use crate::fmt;
use crate::io::{self, BorrowedCursor, IoSlice, IoSliceMut};
use crate::net::{Ipv4Addr, Ipv6Addr, Shutdown, SocketAddr};
use crate::sync::{Arc, Mutex};
use crate::sys::unsupported;
use crate::time::Duration;

mod tcp;
pub(crate) mod tcp4;

pub struct TcpStream {
    inner: tcp::Tcp,
    read_timeout: Arc<Mutex<Option<Duration>>>,
    write_timeout: Arc<Mutex<Option<Duration>>>,
}

impl TcpStream {
    pub fn connect(addr: io::Result<&SocketAddr>) -> io::Result<TcpStream> {
        let inner = tcp::Tcp::connect(addr?, None)?;
        Ok(Self {
            inner,
            read_timeout: Arc::new(Mutex::new(None)),
            write_timeout: Arc::new(Mutex::new(None)),
        })
    }

    pub fn connect_timeout(addr: &SocketAddr, timeout: Duration) -> io::Result<TcpStream> {
        let inner = tcp::Tcp::connect(addr, Some(timeout))?;
        Ok(Self {
            inner,
            read_timeout: Arc::new(Mutex::new(None)),
            write_timeout: Arc::new(Mutex::new(None)),
        })
    }

    pub fn set_read_timeout(&self, t: Option<Duration>) -> io::Result<()> {
        self.read_timeout.set(t).unwrap();
        Ok(())
    }

    pub fn set_write_timeout(&self, t: Option<Duration>) -> io::Result<()> {
        self.write_timeout.set(t).unwrap();
        Ok(())
    }

    pub fn read_timeout(&self) -> io::Result<Option<Duration>> {
        Ok(self.read_timeout.get_cloned().unwrap())
    }

    pub fn write_timeout(&self) -> io::Result<Option<Duration>> {
        Ok(self.write_timeout.get_cloned().unwrap())
    }

    pub fn peek(&self, _: &mut [u8]) -> io::Result<usize> {
        unsupported()
    }

    pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
        self.inner.read(buf, self.read_timeout()?)
    }

    pub fn read_buf(&self, cursor: BorrowedCursor<'_>) -> io::Result<()> {
        crate::io::default_read_buf(|buf| self.read(buf), cursor)
    }

    pub fn read_vectored(&self, buf: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
        // FIXME: UEFI does support vectored read, so implement that.
        crate::io::default_read_vectored(|b| self.read(b), buf)
    }

    pub fn is_read_vectored(&self) -> bool {
        false
    }

    pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
        self.inner.write(buf, self.write_timeout()?)
    }

    pub fn write_vectored(&self, buf: &[IoSlice<'_>]) -> io::Result<usize> {
        // FIXME: UEFI does support vectored write, so implement that.
        crate::io::default_write_vectored(|b| self.write(b), buf)
    }

    pub fn is_write_vectored(&self) -> bool {
        false
    }

    pub fn peer_addr(&self) -> io::Result<SocketAddr> {
        self.inner.peer_addr()
    }

    pub fn socket_addr(&self) -> io::Result<SocketAddr> {
        self.inner.socket_addr()
    }

    pub fn shutdown(&self, _: Shutdown) -> io::Result<()> {
        unsupported()
    }

    pub fn duplicate(&self) -> io::Result<TcpStream> {
        unsupported()
    }

    pub fn set_linger(&self, _: Option<Duration>) -> io::Result<()> {
        unsupported()
    }

    pub fn linger(&self) -> io::Result<Option<Duration>> {
        unsupported()
    }

    pub fn set_nodelay(&self, _: bool) -> io::Result<()> {
        unsupported()
    }

    pub fn nodelay(&self) -> io::Result<bool> {
        self.inner.nodelay()
    }

    pub fn set_ttl(&self, _: u32) -> io::Result<()> {
        unsupported()
    }

    pub fn ttl(&self) -> io::Result<u32> {
        self.inner.ttl()
    }

    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
        unsupported()
    }

    pub fn set_nonblocking(&self, _: bool) -> io::Result<()> {
        unsupported()
    }
}

impl fmt::Debug for TcpStream {
    fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
        todo!()
    }
}

pub struct TcpListener {
    inner: tcp::Tcp,
}

impl TcpListener {
    pub fn bind(_: io::Result<&SocketAddr>) -> io::Result<TcpListener> {
        unsupported()
    }

    pub fn socket_addr(&self) -> io::Result<SocketAddr> {
        unsupported()
    }

    pub fn accept(&self) -> io::Result<(TcpStream, SocketAddr)> {
        unsupported()
    }

    pub fn duplicate(&self) -> io::Result<TcpListener> {
        unsupported()
    }

    pub fn set_ttl(&self, _: u32) -> io::Result<()> {
        unsupported()
    }

    pub fn ttl(&self) -> io::Result<u32> {
        self.inner.ttl()
    }

    pub fn set_only_v6(&self, _: bool) -> io::Result<()> {
        unsupported()
    }

    pub fn only_v6(&self) -> io::Result<bool> {
        unsupported()
    }

    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
        unsupported()
    }

    pub fn set_nonblocking(&self, _: bool) -> io::Result<()> {
        unsupported()
    }
}

impl fmt::Debug for TcpListener {
    fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
        todo!()
    }
}

pub struct UdpSocket(!);

impl UdpSocket {
    pub fn bind(_: io::Result<&SocketAddr>) -> io::Result<UdpSocket> {
        unsupported()
    }

    pub fn peer_addr(&self) -> io::Result<SocketAddr> {
        self.0
    }

    pub fn socket_addr(&self) -> io::Result<SocketAddr> {
        self.0
    }

    pub fn recv_from(&self, _: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
        self.0
    }

    pub fn peek_from(&self, _: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
        self.0
    }

    pub fn send_to(&self, _: &[u8], _: &SocketAddr) -> io::Result<usize> {
        self.0
    }

    pub fn duplicate(&self) -> io::Result<UdpSocket> {
        self.0
    }

    pub fn set_read_timeout(&self, _: Option<Duration>) -> io::Result<()> {
        self.0
    }

    pub fn set_write_timeout(&self, _: Option<Duration>) -> io::Result<()> {
        self.0
    }

    pub fn read_timeout(&self) -> io::Result<Option<Duration>> {
        self.0
    }

    pub fn write_timeout(&self) -> io::Result<Option<Duration>> {
        self.0
    }

    pub fn set_broadcast(&self, _: bool) -> io::Result<()> {
        self.0
    }

    pub fn broadcast(&self) -> io::Result<bool> {
        self.0
    }

    pub fn set_multicast_loop_v4(&self, _: bool) -> io::Result<()> {
        self.0
    }

    pub fn multicast_loop_v4(&self) -> io::Result<bool> {
        self.0
    }

    pub fn set_multicast_ttl_v4(&self, _: u32) -> io::Result<()> {
        self.0
    }

    pub fn multicast_ttl_v4(&self) -> io::Result<u32> {
        self.0
    }

    pub fn set_multicast_loop_v6(&self, _: bool) -> io::Result<()> {
        self.0
    }

    pub fn multicast_loop_v6(&self) -> io::Result<bool> {
        self.0
    }

    pub fn join_multicast_v4(&self, _: &Ipv4Addr, _: &Ipv4Addr) -> io::Result<()> {
        self.0
    }

    pub fn join_multicast_v6(&self, _: &Ipv6Addr, _: u32) -> io::Result<()> {
        self.0
    }

    pub fn leave_multicast_v4(&self, _: &Ipv4Addr, _: &Ipv4Addr) -> io::Result<()> {
        self.0
    }

    pub fn leave_multicast_v6(&self, _: &Ipv6Addr, _: u32) -> io::Result<()> {
        self.0
    }

    pub fn set_ttl(&self, _: u32) -> io::Result<()> {
        self.0
    }

    pub fn ttl(&self) -> io::Result<u32> {
        self.0
    }

    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
        self.0
    }

    pub fn set_nonblocking(&self, _: bool) -> io::Result<()> {
        self.0
    }

    pub fn recv(&self, _: &mut [u8]) -> io::Result<usize> {
        self.0
    }

    pub fn peek(&self, _: &mut [u8]) -> io::Result<usize> {
        self.0
    }

    pub fn send(&self, _: &[u8]) -> io::Result<usize> {
        self.0
    }

    pub fn connect(&self, _: io::Result<&SocketAddr>) -> io::Result<()> {
        self.0
    }
}

impl fmt::Debug for UdpSocket {
    fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
        self.0
    }
}

pub struct LookupHost(!);

impl LookupHost {
    pub fn port(&self) -> u16 {
        self.0
    }
}

impl Iterator for LookupHost {
    type Item = SocketAddr;
    fn next(&mut self) -> Option<SocketAddr> {
        self.0
    }
}

impl TryFrom<&str> for LookupHost {
    type Error = io::Error;

    fn try_from(_v: &str) -> io::Result<LookupHost> {
        unsupported()
    }
}

impl<'a> TryFrom<(&'a str, u16)> for LookupHost {
    type Error = io::Error;

    fn try_from(_v: (&'a str, u16)) -> io::Result<LookupHost> {
        unsupported()
    }
}