<?php

namespace Tests\Unit\Auth\Middleware;

use App\Auth\AuthMiddleware;
use App\Auth\CreateSessionDto;
use App\User\UseCases\CreateUserDto;
use App\User\User;
use App\ValueObjects\EmailAddress;
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;

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

    public function setUp(): void
    {
        $this->userRepo = new FakeUserRepository();
        $this->sessionRepo = new FakeSessionRepository();
        $this->clock = new FakeClock(
            new DateTimeImmutable('2025-01-01T12:00:00+00:00')
        );
        $this->user = $this->userRepo->create(new CreateUserDto(
            email: new EmailAddress('test@test.com'),
            passwordHash: '',
            isAdmin: false,
        ));
        $this->middleware = new AuthMiddleware(
            $this->sessionRepo,
            $this->userRepo,
            $this->clock,
        );
    }

    private function makeApiRequest(
        ?string $cookieToken = null
    ): ServerRequestInterface {
        $request = new ServerRequestFactory()
            ->createServerRequest('GET', 'http://localhost/api/texts');
        if ($cookieToken !== null) {
            $request = $request->withCookieParams([
                'auth_token' => $cookieToken,
            ]);
        }
        return $request;
    }

    private function makeHtmlRequest(
        ?string $cookieToken = null
    ): ServerRequestInterface {
        $request = new ServerRequestFactory()
            ->createServerRequest('GET', 'http://localhost/home')
            ->withHeader('Accept', 'text/html');
        if ($cookieToken !== null) {
            $request = $request->withCookieParams([
                'auth_token' => $cookieToken,
            ]);
        }
        return $request;
    }

    private function makeHandler(): RequestHandlerInterface
    {
        return new class implements RequestHandlerInterface {
            public ?ServerRequestInterface $capturedRequest = null;

            public function handle(
                ServerRequestInterface $request
            ): \Psr\Http\Message\ResponseInterface {
                $this->capturedRequest = $request;
                return new Response(200);
            }
        };
    }

    public function test_returns_401_json_when_cookie_missing(): void
    {
        $response = $this->middleware->process(
            $this->makeApiRequest(),
            $this->makeHandler(),
        );

        $this->assertEquals(401, $response->getStatusCode());
        $this->assertStringContainsString(
            'application/json',
            $response->getHeaderLine('Content-Type')
        );
    }

    public function test_returns_401_when_token_not_in_repo(): void
    {
        $response = $this->middleware->process(
            $this->makeApiRequest('unknown-token'),
            $this->makeHandler(),
        );

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

    public function test_returns_401_when_token_expired(): void
    {
        $this->sessionRepo->create(new CreateSessionDto(
            token: 'expired-token',
            userId: $this->user->getId(),
            createdAt: new DateTimeImmutable('2024-12-01T00:00:00+00:00'),
            expiresAt: new DateTimeImmutable('2024-12-08T00:00:00+00:00'),
        ));

        $response = $this->middleware->process(
            $this->makeApiRequest('expired-token'),
            $this->makeHandler(),
        );

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

    public function test_attaches_user_to_request_on_success(): void
    {
        $this->sessionRepo->create(new CreateSessionDto(
            token: 'valid-token',
            userId: $this->user->getId(),
            createdAt: new DateTimeImmutable('2025-01-01T00:00:00+00:00'),
            expiresAt: new DateTimeImmutable('2025-01-08T00:00:00+00:00'),
        ));
        $handler = $this->makeHandler();

        $this->middleware->process(
            $this->makeApiRequest('valid-token'),
            $handler,
        );

        $attached = $handler->capturedRequest->getAttribute('user');
        $this->assertInstanceOf(User::class, $attached);
        $this->assertEquals(
            'test@test.com',
            $attached->getEmail()->value()
        );
    }

    public function test_redirects_to_login_when_html_unauthenticated(): void
    {
        $response = $this->middleware->process(
            $this->makeHtmlRequest(),
            $this->makeHandler(),
        );

        $this->assertEquals(302, $response->getStatusCode());
        $this->assertEquals('/login', $response->getHeaderLine('Location'));
    }
}