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use futures::{sink::With, Future, Sink, SinkExt as _};

mod fanout_many;
pub use fanout_many::*;

mod router;
pub use router::*;

// @TODO - awaiting selium#22
// mod filter;
// pub use filter::Filter;

// @TODO - awaiting selium#69
// mod ordered;
// pub use ordered::Ordered;

impl<T: ?Sized, Item> SinkExt<Item> for T where T: Sink<Item> {}

pub trait SinkExt<Item>: Sink<Item> {
    // This is a wrapper around `with` for conceptual symmetry with `StreamExt::map`
    fn map<U, Fut, F, E>(self, f: F) -> With<Self, Item, U, Fut, F>
    where
        F: FnMut(U) -> Fut,
        Fut: Future<Output = Result<Item, E>>,
        E: From<Self::Error>,
        Self: Sized,
    {
        self.with(f)
    }

    // @TODO - awaiting selium#22
    // fn filter<Fut, F>(self, f: F) -> Filter<Self, Fut, F, Item>
    // where
    //     F: FnMut(&Item) -> Fut,
    //     Fut: Future<Output = bool>,
    //     Self: Sized,
    // {
    //     Filter::new(self, f)
    // }

    // @TODO - awaiting selium#69
    // fn ordered(self, last_sent: usize) -> Ordered<Self, Item>
    // where
    //     Self: Sized,
    // {
    //     Ordered::new(self, last_sent)
    // }
}