// ——————————
// 1. Add Meta Boxes for Product
// ——————————
add_action(‘add_meta_boxes’,‘wc_ai_add_meta_boxes’);
function wc_ai_add_meta_boxes(){
add_meta_box(‘wc_ai_meta’,‘AI Visibility’,‘wc_ai_meta_box_callback’,‘product’,‘normal’,‘high’);
}

function wc_ai_meta_box_callback($post){
wp_nonce_field(‘wc_ai_save_meta’,‘wc_ai_meta_nonce’);

$brand = get_post_meta($post->ID,‘wc_ai_brand’,true);
$slots = get_post_meta($post->ID,‘wc_ai_slots’,true);
$answers = get_post_meta($post->ID,‘wc_ai_answers’,true);
$faqs = get_post_meta($post->ID,‘wc_ai_faqs’,true);

?>
<p><label>Brand Name:</label><br>
<input type=“text” name=“wc_ai_brand” value=“<?php echo esc_attr($brand); ?>” style=“width:100%;”></p>

<p><label>Semantic Slots (one per line):</label><br>
<textarea name=“wc_ai_slots” rows=“5” style=“width:100%;”><?php echo esc_textarea($slots); ?></textarea></p>

<p><label>Answer Nodes / Scenarios (one per line):</label><br>
<textarea name=“wc_ai_answers” rows=“8” style=“width:100%;”><?php echo esc_textarea($answers); ?></textarea></p>

<p><label>FAQ (format: Question | Answer, one per line):</label><br>
<textarea name=“wc_ai_faqs” rows=“8” style=“width:100%;”><?php echo esc_textarea($faqs); ?></textarea></p>
<?php
}

// ——————————
// 2. Save Meta Box
// ——————————
add_action(‘save_post’,‘wc_ai_save_meta’);
function wc_ai_save_meta($post_id){
if(!isset($_POST[‘wc_ai_meta_nonce’]) || !wp_verify_nonce($_POST[‘wc_ai_meta_nonce’],‘wc_ai_save_meta’)) return;

update_post_meta($post_id,‘wc_ai_brand’,sanitize_text_field($_POST[‘wc_ai_brand’]));
update_post_meta($post_id,‘wc_ai_slots’,sanitize_textarea_field($_POST[‘wc_ai_slots’]));
update_post_meta($post_id,‘wc_ai_answers’,sanitize_textarea_field($_POST[‘wc_ai_answers’]));
update_post_meta($post_id,‘wc_ai_faqs’,sanitize_textarea_field($_POST[‘wc_ai_faqs’]));
}

// ——————————
// 3. Frontend Output Functions
// ——————————
function wc_ai_brand_entity_meta(){
global $product;
$brand = get_post_meta($product->get_id(),‘wc_ai_brand’,true);
if(!$brand) return;
echo ‘<div class=”ai-brand-entity” itemscope itemtype=”https://schema.org/Brand”>’;
echo ‘<meta itemprop=”name” content=”‘.esc_attr($brand).‘”>’;
echo ‘</div>’;
}

function wc_ai_semantic_slot_meta(){
global $product;
$slots = get_post_meta($product->get_id(),‘wc_ai_slots’,true);
if(!$slots) return;

echo ‘<div class=”ai-semantic-slot”>’;
$lines = explode(“\n”,$slots);
foreach($lines as $slot){
$slot = trim($slot);
if($slot){
echo ‘<div itemscope itemtype=”https://schema.org/DefinedTerm”>’;
echo ‘<meta itemprop=”description” content=”‘.esc_attr($slot).‘”>’;
echo ‘</div>’;
}
}
echo ‘</div>’;
}

function wc_ai_answer_surface_meta(){
global $product;
$answers = get_post_meta($product->get_id(),‘wc_ai_answers’,true);
if(!$answers) return;

echo ‘<div class=”ai-answer-surface” itemscope itemtype=”https://schema.org/ItemList”>’;
$lines = explode(“\n”,$answers);
foreach($lines as $ans){
$ans = trim($ans);
if($ans){
echo ‘<div itemprop=”itemListElement” itemscope itemtype=”https://schema.org/DefinedTerm”>’;
echo ‘<meta itemprop=”name” content=”‘.esc_attr($product->get_name()).‘”>’;
echo ‘<meta itemprop=”description” content=”‘.esc_attr($ans).‘”>’;
echo ‘</div>’;
}
}
echo ‘</div>’;
}

function wc_ai_faq_meta(){
global $product;
$faqs = get_post_meta($product->get_id(),‘wc_ai_faqs’,true);
if(!$faqs) return;

echo ‘<div itemscope itemtype=”https://schema.org/FAQPage”>’;
$lines = explode(“\n”,$faqs);
foreach($lines as $line){
$line = trim($line);
if($line && strpos($line,‘|’)!==false){
list($q,$a) = explode(‘|’,$line,2);
echo ‘<div itemscope itemprop=”mainEntity” itemtype=”https://schema.org/Question”>’;
echo ‘<h3 itemprop=”name”>’.esc_html(trim($q)).‘</h3>’;
echo ‘<div itemscope itemprop=”acceptedAnswer” itemtype=”https://schema.org/Answer”>’;
echo ‘<p itemprop=”text”>’.esc_html(trim($a)).‘</p>’;
echo ‘</div></div>’;
}
}
echo ‘</div>’;
}

// ——————————
// 4. Hook All Frontend Outputs
// ——————————
add_action(‘woocommerce_single_product_summary’,‘wc_ai_product_entity’,5);
add_action(‘woocommerce_single_product_summary’,‘wc_ai_summary_block’,15);
add_action(‘woocommerce_single_product_summary’,‘wc_ai_brand_entity_meta’,20);
add_action(‘woocommerce_single_product_summary’,‘wc_ai_all_tag_entities’,25);
add_action(‘woocommerce_single_product_summary’,‘wc_ai_semantic_slot_meta’,30);
add_action(‘woocommerce_single_product_summary’,‘wc_ai_answer_surface_meta’,35);
add_action(‘woocommerce_after_single_product_summary’,‘wc_ai_cross_entity_block’,15);
add_action(‘woocommerce_single_product_summary’,‘wc_ai_faq_meta’,50);
?>