use crate::crds_value::MAX_WALLCLOCK;
use solana_sdk::pubkey::Pubkey;
#[cfg(test)]
use solana_sdk::rpc_port;
use solana_sdk::sanitize::{Sanitize, SanitizeError};
#[cfg(test)]
use solana_sdk::signature::{Keypair, Signer};
use solana_sdk::timing::timestamp;
use std::cmp::{Ord, Ordering, PartialEq, PartialOrd};
use std::net::{IpAddr, SocketAddr};

/// Structure representing a node on the network
#[derive(Serialize, Deserialize, Clone, Debug, AbiExample)]
pub struct ContactInfo {
    pub id: Pubkey,
    /// gossip address
    pub gossip: SocketAddr,
    /// address to connect to for replication
    pub tvu: SocketAddr,
    /// address to forward shreds to
    pub tvu_forwards: SocketAddr,
    /// address to send repair responses to
    pub repair: SocketAddr,
    /// transactions address
    pub tpu: SocketAddr,
    /// address to forward unprocessed transactions to
    pub tpu_forwards: SocketAddr,
    /// address to which to send bank state requests
    pub unused: SocketAddr,
    /// address to which to send JSON-RPC requests
    pub rpc: SocketAddr,
    /// websocket for JSON-RPC push notifications
    pub rpc_pubsub: SocketAddr,
    /// address to send repair requests to
    pub serve_repair: SocketAddr,
    /// latest wallclock picked
    pub wallclock: u64,
    /// node shred version
    pub shred_version: u16,
}

impl Sanitize for ContactInfo {
    fn sanitize(&self) -> std::result::Result<(), SanitizeError> {
        if self.wallclock >= MAX_WALLCLOCK {
            return Err(SanitizeError::ValueOutOfBounds);
        }
        Ok(())
    }
}

impl Ord for ContactInfo {
    fn cmp(&self, other: &Self) -> Ordering {
        self.id.cmp(&other.id)
    }
}

impl PartialOrd for ContactInfo {
    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
        Some(self.cmp(other))
    }
}

impl PartialEq for ContactInfo {
    fn eq(&self, other: &Self) -> bool {
        self.id == other.id
    }
}

impl Eq for ContactInfo {}

#[macro_export]
macro_rules! socketaddr {
    ($ip:expr, $port:expr) => {
        std::net::SocketAddr::from((std::net::Ipv4Addr::from($ip), $port))
    };
    ($str:expr) => {{
        let a: std::net::SocketAddr = $str.parse().unwrap();
        a
    }};
}
#[macro_export]
macro_rules! socketaddr_any {
    () => {
        socketaddr!(0, 0)
    };
}

impl Default for ContactInfo {
    fn default() -> Self {
        ContactInfo {
            id: Pubkey::default(),
            gossip: socketaddr_any!(),
            tvu: socketaddr_any!(),
            tvu_forwards: socketaddr_any!(),
            repair: socketaddr_any!(),
            tpu: socketaddr_any!(),
            tpu_forwards: socketaddr_any!(),
            unused: socketaddr_any!(),
            rpc: socketaddr_any!(),
            rpc_pubsub: socketaddr_any!(),
            serve_repair: socketaddr_any!(),
            wallclock: 0,
            shred_version: 0,
        }
    }
}

impl ContactInfo {
    pub fn new_localhost(id: &Pubkey, now: u64) -> Self {
        Self {
            id: *id,
            gossip: socketaddr!("127.0.0.1:1234"),
            tvu: socketaddr!("127.0.0.1:1235"),
            tvu_forwards: socketaddr!("127.0.0.1:1236"),
            repair: socketaddr!("127.0.0.1:1237"),
            tpu: socketaddr!("127.0.0.1:1238"),
            tpu_forwards: socketaddr!("127.0.0.1:1239"),
            unused: socketaddr!("127.0.0.1:1240"),
            rpc: socketaddr!("127.0.0.1:1241"),
            rpc_pubsub: socketaddr!("127.0.0.1:1242"),
            serve_repair: socketaddr!("127.0.0.1:1243"),
            wallclock: now,
            shred_version: 0,
        }
    }

    /// New random ContactInfo for tests and simulations.
    pub(crate) fn new_rand<R: rand::Rng>(rng: &mut R, pubkey: Option<Pubkey>) -> Self {
        let delay = 10 * 60 * 1000; // 10 minutes
        let now = timestamp() - delay + rng.gen_range(0, 2 * delay);
        let pubkey = pubkey.unwrap_or_else(solana_sdk::pubkey::new_rand);
        ContactInfo::new_localhost(&pubkey, now)
    }

    #[cfg(test)]
    /// ContactInfo with multicast addresses for adversarial testing.
    pub fn new_multicast() -> Self {
        let addr = socketaddr!("224.0.1.255:1000");
        assert!(addr.ip().is_multicast());
        Self {
            id: solana_sdk::pubkey::new_rand(),
            gossip: addr,
            tvu: addr,
            tvu_forwards: addr,
            repair: addr,
            tpu: addr,
            tpu_forwards: addr,
            unused: addr,
            rpc: addr,
            rpc_pubsub: addr,
            serve_repair: addr,
            wallclock: 0,
            shred_version: 0,
        }
    }

    #[cfg(test)]
    pub(crate) fn new_with_pubkey_socketaddr(pubkey: &Pubkey, bind_addr: &SocketAddr) -> Self {
        fn next_port(addr: &SocketAddr, nxt: u16) -> SocketAddr {
            let mut nxt_addr = *addr;
            nxt_addr.set_port(addr.port() + nxt);
            nxt_addr
        }

        let tpu = *bind_addr;
        let gossip = next_port(&bind_addr, 1);
        let tvu = next_port(&bind_addr, 2);
        let tpu_forwards = next_port(&bind_addr, 3);
        let tvu_forwards = next_port(&bind_addr, 4);
        let repair = next_port(&bind_addr, 5);
        let rpc = SocketAddr::new(bind_addr.ip(), rpc_port::DEFAULT_RPC_PORT);
        let rpc_pubsub = SocketAddr::new(bind_addr.ip(), rpc_port::DEFAULT_RPC_PUBSUB_PORT);
        let serve_repair = next_port(&bind_addr, 6);
        Self {
            id: *pubkey,
            gossip,
            tvu,
            tvu_forwards,
            repair,
            tpu,
            tpu_forwards,
            unused: "0.0.0.0:0".parse().unwrap(),
            rpc,
            rpc_pubsub,
            serve_repair,
            wallclock: timestamp(),
            shred_version: 0,
        }
    }

    #[cfg(test)]
    pub(crate) fn new_with_socketaddr(bind_addr: &SocketAddr) -> Self {
        let keypair = Keypair::new();
        Self::new_with_pubkey_socketaddr(&keypair.pubkey(), bind_addr)
    }

    // Construct a ContactInfo that's only usable for gossip
    pub fn new_gossip_entry_point(gossip_addr: &SocketAddr) -> Self {
        Self {
            id: Pubkey::default(),
            gossip: *gossip_addr,
            wallclock: timestamp(),
            ..ContactInfo::default()
        }
    }

    fn is_valid_ip(addr: IpAddr) -> bool {
        !(addr.is_unspecified() || addr.is_multicast())
        // || (addr.is_loopback() && !cfg_test))
        // TODO: boot loopback in production networks
    }

    /// port must not be 0
    /// ip must be specified and not multicast
    /// loopback ip is only allowed in tests
    pub fn is_valid_address(addr: &SocketAddr) -> bool {
        (addr.port() != 0) && Self::is_valid_ip(addr.ip())
    }

    pub fn client_facing_addr(&self) -> (SocketAddr, SocketAddr) {
        (self.rpc, self.tpu)
    }

    pub fn valid_client_facing_addr(&self) -> Option<(SocketAddr, SocketAddr)> {
        if ContactInfo::is_valid_address(&self.rpc) && ContactInfo::is_valid_address(&self.tpu) {
            Some((self.rpc, self.tpu))
        } else {
            None
        }
    }
}

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

    #[test]
    fn test_is_valid_address() {
        let bad_address_port = socketaddr!("127.0.0.1:0");
        assert!(!ContactInfo::is_valid_address(&bad_address_port));
        let bad_address_unspecified = socketaddr!(0, 1234);
        assert!(!ContactInfo::is_valid_address(&bad_address_unspecified));
        let bad_address_multicast = socketaddr!([224, 254, 0, 0], 1234);
        assert!(!ContactInfo::is_valid_address(&bad_address_multicast));
        let loopback = socketaddr!("127.0.0.1:1234");
        assert!(ContactInfo::is_valid_address(&loopback));
        //        assert!(!ContactInfo::is_valid_ip_internal(loopback.ip(), false));
    }

    #[test]
    fn test_default() {
        let ci = ContactInfo::default();
        assert!(ci.gossip.ip().is_unspecified());
        assert!(ci.tvu.ip().is_unspecified());
        assert!(ci.tpu_forwards.ip().is_unspecified());
        assert!(ci.rpc.ip().is_unspecified());
        assert!(ci.rpc_pubsub.ip().is_unspecified());
        assert!(ci.tpu.ip().is_unspecified());
        assert!(ci.unused.ip().is_unspecified());
        assert!(ci.serve_repair.ip().is_unspecified());
    }
    #[test]
    fn test_multicast() {
        let ci = ContactInfo::new_multicast();
        assert!(ci.gossip.ip().is_multicast());
        assert!(ci.tvu.ip().is_multicast());
        assert!(ci.tpu_forwards.ip().is_multicast());
        assert!(ci.rpc.ip().is_multicast());
        assert!(ci.rpc_pubsub.ip().is_multicast());
        assert!(ci.tpu.ip().is_multicast());
        assert!(ci.unused.ip().is_multicast());
        assert!(ci.serve_repair.ip().is_multicast());
    }
    #[test]
    fn test_entry_point() {
        let addr = socketaddr!("127.0.0.1:10");
        let ci = ContactInfo::new_gossip_entry_point(&addr);
        assert_eq!(ci.gossip, addr);
        assert!(ci.tvu.ip().is_unspecified());
        assert!(ci.tpu_forwards.ip().is_unspecified());
        assert!(ci.rpc.ip().is_unspecified());
        assert!(ci.rpc_pubsub.ip().is_unspecified());
        assert!(ci.tpu.ip().is_unspecified());
        assert!(ci.unused.ip().is_unspecified());
        assert!(ci.serve_repair.ip().is_unspecified());
    }
    #[test]
    fn test_socketaddr() {
        let addr = socketaddr!("127.0.0.1:10");
        let ci = ContactInfo::new_with_socketaddr(&addr);
        assert_eq!(ci.tpu, addr);
        assert_eq!(ci.gossip.port(), 11);
        assert_eq!(ci.tvu.port(), 12);
        assert_eq!(ci.tpu_forwards.port(), 13);
        assert_eq!(ci.rpc.port(), rpc_port::DEFAULT_RPC_PORT);
        assert_eq!(ci.rpc_pubsub.port(), rpc_port::DEFAULT_RPC_PUBSUB_PORT);
        assert!(ci.unused.ip().is_unspecified());
        assert_eq!(ci.serve_repair.port(), 16);
    }

    #[test]
    fn replayed_data_new_with_socketaddr_with_pubkey() {
        let keypair = Keypair::new();
        let d1 = ContactInfo::new_with_pubkey_socketaddr(
            &keypair.pubkey(),
            &socketaddr!("127.0.0.1:1234"),
        );
        assert_eq!(d1.id, keypair.pubkey());
        assert_eq!(d1.gossip, socketaddr!("127.0.0.1:1235"));
        assert_eq!(d1.tvu, socketaddr!("127.0.0.1:1236"));
        assert_eq!(d1.tpu_forwards, socketaddr!("127.0.0.1:1237"));
        assert_eq!(d1.tpu, socketaddr!("127.0.0.1:1234"));
        assert_eq!(
            d1.rpc,
            socketaddr!(format!("127.0.0.1:{}", rpc_port::DEFAULT_RPC_PORT))
        );
        assert_eq!(
            d1.rpc_pubsub,
            socketaddr!(format!("127.0.0.1:{}", rpc_port::DEFAULT_RPC_PUBSUB_PORT))
        );
        assert_eq!(d1.tvu_forwards, socketaddr!("127.0.0.1:1238"));
        assert_eq!(d1.repair, socketaddr!("127.0.0.1:1239"));
        assert_eq!(d1.serve_repair, socketaddr!("127.0.0.1:1240"));
    }

    #[test]
    fn test_valid_client_facing() {
        let mut ci = ContactInfo::default();
        assert_eq!(ci.valid_client_facing_addr(), None);
        ci.tpu = socketaddr!("127.0.0.1:123");
        assert_eq!(ci.valid_client_facing_addr(), None);
        ci.rpc = socketaddr!("127.0.0.1:234");
        assert!(ci.valid_client_facing_addr().is_some());
    }

    #[test]
    fn test_sanitize() {
        let mut ci = ContactInfo::default();
        assert_eq!(ci.sanitize(), Ok(()));
        ci.wallclock = MAX_WALLCLOCK;
        assert_eq!(ci.sanitize(), Err(SanitizeError::ValueOutOfBounds));
    }
}