//! navka-client – forward keyboard/mouse HID reports to navka-server
#![forbid(unsafe_code)]

use anyhow::Result;
use navka_common::navka::{relay_client::RelayClient, HidReport};
use tokio::{sync::mpsc, time::sleep};
use tokio_stream::wrappers::ReceiverStream;
use tonic::{transport::Channel, Request};

#[tokio::main]
async fn main() -> Result<()> {
    tracing_subscriber::fmt::init();

    // -- server address comes from CLI arg, env or falls back to localhost
    let addr = std::env::args()
        .nth(1)
        .or_else(|| std::env::var("NAVKA_SERVER_ADDR").ok())
        .unwrap_or_else(|| "http://127.0.0.1:50051".to_owned());

    let channel: Channel = Channel::from_shared(addr)?
        .connect()
        .await?;

    // mpsc  -> ReceiverStream  -> bidirectional gRPC
    let (tx, rx) = mpsc::channel::<HidReport>(32);
    let outbound = ReceiverStream::new(rx);
    let mut inbound = RelayClient::new(channel)
        .stream(Request::new(outbound))
        .await?
        .into_inner();

    // demo: press & release ‘a’
    tokio::spawn(async move {
        let press_a = HidReport { data: vec![0, 0, 0x04, 0, 0, 0, 0, 0] };
        let release = HidReport { data: vec![0; 8] };
        tx.send(press_a).await.ok();
        sleep(std::time::Duration::from_millis(100)).await;
        tx.send(release).await.ok();
    });

    while let Some(report) = inbound.message().await? {
        tracing::info!(bytes=?report.data, "echo from server");
    }
    Ok(())
}