<?php

declare(strict_types=1);

namespace Tests;

/**
 * There is no register/login pair -- POST /api/auth/magic-link is the only way
 * in, for both a brand-new address and a returning one.
 */
final class AuthTest extends ApiTestCase
{
    public function test_a_magic_link_request_always_responds_202(): void
    {
        $response = $this->request('POST', '/api/auth/magic-link', ['email' => 'ada@example.com']);

        self::assertSame(202, $response->getStatusCode());
    }

    public function test_a_magic_link_request_validates_the_address(): void
    {
        $response = $this->request('POST', '/api/auth/magic-link', ['email' => 'not-an-email']);

        self::assertSame(422, $response->getStatusCode());
        self::assertArrayHasKey('email', $this->decode($response)['error']['details']);
    }

    public function test_opening_the_link_creates_the_account_and_signs_in(): void
    {
        $this->request('POST', '/api/auth/magic-link', ['email' => 'Ada@example.com']);

        $response = $this->request('POST', '/api/auth/verify-email', ['token' => $this->tokenFromEmail()]);

        self::assertSame(200, $response->getStatusCode());
        $body = $this->decode($response);
        self::assertSame('ada@example.com', $body['user']['email']);
        self::assertTrue($body['user']['email_verified']);
        self::assertNotNull($body['user']['email_verified_at']);
        self::assertNull($body['user']['pending_email']);
        self::assertArrayNotHasKey('password', $body['user']);
        self::assertArrayNotHasKey('password_hash', $body['user']);
        self::assertNotEmpty($body['token']);
    }

    public function test_a_second_request_signs_in_the_same_account(): void
    {
        $this->request('POST', '/api/auth/magic-link', ['email' => 'ada@example.com']);
        $firstId = $this->decode(
            $this->request('POST', '/api/auth/verify-email', ['token' => $this->tokenFromEmail()]),
        )['user']['id'];

        $this->db()->prepare('UPDATE users SET verification_email_sent_at = NULL WHERE email = :e')
            ->execute(['e' => 'ada@example.com']);
        $this->request('POST', '/api/auth/magic-link', ['email' => 'ADA@EXAMPLE.COM']);
        $secondId = $this->decode(
            $this->request('POST', '/api/auth/verify-email', ['token' => $this->tokenFromEmail()]),
        )['user']['id'];

        self::assertSame($firstId, $secondId);
    }

    public function test_the_link_is_not_sent_again_within_the_resend_interval(): void
    {
        $this->request('POST', '/api/auth/magic-link', ['email' => 'ada@example.com']);

        $response = $this->request('POST', '/api/auth/magic-link', ['email' => 'ada@example.com']);

        self::assertSame(202, $response->getStatusCode());
        self::assertCount(1, $this->sentEmails());
    }

    public function test_the_resend_interval_is_configurable(): void
    {
        $this->reconfigure(['MAGIC_LINK_RESEND_SECONDS' => '0']);

        $this->request('POST', '/api/auth/magic-link', ['email' => 'ada@example.com']);
        $this->request('POST', '/api/auth/magic-link', ['email' => 'ada@example.com']);

        self::assertCount(2, $this->sentEmails());
    }

    public function test_me_requires_a_valid_token(): void
    {
        $unauthorised = $this->request('GET', '/api/me');
        self::assertSame(401, $unauthorised->getStatusCode());

        $response = $this->request('GET', '/api/me', null, $this->authHeader('linus@example.com'));

        self::assertSame(200, $response->getStatusCode());
        self::assertSame('linus@example.com', $this->decode($response)['user']['email']);
    }

    public function test_registration_can_be_turned_off_for_a_new_address(): void
    {
        $this->reconfigure(['APP_ALLOW_REGISTRATION' => 'false']);

        $response = $this->request('POST', '/api/auth/magic-link', ['email' => 'nobody@example.com']);

        // Same response either way -- no enumeration signal.
        self::assertSame(202, $response->getStatusCode());
        self::assertSame([], $this->sentEmails());
        self::assertSame(0, (int) $this->db()->query('SELECT COUNT(*) FROM users')->fetchColumn());
    }

    public function test_turning_off_registration_does_not_block_an_existing_user(): void
    {
        // Sign up while registration is still open.
        $this->request('POST', '/api/auth/magic-link', ['email' => 'ada@example.com']);
        $this->request('POST', '/api/auth/verify-email', ['token' => $this->tokenFromEmail()]);
        $this->db()->prepare('UPDATE users SET verification_email_sent_at = NULL WHERE email = :e')
            ->execute(['e' => 'ada@example.com']);

        $this->reconfigure(['APP_ALLOW_REGISTRATION' => 'false']);

        $response = $this->request('POST', '/api/auth/magic-link', ['email' => 'ada@example.com']);

        self::assertSame(202, $response->getStatusCode());
        self::assertSame('ada@example.com', $this->lastEmail()['to']);
    }
}