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use crate::Identifier;

/// Describes a node in a Paxakos cluster.
///
/// Beyond an identifier, a `NodeInfo` implementation provides all the
/// information necessary to communicate with that node, typically a hostname
/// and a (TCP) port.
pub trait NodeInfo: 'static + Clone + std::fmt::Debug + Send + Sync {
    /// Identifier of this node.
    type Id: Identifier;

    /// A unique identifier for this node.
    fn id(&self) -> Self::Id;

    // TODO
    // type Weight: num_traits::One = u32;
    // fn weight(&self) -> Self::Weight {
    //     num_traits::One::one()
    // }

    // TODO
    // type Priority: Default = i32;
    // fn priority(&self) -> Self::Priority {
    //     Default::default()
    // }
}

/// To toy around with a single node cluster.
#[cfg(feature = "prototyping")]
impl NodeInfo for () {
    type Id = ();

    fn id(&self) -> Self::Id {}
}