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use std::net::{SocketAddr, ToSocketAddrs};

use once_cell::sync::Lazy;

use melstructs::{Checkpoint, NetID};

/// DNS seed
static MAINNET_DNS_SEEDS: Lazy<Vec<SocketAddr>> = Lazy::new(|| {
    "mainnet.p2p-bootstrap.melproject.org:41814"
        .to_socket_addrs()
        .map(|iter| iter.collect::<Vec<_>>())
        .unwrap_or_default()
});

/// DNS seed
static TESTNET_DNS_SEEDS: Lazy<Vec<SocketAddr>> = Lazy::new(|| {
    "testnet.p2p-bootstrap.melproject.org:41814"
        .to_socket_addrs()
        .map(|iter| iter.collect::<Vec<_>>())
        .unwrap_or_default()
});

/// Obtains bootstrap nodes for a given NetID.
pub fn bootstrap_routes(network: NetID) -> Vec<SocketAddr> {
    match network {
        NetID::Mainnet => MAINNET_DNS_SEEDS.clone(),
        NetID::Testnet => TESTNET_DNS_SEEDS.clone(),
        _ => vec![],
    }
}

/// Obtains a checkpoint for a given NetID.
pub fn checkpoint_height(network: NetID) -> Option<Checkpoint> {
    match network {
        NetID::Mainnet => Some(
            "2205793:08c5e01e8549cb9cad0b03562ee694f713c53ceb135e1b03b8043da4ac2aae44"
                .parse()
                .unwrap(),
        ),
        NetID::Testnet => Some(
            "2:37dc9fdefd1b58b332ac70bf2e78dd6aaa0980de5168be786f136d0fedf228a1"
                .parse()
                .unwrap(),
        ),
        _ => None,
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn get_bootstrap() {
        assert!(!bootstrap_routes(NetID::Mainnet).is_empty());
        assert!(!bootstrap_routes(NetID::Testnet).is_empty());
    }
}