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// use std::{
// collections::HashMap,
// pin::Pin,
// sync::{Arc, Mutex},
// };
// use anyhow::{bail, Context, Result};
// use futures::SinkExt;
// use graphql_client::GraphQLQuery;
// use httparse::Header;
// use hyper::http::HeaderValue;
// use serde::{Deserialize, Serialize};
// use serde_json::json;
// use tokio::sync::{
// broadcast::{self, Sender},
// mpsc, oneshot,
// };
// use tokio_stream::{wrappers::BroadcastStream, Stream, StreamExt};
// use tokio_tungstenite::{
// connect_async,
// tungstenite::{client::IntoClientRequest, Message},
// };
// use url::Url;
// use uuid::Uuid;
// use crate::commands::Configs;
// /// Subscription GraphQL response, returned from an active stream.
// pub type BoxedSubscription<T> = Pin<
// Box<
// dyn Stream<Item = Option<graphql_client::Response<<T as GraphQLQuery>::ResponseData>>>
// + Send
// + Sync,
// >,
// >;
// /// Payload contains the raw data received back from a GraphQL subscription. At the point
// /// of receiving data, the only known fields are { id, type }; what's contained inside the
// /// `payload` field is unknown until we attempt to deserialize it against a generated
// /// GraphQLQuery::ResponseData later.
// #[derive(Serialize, Deserialize, Debug, Clone)]
// pub struct Payload {
// id: Uuid,
// #[serde(rename = "type")]
// payload_type: String,
// payload: serde_json::Value,
// }
// impl Payload {
// /// Returns an "init" payload to confirm the connection to the server.
// pub fn init(id: Uuid) -> Self {
// Self {
// id,
// payload_type: "connection_init".to_owned(),
// payload: json!({}),
// }
// }
// /// Returns a "start" payload necessary for starting a new subscription.
// pub fn start<T: GraphQLQuery + Send + Sync>(
// id: Uuid,
// payload: &graphql_client::QueryBody<T::Variables>,
// ) -> Self {
// Self {
// id,
// payload_type: "start".to_owned(),
// payload: json!(payload),
// }
// }
// /// Returns a "stop" payload for terminating the subscription in the GraphQL server.
// fn stop(id: Uuid) -> Self {
// Self {
// id,
// payload_type: "stop".to_owned(),
// payload: serde_json::Value::Null,
// }
// }
// /// Attempts to return a definitive ResponseData on the `payload` field, matched against
// /// a generated `GraphQLQuery`.
// fn response<T: GraphQLQuery + Send + Sync>(
// &self,
// ) -> Option<graphql_client::Response<T::ResponseData>> {
// serde_json::from_value::<graphql_client::Response<T::ResponseData>>(self.payload.clone())
// .ok()
// }
// }
// /// A single `SubscriptionClient` enables subscription multiplexing.
// #[derive(Debug)]
// pub struct SubscriptionClient {
// tx: mpsc::UnboundedSender<Payload>,
// subscriptions: Arc<Mutex<HashMap<Uuid, Sender<Payload>>>>,
// _shutdown_tx: oneshot::Sender<()>,
// }
// impl SubscriptionClient {
// /// Create a new subscription client. `tx` is a channel for sending `Payload`s to the
// /// GraphQL server; `rx` is a channel for `Payload` back.
// fn new(tx: mpsc::UnboundedSender<Payload>, mut rx: mpsc::UnboundedReceiver<Payload>) -> Self {
// // Oneshot channel for cancelling the listener if SubscriptionClient is dropped
// let (_shutdown_tx, mut shutdown_rx) = oneshot::channel::<()>();
// let subscriptions = Arc::new(Mutex::new(HashMap::new()));
// let subscriptions_clone = Arc::clone(&subscriptions);
// // Spawn a handler for shutdown, and relaying received `Payload`s back to the relevant
// // subscription.
// let tx_clone = tx.clone();
// tokio::spawn(async move {
// loop {
// tokio::select! {
// // Break the loop if shutdown is triggered. This happens implicitly once
// // the client goes out of scope
// _ = &mut shutdown_rx => {
// let subscriptions = subscriptions_clone.lock().unwrap();
// for id in subscriptions.keys() {
// let _ = tx_clone.send(Payload::stop(*id));
// }
// break
// },
// // Handle receiving payloads back _from_ the server
// message = rx.recv() => {
// match message {
// Some(p) => {
// let subscriptions = subscriptions_clone.lock().unwrap();
// let s: Option<&Sender<Payload>> = subscriptions.get::<Uuid>(&p.id);
// if let Some(s) = s {
// let _ = s.send(p);
// }
// }
// None => {
// subscriptions_clone.lock().unwrap().clear();
// break;
// },
// }
// }
// }
// }
// });
// Self {
// tx,
// subscriptions,
// _shutdown_tx,
// }
// }
// /// Start a new subscription request.
// pub fn start<T: GraphQLQuery + Send + Sync>(
// &self,
// request_body: &graphql_client::QueryBody<T::Variables>,
// ) -> BoxedSubscription<T>
// where
// T: GraphQLQuery + Send + Sync,
// <T as GraphQLQuery>::ResponseData: Unpin + Send + Sync + 'static,
// {
// // Generate a unique ID for the subscription. Subscriptions can be multiplexed
// // over a single connection, so we'll keep a copy of this against the client to
// // handling routing responses back to the relevant subscriber.
// let id = Uuid::new_v4();
// let (tx, rx) = broadcast::channel::<Payload>(100);
// self.subscriptions.lock().unwrap().insert(id, tx);
// // Initialize the connection with the relevant control messages.
// let _ = self.tx.send(Payload::init(id));
// let _ = self.tx.send(Payload::start::<T>(id, request_body));
// Box::pin(
// BroadcastStream::new(rx)
// .filter(Result::is_ok)
// .map(|p| p.unwrap().response::<T>()),
// )
// }
// }
// /// Connect to a new WebSocket GraphQL server endpoint, and return a `SubscriptionClient`.
// /// This method will a) connect to a ws(s):// endpoint, and perform the initial handshake, and b)
// /// set up channel forwarding to expose just the returned `Payload`s to the client.
// pub async fn connect_subscription_client(
// configs: &Configs,
// url: Url,
// ) -> Result<SubscriptionClient> {
// let Some(token) = configs.root_config.user.token.clone() else {
// bail!("Unauthorized. Please login with `railway login`")
// };
// let bearer = format!("Bearer {}", token);
// let mut request = "wss://backboard.railway.app/graphql/v2".into_client_request()?;
// // request.headers_mut().insert(
// // "Sec-WebSocket-Protocol",
// // HeaderValue::from_str("graphql-transport-ws")?,
// // );
// // request
// // .headers_mut()
// // .insert("Sec-WebSocket-Version", HeaderValue::from_str("13")?);
// // request.headers_mut().insert(
// // "Sec-WebSocket-Key",
// // HeaderValue::from_str("dGhlIHNhbXBsZSBub25jZQ==")?,
// // );
// // request
// // .headers_mut()
// // .insert("Origin", HeaderValue::from_str("https://railway.app")?);
// // request
// // .headers_mut()
// // .insert("Sec-Fetch-Mode", HeaderValue::from_str("websocket")?);
// let (ws, _) = connect_async(request).await?;
// let (mut ws_tx, mut ws_rx) = futures::StreamExt::split(ws);
// let (send_tx, mut send_rx) = mpsc::unbounded_channel::<Payload>();
// let (recv_tx, recv_rx) = mpsc::unbounded_channel::<Payload>();
// // Forwarded received messages back upstream to the GraphQL server
// tokio::spawn(async move {
// while let Some(p) = send_rx.recv().await {
// dbg!("Sending payload: {:?}", &p);
// let _ = ws_tx
// .send(Message::Text(serde_json::to_string(&p).unwrap()))
// .await;
// }
// });
// // Forward received messages to the receiver channel.
// tokio::spawn(async move {
// while let Some(Ok(Message::Text(m))) = ws_rx.next().await {
// dbg!(&m);
// if let Ok(p) = serde_json::from_str::<Payload>(&m) {
// let _ = recv_tx.send(p);
// }
// }
// });
// Ok(SubscriptionClient::new(send_tx, recv_rx))
// }