// file: crates/ksp-onchain-transport-lib/unit_tests/ws_helius_standard.rs
// version: 1

use futures_util::SinkExt; // rust-rules: trait-import
use futures_util::StreamExt; // rust-rules: trait-import

fn helius_endpoint(url: &str) -> crate::WsEndpointSettings {
    return crate::WsEndpointSettings::new(
        "local_helius_standard_fixture",
        true,
        crate::WsProviderName::new("helius"),
        crate::WsClusterName::new("local"),
        crate::WsProtocolKind::HeliusLaserStream,
        crate::WsEndpointUrl::parse(url).expect("local Helius WebSocket URL must parse"),
        crate::WsSessionSettings::default(),
    );
}

async fn bind_local_listener() -> (tokio::net::TcpListener, std::string::String) {
    let listener = tokio::net::TcpListener::bind("127.0.0.1:0").await.expect("local listener must bind");
    let address = listener.local_addr().expect("local listener must expose address");
    return (listener, format!("ws://{address}"));
}

async fn read_request(websocket: &mut tokio_tungstenite::WebSocketStream<tokio::net::TcpStream>) -> serde_json::Value {
    let message = websocket.next().await.expect("request message must exist").expect("request message must decode");
    let text = message.to_text().expect("request must be text");
    return serde_json::from_str(text).expect("request must contain JSON");
}

async fn send_result(websocket: &mut tokio_tungstenite::WebSocketStream<tokio::net::TcpStream>, request: &serde_json::Value, result: serde_json::Value) {
    let id = request.get("id").and_then(serde_json::Value::as_u64).expect("request id must be numeric");
    let response = serde_json::json!({"jsonrpc":"2.0","id":id,"result":result});
    websocket.send(tokio_tungstenite::tungstenite::Message::Text(response.to_string().into())).await.expect("local response must send");
}

async fn expect_pair(
    websocket: &mut tokio_tungstenite::WebSocketStream<tokio::net::TcpStream>,
    subscribe_method: &str,
    expected_params: serde_json::Value,
    unsubscribe_method: &str,
    remote_id: u64,
) {
    let subscribe = read_request(websocket).await;
    assert_eq!(subscribe["method"], serde_json::Value::String(subscribe_method.to_owned()));
    assert_eq!(subscribe["params"], expected_params);
    send_result(websocket, &subscribe, serde_json::json!(remote_id)).await;
    let unsubscribe = read_request(websocket).await;
    assert_eq!(unsubscribe["method"], serde_json::Value::String(unsubscribe_method.to_owned()));
    assert_eq!(unsubscribe["params"], serde_json::json!([remote_id]));
    send_result(websocket, &unsubscribe, serde_json::json!(true)).await;
}

async fn wait_for_close_frame(websocket: &mut tokio_tungstenite::WebSocketStream<tokio::net::TcpStream>) {
    loop {
        let message = websocket.next().await;
        match message {
            std::option::Option::Some(std::result::Result::Ok(tokio_tungstenite::tungstenite::Message::Close(_))) => return,
            std::option::Option::Some(std::result::Result::Ok(_)) => {},
            std::option::Option::Some(std::result::Result::Err(_)) | std::option::Option::None => return,
        }
    }
}

#[tokio::test(flavor = "current_thread")]
async fn helius_facade_reuses_exact_standard_wire_for_all_six_supported_families() {
    let (listener, url) = bind_local_listener().await;
    let server = tokio::spawn(async move {
        let (stream, _) = listener.accept().await.expect("local server must accept client");
        let mut websocket = tokio_tungstenite::accept_async(stream).await.expect("local WebSocket handshake must succeed");
        expect_pair(
            &mut websocket,
            "accountSubscribe",
            serde_json::json!(["11111111111111111111111111111111", {"encoding":"base64","commitment":"confirmed"}]),
            "accountUnsubscribe",
            101,
        )
        .await;
        expect_pair(
            &mut websocket,
            "programSubscribe",
            serde_json::json!(["11111111111111111111111111111111", {"encoding":"jsonParsed","filters":[{"dataSize":80}],"withContext":true}]),
            "programUnsubscribe",
            102,
        )
        .await;
        expect_pair(&mut websocket, "logsSubscribe", serde_json::json!(["all", {"commitment":"finalized"}]), "logsUnsubscribe", 103).await;
        expect_pair(
            &mut websocket,
            "signatureSubscribe",
            serde_json::json!(["fixture-signature", {"commitment":"confirmed","enableReceivedNotification":true}]),
            "signatureUnsubscribe",
            104,
        )
        .await;
        expect_pair(&mut websocket, "slotSubscribe", serde_json::json!([]), "slotUnsubscribe", 105).await;
        expect_pair(&mut websocket, "rootSubscribe", serde_json::json!([]), "rootUnsubscribe", 106).await;
        wait_for_close_frame(&mut websocket).await;
    });
    let session = crate::HeliusLaserStreamWsSession::connect(helius_endpoint(url.as_str())).await.expect("Helius facade must connect");
    let pubkey = "11111111111111111111111111111111".parse::<ksp_core_lib::Pubkey>().expect("fixture pubkey must parse");
    let account_config = crate::SolanaAccountSubscribeConfig::new(
        std::option::Option::Some(crate::SolanaAccountEncoding::Base64),
        std::option::Option::None,
        std::option::Option::Some(crate::SolanaCommitment::Confirmed),
    );
    let mut account = session.account_subscribe(&pubkey, std::option::Option::Some(&account_config)).await.expect("Helius accountSubscribe must register");
    assert!(account.unsubscribe().await.expect("Helius accountUnsubscribe must complete"));
    let program_config = crate::SolanaProgramSubscribeConfig::new(
        crate::SolanaAccountSubscribeConfig::new(
            std::option::Option::Some(crate::SolanaAccountEncoding::JsonParsed),
            std::option::Option::None,
            std::option::Option::None,
        ),
        std::vec![crate::SolanaProgramAccountFilter::DataSize(80)],
        std::option::Option::Some(true),
    );
    let mut program = session.program_subscribe(&pubkey, std::option::Option::Some(&program_config)).await.expect("Helius programSubscribe must register");
    assert!(program.unsubscribe().await.expect("Helius programUnsubscribe must complete"));
    let logs_config = crate::SolanaCommitmentConfig::new(std::option::Option::Some(crate::SolanaCommitment::Finalized));
    let mut logs = session
        .logs_subscribe(&crate::SolanaLogsSubscribeFilter::All, std::option::Option::Some(&logs_config))
        .await
        .expect("Helius logsSubscribe must register");
    assert!(logs.unsubscribe().await.expect("Helius logsUnsubscribe must complete"));
    let signature_config =
        crate::SolanaSignatureSubscribeConfig::new(std::option::Option::Some(crate::SolanaCommitment::Confirmed), std::option::Option::Some(true));
    let mut signature = session
        .signature_subscribe("fixture-signature", std::option::Option::Some(&signature_config))
        .await
        .expect("Helius signatureSubscribe must register");
    assert!(signature.unsubscribe().await.expect("Helius signatureUnsubscribe must complete"));
    let mut slot = session.slot_subscribe().await.expect("Helius slotSubscribe must register");
    assert!(slot.unsubscribe().await.expect("Helius slotUnsubscribe must complete"));
    let mut root = session.root_subscribe().await.expect("Helius rootSubscribe must register");
    assert!(root.unsubscribe().await.expect("Helius rootUnsubscribe must complete"));
    session.close().await.expect("Helius facade close must complete");
    server.await.expect("local Helius peer task must complete");
}