<?php

namespace Tests\Unit\User\UseCases;

use App\Exceptions\BadRequestException;
use App\Shared\ValueObject\EmailAddress;
use App\User\CreateUserDto;
use App\User\UseCases\SignupUser\SignupUser;
use App\User\UseCases\SignupUser\SignupUserRequest;
use App\User\User;
use DateTimeImmutable;
use DateTimeZone;
use DomainException;
use Tests\Fakes\FakeClock;
use Tests\Fakes\FakeEmailConfirmationTokenRepository;
use Tests\Fakes\FakeEmailer;
use Tests\Fakes\FakeEmailFactory;
use Tests\Fakes\FakeUserRepository;
use Tests\TestCase;

class SignupUserTest extends TestCase
{
    private FakeUserRepository $userRepo;

    private FakeEmailConfirmationTokenRepository $tokenRepo;

    private FakeEmailer $emailer;

    private FakeEmailFactory $emailFactory;

    private FakeClock $clock;

    private DateTimeImmutable $now;

    private SignupUser $useCase;

    protected function setUp(): void
    {
        $this->now = new DateTimeImmutable(
            '2026-05-06T12:00:00',
            new DateTimeZone('UTC'),
        );
        $this->userRepo = new FakeUserRepository;
        $this->tokenRepo = new FakeEmailConfirmationTokenRepository(
            $this->userRepo,
        );
        $this->emailer = new FakeEmailer;
        $this->emailFactory = new FakeEmailFactory;
        $this->clock = new FakeClock($this->now);
        $this->useCase = new SignupUser(
            $this->userRepo,
            $this->tokenRepo,
            $this->emailer,
            $this->emailFactory,
            $this->clock,
            'noreply@tide.test',
        );
    }

    public function test_null_email_throws_bad_request(): void
    {
        $this->expectException(BadRequestException::class);
        $this->useCase->execute(new SignupUserRequest(
            email: null,
            displayName: 'alice',
        ));
    }

    public function test_empty_email_throws_bad_request(): void
    {
        $this->expectException(BadRequestException::class);
        $this->useCase->execute(new SignupUserRequest(
            email: '',
            displayName: 'alice',
        ));
    }

    public function test_invalid_email_format_throws_bad_request(): void
    {
        $this->expectException(BadRequestException::class);
        $this->useCase->execute(new SignupUserRequest(
            email: 'not-an-email',
            displayName: 'alice',
        ));
    }

    public function test_null_display_name_throws_bad_request(): void
    {
        $this->expectException(BadRequestException::class);
        $this->useCase->execute(new SignupUserRequest(
            email: 'user@example.com',
            displayName: null,
        ));
    }

    public function test_short_display_name_throws_bad_request(): void
    {
        $this->expectException(BadRequestException::class);
        $this->useCase->execute(new SignupUserRequest(
            email: 'user@example.com',
            displayName: 'ab',
        ));
    }

    public function test_display_name_with_invalid_chars_throws(): void
    {
        $this->expectException(BadRequestException::class);
        $this->useCase->execute(new SignupUserRequest(
            email: 'user@example.com',
            displayName: 'Has Spaces',
        ));
    }

    public function test_duplicate_email_throws_domain_exception(): void
    {
        $this->userRepo->create(new CreateUserDto(
            email: new EmailAddress('user@example.com'),
            displayName: 'first',
            passwordHash: '',
            isAdmin: false,
            emailConfirmedAt: null,
        ));

        $this->expectException(DomainException::class);
        $this->useCase->execute(new SignupUserRequest(
            email: 'user@example.com',
            displayName: 'second',
        ));
    }

    public function test_duplicate_display_name_throws_domain_exception(): void
    {
        $this->userRepo->create(new CreateUserDto(
            email: new EmailAddress('first@example.com'),
            displayName: 'taken',
            passwordHash: '',
            isAdmin: false,
            emailConfirmedAt: null,
        ));

        $this->expectException(DomainException::class);
        $this->useCase->execute(new SignupUserRequest(
            email: 'second@example.com',
            displayName: 'taken',
        ));
    }

    public function test_valid_signup_creates_unconfirmed_user(): void
    {
        $created = $this->useCase->execute(new SignupUserRequest(
            email: 'new@example.com',
            displayName: 'newuser',
        ));

        $this->assertInstanceOf(User::class, $created);
        $this->assertSame('new@example.com', $created->getEmail()->value());
        $this->assertSame('newuser', $created->getDisplayName());
        $this->assertSame('', $created->getPasswordHash());
        $this->assertFalse($created->isAdmin());
        $this->assertFalse($created->isEmailConfirmed());
    }

    public function test_valid_signup_creates_confirmation_token(): void
    {
        $created = $this->useCase->execute(new SignupUserRequest(
            email: 'new@example.com',
            displayName: 'newuser',
        ));

        $token = $this->tokenRepo->findByUser($created);
        $this->assertNotNull($token);
        $this->assertGreaterThan($this->now, $token->getAvailableTo());
    }

    public function test_valid_signup_sends_confirmation_email(): void
    {
        $this->useCase->execute(new SignupUserRequest(
            email: 'new@example.com',
            displayName: 'newuser',
        ));

        $this->assertSame(1, $this->emailer->getNumberOfEmailsSent());
        $sent = $this->emailer->getSentEmails()[0];
        $this->assertSame('noreply@tide.test', $sent['from']);
        $this->assertSame('new@example.com', $sent['to']);
        $this->assertStringContainsString('confirm:', $sent['body']);
    }

    public function test_signup_normalizes_email_domain(): void
    {
        $created = $this->useCase->execute(new SignupUserRequest(
            email: 'Mixed@CASE.com',
            displayName: 'mixed',
        ));

        $this->assertSame('Mixed@case.com', $created->getEmail()->value());
    }
}