<?php

namespace App\Node\UseCases;

use App\Node\Node;
use App\Node\CreateNodeDto;
use App\Node\NodeRepository;
use App\Text\TextRepository;
use DomainException;

class CreateNode
{
    public function __construct(
        private NodeRepository $nodeRepo,
        private TextRepository $textRepo,
    ) {}

    public function execute(CreateNodeRequest $request): Node
    {
        $textId = $request->textId;
        $text = $this->textRepo->find($textId);
        if ($text === null) {
            throw new DomainException("Text with id: $textId doesnt exist");
        }
        if ($request->parentNodeId === null) {
            return $this->nodeRepo->create(new CreateNodeDto(
                text: $text,
                title: $request->title,
                parentNode: null,
            ));
        }
        $parentNodeId = $request->parentNodeId;
        $parentNode = $this->nodeRepo->find($parentNodeId);
        if ($parentNode === null) {
            throw new DomainException("Node with id: $parentNodeId doesnt exist");
        }

        return $this->nodeRepo->create(new CreateNodeDto(
            text: $text,
            title: $request->title,
            parentNode: $parentNode,
        ));
    }
}