<?php
/** Conservative shared-render invalidation, coalesced once per native request. */
if (!defined('ABSPATH')) { exit; }

final class Chat4U_Dependencies {
    private static bool $marked = false;

    public static function revision(): string { return (string) get_option('chat4u_render_revision', ''); }

    public static function changed(int $id): void {
        $post = get_post($id);
        if (!$post || wp_is_post_revision($id)) { return; }
        if (in_array($post->post_type, ['wp_block', 'wp_template', 'wp_template_part', 'wp_navigation',
            'elementor_library', 'et_pb_layout'], true)) { self::mark(); }
    }

    public static function metadata($meta_id, int $id): void { self::changed($id); }

    public static function term(int $id, int $taxonomy_id, string $taxonomy): void {
        $object = get_taxonomy($taxonomy);
        if ($object && $object->public) { self::mark(); }
    }

    public static function mark(): void {
        if (self::$marked) { return; }
        self::$marked = true;
        // No parent query, render or network work runs inside a WordPress save.
        // The changed profile makes SaaS perform its existing keyset scan. A
        // global revision is conservative when a builder hides its dependency
        // graph; unchanged rendered text reuses its existing embeddings.
        update_option('chat4u_render_revision', wp_generate_uuid4(), false);
        Chat4U_Changes::render_changed();
    }
}