<?php
/**
 * Plugin Name: Asterion — Make Header logo link to home (one-shot)
 * /?av_fix_header_logo=1 → patch element 'hdrlgo' in Bricks template #25
 *   to add link.type=external, link.url=/ so clicking the logo reloads home.
 *
 * Stored in _bricks_page_header_2 (serialized PHP array), and also in
 * _bricks_page_content_2 (JSON) thanks to the dual-format read filter in
 * av-bricks-rest-bridge.php.
 */
defined('ABSPATH') || exit;

add_action('template_redirect', function () {
    if (! in_array($_SERVER['SERVER_NAME'] ?? '', ['localhost', '127.0.0.1'], true)) return;
    if (empty($_GET['av_fix_header_logo'])) return;

    header('Content-Type: text/plain; charset=utf-8');
    global $wpdb;

    $patched = 0;
    foreach (['_bricks_page_content_2', '_bricks_page_header_2'] as $key) {
        $val = $wpdb->get_var($wpdb->prepare(
            "SELECT meta_value FROM {$wpdb->postmeta} WHERE post_id=%d AND meta_key=%s LIMIT 1",
            25, $key
        ));
        if (! is_string($val) || $val === '') {
            echo "  $key : (empty, skip)\n";
            continue;
        }

        $is_json = ($val[0] === '[');
        $elements = $is_json ? json_decode($val, true) : @unserialize($val);
        if (! is_array($elements)) {
            echo "  $key : (not parseable, skip)\n";
            continue;
        }

        $modified = false;
        foreach ($elements as $i => $el) {
            if (($el['id'] ?? '') === 'hdrlgo') {
                $elements[$i]['settings']['link'] = [
                    'type' => 'external',
                    'url'  => '/',
                ];
                $modified = true;
                break;
            }
        }

        if ($modified) {
            $new = $is_json ? wp_json_encode($elements) : maybe_serialize($elements);
            $wpdb->update($wpdb->postmeta, ['meta_value' => $new],
                ['post_id' => 25, 'meta_key' => $key], ['%s'], ['%d', '%s']);
            wp_cache_delete(25, 'post_meta');
            $patched++;
            echo "  $key : hdrlgo patched (link.url=/)\n";
        } else {
            echo "  $key : hdrlgo not found\n";
        }
    }

    echo "\nDONE. $patched meta key(s) patched.\n";
    echo "Reload any page → click 'ASTERION VR' in header → should go to /.\n";
    exit;
});