use std::sync::Arc;

use futures::{channel::mpsc, StreamExt};
use tokio::sync::{broadcast, Semaphore};
use tower::{Service, ServiceExt};

use cuprate_helper::network::Network;
use monero_wire::{common::PeerSupportFlags, BasicNodeData};

use monero_p2p::{
    client::{ConnectRequest, Connector, DoHandshakeRequest, HandShaker},
    network_zones::ClearNet,
    ConnectionDirection,
};

use cuprate_test_utils::{
    monerod::monerod,
    test_netzone::{TestNetZone, TestNetZoneAddr},
};
use monero_p2p::client::InternalPeerID;

mod utils;
use utils::*;

#[tokio::test]
async fn handshake_cuprate_to_cuprate() {
    // Tests a Cuprate <-> Cuprate handshake by making 2 handshake services and making them talk to
    // each other.

    let (broadcast_tx, _) = broadcast::channel(1); // this isn't actually used in this test.
    let semaphore = Arc::new(Semaphore::new(10));
    let permit_1 = semaphore.clone().acquire_owned().await.unwrap();
    let permit_2 = semaphore.acquire_owned().await.unwrap();

    let our_basic_node_data_1 = BasicNodeData {
        my_port: 0,
        network_id: Network::Mainnet.network_id().into(),
        peer_id: 87980,
        // TODO: This fails if the support flags are empty (0)
        support_flags: PeerSupportFlags::from(1_u32),
        rpc_port: 0,
        rpc_credits_per_hash: 0,
    };
    // make sure both node IDs are different
    let mut our_basic_node_data_2 = our_basic_node_data_1.clone();
    our_basic_node_data_2.peer_id = 2344;

    let mut handshaker_1 = HandShaker::<TestNetZone<true, true, true>, _, _, _>::new(
        DummyAddressBook,
        DummyCoreSyncSvc,
        DummyPeerRequestHandlerSvc,
        broadcast_tx.clone(),
        our_basic_node_data_1,
    );

    let mut handshaker_2 = HandShaker::<TestNetZone<true, true, true>, _, _, _>::new(
        DummyAddressBook,
        DummyCoreSyncSvc,
        DummyPeerRequestHandlerSvc,
        broadcast_tx.clone(),
        our_basic_node_data_2,
    );

    let (p1_sender, p2_receiver) = mpsc::channel(5);
    let (p2_sender, p1_receiver) = mpsc::channel(5);

    let p1_handshake_req = DoHandshakeRequest {
        addr: InternalPeerID::KnownAddr(TestNetZoneAddr(888)),
        peer_stream: p2_receiver.map(Ok).boxed(),
        peer_sink: p2_sender.into(),
        direction: ConnectionDirection::OutBound,
        permit: permit_1,
    };

    let p2_handshake_req = DoHandshakeRequest {
        addr: InternalPeerID::KnownAddr(TestNetZoneAddr(444)),
        peer_stream: p1_receiver.boxed().map(Ok).boxed(),
        peer_sink: p1_sender.into(),
        direction: ConnectionDirection::InBound,
        permit: permit_2,
    };

    let p1 = tokio::spawn(async move {
        handshaker_1
            .ready()
            .await
            .unwrap()
            .call(p1_handshake_req)
            .await
            .unwrap()
    });

    let p2 = tokio::spawn(async move {
        handshaker_2
            .ready()
            .await
            .unwrap()
            .call(p2_handshake_req)
            .await
            .unwrap()
    });

    let (res1, res2) = futures::join!(p1, p2);
    res1.unwrap();
    res2.unwrap();
}

#[tokio::test]
async fn handshake_cuprate_to_monerod() {
    let (broadcast_tx, _) = broadcast::channel(1); // this isn't actually used in this test.
    let semaphore = Arc::new(Semaphore::new(10));
    let permit = semaphore.acquire_owned().await.unwrap();

    let (monerod, _) = monerod(
        vec!["--fixed-difficulty=1".into(), "--out-peers=0".into()],
        false,
    )
    .await;

    let our_basic_node_data = BasicNodeData {
        my_port: 0,
        network_id: Network::Mainnet.network_id().into(),
        peer_id: 87980,
        support_flags: PeerSupportFlags::from(1_u32),
        rpc_port: 0,
        rpc_credits_per_hash: 0,
    };

    let handshaker = HandShaker::<ClearNet, _, _, _>::new(
        DummyAddressBook,
        DummyCoreSyncSvc,
        DummyPeerRequestHandlerSvc,
        broadcast_tx,
        our_basic_node_data,
    );

    let mut connector = Connector::new(handshaker);

    connector
        .ready()
        .await
        .unwrap()
        .call(ConnectRequest {
            addr: monerod,
            permit,
        })
        .await
        .unwrap();
}