firehose/app/test/firehose_web/live/microprints_live_test.exs

alias FirehoseWeb.MicroprintsLive

defmodule FirehoseWeb.MicroprintsLiveTest do
  use FirehoseWeb.ConnCase, async: true

  import Phoenix.LiveViewTest

  describe "scan_source_files/0" do
    test "returns exactly 2 files" do
      files = FirehoseWeb.MicroprintsLive.scan_source_files()

      assert length(files) == 2
    end

    test "returns only .ex files from app/ and blogex/ directories" do
      files = FirehoseWeb.MicroprintsLive.scan_source_files()

      # With the 2-file limit, check that returned files are valid .ex paths
      Enum.each(files, fn file ->
        assert String.ends_with?(file, ".ex")
        assert String.starts_with?(file, "lib/") or String.starts_with?(file, "../blogex/")
      end)
    end

    test "does not include files from _build/ directory" do
      files = FirehoseWeb.MicroprintsLive.scan_source_files()

      refute Enum.any?(files, &String.starts_with?(&1, "_build/"))
    end

    test "does not include files from deps/ directory" do
      files = FirehoseWeb.MicroprintsLive.scan_source_files()

      refute Enum.any?(files, &String.starts_with?(&1, "deps/"))
    end

    test "does not include files from examples/ directory" do
      files = FirehoseWeb.MicroprintsLive.scan_source_files()

      refute Enum.any?(files, &String.contains?(&1, "/examples/"))
    end

    test "does not include test files" do
      files = FirehoseWeb.MicroprintsLive.scan_source_files()

      refute Enum.any?(files, &String.contains?(&1, "/test/"))
    end

    test "paths are relative (no leading slash or absolute path)" do
      files = FirehoseWeb.MicroprintsLive.scan_source_files()

      refute Enum.any?(files, &String.starts_with?(&1, "/"))
    end

    test "app paths do not contain source dir prefix" do
      files = FirehoseWeb.MicroprintsLive.scan_source_files()

      app_files = Enum.filter(files, &String.starts_with?(&1, "lib/"))
      refute Enum.any?(app_files, &String.starts_with?(&1, "app/"))
    end

    test "blogex paths start with ../blogex/" do
      files = FirehoseWeb.MicroprintsLive.scan_source_files()

      blogex_files = Enum.filter(files, &String.starts_with?(&1, "../blogex/"))
      # With the 2-file limit, blogex files may or may not be included
      # depending on which files are most recently modified
      assert is_list(blogex_files)
    end
  end

  describe "expanded_path and highlighted_path coupling" do
    test "expanding file A and highlighting a line in file B should collapse file A", %{conn: conn} do
      files = MicroprintsLive.scan_source_files()
      assert length(files) >= 2, "Need at least 2 files to test coupling"

      [file_a, file_b | _] = files

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

      # Expand file A
      view
      |> element("button[phx-value-path=\"#{file_a}\"]", "Expand")
      |> render_click()

      # Verify file A shows "Collapse" button (it's expanded)
      html = render(view)
      assert html =~ ~s(phx-value-path="#{file_a}")
      assert html =~ "Collapse"

      # Highlight a line in file B (rect elements inside SVG)
      view
      |> element("svg rect[phx-value-line=\"1\"][phx-value-path=\"#{file_b}\"]")
      |> render_click()

      # file A should be collapsed when highlighting a different file
      html = render(view)
      refute html =~ "Collapse",
             "file A should be collapsed after highlighting a different file, but the Collapse button is still visible (expanded_path is uncoupled from highlighted_path)"
    end

    test "switching expand from file A to file B shows file B's source content, not file A's", %{conn: conn} do
      files = MicroprintsLive.scan_source_files()
      assert length(files) >= 2, "Need at least 2 files to test source switching"

      [file_a, file_b | _] = files

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

      # Expand file A
      view
      |> element("button[phx-value-path=\"#{file_a}\"]", "Expand")
      |> render_click()

      # Verify file A's source is shown (check for module def from microprints_live.ex)
      html = render(view)
      assert html =~ "FirehoseWeb.MicroprintsLive",
             "When file A is expanded, its source should be visible"

      # Expand file B (should auto-collapse A)
      view
      |> element("button[phx-value-path=\"#{file_b}\"]", "Expand")
      |> render_click()

      # Verify file B's source is shown, NOT file A's
      html = render(view)
      assert html =~ "Firehose.Application",
             "When file B is expanded, its source should be visible (not file A's source)"

      # File A's button should now say "Expand" (collapsed)
      refute html =~ ~s(phx-value-path="#{file_a}".*Collapse),
             "file A should be collapsed after switching expand to file B"
    end
  end
end