<?php

namespace App\Set\UseCases\UpdateSet;

use App\Exceptions\BadRequestException;
use App\Exceptions\NotFoundException;
use App\Set\Set;
use App\Set\SetRepository;

class UpdateSet
{
    public function __construct(
        private UpdateName $updateName,
        private UpdateDescription $updateDescription,
        private UpdateIconImage $updateIconImage,
        private SetRepository $setRepository,
    ) {
    }

    /**
     * @throws BadRequestException
     * @throws NotFoundException
     */
    public function execute(UpdateSetRequest $request): Set
    {
        if ($request->id === null) {
            throw new BadRequestException('setId is required');
        }

        if ($this->hasNoFields($request)) {
            throw new BadRequestException('nothing to update');
        }

        if ($request->name !== null) {
            $this->updateName->execute(new UpdateNameRequest(
                id: $request->id,
                name: $request->name,
            ));
        }
        if ($request->description !== null) {
            $this->updateDescription->execute(new UpdateDescriptionRequest(
                id: $request->id,
                description: $request->description,
            ));
        }
        if ($this->hasIconImageInput($request)) {
            $this->updateIconImage->execute(new UpdateIconImageRequest(
                id: $request->id,
                fileContents: $request->iconImageContents,
                fileOriginalName: $request->iconImageOriginalName,
                fileMimeType: $request->iconImageMimeType,
                fileSizeBytes: $request->iconImageSizeBytes,
            ));
        }

        $set = $this->setRepository->find($request->id);
        if ($set === null) {
            throw new NotFoundException('Set not found');
        }

        return $set;
    }

    private function hasNoFields(UpdateSetRequest $request): bool
    {
        return $request->name === null
            && $request->description === null
            && ! $this->hasIconImageInput($request);
    }

    private function hasIconImageInput(UpdateSetRequest $request): bool
    {
        return $request->iconImageContents !== null
            || $request->iconImageOriginalName !== null
            || $request->iconImageMimeType !== null
            || $request->iconImageSizeBytes !== null;
    }
}