defmodule FreediveWeb.ServiceLive do
  use FreediveWeb.LiliformLive
  alias Freedive.Api.Service
  require Logger

  def render(assigns) do
    ~H"""
    <.page name="Services" filters={@filters} details={@details}>
      <FreediveWeb.ServiceLive.Components.items_block
        items={@items}
        selected_item={@selected_item}
        details={@details}
      />
    </.page>
    """
  end

  def on_mount_connected(socket) do
    Logger.warning("Mounting ServiceLive")
    Service.subscribe()
    {:ok, socket}
  end

  def items() do
    Service.list()
  end

  def filters() do
    [
      %{
        title: "Running",
        key: :running,
        icon: "circle-play",
        active: true
      },
      %{
        title: "Enabled",
        key: :enabled,
        icon: "circle-check",
        active: false
      }
    ]
  end

  def search(items, query) do
    items
    |> Enum.filter(fn {name, _item} ->
      String.contains?(String.downcase(name), String.downcase(query))
    end)
    |> Enum.into(%{}, fn {name, item} -> {name, item} end)
  end

  def handle_event("action:" <> action, %{"name" => service_name}, socket)
      when action in ["start", "stop", "restart"] do
    case action do
      "start" -> Service.start(service_name)
      "stop" -> Service.stop(service_name)
      "restart" -> Service.restart(service_name)
    end

    {:noreply, socket}
  end

  def handle_event("command:" <> command, %{"name" => service_name}, socket) do
    Service.command(service_name, command)
    {:noreply, socket}
  end

  def handle_info({event, payload}, socket) do
    case event do
      :command ->
        # Logger.info("ServiceLive: Command: #{inspect(payload)}")

        socket =
          if socket.assigns.selected_item && payload.name == socket.assigns.selected_item.name do
            socket |> assign(:selected_item, %{socket.assigns.selected_item | busy: true})
          else
            socket
          end

        {:noreply, socket}

      :refreshed ->
        # Logger.info("ServiceLive: Refreshed: #{inspect(payload)}")

        socket =
          if socket.assigns.selected_item && payload.name == socket.assigns.selected_item.name do
            socket
            |> assign(:selected_item, %{
              socket.assigns.selected_item
              | running: payload.running,
                enabled: payload.enabled,
                busy: false
            })
            |> assign(:items, socket.assigns.items |> Map.put(payload.name, payload))
          else
            socket
          end

        {:noreply, socket}

      :stdlog ->
        # Logger.info("ServiceLive: Stdlog: #{inspect(payload)}")

        socket =
          if socket.assigns.selected_item && payload.name == socket.assigns.selected_item.name do
            socket
            |> assign(:selected_item, %{
              socket.assigns.selected_item
              | log: socket.assigns.selected_item.log ++ payload.log,
                busy: false
            })
          else
            socket
          end

        {:noreply, socket}

      _ ->
        Logger.warning("ServiceLive: Unknown event: #{event}, payload: #{inspect(payload)}")
        {:noreply, socket}
    end
  end
end

defmodule FreediveWeb.ServiceLive.Components do
  use Liliform.Component
  import Liliform.Icon
  import Liliform.Panel
  import Liliform.Title

  @doc """
  Returns items as panel-blocks.
  """
  attr :items, :list, default: [], doc: "items"
  attr :selected_item, :string, default: nil, doc: "selected item"
  attr :details, :string, default: nil, doc: "details"

  def items_block(%{details: true} = assigns) do
    ~H"""
    <.link
      class="panel-block pt-1 has-background-light"
      phx-click="tap"
      phx-value-name={@selected_item.name}
    >
      <span class="panel-icon">
        <.icon for="arrow-left" aria-hidden="true" has-text-dark />
      </span>
      <div class="mt-2 ml-2">Back</div>
    </.link>

    <.panel_block>
      <%!-- <.icon_raw for={@selected_item.icon} color="auto" size="3rem" class="" aria-hidden="true" /> --%>
      <.icon_raw for={@selected_item.icon} color="auto" size="3rem" aria-hidden="true" />
      <div class="column">
        <.title is-4>
          <%= @selected_item.name %>
          <%= if @selected_item.running do %>
            <.icon for="circle-play" color="lightgreen" aria-hidden="true" />
          <% else %>
            <.icon for="circle-stop" color="gray" aria-hidden="true" />
          <% end %>
          <%= if @selected_item.enabled do %>
            <.icon for="circle-check" color="lightgreen" aria-hidden="true" />
          <% else %>
            <.icon for="circle-x" color="gray" aria-hidden="true" />
          <% end %>
        </.title>
        <.subtitle>
          <%= @selected_item.description %>
        </.subtitle>
      </div>
    </.panel_block>

    <%= if Map.has_key?(@selected_item, :log) and @selected_item.log != [] do %>
      <.panel_block>
        <pre><code><%= Enum.join(@selected_item.log, "\n") %></code></pre>
      </.panel_block>
    <% end %>

    <.panel_block_div>
      <%= if @selected_item.running do %>
        <.icon_raw for="power" color="lightgreen" size="2rem" class="ml-2 mr-5" aria-hidden="true" />
      <% else %>
        <.icon_raw for="power" color="gray" size="2rem" class="ml-2 mr-5" aria-hidden="true" />
      <% end %>
      <div class="columns is-fullwidth mr-4">
        <%= if @selected_item.running do %>
            <button
              class="button is-warning column is-2 m-2 is-fullwidth"
              phx-click="action:restart"
              phx-value-name={@selected_item.name}
              {if @selected_item.busy, do: [disabled: true], else: []}
            >
              Restart
            </button>
            <button
              class="button is-danger column is-2 m-2 is-fullwidth"
              phx-click="action:stop"
              phx-value-name={@selected_item.name}
              {if @selected_item.busy, do: [disabled: true], else: []}
            >
              Stop
            </button>
        <% else %>
            <button
              class="button is-success column is-2 m-2 is-fullwidth"
              phx-click="action:start"
              phx-value-name={@selected_item.name}
              {if @selected_item.busy, do: [disabled: true], else: []}
            >
              Start
            </button>
        <% end %>
      </div>
    </.panel_block_div>
    <%= if @selected_item.commands != [] and @selected_item.commands != nil do %>
      <.panel_block_div>
        <.icon_raw for="inspection-panel" color="auto" size="2rem" class="ml-1 mr-5" aria-hidden="true" />
        <div class="columns is-fullwidth mr-4">
          <%= for command <- @selected_item.commands do %>
              <button
                class="button is-info column is-2 m-2 is-fullwidth"
                phx-click={"command:#{command}"}
                phx-value-name={@selected_item.name}
                {if @selected_item.busy, do: [disabled: true], else: []}
              >
                <%= command %>
              </button>
          <% end %>
        </div>
      </.panel_block_div>
    <% end %>
    """
  end

  def items_block(assigns) do
    ~H"""
    <%= for {_name, item} <- @items do %>
      <div>
        <.panel_block
          class={"panel-block pt-3 #{if @selected_item != nil and @selected_item.name == item.name, do: "has-background-info-light"}"}
          phx-click="tap"
          phx-value-name={item.name}
        >
          <.icon_raw for={item.icon} color="auto" size="1.8rem" aria-hidden="true" />
          <%!-- <div class="mt-2 ml-2"> --%>
          <.subtitle class="ml-3">
            <%= item.name %>
          </.subtitle>
          <%!-- </div> --%>
        </.panel_block>
      </div>
    <% end %>
    """
  end
end