// Copyright 2019 Parity Technologies (UK) Ltd.
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//! Integration tests for the `Ping` network behaviour.

use libp2p_ping as ping;
use libp2p_swarm::dummy;
use libp2p_swarm::{Swarm, SwarmEvent};
use libp2p_swarm_test::SwarmExt;
use quickcheck::*;
use std::{num::NonZeroU8, time::Duration};

#[test]
fn ping_pong() {
    fn prop(count: NonZeroU8) {
        let cfg = ping::Config::new().with_interval(Duration::from_millis(10));

        let mut swarm1 = Swarm::new_ephemeral(|_| ping::Behaviour::new(cfg.clone()));
        let mut swarm2 = Swarm::new_ephemeral(|_| ping::Behaviour::new(cfg.clone()));

        async_std::task::block_on(async {
            swarm1.listen().with_memory_addr_external().await;
            swarm2.connect(&mut swarm1).await;

            for _ in 0..count.get() {
                let ([e1], [e2]): ([ping::Event; 1], [ping::Event; 1]) =
                    libp2p_swarm_test::drive(&mut swarm1, &mut swarm2).await;

                assert_eq!(&e1.peer, swarm2.local_peer_id());
                assert_eq!(&e2.peer, swarm1.local_peer_id());

                assert_ping_rtt_less_than_50ms(e1);
                assert_ping_rtt_less_than_50ms(e2);
            }
        });
    }

    QuickCheck::new().tests(10).quickcheck(prop as fn(_))
}

fn assert_ping_rtt_less_than_50ms(e: ping::Event) {
    let rtt = e.result.expect("a ping success");

    assert!(rtt < Duration::from_millis(50))
}

#[test]
fn unsupported_doesnt_fail() {
    let mut swarm1 = Swarm::new_ephemeral(|_| dummy::Behaviour);
    let mut swarm2 = Swarm::new_ephemeral(|_| ping::Behaviour::new(ping::Config::new()));

    let result = async_std::task::block_on(async {
        swarm1.listen().with_memory_addr_external().await;
        swarm2.connect(&mut swarm1).await;
        let swarm1_peer_id = *swarm1.local_peer_id();
        async_std::task::spawn(swarm1.loop_on_next());

        loop {
            match swarm2.next_swarm_event().await {
                SwarmEvent::Behaviour(ping::Event {
                    result: Err(ping::Failure::Unsupported),
                    ..
                }) => {
                    swarm2.disconnect_peer_id(swarm1_peer_id).unwrap();
                }
                SwarmEvent::ConnectionClosed { cause: Some(e), .. } => {
                    break Err(e);
                }
                SwarmEvent::ConnectionClosed { cause: None, .. } => {
                    break Ok(());
                }
                _ => {}
            }
        }
    });

    result.expect("node with ping should not fail connection due to unsupported protocol");
}