<?php

declare(strict_types=1);

namespace App\Tests\Controller\Api;

use App\BusProNet\ApiClient;
use App\BusProNet\Model\PersonalData;
use App\Controller\Api\UserinfoController;
use App\Entity\User;
use App\Security\Crypt;
use App\Security\Role;
use PHPUnit\Framework\TestCase;
use Symfony\Component\DependencyInjection\Container;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage;
use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
use Symfony\Component\Security\Core\Authorization\AuthorizationCheckerInterface;

/**
 * The claims are a published contract (docs/api-consumer-guide.md), and the identity claims in
 * particular: a BusPro person may sign in under any address on its record, every one of those is
 * a separate account with its own roles, and BusPro answers all of them identically. So what
 * separates the accounts is asserted here rather than left to the consumers to discover.
 */
class UserinfoControllerTest extends TestCase
{
    private const LOGIN_EMAIL = 'someone@ep-reisen.de';
    private const CONTACT_EMAIL = 'private@example.test';

    public function testSubAndEmailAreExportedWithoutAnyOptionalScope(): void
    {
        $claims = $this->claims();

        self::assertSame(['sub', 'email'], array_keys($claims));
        self::assertSame('42', $claims['sub']);
        self::assertSame(self::LOGIN_EMAIL, $claims['email']);
    }

    public function testSubIsTheLocalAccountAndNotTheBusProPerson(): void
    {
        $claims = $this->claims(['ROLE_OAUTH2_ID']);

        // The ids identify the human, the subject identifies the account. A second account of the
        // same person reports these same two ids and must still be told apart.
        self::assertSame('42', $claims['sub']);
        self::assertSame(7, $claims['person_id']);
        self::assertSame(9, $claims['address_id']);
    }

    public function testEmailIsTheAuthenticatedAddressAndNotTheFirstContactOnTheBusProRecord(): void
    {
        $claims = $this->claims(['ROLE_OAUTH2_PROFILE']);

        self::assertSame(self::LOGIN_EMAIL, $claims['email']);
        self::assertSame(self::CONTACT_EMAIL, $claims['profile']['communication']['email']);
    }

    public function testRolesExportOnlyWhatIsEffective(): void
    {
        $claims = $this->claims(['ROLE_OAUTH2_ROLES'], [
            Role::USER,
            Role::EMPLOYEE,
            Role::TEAMER,
            Role::pending(Role::MANAGER),
        ]);

        // ROLE_EMPLOYEE is exported because consumers must read staff status from here rather than
        // re-deriving it from an email domain — which, given the two addresses, would disagree.
        self::assertSame([Role::EMPLOYEE, Role::TEAMER], $claims['roles']);
    }

    public function testUpstreamFailureIsReportedRatherThanAnswered(): void
    {
        $apiClient = $this->createStub(ApiClient::class);
        $apiClient->method('getPersonalData')->willThrowException(new \App\BusProNet\Exception\ApiClientException('nope'));

        $response = $this->call($apiClient, []);

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

    /**
     * @param string[] $grantedScopeRoles
     * @param string[] $roles
     *
     * @return array<string, mixed>
     */
    private function claims(array $grantedScopeRoles = [], array $roles = [Role::TEAMER]): array
    {
        $apiClient = $this->createStub(ApiClient::class);
        $apiClient->method('getPersonalData')->willReturn($this->personalData());

        $response = $this->call($apiClient, $grantedScopeRoles, $roles);

        self::assertSame(Response::HTTP_OK, $response->getStatusCode());

        return json_decode((string) $response->getContent(), true);
    }

    /**
     * @param string[] $grantedScopeRoles
     * @param string[] $roles
     */
    private function call(ApiClient $apiClient, array $grantedScopeRoles, array $roles = [Role::TEAMER]): Response
    {
        $crypt = $this->createStub(Crypt::class);
        $crypt->method('decrypt')->willReturn('md5-of-the-password');

        $controller = new UserinfoController($apiClient, $crypt);
        $controller->setContainer($this->container($this->user($roles), $grantedScopeRoles));

        return $controller->index();
    }

    /**
     * @param string[] $grantedScopeRoles
     */
    private function container(User $user, array $grantedScopeRoles): Container
    {
        $tokenStorage = new TokenStorage();
        $tokenStorage->setToken(new UsernamePasswordToken($user, 'api', $user->getRoles()));

        $authorizationChecker = $this->createStub(AuthorizationCheckerInterface::class);
        $authorizationChecker->method('isGranted')->willReturnCallback(
            static fn (mixed $attribute): bool => \in_array($attribute, $grantedScopeRoles, true),
        );

        // No 'serializer' service registered, so AbstractController::json() falls back to
        // JsonResponse — which is what this endpoint produces in production anyway.
        $container = new Container();
        $container->set('security.token_storage', $tokenStorage);
        $container->set('security.authorization_checker', $authorizationChecker);

        return $container;
    }

    /**
     * @param string[] $roles
     */
    private function user(array $roles): User
    {
        $user = (new User(self::LOGIN_EMAIL))
            ->setPassword('encrypted')
            ->setRoles($roles)
        ;

        // The id is generated by Doctrine and has no setter, but it is what `sub` exports.
        $property = new \ReflectionProperty(User::class, 'id');
        $property->setValue($user, 42);

        return $user;
    }

    private function personalData(): PersonalData
    {
        $personalData = new PersonalData();
        $personalData->personId = 7;
        $personalData->addressId = 9;
        $personalData->firstName = 'Alex';
        $personalData->name = 'Beispiel';

        // Deliberately not the login address: BusPro returns the first contact row on the record,
        // which is whichever of the person's addresses happens to come first.
        $personalData->communication->email = self::CONTACT_EMAIL;

        return $personalData;
    }
}