defmodule FirehoseWeb.MicroprintsCase do
  @moduledoc """
  Helpers for driving the `/microprints` LiveView.

  Both `FirehoseWeb.MicroprintsLiveTest` and `FirehoseWeb.SourceViewerTest` walk
  the same page through the same two controls (the per-card Expand/Collapse
  button and the microprint rects), so the mechanics live here instead of being
  re-implemented in each test module.

  A plain module, imported by the tests, rather than a `use`-able case template:
  the LiveView tests own their own setup and only share these three actions.
  """

  import Phoenix.LiveViewTest

  @doc """
  Clicks the Expand control of the card for `path` and returns the render.
  """
  def expand_file(view, path) do
    view
    |> element(~s(button[phx-value-path="#{path}"]), "Expand")
    |> render_click()
  end

  @doc """
  Clicks the Collapse control of the card for `path` and returns the render.
  """
  def collapse_file(view, path) do
    view
    |> element(~s(button[phx-value-path="#{path}"]), "Collapse")
    |> render_click()
  end

  @doc """
  Clicks a single line of a microprint, highlighting it in the source viewer.

  The microprint renders several rect segments per line, so `element/3` cannot
  pick one; the `highlight_line` event is dispatched directly instead.
  """
  def click_microprint_rect(view, path, line) do
    render_click(view, "highlight_line", %{"line" => Integer.to_string(line), "path" => path})
  end
end