<?php

declare(strict_types=1);

namespace LIT\MCP\Integrations\Divi\Pages;

use LIT\MCP\Abilities\Rev;
use LIT\MCP\Integrations\Divi\BlockTree\Document;
use LIT\MCP\Integrations\Divi\BlockTree\NodeIndex;
use WP_Post;

/**
 * An entry loaded for the Divi tools: the post, its parsed tree, the path index and the
 * tree_rev (hash of post_content – the optimistic lock of the Divi tools, ruling P16; the
 * post-level lock stays `rev` = Rev::ofPost()).
 */
final class DiviPage
{
    public function __construct(
        public readonly WP_Post $post,
        public readonly Document $document,
        public readonly NodeIndex $index
    ) {
    }

    public function treeRev(): string
    {
        return Rev::of((string) $this->post->post_content);
    }

    /** Whether post_content is a Divi 5 layout (or empty, so a first section can be added). */
    public function isDiviLayout(): bool
    {
        $content = (string) $this->post->post_content;

        return trim($content) === '' || str_contains($content, '<!-- wp:divi/');
    }

    public function editUrl(): string
    {
        return (string) add_query_arg('et_fb', '1', (string) get_permalink($this->post));
    }
}