<?php
/**
 * 便民服务的 meta key 定义与前台读取助手（双语内容、跳转链接、仅校内判定）。
 * 函数名保持与主题历史一致，主题模板与后台按原名调用它们。
 * 抽离自主题 functions.php。
 */

if (!defined('ABSPATH')) {
    exit;
}

function itstudio_get_service_url_meta_key() {
    return '_itstudio_service_url';
}

function itstudio_get_service_title_cn_meta_key() {
    return '_itstudio_service_title_cn';
}

function itstudio_get_service_title_en_meta_key() {
    return '_itstudio_service_title_en';
}

function itstudio_get_service_excerpt_cn_meta_key() {
    return '_itstudio_service_excerpt_cn';
}

function itstudio_get_service_excerpt_en_meta_key() {
    return '_itstudio_service_excerpt_en';
}

function itstudio_get_service_campus_only_meta_key() {
    return '_itstudio_service_campus_only';
}

function itstudio_get_service_category_name_cn_meta_key() {
    return 'itstudio_service_category_name_cn';
}

function itstudio_get_service_category_name_en_meta_key() {
    return 'itstudio_service_category_name_en';
}

function itstudio_get_service_category_i18n_labels($term) {
    if (!$term || is_wp_error($term)) {
        return array(
            'cn' => '未分类',
            'en' => 'Uncategorized',
        );
    }

    $term_id = (int) $term->term_id;
    $name_cn = trim((string) get_term_meta($term_id, itstudio_get_service_category_name_cn_meta_key(), true));
    $name_en = trim((string) get_term_meta($term_id, itstudio_get_service_category_name_en_meta_key(), true));

    if ($name_cn === '') {
        $name_cn = (string) $term->name;
    }
    if ($name_en === '') {
        $name_en = $name_cn;
    }

    return array(
        'cn' => $name_cn,
        'en' => $name_en,
    );
}

function itstudio_get_service_i18n_content($service_id, $excerpt_limit = 90) {
    $service_id = (int) $service_id;
    if ($service_id <= 0) {
        return array(
            'title_cn' => '',
            'title_en' => '',
            'excerpt_cn' => '',
            'excerpt_en' => '',
        );
    }

    $title_cn = trim((string) get_post_meta($service_id, itstudio_get_service_title_cn_meta_key(), true));
    $title_en = trim((string) get_post_meta($service_id, itstudio_get_service_title_en_meta_key(), true));
    $excerpt_cn = trim((string) get_post_meta($service_id, itstudio_get_service_excerpt_cn_meta_key(), true));
    $excerpt_en = trim((string) get_post_meta($service_id, itstudio_get_service_excerpt_en_meta_key(), true));

    $fallback_title = trim((string) get_the_title($service_id));
    if ($fallback_title === '') {
        $fallback_title = '未命名服务';
    }

    $fallback_excerpt = function_exists('itstudio_get_post_excerpt_chars')
        ? itstudio_get_post_excerpt_chars($service_id, $excerpt_limit)
        : wp_html_excerpt(wp_strip_all_tags((string) get_post_field('post_excerpt', $service_id)), $excerpt_limit, '...');
    $fallback_excerpt = trim((string) $fallback_excerpt);
    if ($fallback_excerpt === '') {
        $fallback_excerpt = '暂无简介';
    }

    if ($title_cn === '') {
        $title_cn = $fallback_title;
    }
    if ($title_en === '') {
        $title_en = $title_cn;
    }
    if ($excerpt_cn === '') {
        $excerpt_cn = $fallback_excerpt;
    }
    if ($excerpt_en === '') {
        $excerpt_en = $excerpt_cn;
    }

    return array(
        'title_cn' => $title_cn,
        'title_en' => $title_en,
        'excerpt_cn' => $excerpt_cn,
        'excerpt_en' => $excerpt_en,
    );
}

function itstudio_get_service_target_url($service_id) {
    $service_id = (int) $service_id;
    if ($service_id <= 0) {
        return '';
    }

    $meta_key = itstudio_get_service_url_meta_key();
    $url = (string) get_post_meta($service_id, $meta_key, true);
    if ($url !== '') {
        return $url;
    }

    return (string) get_permalink($service_id);
}

function itstudio_is_service_campus_only($service_id) {
    $service_id = (int) $service_id;
    if ($service_id <= 0) {
        return false;
    }

    return (string) get_post_meta($service_id, itstudio_get_service_campus_only_meta_key(), true) === '1';
}