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//! TCP Transport utilities for Ockam's routing framework
//!
//! The `ockam_node` crate sits at the core
//! of the Ockam routing framework, with transport specific
//! abstraction plugins.  This crate implements a TCP connection
//! plugin for this architecture.
//!
//! You can use Ockam's routing mechanism for cryptographic protocols,
//! key lifecycle, credential exchange, enrollment, etc, without having
//! to worry about the transport specifics.
#![deny(unsafe_code)]
#![warn(
    missing_docs,
    dead_code,
    trivial_casts,
    trivial_numeric_casts,
    unused_import_braces,
    unused_qualifications
)]
#![cfg_attr(not(feature = "std"), no_std)]

#[cfg(feature = "std")]
extern crate core;

#[cfg(feature = "alloc")]
extern crate alloc;

mod portal;
mod router;
mod workers;

pub(crate) use portal::*;
pub(crate) use router::*;
pub(crate) use workers::*;

mod transport;

pub use transport::*;

use ockam_core::compat::net::SocketAddr;
use ockam_core::{Result, TransportType};
use ockam_transport_core::TransportError;

/// TCP address type constant
pub const TCP: TransportType = TransportType::new(1);

pub(crate) const CLUSTER_NAME: &str = "_internals.transport.tcp";

fn parse_socket_addr<S: AsRef<str>>(s: S) -> Result<SocketAddr> {
    Ok(s.as_ref()
        .parse()
        .map_err(|_| TransportError::InvalidAddress)?)
}

#[cfg(test)]
mod test {
    use core::fmt::Debug;
    use ockam_core::{Error, Result};

    use crate::parse_socket_addr;
    use crate::TransportError;

    fn assert_transport_error<T>(result: Result<T>, error: TransportError)
    where
        T: Debug,
    {
        let invalid_address_error: Error = error.into();
        assert_eq!(result.unwrap_err().code(), invalid_address_error.code())
    }

    #[test]
    fn test_parse_socket_address() {
        let result = parse_socket_addr("hostname:port");
        assert!(result.is_err());
        assert_transport_error(result, TransportError::InvalidAddress);

        let result = parse_socket_addr("example.com");
        assert!(result.is_err());
        assert_transport_error(result, TransportError::InvalidAddress);

        let result = parse_socket_addr("example.com:80");
        assert!(result.is_err());
        assert_transport_error(result, TransportError::InvalidAddress);

        let result = parse_socket_addr("127.0.0.1");
        assert!(result.is_err());
        assert_transport_error(result, TransportError::InvalidAddress);

        let result = parse_socket_addr("127.0.0.1:port");
        assert!(result.is_err());
        assert_transport_error(result, TransportError::InvalidAddress);

        let result = parse_socket_addr("127.0.1:80");
        assert!(result.is_err());
        assert_transport_error(result, TransportError::InvalidAddress);

        let result = parse_socket_addr("127.0.0.1:65536");
        assert!(result.is_err());
        assert_transport_error(result, TransportError::InvalidAddress);

        let result = parse_socket_addr("127.0.0.1:0");
        assert!(result.is_ok());

        let result = parse_socket_addr("127.0.0.1:80");
        assert!(result.is_ok());

        let result = parse_socket_addr("127.0.0.1:8080");
        assert!(result.is_ok());
    }
}