Application.put_env(:sample, Example.Endpoint,
  http: [ip: {127, 0, 0, 1}, port: 5001],
  server: true,
  live_view: [signing_salt: "aaaaaaaa"],
  secret_key_base: String.duplicate("a", 64)
)

Mix.install([
  {:plug_cowboy, "~> 2.5"},
  {:jason, "~> 1.0"},
  {:phoenix, "~> 1.7.0"},
  {:phoenix_live_view, "~> 1.0.4"}
])

defmodule Example.ErrorView do
  def render(template, _), do: Phoenix.Controller.status_message_from_template(template)
end

defmodule Example.HomeLive do
  use Phoenix.LiveView, layout: {__MODULE__, :live}
  use Phoenix.VerifiedRoutes, endpoint: Example.Endpoint, router: Example.Router
  alias Phoenix.LiveView.JS

  ### This LV does nothing but render its layout which includes a sticky LiveView

  def mount(_params, _session, socket) do
    {:ok, socket}
  end

  defp phx_vsn, do: Application.spec(:phoenix, :vsn)
  defp lv_vsn, do: Application.spec(:phoenix_live_view, :vsn)

  def render("live.html", assigns) do
    ~H"""
    <script src={"https://cdn.jsdelivr.net/npm/phoenix@#{phx_vsn()}/priv/static/phoenix.min.js"}></script>
    <script src={"https://cdn.jsdelivr.net/npm/phoenix_live_view@#{lv_vsn()}/priv/static/phoenix_live_view.min.js"}></script>
    <script>
      let liveSocket = new window.LiveView.LiveSocket("/live", window.Phoenix.Socket)
      liveSocket.connect()
    </script>

    <h4>A layout containing a (nested) sticky LiveView with a stream.</h4>

    <%= live_render(
      @socket,
      Example.NestedLive,
      id: "sticky",
      sticky: true
    ) %>

    <hr>
    <%= @inner_content %>
    <hr>
    """
  end

  def render(assigns) do
    ~H"""
      <h3>A LiveView that does nothing but render it's layout.</h3>
      <.link navigate={~p"/away"}>Go to a different LV with a (funcky) stream</.link>
    """
  end
end

defmodule Example.AwayLive do
  use Phoenix.LiveView, layout: {Example.HomeLive, :live}
  use Phoenix.VerifiedRoutes, endpoint: Example.Endpoint, router: Example.Router
  alias Phoenix.LiveView.JS

  def mount(_params, _session, socket) do
    socket =
      socket
      |> stream(:messages, [])
      |> stream(:messages, [msg(4)], reset: true) # <--- This is the root cause
    {:ok, socket}
  end

  def render(assigns) do
    ~H"""
    <h3>A liveview with a stream configured twice</h3>
    <h4>This causes the nested liveview in the layout above to be reset by the client.</h4>

    <.link navigate={~p"/"}>Go back to (the now borked) LV without a stream</.link>
    <h1>Normal Stream</h1>
    <div id="msgs-normal" phx-update="stream">
      <div
        :for={{dom_id, msg} <- @streams.messages}
        id={dom_id}
      >
        <div><%= msg.msg %></div>
      </div>
    </div>
    """
  end

  defp msg(num) do
    %{id: num, msg: num}
  end
end

defmodule Example.NestedLive do
  use Phoenix.LiveView #, layout: {__MODULE__, :live}

  def mount(_params, _session, socket) do
    {:ok, stream(socket, :messages, [msg(1), msg(2), msg(3)])}
  end

  def render(assigns) do
    ~H"""
    <div id="msgs-sticky" phx-update="stream">
      <div
        :for={{dom_id, msg} <- @streams.messages}
        id={dom_id}
      >
        <div><%= msg.msg %></div>
      </div>
    </div>
    """
  end

  defp msg(num) do
    %{id: num, msg: num}
  end
end

defmodule Example.Router do
  use Phoenix.Router
  import Phoenix.LiveView.Router

  pipeline :browser do
    plug(:accepts, ["html"])
  end

  scope "/", Example do
    pipe_through(:browser)

    live_session :default do
      live("/", HomeLive, :index)
      live("/away", AwayLive, :index)
    end
  end
end

defmodule Example.Endpoint do
  use Phoenix.Endpoint, otp_app: :sample
  socket("/live", Phoenix.LiveView.Socket)
  plug(Example.Router)
end

{:ok, _} = Supervisor.start_link([Example.Endpoint], strategy: :one_for_one)
Process.sleep(:infinity)