defmodule Mv.Membership.JoinRequestSubmitEmailTest do
  @moduledoc """
  Unit tests for join request confirmation email on submit (Subtask 2).

  Asserts that submit_join_request triggers sending exactly one confirmation email
  (to the request email, with confirm link). Uses Swoosh.Adapters.Test; no integration.
  Sender is wired in implementation; test fails until then (TDD).
  """
  use Mv.DataCase, async: true

  import Swoosh.TestAssertions

  alias Mv.Membership

  @valid_submit_attrs %{
    email: "join#{System.unique_integer([:positive])}@example.com"
  }

  describe "submit_join_request/2 sends confirmation email" do
    test "sends exactly one email to the request email with confirm link" do
      token = "email-test-token-#{System.unique_integer([:positive])}"
      attrs = Map.put(@valid_submit_attrs, :confirmation_token, token)
      email = attrs.email

      assert {:ok, _request} = Membership.submit_join_request(attrs, actor: nil)

      assert_email_sent(fn email_sent ->
        to_addresses = Enum.map(email_sent.to, &elem(&1, 1))

        to_string(email) in to_addresses and
          (email_sent.html_body =~ "/confirm_join/" or email_sent.text_body =~ "/confirm_join/")
      end)
    end
  end
end