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// Copyright (c) The Diem Core Contributors
// SPDX-License-Identifier: Apache-2.0

// Copyright 2021 Conflux Foundation. All rights reserved.
// Conflux is free software and distributed under GNU General Public License.
// See http://www.gnu.org/licenses/

//! Interface between State Sync and Network layers.

use crate::pos::state_sync::{
    chunk_request::GetChunkRequest, chunk_response::GetChunkResponse,
    error::Error,
};
use diem_types::PeerId;
/*use network::{
    peer_manager::{ConnectionRequestSender, PeerManagerRequestSender},
    protocols::network::{NetworkEvents, NetworkSender, NewNetworkSender},
    ProtocolId,
};*/
use serde::{Deserialize, Serialize};

/// State sync network messages
#[derive(Clone, Debug, Deserialize, Serialize)]
pub enum StateSyncMessage {
    GetChunkRequest(Box<GetChunkRequest>),
    GetChunkResponse(Box<GetChunkResponse>),
}

/*
/// The interface from Network to StateSync layer.
///
/// `StateSyncEvents` is a `Stream` of `PeerManagerNotification` where the
/// raw `Bytes` direct-send messages are deserialized into `StateSyncMessage`
/// types. `StateSyncEvents` is a thin wrapper around a
/// `channel::Receiver<PeerManagerNotification>`.
pub type StateSyncEvents = NetworkEvents<StateSyncMessage>;
*/

/// The interface from StateSync to Networking layer.
///
/// This is a thin wrapper around a `NetworkSender<StateSyncMessage>`, so it
/// is easy to clone and send off to a separate task. For example, the rpc
/// requests return Futures that encapsulate the whole flow, from sending the
/// request to remote, to finally receiving the response and deserializing. It
/// therefore makes the most sense to make the rpc call on a separate async
/// task, which requires the `StateSyncSender` to be `Clone` and `Send`.
#[derive(Clone)]
pub struct StateSyncSender {
    //inner: NetworkSender<StateSyncMessage>,
}

/*
impl NewNetworkSender for StateSyncSender {
    fn new(
        peer_mgr_reqs_tx: PeerManagerRequestSender,
        connection_reqs_tx: ConnectionRequestSender,
    ) -> Self {
        Self {
            inner: NetworkSender::new(peer_mgr_reqs_tx, connection_reqs_tx),
        }
    }
}*/

impl StateSyncSender {
    pub fn send_to(
        &mut self, _recipient: PeerId, _message: StateSyncMessage,
    ) -> Result<(), Error> {
        Ok(())
        /*let protocol = ProtocolId::StateSyncDirectSend;
        Ok(self.inner.send_to(recipient, protocol, message)?)*/
    }
}

/*
/// Configuration for the network endpoints to support state sync.
pub fn network_endpoint_config() -> (
    Vec<ProtocolId>,
    Vec<ProtocolId>,
    QueueStyle,
    usize,
    Option<&'static IntCounterVec>,
) {
    (
        vec![],
        vec![ProtocolId::StateSyncDirectSend],
        QueueStyle::LIFO,
        STATE_SYNC_MAX_BUFFER_SIZE,
        Some(&counters::PENDING_STATE_SYNC_NETWORK_EVENTS),
    )
}
*/