// nac-daemon/src/network.rs
// NAC 网络模块 - NAC_lens 协议节点发现和连接

use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct PeerInfo {
    pub node_id: String,
    pub address: String,
    pub port: u16,
    pub version: String,
    pub latency_ms: u64,
    pub connected: bool,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct NetworkStats {
    pub connected_peers: usize,
    pub total_known_peers: usize,
    pub inbound: usize,
    pub outbound: usize,
    pub bandwidth_in_kbps: f64,
    pub bandwidth_out_kbps: f64,
}

/// 获取已知引导节点列表（NAC_lens 协议）
pub fn get_bootstrap_nodes() -> Vec<PeerInfo> {
    vec![
        PeerInfo {
            node_id: "NAC_NODE_BOOTSTRAP_01".to_string(),
            address: "103.96.148.7".to_string(),
            port: 9090,
            version: "NAC_lens/4.0-alpha".to_string(),
            latency_ms: 0,
            connected: false,
        },
    ]
}

/// 检查节点连通性
pub fn ping_node(address: &str, port: u16) -> bool {
    use std::net::TcpStream;
    use std::time::Duration;
    TcpStream::connect_timeout(
        &format!("{}:{}", address, port).parse().expect("mainnet: handle error"),
        Duration::from_secs(2),
    ).is_ok()
}