<?php

namespace Tests\Fakes;

use App\Comment\Comment;
use App\Comment\CommentRepository;
use App\Comment\CreateCommentDto;

class FakeCommentRepository implements CommentRepository
{
    /**
     * @var Comment[]
     */
    private array $existingComments = [];

    public function create(CreateCommentDto $dto): Comment
    {
        $id = $this->getNextId();
        $comment = new Comment(
            id: $id,
            postId: $dto->postId,
            userId: $dto->userId,
            body: $dto->body,
            createdAt: $dto->createdAt,
        );
        $this->existingComments[$id] = $comment;

        return $this->copy($comment);
    }

    public function find(int $id): ?Comment
    {
        $comment = $this->existingComments[$id] ?? null;
        if ($comment === null) {
            return null;
        }

        return $this->copy($comment);
    }

    /**
     * @return Comment[]
     */
    public function findByPostId(int $postId): array
    {
        $matching = [];
        foreach ($this->existingComments as $comment) {
            if ($comment->getPostId() === $postId) {
                $matching[] = $this->copy($comment);
            }
        }
        usort(
            $matching,
            function (Comment $left, Comment $right) {
                return $left->getCreatedAt() <=> $right->getCreatedAt();
            },
        );

        return $matching;
    }

    public function delete(int $id): void
    {
        unset($this->existingComments[$id]);
    }

    private function copy(Comment $comment): Comment
    {
        return new Comment(
            id: $comment->getId(),
            postId: $comment->getPostId(),
            userId: $comment->getUserId(),
            body: $comment->getBody(),
            createdAt: $comment->getCreatedAt(),
        );
    }

    private function getNextId(): int
    {
        return count($this->existingComments) + 1;
    }
}