<?php

namespace Tests\Unit\Middleware;

use App\Auth\CreateSessionDto;
use App\Middleware\AuthMiddleware;
use App\Shared\ValueObject\EmailAddress;
use App\User\CreateUserDto;
use App\User\User;
use DateTimeImmutable;
use PHPUnit\Framework\TestCase;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\RequestHandlerInterface;
use Slim\Psr7\Factory\ServerRequestFactory;
use Slim\Psr7\Response;
use Tests\Fakes\FakeClock;
use Tests\Fakes\FakeSessionRepository;
use Tests\Fakes\FakeUserRepository;
use Tests\Fakes\FakePasswordHasher;

class AuthMiddlewareTest extends TestCase
{
    private FakeSessionRepository $sessionRepo;
    private FakeClock $clock;
    private AuthMiddleware $middleware;
    private User $user;

    protected function setUp(): void
    {
        $this->sessionRepo = new FakeSessionRepository();
        $this->clock = new FakeClock(
            new DateTimeImmutable('2026-05-16 12:00:00'),
        );
        $this->middleware = new AuthMiddleware(
            $this->sessionRepo,
            $this->clock,
        );

        $userRepo = new FakeUserRepository();
        $hasher = new FakePasswordHasher();
        $this->user = $userRepo->create(new CreateUserDto(
            email: new EmailAddress('user@example.com'),
            passwordHash: $hasher->hash('password'),
        ));

        $this->sessionRepo->create(new CreateSessionDto(
            token: 'valid-token',
            user: $this->user,
            createdAt: new DateTimeImmutable('2026-05-16 12:00:00'),
            expiresAt: new DateTimeImmutable('2026-05-23 12:00:00'),
        ));
    }

    public function testPassesRequestToHandlerWhenCookieIsValid(): void
    {
        $request = $this->createRequestWithCookie('valid-token');

        $handler = $this->createMock(RequestHandlerInterface::class);
        $handler->expects($this->once())
            ->method('handle')
            ->with($this->callback(function (ServerRequestInterface $request) {
                $user = $request->getAttribute('user');
                return $user instanceof User
                    && $user->getId() === $this->user->getId();
            }))
            ->willReturn(new Response(200));

        $response = $this->middleware->process($request, $handler);

        $this->assertSame(200, $response->getStatusCode());
    }

    public function testReturns401WhenCookieIsMissing(): void
    {
        $request = self::createRequest();
        $handler = $this->createMock(RequestHandlerInterface::class);
        $handler->expects($this->never())->method('handle');

        $response = $this->middleware->process($request, $handler);

        $this->assertSame(401, $response->getStatusCode());
    }

    public function testReturns401WhenCookieIsEmpty(): void
    {
        $request = $this->createRequestWithCookie('');
        $handler = $this->createMock(RequestHandlerInterface::class);
        $handler->expects($this->never())->method('handle');

        $response = $this->middleware->process($request, $handler);

        $this->assertSame(401, $response->getStatusCode());
    }

    public function testReturns401WhenTokenIsUnknown(): void
    {
        $request = $this->createRequestWithCookie('unknown-token');
        $handler = $this->createMock(RequestHandlerInterface::class);
        $handler->expects($this->never())->method('handle');

        $response = $this->middleware->process($request, $handler);

        $this->assertSame(401, $response->getStatusCode());
    }

    public function testReturns401WhenSessionIsExpired(): void
    {
        $this->clock->setTime(
            new DateTimeImmutable('2026-05-30 12:00:00'),
        );

        $request = $this->createRequestWithCookie('valid-token');
        $handler = $this->createMock(RequestHandlerInterface::class);
        $handler->expects($this->never())->method('handle');

        $response = $this->middleware->process($request, $handler);

        $this->assertSame(401, $response->getStatusCode());
    }

    public function testDeletesExpiredSession(): void
    {
        $this->clock->setTime(
            new DateTimeImmutable('2026-05-30 12:00:00'),
        );

        $request = $this->createRequestWithCookie('valid-token');
        $handler = $this->createStub(RequestHandlerInterface::class);

        $this->middleware->process($request, $handler);

        $this->assertNull(
            $this->sessionRepo->findByToken('valid-token'),
        );
    }

    private static function createRequest(): ServerRequestInterface
    {
        $factory = new ServerRequestFactory();

        return $factory->createServerRequest('GET', '/');
    }

    private function createRequestWithCookie(
        string $token,
    ): ServerRequestInterface {
        $request = self::createRequest();

        return $request->withCookieParams([
            AuthMiddleware::COOKIE_NAME => $token,
        ]);
    }
}