labelmaker/test/labelmaker_web/controllers/label_controller_test.exs

defmodule LabelmakerWeb.LabelControllerTest do
  use LabelmakerWeb.ConnCase, async: false

  @label_dir Path.join(:code.priv_dir(:labelmaker), "static/labels")

  setup do
    # Clean up test images before each test
    File.rm_rf!(@label_dir)
    File.mkdir_p!(@label_dir)
    :ok
  end

  describe "show/2" do
    test "generates and returns PNG image for valid label", %{conn: conn} do
      conn = get(conn, ~p"/TestLabel")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
      assert byte_size(conn.resp_body) > 0
    end

    test "generates image with custom color", %{conn: conn} do
      conn = get(conn, ~p"/ColorTest?color=red")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "generates image with custom font", %{conn: conn} do
      conn = get(conn, ~p"/FontTest?font=Impact")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "generates image with font shortcut", %{conn: conn} do
      conn = get(conn, ~p"/ShortcutTest?font=h")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "generates image with custom size", %{conn: conn} do
      conn = get(conn, ~p"/SizeTest?size=96")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "generates image with outline", %{conn: conn} do
      conn = get(conn, ~p"/OutlineTest?outline=blue")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "generates image without outline", %{conn: conn} do
      conn = get(conn, ~p"/NoOutline?outline=none")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "generates image with width and height", %{conn: conn} do
      conn = get(conn, ~p"/FixedSize?width=400&height=300")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "generates image with alignment", %{conn: conn} do
      conn = get(conn, ~p"/AlignTest?width=400&height=300&align=left")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "handles multiline labels with newlines", %{conn: conn} do
      conn = get(conn, ~p"/Line1\nLine2\nLine3")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "handles URL-encoded labels", %{conn: conn} do
      conn = get(conn, ~p"/Hello%20World")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "caches generated images", %{conn: conn} do
      # First request generates the image
      conn1 = get(conn, ~p"/CacheTest?color=blue")
      assert conn1.status == 200

      # Get the generated filename
      files_before = File.ls!(@label_dir)
      assert length(files_before) > 0

      # Second request should use cached image
      conn2 = get(conn, ~p"/CacheTest?color=blue")
      assert conn2.status == 200

      # Should still have same number of files (no duplicate generation)
      files_after = File.ls!(@label_dir)
      assert files_before == files_after
    end

    test "generates different files for different parameters", %{conn: conn} do
      _conn1 = get(conn, ~p"/Test?color=red")
      _conn2 = get(conn, ~p"/Test?color=blue")

      files = File.ls!(@label_dir)
      assert length(files) == 2
    end

    test "handles special characters in label", %{conn: conn} do
      conn = get(conn, ~p"/Test!@#$%")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "handles emoji in label", %{conn: conn} do
      conn = get(conn, ~p"/Hello🎉")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "ignores invalid color parameter and uses default", %{conn: conn} do
      conn = get(conn, ~p"/Test?color=invalidcolor")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "ignores invalid font parameter and uses default", %{conn: conn} do
      conn = get(conn, ~p"/Test?font=invalidfont")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "ignores invalid size parameter and uses default", %{conn: conn} do
      conn = get(conn, ~p"/Test?size=999")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "handles combination of all valid parameters", %{conn: conn} do
      conn = get(conn, ~p"/FullTest?color=yellow&font=Impact&outline=black&size=96")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end

    test "handles empty label", %{conn: conn} do
      conn = get(conn, ~p"/ ")

      assert conn.status == 200
      assert get_resp_header(conn, "content-type") == ["image/png; charset=utf-8"]
    end
  end
end