defmodule ScalesCmsWeb.Components.LocaleSwitcher do
  @moduledoc """
  A locale switcher component, that provides a PubSub feature throughout the whole
  application so they can tag along with locale changes
  """
  use ScalesCmsWeb, :live_component

  alias ScalesCms.Cms.Helpers.Locales

  @impl Phoenix.LiveComponent
  def mount(socket) do
    {:ok, assign(socket, locale: Locales.default_locale())}
  end

  attr :class, :string, default: nil

  @impl Phoenix.LiveComponent
  def render(assigns) do
    ~H"""
    <div>
      <div
        :if={Enum.count(Locales.all()) > 1}
        id="locale-switcher"
        phx-hook="LocalLocaleStorage"
        phx-target={@myself}
        class={@class}
      >
        <form>
          <select
            name="locale"
            id="locale"
            phx-change="switch-locale"
            phx-target={@myself}
            class="border-[1px] rounded py-[12px] px-[16px] text-sm"
          >
            <%= for %{code: code, name: name} <- Locales.all() do %>
              <option value={code} selected={code == @locale}>{name}</option>
            <% end %>
          </select>
        </form>
      </div>
    </div>
    """
  end

  @impl Phoenix.LiveComponent
  def handle_event("got-locale", %{"locale" => locale}, socket) do
    notify_parent({:locale_switched, locale})

    {:noreply,
     socket
     |> assign(locale: locale)}
  end

  def handle_event("switch-locale", %{"locale" => locale}, socket) do
    notify_parent({:locale_switched, locale})

    socket
    |> push_event("set-locale", %{locale: locale})
    |> assign(locale: locale)
    |> then(&{:noreply, &1})
  end

  defp notify_parent(msg), do: send(self(), {__MODULE__, msg})
end