<?php
declare(strict_types=1);

namespace ShlinkioTest\Shlink\Rest\Middleware;

use PHPUnit\Framework\TestCase;
use Prophecy\Prophecy\MethodProphecy;
use Prophecy\Prophecy\ObjectProphecy;
use Psr\Http\Server\RequestHandlerInterface;
use Shlinkio\Shlink\Rest\Action\AuthenticateAction;
use Shlinkio\Shlink\Rest\Authentication\JWTService;
use Shlinkio\Shlink\Rest\Middleware\CheckAuthenticationMiddleware;
use ShlinkioTest\Shlink\Common\Util\TestUtils;
use Zend\Diactoros\Response;
use Zend\Diactoros\ServerRequestFactory;
use Zend\Expressive\Router\Route;
use Zend\Expressive\Router\RouteResult;
use Zend\I18n\Translator\Translator;
use function Zend\Stratigility\middleware;

class CheckAuthenticationMiddlewareTest extends TestCase
{
    /**
     * @var CheckAuthenticationMiddleware
     */
    protected $middleware;
    /**
     * @var ObjectProphecy
     */
    protected $jwtService;

    /**
     * @var callable
     */
    protected $dummyMiddleware;

    public function setUp()
    {
        $this->jwtService = $this->prophesize(JWTService::class);
        $this->middleware = new CheckAuthenticationMiddleware($this->jwtService->reveal(), Translator::factory([]));
        $this->dummyMiddleware = middleware(function ($request, $handler) {
            return new Response\EmptyResponse;
        });
    }

    /**
     * @test
     */
    public function someWhiteListedSituationsFallbackToNextMiddleware()
    {
        $request = ServerRequestFactory::fromGlobals();
        $delegate = $this->prophesize(RequestHandlerInterface::class);
        /** @var MethodProphecy $process */
        $process = $delegate->handle($request)->willReturn(new Response());

        $this->middleware->process($request, $delegate->reveal());
        $process->shouldHaveBeenCalledTimes(1);

        $request = ServerRequestFactory::fromGlobals()->withAttribute(
            RouteResult::class,
            RouteResult::fromRouteFailure(['GET'])
        );
        $delegate = $this->prophesize(RequestHandlerInterface::class);
        /** @var MethodProphecy $process */
        $process = $delegate->handle($request)->willReturn(new Response());
        $this->middleware->process($request, $delegate->reveal());
        $process->shouldHaveBeenCalledTimes(1);

        $request = ServerRequestFactory::fromGlobals()->withAttribute(
            RouteResult::class,
            RouteResult::fromRoute(new Route(
                'foo',
                $this->dummyMiddleware,
                Route::HTTP_METHOD_ANY,
                AuthenticateAction::class
            ))
        );
        $delegate = $this->prophesize(RequestHandlerInterface::class);
        /** @var MethodProphecy $process */
        $process = $delegate->handle($request)->willReturn(new Response());
        $this->middleware->process($request, $delegate->reveal());
        $process->shouldHaveBeenCalledTimes(1);

        $request = ServerRequestFactory::fromGlobals()->withAttribute(
            RouteResult::class,
            RouteResult::fromRoute(new Route('bar', $this->dummyMiddleware), [])
        )->withMethod('OPTIONS');
        $delegate = $this->prophesize(RequestHandlerInterface::class);
        /** @var MethodProphecy $process */
        $process = $delegate->handle($request)->willReturn(new Response());
        $this->middleware->process($request, $delegate->reveal());
        $process->shouldHaveBeenCalledTimes(1);
    }

    /**
     * @test
     */
    public function noHeaderReturnsError()
    {
        $request = ServerRequestFactory::fromGlobals()->withAttribute(
            RouteResult::class,
            RouteResult::fromRoute(new Route('bar', $this->dummyMiddleware), [])
        );
        $response = $this->middleware->process($request, TestUtils::createReqHandlerMock()->reveal());
        $this->assertEquals(401, $response->getStatusCode());
    }

    /**
     * @test
     */
    public function provideAnAuthorizationWithoutTypeReturnsError()
    {
        $authToken = 'ABC-abc';
        $request = ServerRequestFactory::fromGlobals()->withAttribute(
            RouteResult::class,
            RouteResult::fromRoute(new Route('bar', $this->dummyMiddleware), [])
        )->withHeader(CheckAuthenticationMiddleware::AUTHORIZATION_HEADER, $authToken);

        $response = $this->middleware->process($request, TestUtils::createReqHandlerMock()->reveal());

        $this->assertEquals(401, $response->getStatusCode());
        $this->assertTrue(strpos($response->getBody()->getContents(), 'You need to provide the Bearer type') > 0);
    }

    /**
     * @test
     */
    public function provideAnAuthorizationWithWrongTypeReturnsError()
    {
        $authToken = 'ABC-abc';
        $request = ServerRequestFactory::fromGlobals()->withAttribute(
            RouteResult::class,
            RouteResult::fromRoute(new Route('bar', $this->dummyMiddleware), [])
        )->withHeader(CheckAuthenticationMiddleware::AUTHORIZATION_HEADER, 'Basic ' . $authToken);

        $response = $this->middleware->process($request, TestUtils::createReqHandlerMock()->reveal());

        $this->assertEquals(401, $response->getStatusCode());
        $this->assertTrue(
            strpos($response->getBody()->getContents(), 'Provided authorization type Basic is not supported') > 0
        );
    }

    /**
     * @test
     */
    public function provideAnExpiredTokenReturnsError()
    {
        $authToken = 'ABC-abc';
        $request = ServerRequestFactory::fromGlobals()->withAttribute(
            RouteResult::class,
            RouteResult::fromRoute(new Route('bar', $this->dummyMiddleware), [])
        )->withHeader(CheckAuthenticationMiddleware::AUTHORIZATION_HEADER, 'Bearer ' . $authToken);
        $this->jwtService->verify($authToken)->willReturn(false)->shouldBeCalledTimes(1);

        $response = $this->middleware->process($request, TestUtils::createReqHandlerMock()->reveal());
        $this->assertEquals(401, $response->getStatusCode());
    }

    /**
     * @test
     */
    public function provideCorrectTokenUpdatesExpirationAndFallsBackToNextMiddleware()
    {
        $authToken = 'ABC-abc';
        $request = ServerRequestFactory::fromGlobals()->withAttribute(
            RouteResult::class,
            RouteResult::fromRoute(new Route('bar', $this->dummyMiddleware), [])
        )->withHeader(CheckAuthenticationMiddleware::AUTHORIZATION_HEADER, 'bearer ' . $authToken);
        $this->jwtService->verify($authToken)->willReturn(true)->shouldBeCalledTimes(1);
        $this->jwtService->refresh($authToken)->willReturn($authToken)->shouldBeCalledTimes(1);

        $delegate = $this->prophesize(RequestHandlerInterface::class);
        /** @var MethodProphecy $process */
        $process = $delegate->handle($request)->willReturn(new Response());
        $resp = $this->middleware->process($request, $delegate->reveal());

        $process->shouldHaveBeenCalledTimes(1);
        $this->assertArrayHasKey(CheckAuthenticationMiddleware::AUTHORIZATION_HEADER, $resp->getHeaders());
    }
}