bex

defmodule <%= inspect(@behaviour_module) %> do
  @moduledoc false

  _ = """
  Behaviour wrapping <%= inspect(@module) %>
  """

  <%= for {fun, _arity, args} <- @funs do %>
    @doc false
    @callback <%= fun %>(<%= args |> Enum.map(&"#{&1} :: any()") |> Enum.join(", ") %>) :: any()
  <% end %>

  # default implementation
  @actual_impls Application.compile_env(:bex, :impls, %{})
  @actual_impl Map.get(@actual_impls, <%= inspect(@module) %>, <%= inspect(@behaviour_impl_module)%>)

  <%= for {fun, _arity, args} <- @funs do %>
    @doc false
    defdelegate <%= fun %>(<%= Enum.join(args, ", ") %>), to: @actual_impl

    @doc false
    def <%= fun %>(<%= Enum.join(args, ", ") %>, %Macro.Env{} = env) do
      event_prefix = Bex.telemetry_event_base(env)

      :telemetry.execute(
        event_prefix ++ [:start],
        Bex.telemetry_measurements_base(%{}),
        %{
          <%= args |> Enum.map(&"#{&1}: #{&1}") |> Enum.join(",\n") %>
        }
      )

      result = <%= fun %>(<%= Enum.join(args, ", ") %>)

      :telemetry.execute(
        event_prefix ++ [:stop],
        Bex.telemetry_measurements_base(%{}),
        %{result: result}
      )

      result
    end
  <% end %>
end

defmodule <%= inspect(@behaviour_impl_module) %> do
  @moduledoc false

  _ = """
  Default implementation for the behaviour wrapping <%= inspect(@module) %>
  """

  @behaviour <%= inspect(@behaviour_module) %>

  <%= for {fun, _arity, args} <- @funs do %>
    @impl <%= inspect(@behaviour_module) %>
    def <%= fun %>(<%= Enum.join(args, ", ") %>) do
      <%= inspect(@module) %>.<%= fun %>(<%= Enum.join(args, ", ") %>)
    end
  <% end %>
end

case {Code.ensure_compiled(Mox), Mix.env()} do
  {{:module, Mox}, :test} ->
    <%= inspect(@behaviour_module) %>
    |> Module.concat(Mox)
    |> Mox.defmock(for: <%= inspect(@behaviour_module) %>)

  {_, :test} ->
    IO.warn("Please add `mox` to deps in `test` env")

  _ ->
    :ok
end