<?php

declare(strict_types=1);

namespace LIT\MCP\Integrations\Divi\Pages;

use LIT\MCP\Abilities\Annotations;
use LIT\MCP\Integrations\Divi\BlockTree\AttrMap;
use LIT\MCP\Integrations\Divi\Release\DiviFeature;
use WP_Error;

defined('ABSPATH') || exit;

/**
 * lit/divi-duplicate-node: copies a node with everything inside right behind the original
 * (spec §5.7). The copy's admin label gets " (Kopie)"; read-only nodes (global modules,
 * foreign blocks) are copied unchanged, as a whole, byte-identical reference.
 */
final class DiviDuplicateNodeAbility extends DiviWriteAbility
{
    public function name(): string
    {
        return 'lit/divi-duplicate-node';
    }

    public function label(): string
    {
        return 'Divi-Knoten duplizieren';
    }

    public function description(): string
    {
        return 'Dupliziert einen Divi-Knoten samt Inhalt direkt hinter das Original; das Admin-Label der Kopie endet '
            . 'auf „(Kopie)“. tree_rev aus lit-divi-outline ist Pflicht.';
    }

    public function inputSchema(): array
    {
        return [
            'type' => 'object',
            'properties' => array_merge(DiviSchema::write(), [
                'id' => ['type' => 'string', 'description' => 'Pfad-ID des zu duplizierenden Knotens.'],
            ]),
            'required' => ['post_id', 'tree_rev', 'id'],
            'additionalProperties' => false,
        ];
    }

    public function annotations(): array
    {
        return Annotations::write(false);
    }

    public function isDirect(): bool
    {
        return false;
    }

    /** Like lit/divi-move: TreeEditor::duplicate() copies stored bytes, no composition of client values. */
    protected function baseFeatures(): array
    {
        return [DiviFeature::PageRead, DiviFeature::PageWrite, DiviFeature::Catalog, DiviFeature::DesignRead];
    }

    protected function change(DiviPage $page, array $input, DiviComposition $composition): DiviChange|WP_Error
    {
        $id = is_string($input['id'] ?? null) ? $input['id'] : '';
        $node = $page->index->find($id);
        if ($node === null) {
            return DiviErrors::unknownNode($id, $page->post);
        }

        $copy = $composition->editor()->duplicate($page->index, $node);
        if ($copy->isDivi() && ! $copy->isOpaque()) {
            // The raw stored desktop value (never NodeSummary::label()'s display-shortened
            // text): a long or multi-line label must be copied verbatim, only " (Kopie)" added.
            // Setting only the ".desktop.value" leaf keeps every other breakpoint untouched.
            // No client input: the stored label plus a constant suffix, so no choke point (S39).
            $raw = AttrMap::desktop($node->attrs(), 'module.meta.adminLabel');
            $label = is_string($raw) ? $raw : '';
            $copy->setAttrs(AttrMap::set(
                $copy->attrs(),
                'module.meta.adminLabel.desktop.value',
                ($label === '' ? $node->shortName() : $label) . ' (Kopie)'
            ));
        }

        return (new DiviChange(sprintf('Knoten %s dupliziert', $id)))->record($copy, 'duplicated');
    }
}