defmodule MvWeb.MemberLive.IndexDensityTest do
  @moduledoc """
  §1.4 — The density toggle switches the table row-spacing token and reflects the
  active density in the control state.
  §1.5 — Density persists across reload per browser (session/cookie), with the
  global default applying when nothing is stored.
  """
  use MvWeb.ConnCase, async: false

  import Phoenix.LiveViewTest

  alias Mv.Helpers.SystemActor

  setup %{conn: conn} do
    {:ok, _} =
      Mv.Membership.create_member(
        %{first_name: "Dense", last_name: "Row", email: "dense@example.com"},
        actor: SystemActor.get_system_actor()
      )

    %{conn: conn_with_oidc_user(conn)}
  end

  defp open_view_settings(view) do
    view |> element("[data-testid='view-settings-button']") |> render_click()
    view
  end

  test "defaults to comfortable when nothing is stored", %{conn: conn} do
    {:ok, view, _html} = live(conn, ~p"/members")

    assert has_element?(view, "[data-testid='members-table-scroll'][data-density='comfortable']")
    # The compact-mode toggle reflects the active (comfortable, i.e. not compact) state.
    open_view_settings(view)
    assert has_element?(view, "[data-testid='view-setting-density'][aria-checked='false']")
  end

  test "toggle switches the density token and the control state", %{conn: conn} do
    {:ok, view, _html} = live(conn, ~p"/members")

    open_view_settings(view)
    view |> element("[data-testid='view-setting-density']") |> render_click()

    assert has_element?(view, "[data-testid='members-table-scroll'][data-density='compact']")
    assert has_element?(view, "[data-testid='view-setting-density'][aria-checked='true']")

    # Toggling again returns to comfortable.
    view |> element("[data-testid='view-setting-density']") |> render_click()
    assert has_element?(view, "[data-testid='members-table-scroll'][data-density='comfortable']")
  end

  test "restores a persisted density from the session on reload", %{conn: conn} do
    conn =
      Plug.Test.init_test_session(conn, %{
        "member_view_settings" => ~s({"density":"comfortable"})
      })

    {:ok, view, _html} = live(conn, ~p"/members")

    assert has_element?(view, "[data-testid='members-table-scroll'][data-density='comfortable']")
  end

  test "restores a persisted density on the connected mount via connect params", %{conn: conn} do
    # Faithful reload round-trip: the connected mount cannot read the cookie
    # (the live socket's connect-info map has no cookies), so the client echoes
    # the persisted value through connect params. This is the path that was
    # broken in the R1 accept (cookie written but not restored on mount).
    conn = put_connect_params(conn, %{"view_settings" => ~s({"density":"comfortable"})})
    {:ok, view, _html} = live(conn, ~p"/members")

    assert has_element?(view, "[data-testid='members-table-scroll'][data-density='comfortable']")
  end
end