//  Copyright 2019 The Tari Project
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use std::{
    env::current_dir,
    fs,
    net::{Ipv4Addr, SocketAddr},
    path::Path,
};

/// Generates a random node identity JSON file. A node identity contains a node's public and secret keys, it's node
/// id and an address used to establish peer connections. The files generated from this example are used to
/// populate the peer manager in other examples.
use clap::{App, Arg};
use rand::{rngs::OsRng, Rng};
use tari_comms::{
    multiaddr::Multiaddr,
    peer_manager::{NodeIdentity, PeerFeatures},
    utils::multiaddr::socketaddr_to_multiaddr,
};
use tari_utilities::message_format::MessageFormat;

fn random_address() -> Multiaddr {
    let port = OsRng.gen_range(9000..std::u16::MAX);
    let socket_addr: SocketAddr = (Ipv4Addr::LOCALHOST, port).into();
    socketaddr_to_multiaddr(&socket_addr)
}

fn to_abs_path(path: &str) -> String {
    let path = Path::new(path);
    if path.is_absolute() {
        path.to_str().unwrap().to_string()
    } else {
        let mut abs_path = current_dir().unwrap();
        abs_path.push(path);
        abs_path.to_str().unwrap().to_string()
    }
}

fn main() {
    let matches = App::new("Peer file generator")
        .version("1.0")
        .about("Generates peer json files")
        .arg(
            Arg::with_name("output")
                .value_name("FILE")
                .long("output")
                .short('o')
                .help("The relative path of the file to output")
                .takes_value(true)
                .required(true),
        )
        .get_matches();

    let address = random_address();
    let node_identity = NodeIdentity::random(&mut OsRng, address, PeerFeatures::COMMUNICATION_NODE);
    let json = node_identity.to_json().unwrap();
    let out_path = to_abs_path(matches.value_of("output").unwrap());
    fs::write(out_path, json).unwrap();
}