use clap::Parser;
#[cfg(target_os = "linux")]
use lanparty_gateway::PacketSocket;
use lanparty_gateway::{GatewayArgs, connect_gateway};

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    let config = GatewayArgs::parse().into_config()?;
    println!(
        "lanparty-gateway connecting interface {} to relay {} room {}",
        config.interface(),
        config.relay_addr(),
        config.room()
    );

    let gateway = connect_gateway(config).await?;
    println!(
        "lanparty-gateway connected as peer {} in room id {} with TAP MTU {} over {}",
        gateway.welcome().peer_id(),
        gateway.welcome().room_id(),
        gateway.welcome().effective_tap_mtu(),
        gateway.welcome().mode()
    );
    #[cfg(target_os = "linux")]
    {
        let socket = PacketSocket::open(gateway.config().interface())?;
        println!(
            "lanparty-gateway opened AF_PACKET socket on {} (ifindex {})",
            socket.interface(),
            socket.interface_index()
        );
        println!("lanparty-gateway bridging frames; press Ctrl-C to stop");
        gateway.bridge_until_shutdown(socket).await?;
    }
    #[cfg(not(target_os = "linux"))]
    anyhow::bail!("lanparty-gateway requires Linux AF_PACKET support");

    Ok(())
}