<?php declare(strict_types=1);

namespace Orbit\Tests;

use Monolog\Logger;
use PHPUnit\Framework\TestCase;

use Orbit\Cert;
use Orbit\Config;
use Orbit\Server;
use Orbit\Request;
use Orbit\Response;

final class ServerTest extends TestCase
{
    public function makeTestLogger(): Logger
    {
        $logger = new Logger('test-orbit');
        $logger->pushHandler(new \Monolog\Handler\TestHandler());

        return $logger;
    }

    public function getTestLogRecords($logger): array
    {
        return $logger->getHandlers()[0]->getRecords();
    }

    public function getTestLogMessages($logger): array
    {
        $messages = [];
        foreach ($this->getTestLogRecords($logger) as $message) {
            $messages[] = $message['level_name'] . ": " . $message['message'];
        }

        return $messages;
    }

    public function testConstructFailsWithoutConfig(): void
    {
        $this->expectException(\Exception::class);
        $this->expectExceptionMessage("Missing required cert file");

        $config = new Config();
        $server = new Server($config);
    }

    public function testConstructAutoCert(): void
    {
        $config = new Config(true);
        $server = new Server($config);
        $this->assertInstanceOf(Server::class, $server);
        $this->assertEquals(1, count($server->getLogger()->getHandlers()));
    }

    public function testConstructSetLogger(): void
    {
        $config = new Config(true);
        $logger = new Logger('orbit-test');
        $server = new Server($config, null, $logger);

        $l = $server->getLogger();
        $this->assertSame($l, $logger);
        $this->assertEquals(0, count($l->getHandlers()));
    }

    public function testConstructSetCert(): void
    {
        $config = new Config(true);
        $cert = new Cert($config);
        $server = new Server($config, $cert);

        $this->assertSame($cert, $server->cert);
    }

    public function testConstructSetsTimeout(): void
    {
        ini_set("default_socket_timeout", "32");

        $server = new Server(new Config(true));
        $this->assertEquals(32, $server->timeout);
    }

    public function testIntakeConnectionsMustBeResource(): void
    {
        $this->expectException(\Exception::class);
        $this->expectExceptionMessage("Stream server must be resource object");

        $server = new Server(new Config(true));

        $s = new \stdClass();
        $result = $server->intakeConnections($s);
    }

    public function testValidateRequestMustContainHost(): void
    {
        $request = new Request('');

        $server = new Server(new Config(true));
        [$is_valid, $response] = $server->validateRequest($request);

        $this->assertFalse($is_valid);
        $this->assertSame(Response::STATUS_BAD_REQUEST, $response->status);
        $this->assertStringContainsString("Bad request", $response->meta);
    }

    public function testValidateRequestMustHaveCorrectScheme(): void
    {
        $request = new Request('https://foo.bar/');

        $server = new Server(new Config(true));
        [$is_valid, $response] = $server->validateRequest($request);

        $this->assertFalse($is_valid);
        $this->assertSame(Response::STATUS_PROXY_REQUEST_REFUSED, $response->status);
        $this->assertStringContainsString("unsupported scheme", $response->meta);
    }

    public function testValidateRequestMustHaveCorrectHost(): void
    {
        $request = new Request('gemini://superfly.com/');

        $server = new Server(new Config(true));
        [$is_valid, $response] = $server->validateRequest($request);

        $this->assertFalse($is_valid);
        $this->assertSame(Response::STATUS_PROXY_REQUEST_REFUSED, $response->status);
        $this->assertStringContainsString("invalid host", $response->meta);
    }

    public function testValidateRequestMustHaveCorrectPort(): void
    {
        $request = new Request('gemini://localhost:8080/');

        $server = new Server(new Config(true));
        [$is_valid, $response] = $server->validateRequest($request);

        $this->assertFalse($is_valid);
        $this->assertSame(Response::STATUS_PROXY_REQUEST_REFUSED, $response->status);
        $this->assertStringContainsString("invalid port", $response->meta);
    }

    public function testValidateRequestCanIncludePort(): void
    {
        $request = new Request('gemini://localhost:1965/');

        $server = new Server(new Config(true));
        [$is_valid, $response] = $server->validateRequest($request);

        $this->assertTrue($is_valid);
        $this->assertSame('', $response->status);
    }

    public function testValidateRequestMustNotBeMoreThanLimit(): void
    {
        $url = 'gemini://localhost/';
        $request = new Request($url . str_repeat("x", 1025 - strlen($url)));

        $server = new Server(new Config(true));
        [$is_valid, $response] = $server->validateRequest($request);

        $this->assertFalse($is_valid);
        $this->assertSame(Response::STATUS_BAD_REQUEST, $response->status);
        $this->assertStringContainsString("too long", $response->meta);
    }

    public function testValidateRequestCanBeAtLimit(): void
    {
        $url = 'gemini://localhost/';
        $request = new Request($url . str_repeat("x", 1024 - strlen($url)));

        $server = new Server(new Config(true));
        [$is_valid, $response] = $server->validateRequest($request);

        $this->assertTrue($is_valid);
        $this->assertSame('', $response->status);
    }

    public function testValidateRequestMustNotContainNonUtf8Bytes(): void
    {
        $request = new Request('gemini://localhost/' . chr(240) . chr(159) . chr(144) . chr(152));

        $server = new Server(new Config(true));
        [$is_valid, $response] = $server->validateRequest($request);

        $this->assertFalse($is_valid);
        $this->assertSame(Response::STATUS_BAD_REQUEST, $response->status);
        $this->assertStringContainsString("non-UTF8", $response->meta);
    }

    public function testValidateRequestLocalhostIsValid(): void
    {
        $request = new Request('gemini://localhost/');

        $server = new Server(new Config(true));
        [$is_valid, $response] = $server->validateRequest($request);

        $this->assertTrue($is_valid);
        $this->assertSame('', $response->status);
    }

    public function testValidateRequestLoopbackAddrIsValid(): void
    {
        $request = new Request('gemini://127.0.0.1/');

        $server = new Server(new Config(true));
        [$is_valid, $response] = $server->validateRequest($request);

        $this->assertTrue($is_valid);
        $this->assertSame('', $response->status);
    }

    public function testValidateRequestMatchesConfigHostname(): void
    {
        $request = new Request('gemini://dogdays.dev/');

        $config = new Config(true);
        $config->hostname = 'dogdays.dev';
        $server = new Server($config);
        [$is_valid, $response] = $server->validateRequest($request);

        $this->assertTrue($is_valid);
        $this->assertSame('', $response->status);
        @unlink("certs/dogdays.dev.cert.pem");
        @unlink("certs/dogdays.dev.key.pem");
    }

    public function testValidateRequestMatchesConfigPort(): void
    {
        $request = new Request('gemini://localhost:1972/');

        $config = new Config(true);
        $config->port = '1972';
        $server = new Server($config);
        [$is_valid, $response] = $server->validateRequest($request);

        $this->assertTrue($is_valid);
        $this->assertSame('', $response->status);
    }

    public function testOnWarningTimedOut(): void
    {
        $logger = $this->makeTestLogger();
        $server = new Server(new Config(true), null, $logger);

        $result = $server->onWarning(1, 'Connection timed out');
        $this->assertTrue($result);
        $messages = $this->getTestLogMessages($logger);
        $this->assertNotContains('Error while accepting', $messages);
    }

    public function testOnWarningError(): void
    {
        $logger = $this->makeTestLogger();
        $server = new Server(new Config(true), null, $logger);

        $result = $server->onWarning(1, 'Something terrible happened');
        $this->assertTrue($result);
        $messages = $this->getTestLogMessages($logger);
        $this->assertStringContainsString('Error while accepting connection', $messages[3]);
    }

    public function testGetListenAddress(): void
    {
        $config = new Config(true);
        $config->host = '127.0.0.1';
        $config->port = 1888;
        $server = new Server($config);

        $address = $server->getListenAddress();

        $this->assertSame('tls://127.0.0.1:1888', $address);
    }

    public function tearDown(): void
    {
        @unlink("certs/localhost.cert.pem");
        @unlink("certs/localhost.key.pem");
    }
}