defmodule Horde.DistributionStrategy do
  @type t :: module()

  @moduledoc """
  Define your own distribution strategy by implementing this behaviour and configuring Horde to use it.

  A few distribution stategies are included in Horde, namely:

  - `Horde.UniformDistribution`
  - `Horde.UniformQuorumDistribution`
  - `Horde.UniformRandomDistribution`
  """
  @type member :: Horde.DynamicSupervisor.Member.t()
  @callback choose_node(
              spec :: Supervisor.child_spec(),
              members :: [member()]
            ) ::
              {:ok, member()} | {:error, reason :: String.t()}
  @callback has_quorum?(members :: [member()]) :: boolean()
end