-download-center-' . uniqid();
    $block_class = !empty($download_center_shortcode_atts['class']) ? $download_center_shortcode_atts['class'] : '';
    $title = !empty($download_center_shortcode_atts['title']) ? $download_center_shortcode_atts['title'] : 'Download Center';
    $show_all_tab = !empty($download_center_shortcode_atts['show_all_tab']) ? filter_var($download_center_shortcode_atts['show_all_tab'], FILTER_VALIDATE_BOOLEAN) : true;
    $posts_per_category = !empty($download_center_shortcode_atts['posts_per_category']) ? intval($download_center_shortcode_atts['posts_per_category']) : -1;
    $enable_pagination = !empty($download_center_shortcode_atts['enable_pagination']) ? filter_var($download_center_shortcode_atts['enable_pagination'], FILTER_VALIDATE_BOOLEAN) : false;
    $posts_per_page = !empty($download_center_shortcode_atts['posts_per_page']) ? intval($download_center_shortcode_atts['posts_per_page']) : 6;
    $order_by = !empty($download_center_shortcode_atts['order_by']) ? $download_center_shortcode_atts['order_by'] : 'date';
    $order = !empty($download_center_shortcode_atts['order']) ? $download_center_shortcode_atts['order'] : 'DESC';
} else {
    // 设置默认参数（用于直接调用模板的情况）
    $block_id = isset($block_id) ? $block_id : 'nenghui-download-center-' . uniqid();
    $block_class = isset($block_class) ? $block_class : '';
    $title = isset($title) ? $title : 'Download Center';
    $show_all_tab = isset($show_all_tab) ? $show_all_tab : true;
    $posts_per_category = isset($posts_per_category) ? $posts_per_category : -1;
    $enable_pagination = isset($enable_pagination) ? $enable_pagination : false;
    $posts_per_page = isset($posts_per_page) ? $posts_per_page : 6;
    $order_by = isset($order_by) ? $order_by : 'date';
    $order = isset($order) ? $order : 'DESC';
}

// 获取所有下载分类
$categories = get_terms(array(
    'taxonomy' => 'download_category',
    'hide_empty' => false,
));

// 如果没有分类，创建默认分类
if (empty($categories) || is_wp_error($categories)) {
    $categories = array();
}

// 获取当前页码
$current_page = max(1, get_query_var('paged', 1));

// 根据是否启用分页决定获取数据的方式
if ($enable_pagination) {
    // 启用分页时的数据获取
    $all_downloads_args = array(
        'post_type' => 'download_center',
        'post_status' => 'publish',
        'posts_per_page' => $posts_per_page,
        'paged' => $current_page,
        'orderby' => $order_by,
        'order' => $order,
    );
    $all_downloads_query = new WP_Query($all_downloads_args);
    $all_downloads = $all_downloads_query->posts;
    
    // 按分类获取下载项目（分页）
    $downloads_by_category = array();
    $category_queries = array();
    foreach ($categories as $category) {
        $category_downloads_args = array(
            'post_type' => 'download_center',
            'post_status' => 'publish',
            'posts_per_page' => $posts_per_page,
            'paged' => $current_page,
            'orderby' => $order_by,
            'order' => $order,
            'tax_query' => array(
                array(
                    'taxonomy' => 'download_category',
                    'field' => 'term_id',
                    'terms' => $category->term_id,
                ),
            ),
        );
        $category_query = new WP_Query($category_downloads_args);
        $downloads_by_category[$category->term_id] = $category_query->posts;
        $category_queries[$category->term_id] = $category_query;
    }
} else {
    // 未启用分页时的数据获取（原有逻辑）
    $all_downloads_args = array(
        'post_type' => 'download_center',
        'post_status' => 'publish',
        'posts_per_page' => $posts_per_category,
        'orderby' => $order_by,
        'order' => $order,
    );
    $all_downloads = get_posts($all_downloads_args);
    
    // 按分类获取下载项目
    $downloads_by_category = array();
    foreach ($categories as $category) {
        $category_downloads_args = array(
            'post_type' => 'download_center',
            'post_status' => 'publish',
            'posts_per_page' => $posts_per_category,
            'orderby' => $order_by,
            'order' => $order,
            'tax_query' => array(
                array(
                    'taxonomy' => 'download_category',
                    'field' => 'term_id',
                    'terms' => $category->term_id,
                ),
            ),
        );
        $downloads_by_category[$category->term_id] = get_posts($category_downloads_args);
    }
}

// 默认图片路径
$default_image = get_template_directory_uri() . '/assets/images/PDF-IMG.webp';
$download_icon = get_template_directory_uri() . '/assets/images/PDF-ICON.svg';
?>

<section id="<?php echo esc_attr($block_id); ?>" class="download-center-section nenghui-download-center <?php echo esc_attr($block_class); ?>">
    <div class="container">
        <?php if (!empty($title)): ?>
        <div class="section-header">
            <h2 class="section-title"><?php echo esc_html($title); ?></h2>
        </div>
        <?php endif; ?>
        
        <div class="download-center-content">
            <!-- 分类选项卡 -->
            <div class="download-tabs">
                <?php if ($show_all_tab && !empty($all_downloads)): ?>
                <button class="tab-button active" data-category="all">
                    ALL
                </button>
                <?php endif; ?>
                
                <?php foreach ($categories as $category): ?>
                    <?php if (!empty($downloads_by_category[$category->term_id])): ?>
                    <button class="tab-button" data-category="<?php echo esc_attr($category->term_id); ?>">
                        <?php echo esc_html($category->name); ?>
                    </button>
                    <?php endif; ?>
                <?php endforeach; ?>
            </div>
            
            <!-- 下载内容区域 -->
            <div class="download-content">
                <!-- 全部下载 -->
                <?php if ($show_all_tab && !empty($all_downloads)): ?>
                <div class="download-grid active" data-category="all">
                    <?php foreach ($all_downloads as $download): ?>
                        <?php
                        $download_url = get_post_meta($download->ID, '_download_url', true);
                        $file_size = get_post_meta($download->ID, '_file_size', true);
                        $file_type = get_post_meta($download->ID, '_file_type', true);
                        $featured_image = get_the_post_thumbnail_url($download->ID, 'full');
                        $image_url = $featured_image ? $featured_image : $default_image;
                        
                        // 如果没有设置下载链接，使用特色图像作为下载链接
                        if (empty($download_url) && $featured_image) {
                            $download_url = $featured_image;
                        }
                        ?>
                        <div class="download-card">
                            <div class="card-image">
                                <img src="<?php echo esc_url($image_url); ?>" alt="<?php echo esc_attr($download->post_title); ?>" loading="lazy">
                            </div>
                            <div class="card-content">
                                <h3 class="card-title"><?php echo esc_html($download->post_title); ?></h3>
                                <?php if (!empty($download->post_excerpt)): ?>
                                <p class="card-excerpt"><?php echo esc_html($download->post_excerpt); ?></p>
                                <?php endif; ?>
                                
                                <div class="card-meta">
                                    <?php if (!empty($file_type)): ?>
                                    <span class="file-type"><?php echo esc_html($file_type); ?></span>
                                    <?php endif; ?>
                                    <?php if (!empty($file_size)): ?>
                                    <span class="file-size"><?php echo esc_html($file_size); ?></span>
                                    <?php endif; ?>
                                </div>
                                
                                <?php if (!empty($download_url)): ?>
                                <a href="<?php echo esc_url($download_url); ?>" class="download-button" download target="_blank">
                                    <img src="<?php echo esc_url($download_icon); ?>" alt="Download" class="download-icon">
                                    Download
                                </a>
                                <?php endif; ?>
                            </div>
                        </div>
                    <?php endforeach; ?>
                </div>
                <?php endif; ?>
                
                <!-- 分类下载 -->
                <?php foreach ($categories as $category): ?>
                    <?php if (!empty($downloads_by_category[$category->term_id])): ?>
                    <div class="download-grid" data-category="<?php echo esc_attr($category->term_id); ?>">
                        <?php foreach ($downloads_by_category[$category->term_id] as $download): ?>
                            <?php
                            $download_url = get_post_meta($download->ID, '_download_url', true);
                            $file_size = get_post_meta($download->ID, '_file_size', true);
                            $file_type = get_post_meta($download->ID, '_file_type', true);
                            $featured_image = get_the_post_thumbnail_url($download->ID, 'full');
                            $image_url = $featured_image ? $featured_image : $default_image;
                            
                            // 如果没有设置下载链接，使用特色图像作为下载链接
                            if (empty($download_url) && $featured_image) {
                                $download_url = $featured_image;
                            }
                            ?>
                            <div class="download-card">
                                <div class="card-image">
                                    <img src="<?php echo esc_url($image_url); ?>" alt="<?php echo esc_attr($download->post_title); ?>" loading="lazy">
                                </div>
                                <div class="card-content">
                                    <h3 class="card-title"><?php echo esc_html($download->post_title); ?></h3>
                                    <?php if (!empty($download->post_excerpt)): ?>
                                    <p class="card-excerpt"><?php echo esc_html($download->post_excerpt); ?></p>
                                    <?php endif; ?>
                                    
                                    <div class="card-meta">
                                        <?php if (!empty($file_type)): ?>
                                        <span class="file-type"><?php echo esc_html($file_type); ?></span>
                                        <?php endif; ?>
                                        <?php if (!empty($file_size)): ?>
                                        <span class="file-size"><?php echo esc_html($file_size); ?></span>
                                        <?php endif; ?>
                                    </div>
                                    
                                    <?php if (!empty($download_url)): ?>
                                    <a href="<?php echo esc_url($download_url); ?>" class="download-button" download target="_blank">
                                        <img src="<?php echo esc_url($download_icon); ?>" alt="Download" class="download-icon">
                                        Download
                                    </a>
                                    <?php endif; ?>
                                </div>
                            </div>
                        <?php endforeach; ?>
                    </div>
                    <?php endif; ?>
                <?php endforeach; ?>
            </div>
            
            <?php if ($enable_pagination): ?>
            <!-- 分页导航 -->
            <div class="download-pagination">
                <!-- 全部分类的分页 -->
                <?php if ($show_all_tab && !empty($all_downloads)): ?>
                <div class="pagination-wrapper" data-category="all">
                    <?php
                    $pagination_args = array(
                        'total' => $all_downloads_query->max_num_pages,
                        'current' => $current_page,
                        'format' => '?paged=%#%',
                        'show_all' => false,
                        'end_size' => 1,
                        'mid_size' => 2,
                        'prev_next' => true,
                        'prev_text' => '&laquo; Previous',
                        'next_text' => 'Next &raquo;',
                        'type' => 'array'
                    );
                    $pagination_links = paginate_links($pagination_args);
                    if ($pagination_links) {
                        echo '<nav class="pagination-nav">';
                        echo '<ul class="pagination-list">';
                        foreach ($pagination_links as $link) {
                            echo '<li class="pagination-item">' . $link . '</li>';
                        }
                        echo '</ul>';
                        echo '</nav>';
                    }
                    ?>
                </div>
                <?php endif; ?>
                
                <!-- 各分类的分页 -->
                <?php foreach ($categories as $category): ?>
                    <?php if (!empty($downloads_by_category[$category->term_id]) && isset($category_queries[$category->term_id])): ?>
                    <div class="pagination-wrapper" data-category="<?php echo esc_attr($category->term_id); ?>">
                        <?php
                        $category_query = $category_queries[$category->term_id];
                        $pagination_args = array(
                            'total' => $category_query->max_num_pages,
                            'current' => $current_page,
                            'format' => '?paged=%#%',
                            'show_all' => false,
                            'end_size' => 1,
                            'mid_size' => 2,
                            'prev_next' => true,
                            'prev_text' => '&laquo; Previous',
                            'next_text' => 'Next &raquo;',
                            'type' => 'array'
                        );
                        $pagination_links = paginate_links($pagination_args);
                        if ($pagination_links) {
                            echo '<nav class="pagination-nav">';
                            echo '<ul class="pagination-list">';
                            foreach ($pagination_links as $link) {
                                echo '<li class="pagination-item">' . $link . '</li>';
                            }
                            echo '</ul>';
                            echo '</nav>';
                        }
                        ?>
                    </div>
                    <?php endif; ?>
                <?php endforeach; ?>
            </div>
            <?php endif; ?>
        </div>
    </div>
</section>

<style>
.nenghui-download-center {
    padding: 60px 0;
    background: #f8f9fa;
}

.nenghui-download-center .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.nenghui-download-center .section-header {
    text-align: center;
    margin-bottom: 50px;
}

.nenghui-download-center .section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin: 0;
    position: relative;
    display: inline-block;
}

.nenghui-download-center .section-title::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, #2cb5a9, #00699f);
    border-radius: 2px;
}

/* 选项卡样式 */
.download-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-button {
    padding: 12px 24px;
    border: 2px solid #e0e0e0;
    background: #fff;
    color: #666;
    font-size: 16px;
    font-weight: 500;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tab-button:hover {
    border-color: #2cb5a9;
    color: #2cb5a9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(44, 181, 169, 0.2);
    transition: all 0.3s ease;
}

.tab-button.active {
    background: linear-gradient(135deg, #2cb5a9, #00699f);
    border-color: #2cb5a9;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(44, 181, 169, 0.3);
}

/* 下载网格布局 */
.download-grid {
    display: none;
    grid-template-columns: repeat(5, 1fr);
    gap: 30px;
    animation: fadeIn 0.5s ease;
}

.download-grid.active {
    display: grid;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 下载卡片样式 */
.download-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid #f0f0f0;
}

.download-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    border-color: #2cb5a9;
    transition: all 0.3s ease;
}

.card-image {
    position: relative;
    overflow: hidden;
    height: 200px;
    background: #f8f9fa;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.download-card:hover .card-image img {
    transform: scale(1.05);
    transition: all 0.3s ease;
}

.card-content {
    padding: 20px;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: #2c3e50;
    margin: 0 0 10px 0;
    line-height: 1.5;
    height: 3em;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    word-wrap: break-word;
    word-break: break-word;
    white-space: normal;
}

.card-excerpt {
    color: #666;
    font-size: 14px;
    line-height: 1.5;
    margin: 0 0 15px 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.file-type,
.file-size {
    padding: 4px 8px;
    background: #f0f8ff;
    color: #2cb5a9;
    font-size: 12px;
    font-weight: 500;
    border-radius: 4px;
    text-transform: uppercase;
}

.download-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: linear-gradient(135deg, #2cb5a9, #00699f);
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    width: 100%;
    justify-content: center;
}

.download-button:hover {
    background: linear-gradient(135deg, #00699f, #2cb5a9);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(44, 181, 169, 0.3);
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
}

.download-icon {
    width: 16px;
    height: 16px;
    filter: brightness(0) invert(1);
}

/* 分页样式 */
.download-pagination {
    margin-top: 40px;
}

.pagination-wrapper {
    display: none;
}

.pagination-wrapper.active {
    display: block;
}

.pagination-nav {
    display: flex;
    justify-content: center;
}

.pagination-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 8px;
    align-items: center;
}

.pagination-item {
    margin: 0;
}

.pagination-item a,
.pagination-item span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 8px 12px;
    border: 1px solid #e0e0e0;
    background: #fff;
    color: #666;
    text-decoration: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.pagination-item a:hover {
    border-color: #2cb5a9;
    background: #2cb5a9;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(44, 181, 169, 0.2);
    transition: all 0.3s ease;
}

.pagination-item .current {
    background: linear-gradient(135deg, #2cb5a9, #00699f);
    border-color: #2cb5a9;
    color: #fff;
    font-weight: 600;
}

.pagination-item .dots {
    border: none;
    background: transparent;
    color: #999;
    cursor: default;
}

.pagination-item .prev,
.pagination-item .next {
    padding: 8px 16px;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pagination-item .prev:hover,
.pagination-item .next:hover {
    background: linear-gradient(135deg, #2cb5a9, #00699f);
    transition: all 0.3s ease;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .download-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 25px;
    }
}

@media (max-width: 992px) {
    .download-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .nenghui-download-center {
        padding: 40px 0;
    }
    
    .nenghui-download-center .container {
        padding: 0 15px;
    }
    
    .nenghui-download-center .section-title {
        font-size: 2rem;
    }
    
    .download-tabs {
        gap: 8px;
        margin-bottom: 30px;
    }
    
    .tab-button {
        padding: 10px 16px;
        font-size: 14px;
    }
    
    .card-content {
        padding: 15px;
    }
    
    .card-title {
        font-size: 0.95rem;
        line-height: 1.4;
        height: 2.8em;
    }
    
    .pagination-item a,
    .pagination-item span {
        min-width: 36px;
        height: 36px;
        padding: 6px 10px;
        font-size: 13px;
    }
    
    .pagination-item .prev,
    .pagination-item .next {
        padding: 6px 12px;
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .download-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .tab-button {
        padding: 8px 12px;
        font-size: 13px;
    }
    
    .pagination-list {
        gap: 4px;
    }
    
    .pagination-item a,
    .pagination-item span {
        min-width: 32px;
        height: 32px;
        padding: 4px 8px;
        font-size: 12px;
    }
    
    .pagination-item .prev,
    .pagination-item .next {
        padding: 4px 8px;
        font-size: 11px;
    }
}
</style>

<script>
document.addEventListener('DOMContentLoaded', function() {
    const tabButtons = document.querySelectorAll('#<?php echo esc_js($block_id); ?> .tab-button');
    const downloadGrids = document.querySelectorAll('#<?php echo esc_js($block_id); ?> .download-grid');
    const paginationWrappers = document.querySelectorAll('#<?php echo esc_js($block_id); ?> .pagination-wrapper');
    
    tabButtons.forEach(button => {
        button.addEventListener('click', function() {
            const category = this.getAttribute('data-category');
            
            // 移除所有活动状态
            tabButtons.forEach(btn => btn.classList.remove('active'));
            downloadGrids.forEach(grid => grid.classList.remove('active'));
            paginationWrappers.forEach(wrapper => wrapper.classList.remove('active'));
            
            // 添加当前活动状态
            this.classList.add('active');
            const targetGrid = document.querySelector('#<?php echo esc_js($block_id); ?> .download-grid[data-category="' + category + '"]');
            if (targetGrid) {
                targetGrid.classList.add('active');
            }
            
            // 显示对应的分页组件
            const targetPagination = document.querySelector('#<?php echo esc_js($block_id); ?> .pagination-wrapper[data-category="' + category + '"]');
            if (targetPagination) {
                targetPagination.classList.add('active');
            }
        });
    });
    
    // 初始化时显示第一个活动选项卡对应的分页
    const activeTab = document.querySelector('#<?php echo esc_js($block_id); ?> .tab-button.active');
    if (activeTab) {
        const category = activeTab.getAttribute('data-category');
        const targetPagination = document.querySelector('#<?php echo esc_js($block_id); ?> .pagination-wrapper[data-category="' + category + '"]');
        if (targetPagination) {
            targetPagination.classList.add('active');
        }
    }
});
</script>