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use futures::FutureExt;

use crate::error::Error;

pub mod blocking;
pub mod r#async;


pub enum Interface {
	Usb(crate::usb::Interface),
	Serial(crate::serial::Interface),
}

impl From<crate::usb::Interface> for Interface {
	fn from(interface: crate::usb::Interface) -> Self { Self::Usb(interface) }
}

impl From<crate::serial::Interface> for Interface {
	fn from(interface: crate::serial::Interface) -> Self { Self::Serial(interface) }
}


impl std::fmt::Display for Interface {
	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
		match self {
			Interface::Usb(interface) => interface.fmt(f),
			Interface::Serial(interface) => interface.fmt(f),
		}
	}
}


impl std::fmt::Debug for Interface {
	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
		match self {
			Self::Usb(_) => f.debug_tuple("Usb").finish(),
			Self::Serial(i) => f.debug_tuple("Serial").field(i.info()).finish(),
		}
	}
}


impl r#async::Out for Interface
	where crate::usb::Interface: r#async::Out,
	      crate::serial::Interface: r#async::Out
{
	#[inline(always)]
	fn send(&self, data: &[u8]) -> impl futures::Future<Output = Result<usize, Error>> {
		match self {
			Self::Usb(i) => i.send(data).left_future(),
			Self::Serial(i) => i.send(data).right_future(),
		}
	}

	#[inline(always)]
	async fn send_cmd(&self, cmd: crate::device::command::Command) -> Result<usize, Error> {
		match self {
			Interface::Usb(i) => r#async::Out::send_cmd(i, cmd).await,
			Interface::Serial(i) => r#async::Out::send_cmd(i, cmd).await,
		}
	}
}

impl r#async::In for Interface
	where crate::usb::Interface: r#async::In,
	      crate::serial::Interface: r#async::In
{
}


impl blocking::Out for Interface {
	#[inline(always)]
	fn send_cmd(&self, cmd: crate::device::command::Command) -> Result<usize, Error> {
		match self {
			Interface::Usb(i) => blocking::Out::send_cmd(i, cmd),
			Interface::Serial(i) => blocking::Out::send_cmd(i, cmd),
		}
	}
}

impl blocking::In for Interface {}