<?php

namespace App\User\UseCases\SignupUser;

use App\Email\EmailConfirmationToken\UseCases\CreateEmailConfirmationToken;
use App\Email\EmailConfirmationToken\UseCases\CreateEmailConfirmationTokenRequest;
use App\Email\Emailer;
use App\Email\EmailFactory;
use App\Exceptions\BadRequestException;
use App\Shared\ValueObject\EmailAddress;
use App\User\CreateUserDto;
use App\User\User;
use App\User\UserRepository;
use DomainException;
use InvalidArgumentException;

class SignupUser
{
    public function __construct(
        private UserRepository $userRepository,
        private CreateEmailConfirmationToken $createToken,
        private Emailer $emailer,
        private EmailFactory $emailFactory,
    ) {}

    /**
     * @throws BadRequestException
     * @throws DomainException
     */
    public function execute(SignupUserRequest $request): void
    {
        if ($request->email === null || trim($request->email) === '') {
            throw new BadRequestException('email is required');
        }

        try {
            $email = new EmailAddress($request->email);
        } catch (InvalidArgumentException) {
            throw new BadRequestException('email must be valid');
        }

        $user = $this->findOrCreatePendingUser($email);
        $token = $this->createToken->execute(
            new CreateEmailConfirmationTokenRequest(
                user: $user,
                minuteOffset: 10,
            ),
        );
        $body = $this->emailFactory->makeConfirmationEmail(
            $token->getToken(),
        );
        $this->emailer->send(
            $user->getEmail(),
            'Confirm your Attainly email',
            $body,
        );
    }

    /**
     * @throws DomainException
     */
    private function findOrCreatePendingUser(EmailAddress $email): User
    {
        $user = $this->userRepository->findByEmail($email);
        if ($user === null) {
            return $this->userRepository->create(new CreateUserDto(
                email: $email,
                passwordHash: null,
            ));
        }
        if ($user->getPasswordHash() !== null) {
            throw new DomainException(
                "{$email->value()} already has an account",
            );
        }

        return $user;
    }
}