//  Copyright 2021, The Tari Project
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use tari_test_utils::unpack_enum;
use tokio::task;

use crate::{
    framing,
    memsocket::MemorySocket,
    protocol::rpc::{
        Handshake,
        error::HandshakeRejectReason,
        handshake::{RpcHandshakeError, SUPPORTED_RPC_VERSIONS},
    },
};

#[tokio::test]
async fn it_performs_the_handshake() {
    let (client, server) = MemorySocket::new_pair();

    let handshake_result = task::spawn(async move {
        let mut server_framed = framing::canonical(server, 1024);
        let mut handshake_server = Handshake::new(&mut server_framed);
        handshake_server.perform_server_handshake().await
    });

    let mut client_framed = framing::canonical(client, 1024);
    let mut handshake_client = Handshake::new(&mut client_framed);

    handshake_client.perform_client_handshake().await.unwrap();
    let v = handshake_result.await.unwrap().unwrap();
    assert!(SUPPORTED_RPC_VERSIONS.contains(&v));
}

#[tokio::test]
async fn it_rejects_the_handshake() {
    let (client, server) = MemorySocket::new_pair();

    let mut client_framed = framing::canonical(client, 1024);
    let mut handshake_client = Handshake::new(&mut client_framed);

    let mut server_framed = framing::canonical(server, 1024);
    let mut handshake_server = Handshake::new(&mut server_framed);
    handshake_server
        .reject_with_reason(HandshakeRejectReason::NoServerSessionsAvailable("some reason"))
        .await
        .unwrap();

    let err = handshake_client.perform_client_handshake().await.unwrap_err();
    unpack_enum!(RpcHandshakeError::Rejected(reason) = err);
    unpack_enum!(HandshakeRejectReason::NoServerSessionsAvailable("session limit reached") = reason);
}
