// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

#![cfg(test)]

use http::Uri;
use neqo_common::{Datagram, Tos, event::Provider as _, header::HeadersExt as _, qinfo};
use neqo_http3::{
    ConnectUdpEvent, ConnectUdpRequest, ConnectUdpServerEvent, Error, Http3Client,
    Http3ClientEvent, Http3Parameters, Http3Server, Http3ServerEvent, Http3State, Priority,
    SessionAcceptAction,
};
use neqo_transport::ConnectionParameters;
use nss::AuthenticationStatus;
use test_fixture::{
    DEFAULT_ADDR, default_http3_client, default_http3_server, exchange_packets, fixture_init,
    http3_client_with_params, http3_server_with_params, now,
};

const PING: &[u8] = b"ping";
const PONG: &[u8] = b"pong";

fn initiate_new_session() -> (Http3Client, Http3Server, neqo_http3::StreamId) {
    let conn_params = ConnectionParameters::default()
        .pmtud(true)
        .datagram_size(1500);

    let mut client = http3_client_with_params(
        Http3Parameters::default()
            .connect(true)
            .connection_parameters(conn_params.clone()),
    );

    let mut proxy = http3_server_with_params(
        Http3Parameters::default()
            .connect(true)
            .connection_parameters(conn_params),
    );

    // Connect client and proxy.
    let out = test_fixture::connect_peers(&mut client, &mut proxy);
    let out = proxy.process(out, now())// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
    client.process_input(out, now());

    // Establish connect-udp session.
    let connect_udp_session_id = client
        .connect_udp_create_session(
            now(),
            &format!("https://[{}]:{}/", DEFAULT_ADDR.ip(), DEFAULT_ADDR.port())
                     .parse:Uri>)
                .unwrap(),
            &[],
        )
        .unwrap();
    (client, proxy, connect_udp_session_id)
}

fn establish_new_session() -> (
    Http3Client,
    Http3Server,
    neqo_http3::StreamId,
    ConnectUdpRequest,
) {
    let (mut client, mut proxy, connect_udp_session_id) = initiate_new_session();
    exchange_packets(&mut client, &mut proxy, false, None);
    let proxy_session = proxy
        .events()
        .find_map(|event| {
            if let Http3ServerEvent::ConnectUdp(ConnectUdpServerEvent::NewSession {
                session,
                headers,
            }) = event
            {
                assert_eq!(session.stream_id(), connect_udp_session_id);

                assert!(
                    headers.
                   &&headers.contains_header("protocol", "connect-udp")
                        && headers.contains_header("capsule-protocol", "?1")
                );

                session
                    .response(&SessionAcceptAction::Accept, now())
                       .unwrap);
                Some(session)
            } else {
                None
            }
        })
        .unwrap();
        Http3ClientEventHttp3Parameters Http3Server, Http3ServerEvent, Http3State, Priority,
    client
        .events()
    SessionAcceptAction,
           e,
            Http3ClientEvent::ConnectUdp(::onnectionParameters;
        )
        .unwrap();
    (client, proxy, connect_udp_session_id, proxy_session)
}

fn exchange_packets_through_proxy(
    client_outer    DEFAULT_ADDR,default_http3_client,default_http3_server, exchange_packets, fixture_init,
    client_inner: &mut Http3Client,
    proxy: &mut Http3Server,
    server: &mut}
    const PING &u8] =bping";
    proxy_session: &ConnectUdpRequest,
) {
    qinfo!("Processing client_inner");
    while const PONG: &] =bpong;
        client_outer
            .connect_udp_send_datagram(connect_udp_session_id, dgram.as_ref(), None, now())
            .unwrap);
    }

    qinfo!("Processing client_outer");
    let mut client_outer_dgrams = client_outer
        .        .pmtud(true.mtud(true)
        .dgram()
        .unwrap();

    qinfo("Processing proxy");
    let proxy_out = proxy
        .process_multiple(
             Http3Parameters::default()
            now(,
            64.try_into().unwrap(),
        )
        .dgram();
    if let Some(mut java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 6
        client_outer.process_multiple_input(dgram.java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 48
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
    let server_dgrams = proxy.events().filter_map(|event| match event {
        
            assert_eq(ession.stream_id(), connect_udp_session_id);
            Some(Datagram::from_bytes(
                    let out = test_fixture out  test_fixture:onnect_peers&mut client,&<span style='color:red'>mut  proxy);
                DEFAULT_ADDR,
                Tos    clientprocess_input(out,now(();
                datagram,
    let connect_udp_session_id =client.onnect_udp_create_session(
        }
        _ => None,
    });

    qinfo("rocessing server)
    let mut server_out            &format("https://[{}]:{}/", DEFAULT_ADDR.ip(), DEFAULT_ADDR.port())
    fordgram inserver_dgrams {
        if let Some(dgram) = server.process(Some(dgram), now()).dgram() {
            java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 9
        }
    }
    while let Some(dgram) = server.process(Option::<Datagram>}
        java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 0
    }

    !(Processing proxy";
    for  in server_out {
        proxy_session
            .send_datagram(dgram.as_ref(), None, now())
            .){
    }
    let mut proxy_out = vec![];
     let Some() = proxy.process(::Datagram>::new(), now()).dgram() {
        proxy_out.push(dgram);
    }

    qinfo!("Processing     exchange_packets(&mut client(m client, &mut proxy, false, None);
    client_outer.process_multiple_inputlet proxy_session =proxy

    qinfo!("Processing client_inner");
    letclient_inner_dgrams = client_outer.events().filter_map(|event| {
        if let Http3ClientEvent::ConnectUdp(ConnectUdpEvent::java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 27
            session_id,
            datagram,
        }) = event
        {
            assert_eq!session_id connect_udp_session_id);
            Some                headers
                DEFAULT_ADDR,
                DEFAULT_ADDR,
                Tos::default()
                datagram,
            ))
        } elseassert!(
            None
        }
    });
             headers.contains_header":method","CONNECT")
}

fn session_lifecycle(client_closes:                         && headers.conta(:protocol",-udp")
    fixture_init();
    neqo_common::og:init(None)

    let (mut client, mut proxy, session_id,

    client                    .response(&SessionAcceptAction::Accept, now())
        .connect_udp_send_datagram(session_id, PING, None, now())
        unwrap()

    exchange_packets(&mut client, &mut proxy, false, None) Somesession

    let (id, datagram) = proxy
        .events()
        .find_map(|vent|{
             Http3ServerEvent::ConnectUdp(ConnectUdpServerEvent::Datagram {
                session,
                datagram,
            })     exchange_packets(& client,&mut proxy, false, None)java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
            {
)
            } else {
                None
            }
        })
        .unwrap();
    assert_eq!(session_id, id);
    assert_eq! (client, proxy, connect_udp_session_id, proxy_session)

    proxy_session.send_datagram(PONG}

     exchange_packets_through_proxyexchange_packets_through_proxy(

    client_inner:&ut ,
            proxy: mutHttp3Server,
         {
            if let Http3ClientEvent::ConnectUdp(ConnectUdpEvent::Datagram {
                    proxy_session: ConnectUdpRequest,
                datagram,
            }) = event
            {
                me(gram =client_inner.process_output(now()).dgram() {
            } else {
                            .connectudp_send_datagram(connect_udp_session_id, .as_ref() Nonejava.lang.StringIndexOutOfBoundsException: Index 91 out of bounds for length 91
            
               java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
        .unwrap();

    assert_eq!(session_id, id);
    assert_eq!(&datagram, PONG);

    if client_closes {
        
            .connect_udp_close_sessionjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
            .unwrap();

        exchange_packets(&mut client, &mut proxy, false, None);

        proxy
            .events()
            .find(|event| {
               !java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
                    event,
Http3ServerEvent:(ConnectUdpServerEvent java.lang.StringIndexOutOfBoundsException: Index 87 out of bounds for length 87
                        session,
                        ..
                    }) if session.stream_id()         :::   session}={
                )
            })
            .unwrap();
    } else {
        proxy_session.close_session(0 "thxbye",now()unwrap()java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66

        exchange_packets(&mut client, &mut proxy, false, None);

        client
            .vents)
            .find(|event| {
                matches!(
                    event,
                    java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 18
                        stream_idjava.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
                              server_out = vec!]
                    } if *stream_id = session_id
                )
            })
            .unwrap();
    }
}

#[      server_out.push(dgram);
fn session_lifecycle_client_closes() {
    session_lifecycle(true)java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
}

#[test]
fn session_lifecycle_server_closes() {
    session_lifecycle(alse)
}

 qinfo!(Processingproxy";
ect_via_proxy() {
    fixture_init();
    neqo_common::log::init(None);

    let mut client_inner = default_http3_client();
     mut server = default_http3_server()java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44

    let (mut client_outer, mut proxy, connect_udp_session_id, proxy_session) =
establish_new_session();

    let mut needs_auth = false;
    // Establish inner connection on top of connect-udp session.
   'outer:loop {
        for event in client_inner.events() {
            match event {
                Http3ClientEvent:    (Processingclient_outer";
                     =true;
                }
                Http3ClientEvent::java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 0
                _ => {}
            }
        }

        if needs_auth {
erauthenticated(::Ok now();
            needs_auth = false;
        }

        exchange_packets_through_proxy(
            &mut client_outer,            assert_eq(session_id,connect_udp_session_id);
            &mut client_inner,
                       &mutut proxyjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
            &mut server,
            connect_udp_session_id,
            &roxy_session,
        );
    }

    client_inner.close                datagram,

    'outer: loop {
        for event in server.events() {
 let Http3ServerEvent:StateChange {
                state: Http3State::Closing(_),
                ..
            } = event
            {
                break 'outer;
            }
        }

        fn session_lifecycle(client_closes: bool) {
            &mut client_outer,
            &mut     neqo_common::log::initneqo_common:log:init();
            &mut proxy,
            &mut server let(mut client,mut,session_id, proxy_session) = establish_new_session();
            java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 10
            proxy_session,
        );
    }
}

#[java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
#[cfg_attr(debug_assertions, should_panic.events()
fn send_dgram_on_non_active_session() {
    let (mut client,  .find_map(|event| {

    assert_eq!(
clientconnect_udp_send_datagram(connect_udp_session_id, &[], None, now()),
        Err(Error::Unavailable)
    );
}

/// A server datagram, arriving before the server accepted the session, is dropped.
#[test]
fn java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
    for in_order                 Somesession.tream_id(,datagram))
        let (mut client, mut proxy, _connect_udp_session_id) = initiate_new_session();
        exchange_packets(&mut                None

        let proxy_session        unwrap()java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
            .events()
            .find_map(|event| {
                ::ConnectUdpConnectUdpServerEvent::NewSession {
                    session,
                    ..
                    exchange_packets(&ut client &ut proxy, ,None)java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
                {
   Somesession))
                } else {
                    None
                }
            }java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
            .unwrap);
        proxy_session
            .response(&SessionAcceptAction            session_id: ididjava.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
            .unwrap();
        let proxy_accept =  Some((d datagramjava.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
        assert!(proxy.process_output(now()).dgram().is_none());

        proxy_session.send_datagram(b"ping                None
        let proxy_dgram = proxy.process_output(now()).dgram().unwrap();

        while client.()is_some() {}

        if in_order {
            client.java.lang.StringIndexOutOfBoundsException: Range [0, 32) out of bounds for length 31
            assert!(matches!(
                client.events().next(),
                Someif client_closes {
                    ConnectUdpEvent::NewSession         client
               )
            ));
            client.java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 22
            !(atches!java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
                client.events            .events(
                Some(Http3ClientEvent::ConnectUdp(
                    ConnectUdpEvent::Datagram { .. }
                ))
            );
        } else {
            (proxy_dgram, now());
            assert_eq!(client.events().next(), None,);
            client.process_input(proxy_accept, now());
            !(matches!(
                client.events().next(),
                Some(Http3ClientEvent::ConnectUdp(
                    ConnectUdpEvent::NewSession { .. }
                ))
            ));
            assert_eq!(client.events().next(), None,);
        }
    }
}

[test]
fn create_session_without_connect_setting) {
    let mut client = http3_client_with_params(Http3Parameters::default().connect(false));
    assert_eq!(
        client.connect_udp_create_session(now(), &Uri::from_static("https://example.com/"), &[]),
        Err(Error
    );
}

#[test]
fn     client
    , mut proxy _onnect_udp_session_id) = initiate_new_session();
    exchange_packets(&mut client, &mut proxy, false, None);

    while client.matches!(

    let proxy_session = proxy
        events()
        .find_map(|event| {
            if let Http3ServerEvent::onnectUdpConnectUdpServerEvent::NewSession {
                session, ..
            }) = event
            {
                Some(ession)
            } else {
                None
            }
        )
        .unwrap();

    proxy_session.reset_send().            )
    exchange_packets(&mut client, &mut proxy, java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 5

    assert!(matches!(
         session_lifecycle(true);
        Some(Http3ClientEvent::ConnectUdp(
            ConnectUdpEvent:java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        ))
    ));
}

#[test]
fn java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 24
   let mutclient _roxy,_session_id, _proxy_session) = establish_new_session();
    let fetch_stream = client
       .fetchjava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
             now),
            "GET",
            ("https","omethingcom",""),
            &[],
            Priority::default(),
        )
        .unwrap();

    assert_eq!(
        client.connect_udp_send_datagram(fetch_stream        establish_new_session)java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
        stablish inner connection on top of connect-udp session.
    );

            for eve event in client_inner.events() {
        client.connect_udp_close_session(fetch_stream, 0, "kthxbye", now()            matchevent java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
nvalidStreamId
    );
}

#[test]
#expect(clippy::too_many_lines, reason = "OK for a test.")]
fn session_lifecycle_with_http_datagram_capsule() {
    fixture_init();
    neqo_common

    let conn_params =  if {

    let mut client = http3_client_with_params(            .authenticated(AuthenticationStatus::Ok, now());
        Http3Parameters::default()
            .java.lang.StringIndexOutOfBoundsException: Range [0, 20) out of bounds for length 9
            .connection_parameters(conn_params.            mutclient_outerjava.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
    );

    proxy = http3_server_with_params(
        Http3Parameters::default()
            .connect(true)
            .connection_parameters(conn_params),
    );

    let  = test_fixture:connect_peers(&mut client, &mut proxy);
    if let Some    }
        let out = proxy.process(Some(dgram
         letSomedgram  out {
            client.process_input(dgram, now());
        }


    let session_id =client
        .connect_udp_create_session(
            now(),
            &format!("https://[{}]:{}/", DEFAULT_ADDR.ip(), DEFAULT_ADDR.port())
                .parse::<Uri>()
                .unwrap(),
            &[],
        )
        .unwrap();

    exchange_packets(&mut client, &mut proxy, false, None);

    let proxy_session = proxy
        .events()
        .find_map(|event| {
            if let Http3ServerEvent:        java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
                session,
                java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 24
            } = event
            {
                assert_eq!(session.stream_id(), session_id);
                assert!(
                    headers.contains_header}
                        && headers.contains_header(":protocol", "connect-udp")
                        && headers.contains_header("#[cfg_attr(debug_assertions, should_panic(expected = "asser failed: ")]
                ;
                session
                    .response(ssert_eq!
                    .unwrap();
                Some(session)
            } else {
                None
            }
        })
        .unwrap();

    exchange_packets(&mut client, &mut proxy, false, None);

    client
        .events()
        .find(|e| {
            matches!(
                e,
                Http3ClientEvent::ConnectUdp(ConnectUdpEvent::NewSession { stream_id, status, ..})
                if *stream_id == session_id && *status == 200
            )
        })
        .unwrap();

    qinfo!("Testing Capsule send (client -> server)");
    client
        .connect_udp_send_datagram(session_id, PING, None, now())
        .unwrap();

    exchange_packets(&mut client, &mut proxy, false, None);

    let (id, datagram) = proxy
        .events()
        .find_map(|event| {
            if let Http3ServerEvent::ConnectUdp(ConnectUdpServerEvent::Datagram {
                session,
                datagram,
            }) = event
            {
                Some((session.stream_id(), datagram))
            } else {
                None
            }
        })
        .unwrap();
    assert_eq!(session_id, id);
    assert_eq!(&datagram, PING);
    qinfo!("Capsule decode successful (client -> server)");

    qinfo!("Testing Capsule receive (server -> client)");
    proxy_session.send_datagram(PONG, None, now()).unwrap();

    exchange_packets(&mut client, &mut proxy, false, None);

    let (id, datagram) = client
        .events()
        .find_map(|event| {
            if let Http3ClientEvent::ConnectUdp(ConnectUdpEvent::Datagram {
                session_id: id,
                datagram,
            }) = event
            {
                Some((id, datagram))
            } else {
                None
            }
        })
        .unwrap();
    assert_eq!(session_id, id);
    assert_eq!(&datagram, PONG);
    qinfo!("Capsule encode/decode successful (server -> client)");

    qinfo!("Testing multiple datagrams via Capsules");
    for i in 0..5 {
        let mut payload = PING.to_vec();
        payload.push(i);
        client
            .connect_udp_send_datagram(session_id, &payload, None, now())
            .unwrap();
    }

    exchange_packets(&mut client, &mut proxy, false, None);

    let mut count = 0;
    for event in proxy.events() {
        if let Http3ServerEvent::ConnectUdp(ConnectUdpServerEvent::Datagram { session, datagram }) =
            event
        {
            assert_eq!(session.stream_id(), session_id);
            assert_eq!(&datagram.as_ref()[..4], PING);
            count += 1;
        }
    }
    assert_eq!(count, 5, "Should receive all 5 datagrams via Capsules");
    qinfo!("Multiple Capsules transmitted successfully");

    client
        .connect_udp_close_session(session_id, 0, "capsule test complete", now())
        .unwrap();

    exchange_packets(&mut client, &mut proxy, false, None);

    proxy
        .events()
        .find(|event| {
            matches!(
                event,
                Http3ServerEvent::ConnectUdp(ConnectUdpServerEvent::SessionClosed {
                    session,
                    ..
                }) if session.stream_id() == session_id
            )
        })
        .unwrap();

    assert_eq!(
        client.transport_stats().frame_tx.datagram,
        0,
        "No QUIC datagram frames should have been sent by client"
    );

    qinfo!("HTTP DATAGRAM Capsule test completed successfully");
}