mod plain_transport {
    use futures_lite::future;
    use mediasoup::data_structures::{
        AppData, SctpState, TransportListenIp, TransportProtocol, TransportTuple,
    };
    use mediasoup::plain_transport::{PlainTransportOptions, PlainTransportRemoteParameters};
    use mediasoup::router::{Router, RouterOptions};
    use mediasoup::rtp_parameters::{
        MimeTypeAudio, MimeTypeVideo, RtpCodecCapability, RtpCodecParametersParameters,
    };
    use mediasoup::sctp_parameters::SctpParameters;
    use mediasoup::srtp_parameters::{SrtpCryptoSuite, SrtpParameters};
    use mediasoup::transport::{Transport, TransportGeneric};
    use mediasoup::worker::{RequestError, Worker, WorkerSettings};
    use mediasoup::worker_manager::WorkerManager;
    use std::collections::HashSet;
    use std::env;
    use std::net::IpAddr;
    use std::num::{NonZeroU32, NonZeroU8};
    use std::sync::atomic::{AtomicUsize, Ordering};
    use std::sync::Arc;

    struct CustomAppData {
        foo: &'static str,
    }

    fn media_codecs() -> Vec<RtpCodecCapability> {
        vec![
            RtpCodecCapability::Audio {
                mime_type: MimeTypeAudio::Opus,
                preferred_payload_type: None,
                clock_rate: NonZeroU32::new(48000).unwrap(),
                channels: NonZeroU8::new(2).unwrap(),
                parameters: RtpCodecParametersParameters::from([
                    ("useinbandfec", 1u32.into()),
                    ("foo", "bar".into()),
                ]),
                rtcp_feedback: vec![],
            },
            RtpCodecCapability::Video {
                mime_type: MimeTypeVideo::VP8,
                preferred_payload_type: None,
                clock_rate: NonZeroU32::new(90000).unwrap(),
                parameters: RtpCodecParametersParameters::new(),
                rtcp_feedback: vec![],
            },
            RtpCodecCapability::Video {
                mime_type: MimeTypeVideo::H264,
                preferred_payload_type: None,
                clock_rate: NonZeroU32::new(90000).unwrap(),
                parameters: RtpCodecParametersParameters::from([
                    ("level-asymmetry-allowed", 1u32.into()),
                    ("packetization-mode", 1u32.into()),
                    ("profile-level-id", "4d0032".into()),
                    ("foo", "bar".into()),
                ]),
                rtcp_feedback: vec![], // Will be ignored.
            },
        ]
    }

    async fn init() -> (Worker, Router) {
        {
            let mut builder = env_logger::builder();
            if env::var(env_logger::DEFAULT_FILTER_ENV).is_err() {
                builder.filter_level(log::LevelFilter::Off);
            }
            let _ = builder.is_test(true).try_init();
        }

        let worker_manager = WorkerManager::new(
            env::var("MEDIASOUP_WORKER_BIN")
                .map(|path| path.into())
                .unwrap_or_else(|_| "../worker/out/Release/mediasoup-worker".into()),
        );

        let worker = worker_manager
            .create_worker(WorkerSettings::default())
            .await
            .expect("Failed to create worker");

        let router = worker
            .create_router(RouterOptions::new(media_codecs()))
            .await
            .expect("Failed to create router");

        (worker, router)
    }

    #[test]
    fn create_succeeds() {
        future::block_on(async move {
            let (_worker, router) = init().await;

            {
                let transport = router
                    .create_plain_transport({
                        let mut plain_transport_options =
                            PlainTransportOptions::new(TransportListenIp {
                                ip: "127.0.0.1".parse().unwrap(),
                                announced_ip: Some("4.4.4.4".parse().unwrap()),
                            });
                        plain_transport_options.rtcp_mux = false;

                        plain_transport_options
                    })
                    .await
                    .expect("Failed to create Plain transport");

                let router_dump = router.dump().await.expect("Failed to dump router");
                assert_eq!(router_dump.transport_ids, {
                    let mut set = HashSet::new();
                    set.insert(transport.id());
                    set
                });
            }

            {
                let new_transports_count = Arc::new(AtomicUsize::new(0));

                router
                    .on_new_transport({
                        let new_transports_count = Arc::clone(&new_transports_count);

                        move |_transport| {
                            new_transports_count.fetch_add(1, Ordering::SeqCst);
                        }
                    })
                    .detach();

                let transport1 = router
                    .create_plain_transport({
                        let mut plain_transport_options =
                            PlainTransportOptions::new(TransportListenIp {
                                ip: "127.0.0.1".parse().unwrap(),
                                announced_ip: Some("9.9.9.1".parse().unwrap()),
                            });
                        plain_transport_options.rtcp_mux = true;
                        plain_transport_options.enable_sctp = true;
                        plain_transport_options.app_data =
                            AppData::new(CustomAppData { foo: "bar" });

                        plain_transport_options
                    })
                    .await
                    .expect("Failed to create Plain transport");

                assert_eq!(new_transports_count.load(Ordering::SeqCst), 1);
                assert_eq!(transport1.closed(), false);
                assert_eq!(
                    transport1
                        .app_data()
                        .downcast_ref::<CustomAppData>()
                        .unwrap()
                        .foo,
                    "bar",
                );

                assert!(matches!(transport1.tuple(), TransportTuple::LocalOnly{ .. }));
                if let TransportTuple::LocalOnly {
                    local_ip, protocol, ..
                } = transport1.tuple()
                {
                    assert_eq!(local_ip, "9.9.9.1".parse::<IpAddr>().unwrap());
                    assert_eq!(protocol, TransportProtocol::Udp);
                }
                assert_eq!(transport1.rtcp_tuple(), None);
                assert_eq!(
                    transport1.sctp_parameters(),
                    Some(SctpParameters {
                        port: 5000,
                        os: 1024,
                        mis: 1024,
                        max_message_size: 262144,
                    }),
                );
                assert_eq!(transport1.sctp_state(), Some(SctpState::New));
                assert_eq!(transport1.srtp_parameters(), None);

                {
                    let transport_dump = transport1
                        .dump()
                        .await
                        .expect("Failed to dump Plain transport");

                    assert_eq!(transport_dump.id, transport1.id());
                    assert_eq!(transport_dump.direct, false);
                    assert_eq!(transport_dump.producer_ids, vec![]);
                    assert_eq!(transport_dump.consumer_ids, vec![]);
                    assert_eq!(transport_dump.tuple, transport1.tuple());
                    assert_eq!(transport_dump.rtcp_tuple, transport1.rtcp_tuple());
                    assert_eq!(transport_dump.srtp_parameters, transport1.srtp_parameters());
                    assert_eq!(transport_dump.sctp_state, transport1.sctp_state());
                }
            }

            {
                let transport2 = router
                    .create_plain_transport({
                        let mut plain_transport_options =
                            PlainTransportOptions::new(TransportListenIp {
                                ip: "127.0.0.1".parse().unwrap(),
                                announced_ip: None,
                            });
                        plain_transport_options.rtcp_mux = false;

                        plain_transport_options
                    })
                    .await
                    .expect("Failed to create Plain transport");

                assert_eq!(transport2.closed(), false);
                assert_eq!(transport2.app_data().downcast_ref::<()>().unwrap(), &(),);
                assert!(matches!(transport2.tuple(), TransportTuple::LocalOnly{ .. }));
                if let TransportTuple::LocalOnly {
                    local_ip, protocol, ..
                } = transport2.tuple()
                {
                    assert_eq!(local_ip, "127.0.0.1".parse::<IpAddr>().unwrap());
                    assert_eq!(protocol, TransportProtocol::Udp);
                }
                assert!(transport2.rtcp_tuple().is_some());
                if let TransportTuple::LocalOnly {
                    local_ip, protocol, ..
                } = transport2.rtcp_tuple().unwrap()
                {
                    assert_eq!(local_ip, "127.0.0.1".parse::<IpAddr>().unwrap());
                    assert_eq!(protocol, TransportProtocol::Udp);
                }
                assert_eq!(transport2.srtp_parameters(), None);
                assert_eq!(transport2.sctp_state(), None);

                {
                    let transport_dump = transport2
                        .dump()
                        .await
                        .expect("Failed to dump Plain transport");

                    assert_eq!(transport_dump.id, transport2.id());
                    assert_eq!(transport_dump.direct, false);
                    assert_eq!(transport_dump.tuple, transport2.tuple());
                    assert_eq!(transport_dump.rtcp_tuple, transport2.rtcp_tuple());
                    assert_eq!(transport_dump.sctp_state, transport2.sctp_state());
                }
            }
        });
    }

    #[test]
    fn create_enable_srtp_succeeds() {
        future::block_on(async move {
            let (_worker, router) = init().await;

            let transport1 = router
                .create_plain_transport({
                    let mut plain_transport_options =
                        PlainTransportOptions::new(TransportListenIp {
                            ip: "127.0.0.1".parse().unwrap(),
                            announced_ip: Some("9.9.9.1".parse().unwrap()),
                        });
                    plain_transport_options.enable_srtp = true;

                    plain_transport_options
                })
                .await
                .expect("Failed to create Plain transport");

            assert!(transport1.srtp_parameters().is_some());
            assert_eq!(
                transport1.srtp_parameters().unwrap().crypto_suite,
                SrtpCryptoSuite::AesCm128HmacSha180,
            );
            assert_eq!(transport1.srtp_parameters().unwrap().key_base64.len(), 40);

            // Missing srtp_parameters.
            assert!(matches!(
                transport1
                    .connect(PlainTransportRemoteParameters {
                        ip: Some("127.0.0.2".parse().unwrap()),
                        port: Some(9999),
                        rtcp_port: None,
                        srtp_parameters: None
                    })
                    .await,
                Err(RequestError::Response { .. }),
            ));

            // Valid srtp_parameters. And let's update the crypto suite.
            transport1
                .connect(PlainTransportRemoteParameters {
                    ip: Some("127.0.0.2".parse().unwrap()),
                    port: Some(9999),
                    rtcp_port: None,
                    srtp_parameters: Some(SrtpParameters {
                        crypto_suite: SrtpCryptoSuite::AesCm128HmacSha132,
                        key_base64: "ZnQ3eWJraDg0d3ZoYzM5cXN1Y2pnaHU5NWxrZTVv".to_string(),
                    }),
                })
                .await
                .expect("Failed to establish Plain transport connection");

            assert_eq!(
                transport1.srtp_parameters().unwrap().crypto_suite,
                SrtpCryptoSuite::AesCm128HmacSha132,
            );
        });
    }

    #[test]
    fn create_non_bindable_ip() {
        future::block_on(async move {
            let (_worker, router) = init().await;

            assert!(matches!(
                router
                    .create_plain_transport(PlainTransportOptions::new(TransportListenIp {
                        ip: "8.8.8.8".parse().unwrap(),
                        announced_ip: None,
                    }))
                    .await,
                Err(RequestError::Response { .. }),
            ));
        });
    }

    #[test]
    fn get_stats_succeeds() {
        future::block_on(async move {
            let (_worker, router) = init().await;

            let transport = router
                .create_plain_transport({
                    let mut plain_transport_options =
                        PlainTransportOptions::new(TransportListenIp {
                            ip: "127.0.0.1".parse().unwrap(),
                            announced_ip: Some("4.4.4.4".parse().unwrap()),
                        });
                    plain_transport_options.rtcp_mux = false;

                    plain_transport_options
                })
                .await
                .expect("Failed to create Plain transport");

            let stats = transport
                .get_stats()
                .await
                .expect("Failed to get stats on Plain transport");

            assert_eq!(stats.len(), 1);
            assert_eq!(stats[0].transport_id, transport.id());
            assert_eq!(stats[0].bytes_received, 0);
            assert_eq!(stats[0].recv_bitrate, 0);
            assert_eq!(stats[0].bytes_sent, 0);
            assert_eq!(stats[0].send_bitrate, 0);
            assert_eq!(stats[0].rtp_bytes_received, 0);
            assert_eq!(stats[0].rtp_recv_bitrate, 0);
            assert_eq!(stats[0].rtp_bytes_sent, 0);
            assert_eq!(stats[0].rtp_send_bitrate, 0);
            assert_eq!(stats[0].rtx_bytes_received, 0);
            assert_eq!(stats[0].rtx_recv_bitrate, 0);
            assert_eq!(stats[0].rtx_bytes_sent, 0);
            assert_eq!(stats[0].rtx_send_bitrate, 0);
            assert_eq!(stats[0].probation_bytes_sent, 0);
            assert_eq!(stats[0].probation_send_bitrate, 0);
            assert!(matches!(
                stats[0].tuple,
                Some(TransportTuple::LocalOnly { .. }),
            ));
            if let TransportTuple::LocalOnly {
                local_ip, protocol, ..
            } = stats[0].tuple.unwrap()
            {
                assert_eq!(local_ip, "4.4.4.4".parse::<IpAddr>().unwrap());
                assert_eq!(protocol, TransportProtocol::Udp);
            }
            assert_eq!(stats[0].rtcp_tuple, None);
        });
    }

    #[test]
    fn connect_succeeds() {
        future::block_on(async move {
            let (_worker, router) = init().await;

            let transport = router
                .create_plain_transport({
                    let mut plain_transport_options =
                        PlainTransportOptions::new(TransportListenIp {
                            ip: "127.0.0.1".parse().unwrap(),
                            announced_ip: Some("4.4.4.4".parse().unwrap()),
                        });
                    plain_transport_options.rtcp_mux = false;

                    plain_transport_options
                })
                .await
                .expect("Failed to create Plain transport");

            transport
                .connect(PlainTransportRemoteParameters {
                    ip: Some("1.2.3.4".parse().unwrap()),
                    port: Some(1234),
                    rtcp_port: Some(1235),
                    srtp_parameters: None,
                })
                .await
                .expect("Failed to establish Plain transport connection");

            // Must fail if connected.
            assert!(matches!(
                transport
                    .connect(PlainTransportRemoteParameters {
                        ip: Some("1.2.3.4".parse().unwrap()),
                        port: Some(1234),
                        rtcp_port: Some(1235),
                        srtp_parameters: None,
                    })
                    .await,
                Err(RequestError::Response { .. }),
            ));

            assert!(matches!(transport.tuple(), TransportTuple::WithRemote{ .. }));
            if let TransportTuple::WithRemote {
                remote_ip,
                remote_port,
                protocol,
                ..
            } = transport.tuple()
            {
                assert_eq!(remote_ip, "1.2.3.4".parse::<IpAddr>().unwrap());
                assert_eq!(remote_port, 1234);
                assert_eq!(protocol, TransportProtocol::Udp);
            }
            assert!(transport.rtcp_tuple().is_some());
            if let TransportTuple::WithRemote {
                remote_ip,
                remote_port,
                protocol,
                ..
            } = transport.rtcp_tuple().unwrap()
            {
                assert_eq!(remote_ip, "1.2.3.4".parse::<IpAddr>().unwrap());
                assert_eq!(remote_port, 1235);
                assert_eq!(protocol, TransportProtocol::Udp);
            }
        });
    }

    #[test]
    fn connect_wrong_arguments() {
        future::block_on(async move {
            let (_worker, router) = init().await;

            let transport = router
                .create_plain_transport({
                    let mut plain_transport_options =
                        PlainTransportOptions::new(TransportListenIp {
                            ip: "127.0.0.1".parse().unwrap(),
                            announced_ip: Some("4.4.4.4".parse().unwrap()),
                        });
                    plain_transport_options.rtcp_mux = false;

                    plain_transport_options
                })
                .await
                .expect("Failed to create Plain transport");

            // No SRTP enabled so passing srtp_parameters must fail.
            assert!(matches!(
                transport
                    .connect(PlainTransportRemoteParameters {
                        ip: Some("127.0.0.2".parse().unwrap()),
                        port: Some(9998),
                        rtcp_port: Some(9999),
                        srtp_parameters: Some(SrtpParameters {
                            crypto_suite: SrtpCryptoSuite::AesCm128HmacSha180,
                            key_base64: "ZnQ3eWJraDg0d3ZoYzM5cXN1Y2pnaHU5NWxrZTVv".to_string(),
                        }),
                    })
                    .await,
                Err(RequestError::Response { .. }),
            ));
        });
    }

    #[test]
    fn close_event() {
        future::block_on(async move {
            let (_worker, router) = init().await;

            let transport = router
                .create_plain_transport({
                    let mut plain_transport_options =
                        PlainTransportOptions::new(TransportListenIp {
                            ip: "127.0.0.1".parse().unwrap(),
                            announced_ip: Some("4.4.4.4".parse().unwrap()),
                        });
                    plain_transport_options.rtcp_mux = false;

                    plain_transport_options
                })
                .await
                .expect("Failed to create Plain transport");

            let (close_tx, close_rx) = async_oneshot::oneshot::<()>();
            let _handler = transport.on_close(move || {
                let _ = close_tx.send(());
            });

            drop(transport);

            close_rx.await.expect("Failed to receive close event");
        });
    }

    #[test]
    fn router_close_event() {
        future::block_on(async move {
            let (worker, router) = init().await;

            let transport = router
                .create_plain_transport({
                    let mut plain_transport_options =
                        PlainTransportOptions::new(TransportListenIp {
                            ip: "127.0.0.1".parse().unwrap(),
                            announced_ip: Some("4.4.4.4".parse().unwrap()),
                        });
                    plain_transport_options.rtcp_mux = false;

                    plain_transport_options
                })
                .await
                .expect("Failed to create Plain transport");

            let (close_tx, close_rx) = async_oneshot::oneshot::<()>();
            let _handler = transport.on_close(move || {
                let _ = close_tx.send(());
            });

            let (router_close_tx, router_close_rx) = async_oneshot::oneshot::<()>();
            let _handler = transport.on_router_close(move || {
                let _ = router_close_tx.send(());
            });

            unsafe {
                libc::kill(worker.pid() as i32, libc::SIGINT);
            }

            router_close_rx
                .await
                .expect("Failed to receive router_close event");
            close_rx.await.expect("Failed to receive close event");

            assert_eq!(transport.closed(), true);
        });
    }
}
