<?php
if (!defined('ABSPATH')) {
    exit;
}

function gx_theme_setup() {
    add_theme_support('title-tag');
    add_theme_support('post-thumbnails');
    add_theme_support('html5', array('search-form', 'comment-form', 'comment-list', 'gallery', 'caption', 'style', 'script'));
    add_theme_support('custom-logo', array('height' => 80, 'width' => 80, 'flex-height' => true, 'flex-width' => true));
    add_theme_support('align-wide');
    add_theme_support('responsive-embeds');

    register_nav_menus(array(
        'primary' => __('主导航菜单', 'gongxue'),
    ));
}
add_action('after_setup_theme', 'gx_theme_setup');

function gx_enqueue_assets() {
    $theme_dir = get_template_directory();
    $theme_uri = get_template_directory_uri();
    wp_enqueue_script('tailwindcss', 'https://cdn.tailwindcss.com', array(), '3.4', false);
    wp_add_inline_script('tailwindcss', 'tailwind.config={theme:{extend:{colors:{"apple-grey":"#F5F5F7","apple-dark":"#1D1D1F","apple-blue":"#0071E3","apple-blue-hover":"#0077ED","apple-text-gray":"#86868B"},animation:{"fade-in":"fadeIn .6s ease-out forwards","slide-up":"slideUp .6s ease-out forwards","slide-down":"slideDown .4s ease-out forwards"},keyframes:{fadeIn:{"0%":{opacity:"0"},"100%":{opacity:"1"}},slideUp:{"0%":{opacity:"0",transform:"translateY(20px)"},"100%":{opacity:"1",transform:"translateY(0)"}},slideDown:{"0%":{opacity:"0",transform:"translateY(-10px)"},"100%":{opacity:"1",transform:"translateY(0)"}}}}}};');
    wp_enqueue_style('gx-style', $theme_uri . '/assets/css/main.css', array(), filemtime($theme_dir . '/assets/css/main.css'));
    wp_enqueue_style('gx-fonts', 'https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&display=swap', array(), null);
    wp_enqueue_script('gx-main', $theme_uri . '/assets/js/main.js', array(), filemtime($theme_dir . '/assets/js/main.js'), true);
    if (is_singular() && comments_open() && get_option('thread_comments')) {
        wp_enqueue_script('comment-reply');
    }
}
add_action('wp_enqueue_scripts', 'gx_enqueue_assets');

function gx_knowledge_url() {
    $page_id = get_option('page_for_posts');
    return $page_id ? get_permalink($page_id) : home_url('/knowledge/');
}

function gx_linked_page_item($page, $fallback_label, $active = false) {
    if (!$page || is_wp_error($page)) {
        return array(
            'label' => $fallback_label,
            'url' => home_url('/'),
            'active' => $active,
        );
    }
    return array(
        'label' => get_the_title($page),
        'url' => get_permalink($page),
        'active' => $active,
    );
}

function gx_primary_nav_items() {
    $front_page = get_post((int) get_option('page_on_front'));
    $knowledge_page = get_post((int) get_option('page_for_posts'));
    $question_bank = get_page_by_path('question-bank', OBJECT, 'page');
    $online_school = get_page_by_path('online-school', OBJECT, 'page');
    $books_page = get_page_by_path('books', OBJECT, 'page');

    return array_filter(array(
        gx_linked_page_item($front_page, __('首页', 'gongxue'), is_front_page()),
        gx_linked_page_item($question_bank, __('刷题题库', 'gongxue'), is_page('question-bank')),
        gx_linked_page_item($online_school, __('在线网校', 'gongxue'), is_page('online-school')),
        gx_linked_page_item($books_page, __('出版书籍', 'gongxue'), is_page('books')),
        gx_linked_page_item($knowledge_page, __('知识库', 'gongxue'), is_home() || is_archive() || is_single()),
    ));
}

function gx_format_views($count) {
    $count = intval($count);
    if ($count >= 10000) return round($count / 10000, 1) . 'w+';
    if ($count >= 1000) return round($count / 1000, 1) . 'k';
    return (string) $count;
}

function gx_get_views($post_id = null) {
    $post_id = $post_id ?: get_the_ID();
    return intval(get_post_meta($post_id, '_gx_view_count', true));
}

function gx_inc_views() {
    if (is_admin() || wp_doing_ajax() || wp_doing_cron() || is_feed() || !is_singular('post')) {
        return;
    }
    $id = get_queried_object_id();
    if (!$id) return;
    $count = gx_get_views($id) + 1;
    update_post_meta($id, '_gx_view_count', $count);
}
add_action('template_redirect', 'gx_inc_views');

function gx_pagination() {
    global $wp_query;
    $links = paginate_links(array(
        'total' => $wp_query->max_num_pages,
        'current' => max(1, get_query_var('paged')),
        'type' => 'array',
        'prev_text' => '‹',
        'next_text' => '›',
    ));
    if (!$links) return;
    echo '<div class="flex justify-center mt-12"><nav class="flex items-center gap-2">';
    foreach ($links as $link) {
        $active = strpos($link, 'current') !== false;
        echo '<span class="' . ($active ? 'px-4 py-2 bg-apple-blue text-white rounded-full text-sm' : 'px-4 py-2 text-gray-500 hover:text-apple-dark hover:bg-gray-100 rounded-full text-sm') . '">' . $link . '</span>';
    }
    echo '</nav></div>';
}

function gx_excerpt_len($len) { return 30; }
add_filter('excerpt_length', 'gx_excerpt_len');

function gx_excerpt_more($more) { return '...'; }
add_filter('excerpt_more', 'gx_excerpt_more');

function gx_register_sidebars() {
    register_sidebar(array(
        'name' => __('知识库侧边栏', 'gongxue'),
        'id' => 'knowledge-sidebar',
        'before_widget' => '<div class="bg-white p-6 rounded-2xl shadow-sm mb-4">',
        'after_widget' => '</div>',
        'before_title' => '<h3 class="text-lg font-bold text-apple-dark mb-4">',
        'after_title' => '</h3>',
    ));
}
add_action('widgets_init', 'gx_register_sidebars');

remove_action('wp_head', 'wp_generator');
remove_action('wp_head', 'rsd_link');
remove_action('wp_head', 'wlwmanifest_link');
remove_action('wp_head', 'rest_output_link_wp_head');
remove_action('wp_head', 'wp_oembed_add_discovery_links');
remove_action('wp_head', 'wp_shortlink_wp_head');

function gx_allow_svg($mimes) {
    $mimes['svg'] = 'image/svg+xml';
    return $mimes;
}
add_filter('upload_mimes', 'gx_allow_svg');

function gx_seo_description() {
    if (is_singular()) {
        $excerpt = trim(wp_strip_all_tags(get_the_excerpt()));
        if ($excerpt) {
            return $excerpt;
        }
        $content = wp_strip_all_tags(get_the_content());
        return wp_trim_words($content, 28, '');
    }
    if (is_home()) {
        $page_id = get_option('page_for_posts');
        if ($page_id) {
            $excerpt = trim(wp_strip_all_tags(get_post_field('post_excerpt', $page_id)));
            if ($excerpt) return $excerpt;
        }
        return get_bloginfo('description');
    }
    if (is_front_page()) {
        return '赋能未来，让升本更简单。恭学教育提供天津专升本刷题题库、在线网校、出版书籍与知识库服务。';
    }
    if (is_category() || is_tag()) {
        $term = get_queried_object();
        if ($term && !is_wp_error($term) && !empty($term->description)) {
            return wp_strip_all_tags($term->description);
        }
    }
    return get_bloginfo('description');
}

function gx_seo_title() {
    if (is_front_page()) {
        return '恭学教育 - 天津专升本培训领军品牌 | 刷题题库 | 在线网校 | 出版书籍';
    }
    if (is_home()) {
        return '知识库 - 天津专升本百科全书';
    }
    if (is_category()) {
        $term = get_queried_object();
        return ($term && !is_wp_error($term)) ? $term->name . ' - 知识库' : '知识库';
    }
    if (is_tag()) {
        $term = get_queried_object();
        return ($term && !is_wp_error($term)) ? '#' . $term->name . ' - 知识库' : '知识库';
    }
    if (is_singular('post')) {
        return get_the_title() . ' - 知识库';
    }
    if (is_page()) {
        return get_the_title();
    }
    return wp_get_document_title();
}

function gx_seo_image() {
    if (is_singular() && has_post_thumbnail()) {
        $image = get_the_post_thumbnail_url(null, 'full');
        if ($image) return $image;
    }
    $cfg = gx_asset_config();
    return $cfg['hero_video_cover'];
}

function gx_output_seo_meta() {
    if (is_admin()) return;
    $title = gx_seo_title();
    $desc = gx_seo_description();
    $image = gx_seo_image();
    $url = is_singular() ? get_permalink() : (is_home() ? gx_knowledge_url() : (is_front_page() ? home_url('/') : home_url(add_query_arg(array(), $GLOBALS['wp']->request ?? ''))));
    echo '<meta name="description" content="' . esc_attr($desc) . '">' . "\n";
    echo '<meta name="keywords" content="' . esc_attr(get_bloginfo('name') . ',天津专升本,恭学教育,刷题题库,在线网校,出版书籍,知识库') . '">' . "\n";
    echo '<meta property="og:title" content="' . esc_attr($title) . '">' . "\n";
    echo '<meta property="og:description" content="' . esc_attr($desc) . '">' . "\n";
    echo '<meta property="og:url" content="' . esc_url($url) . '">' . "\n";
    echo '<meta property="og:type" content="' . esc_attr(is_singular() ? 'article' : 'website') . '">' . "\n";
    echo '<meta property="og:image" content="' . esc_url($image) . '">' . "\n";
    echo '<meta name="twitter:card" content="summary_large_image">' . "\n";
    echo '<meta name="twitter:title" content="' . esc_attr($title) . '">' . "\n";
    echo '<meta name="twitter:description" content="' . esc_attr($desc) . '">' . "\n";
    echo '<meta name="twitter:image" content="' . esc_url($image) . '">' . "\n";
    echo '<link rel="canonical" href="' . esc_url($url) . '">' . "\n";
    if (is_singular('post')) {
        $author = get_the_author();
        $date = get_the_date('c');
        $headline = get_the_title();
        $article = array(
            '@context' => 'https://schema.org',
            '@type' => 'Article',
            'headline' => $headline,
            'description' => $desc,
            'author' => array('@type' => 'Person', 'name' => $author),
            'datePublished' => $date,
            'dateModified' => get_the_modified_date('c'),
            'mainEntityOfPage' => $url,
            'image' => array($image),
            'publisher' => array('@type' => 'Organization', 'name' => get_bloginfo('name')),
        );
        echo '<script type="application/ld+json">' . wp_json_encode($article, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES) . '</script>' . "\n";
    }
}
add_action('wp_head', 'gx_output_seo_meta', 1);

function gx_asset_config() {
    return array(
        'hero_video_url' => 'https://fenxiang-1304851894.cos.ap-nanjing.myqcloud.com/%E6%81%AD%E5%AD%A6%E6%95%99%E8%82%B2%E5%93%81%E7%89%8C%E5%AE%A3%E4%BC%A0.mp4',
        'hero_video_cover' => 'https://fenxiang-1304851894.cos.ap-nanjing.myqcloud.com/%E5%B0%81%E9%9D%A2.png',
        'question_bank_mockup' => 'https://fenxiang-1304851894.cos.ap-nanjing.myqcloud.com/tikudemo-tuya.webp',
        'online_school_mockup' => 'https://fenxiang-1304851894.cos.ap-nanjing.myqcloud.com/wangkedemo-tuya.webp',
        'customer_service_qrcode' => get_template_directory_uri() . '/assets/images/customer-service-qrcode.jpg',
        'stats' => array('years' => 7, 'students' => '21W+', 'coverage' => '100%', 'schools' => 12),
        'books' => array(
            array('title' => '天津专升本数学自学参考书', 'price' => '128.00', 'old' => '168.00', 'image' => 'https://fenxiang-1304851894.cos.ap-nanjing.myqcloud.com/%E6%95%B0%E5%AD%A61-tuya.webp', 'tag' => '畅销榜第一'),
            array('title' => '天津专升本语文自学参考书', 'price' => '128.00', 'old' => '168.00', 'image' => 'https://fenxiang-1304851894.cos.ap-nanjing.myqcloud.com/%E8%AF%AD%E6%96%871-tuya.webp', 'tag' => '新书首发'),
            array('title' => '天津专升本英语自学参考书', 'price' => '128.00', 'old' => '168.00', 'image' => 'https://fenxiang-1304851894.cos.ap-nanjing.myqcloud.com/%E8%8B%B1%E8%AF%AD1-tuya.webp', 'tag' => '热销'),
            array('title' => '天津专升本计算机自学参考书', 'price' => '128.00', 'old' => '168.00', 'image' => 'https://fenxiang-1304851894.cos.ap-nanjing.myqcloud.com/%E8%AE%A1%E7%AE%97%E6%9C%BA%E5%80%92%E5%BD%B1-tuya.webp', 'tag' => '必刷'),
            array('title' => '三年模拟一年升本刷题系列套装', 'price' => '128.00', 'old' => '198.00', 'image' => 'https://fenxiang-1304851894.cos.ap-nanjing.myqcloud.com/%E4%B8%89%E4%B8%80-tuya.webp', 'tag' => '限时优惠'),
        ),
        'team' => array(
            array('name' => '陈奕静老师', 'role' => '七年专业课教龄王牌老师', 'avatar' => 'https://fenxiang-1304851894.cos.ap-nanjing.myqcloud.com/%E9%99%88%E5%A5%95%E9%9D%99-tuya.webp'),
            array('name' => '郭馨老师', 'role' => '七年专业课教龄王牌老师', 'avatar' => 'https://fenxiang-1304851894.cos.ap-nanjing.myqcloud.com/%E9%83%AD%E9%A6%A8%20%282%29-%E8%AE%A1%E7%AE%97%E6%9C%BA-tuya.webp'),
            array('name' => '师哲老师', 'role' => '教学总监', 'avatar' => 'https://fenxiang-1304851894.cos.ap-nanjing.myqcloud.com/%E5%B8%88%E5%93%B22-tuya.webp'),
            array('name' => '王沐妍老师', 'role' => '七年专业课教龄王牌老师', 'avatar' => 'https://fenxiang-1304851894.cos.ap-nanjing.myqcloud.com/%E7%8E%8B%E6%B2%90%E5%A6%8D-tuya.webp'),
        ),
    );
}

function gx_phone_mockup($image, $class = '') {
    ?>
    <div class="gx-phone <?php echo esc_attr($class); ?>">
        <div class="gx-phone-frame">
            <div class="gx-phone-screen">
                <div class="gx-phone-island"></div>
                <img src="<?php echo esc_url($image); ?>" alt="App Screen" loading="lazy">
                <div class="gx-phone-home"></div>
            </div>
        </div>
    </div>
    <?php
}