use std::{io, os::fd::{AsRawFd, OwnedFd}};

#[cfg(target_os = "yggdrasil")]
pub mod yggdrasil;
#[cfg(target_os = "yggdrasil")]
pub use yggdrasil::*;

#[cfg(any(unix, rust_analyzer))]
pub mod unix;
#[cfg(unix)]
pub use unix::*;

pub enum Either<T, U> {
    Left(T),
    Right(U)
}

pub trait IpcSender: AsRawFd {
    fn send_message_to(&self, message: &[u8], peer: &PeerAddr) -> Result<(), io::Error>;
    fn send_file_to<F: AsRawFd>(&self, file: &F, peer: &PeerAddr) -> Result<(), io::Error>;

    fn host_addr(&self) -> &PeerAddr;
}

pub trait IpcReceiver: AsRawFd {
    fn receive(&self, buffer: &mut [u8]) -> Result<(PeerAddr, Either<usize, OwnedFd>), io::Error>;
}

impl<T, U> Either<T, U> {
    pub fn try_map_left<E, R, F: FnOnce(T) -> Result<R, E>>(self, map: F) -> Result<Either<R, U>, E> {
        match self {
            Self::Left(val) => map(val).map(Either::Left),
            Self::Right(val) => Ok(Either::Right(val))
        }
    }
}