<?php

namespace App\Post;

use DateTimeImmutable;
use DateTimeZone;

class EloquentPostRepository implements PostRepository
{
    public function create(CreatePostDto $dto): Post
    {
        $model = PostModel::create([
            'user_id' => $dto->userId,
            'title' => $dto->title,
            'body' => $dto->body,
            'created_at' => $dto->createdAt,
        ]);

        return $this->toDomain($model);
    }

    public function find(int $id): ?Post
    {
        $model = PostModel::find($id);

        return $model === null ? null : $this->toDomain($model);
    }

    /**
     * @return Post[]
     */
    public function findByUserId(int $userId): array
    {
        $models = PostModel::query()
            ->where('user_id', $userId)
            ->orderBy('created_at', 'desc')
            ->get();

        return $models->map(
            function (PostModel $model) {
                return $this->toDomain($model);
            },
        )->all();
    }

    /**
     * @return Post[]
     */
    public function findRecent(int $limit): array
    {
        $models = PostModel::query()
            ->orderBy('created_at', 'desc')
            ->limit($limit)
            ->get();

        return $models->map(
            function (PostModel $model) {
                return $this->toDomain($model);
            },
        )->all();
    }

    public function delete(int $id): void
    {
        PostModel::query()->where('id', $id)->delete();
    }

    private function toDomain(PostModel $model): Post
    {
        $utc = new DateTimeZone('UTC');

        return new Post(
            id: $model->id,
            userId: $model->user_id,
            title: $model->title,
            body: $model->body,
            createdAt: new DateTimeImmutable(
                $model->created_at->toDateTimeString(),
                $utc,
            ),
        );
    }
}