use std::fmt::Debug;

use crate::context::Context;

/// A trait for types that can handle reception of a message.
///
/// Message types are mapped to handler types by Dispatcher.
/// This trait is intended to allow composing handler logic.
pub trait MessageHandler: Debug {
  type Message;

  /// Attempts to handle the given message against the given context.
  fn run(
    self,
    context: &mut Context,
    message: &Self::Message,
  ) -> anyhow::Result<()>;

  /// Returns the name of this handler type.
  fn name() -> String;
}