defmodule LivebookWeb.SessionLive.InsertButtonsComponent do
  use LivebookWeb, :live_component

  def render(assigns) do
    ~H"""
    <div
      class="relative top-0.5 m-0 flex justify-center"
      role="toolbar"
      aria-label="insert new"
      data-el-insert-buttons
    >
      <div class={
        "w-full absolute z-10 hover:z-[11] #{if(@persistent, do: "opacity-100", else: "opacity-0")} hover:opacity-100 focus-within:opacity-100 flex space-x-2 justify-center items-center"
      }>
        <button
          class="button-base button-small"
          phx-click="insert_cell_below"
          phx-value-type="code"
          phx-value-section_id={@section_id}
          phx-value-cell_id={@cell_id}
        >
          + Code
        </button>
        <.menu id={"#{@id}-block-menu"} position="bottom-left">
          <:toggle>
            <button class="button-base button-small">+ Block</button>
          </:toggle>
          <:content>
            <button
              class="menu-item text-gray-500"
              role="menuitem"
              phx-click="insert_cell_below"
              phx-value-type="markdown"
              phx-value-section_id={@section_id}
              phx-value-cell_id={@cell_id}
            >
              <.remix_icon icon="markdown-fill" />
              <span class="font-medium">Markdown</span>
            </button>
            <button
              class="menu-item text-gray-500"
              role="menuitem"
              phx-click="insert_section_below"
              phx-value-section_id={@section_id}
              phx-value-cell_id={@cell_id}
            >
              <.remix_icon icon="h-2" />
              <span class="font-medium">Section</span>
            </button>
            <div class="my-2 border-b border-gray-200"></div>
            <button
              class="menu-item text-gray-500"
              role="menuitem"
              phx-click="insert_cell_below"
              phx-value-type="diagram"
              phx-value-section_id={@section_id}
              phx-value-cell_id={@cell_id}
            >
              <.remix_icon icon="organization-chart" />
              <span class="font-medium">Diagram</span>
            </button>
          </:content>
        </.menu>
        <%= cond do %>
          <% not Livebook.Runtime.connected?(@runtime) -> %>
            <button
              class="button-base button-small"
              phx-click={
                with_confirm(
                  JS.push("setup_default_runtime"),
                  title: "Setup runtime",
                  description: ~s'''
                  To see the available smart cells, you need a connected runtime.
                  Do you want to connect and setup the default one?
                  ''',
                  confirm_text: "Setup runtime",
                  confirm_icon: "play-line",
                  danger: false
                )
              }
            >
              + Smart
            </button>
          <% @smart_cell_definitions == [] -> %>
            <span class="tooltip right" data-tooltip="No smart cells available">
              <button class="button-base button-small" disabled>+ Smart</button>
            </span>
          <% true -> %>
            <.menu id={"#{@id}-smart-menu"} position="bottom-left">
              <:toggle>
                <button class="button-base button-small">+ Smart</button>
              </:toggle>
              <:content>
                <%= for definition <- Enum.sort_by(@smart_cell_definitions, & &1.name) do %>
                  <.smart_cell_insert_button
                    definition={definition}
                    section_id={@section_id}
                    cell_id={@cell_id}
                  />
                <% end %>
              </:content>
            </.menu>
        <% end %>
      </div>
    </div>
    """
  end

  defp smart_cell_insert_button(%{definition: %{requirement: %{variants: [_, _ | _]}}} = assigns) do
    ~H"""
    <.submenu>
      <button class="menu-item text-gray-500" role="menuitem">
        <span class="font-medium"><%= @definition.name %></span>
      </button>
      <:content>
        <%= for {variant, idx} <- Enum.with_index(@definition.requirement.variants) do %>
          <button
            class="menu-item text-gray-500"
            role="menuitem"
            phx-click={on_smart_cell_click(@definition, idx, @section_id, @cell_id)}
          >
            <span class="font-medium"><%= variant.name %></span>
          </button>
        <% end %>
      </:content>
    </.submenu>
    """
  end

  defp smart_cell_insert_button(assigns) do
    ~H"""
    <button
      class="menu-item text-gray-500"
      role="menuitem"
      phx-click={on_smart_cell_click(@definition, 0, @section_id, @cell_id)}
    >
      <span class="font-medium"><%= @definition.name %></span>
    </button>
    """
  end

  defp on_smart_cell_click(%{requirement: nil} = definition, _variant_idx, section_id, cell_id) do
    insert_smart_cell(definition, section_id, cell_id)
  end

  defp on_smart_cell_click(%{requirement: %{}} = definition, variant_idx, section_id, cell_id) do
    variant = Enum.fetch!(definition.requirement.variants, variant_idx)

    with_confirm(
      JS.push("add_smart_cell_dependencies",
        value: %{kind: definition.kind, variant_idx: variant_idx}
      )
      |> insert_smart_cell(definition, section_id, cell_id)
      |> JS.push("queue_cells_reevaluation"),
      title: "Add packages",
      description:
        case variant.packages do
          [%{name: name}] ->
            ~s'''
            The <span class="font-semibold">“#{definition.name}“</span>
            smart cell requires the #{code_tag(name)} package. Do you want to add
            it as a dependency and restart?
            '''

          packages ->
            ~s'''
            The <span class="font-semibold">“#{definition.name}“</span>
            smart cell requires the #{packages |> Enum.map(&code_tag(&1.name)) |> format_items()}
            packages. Do you want to add them as dependencies and restart?
            '''
        end,
      confirm_text: "Add and restart",
      confirm_icon: "add-line",
      danger: false,
      html: true
    )
  end

  defp code_tag(text), do: "<code>#{text}</code>"

  defp insert_smart_cell(js \\ %JS{}, definition, section_id, cell_id) do
    JS.push(js, "insert_cell_below",
      value: %{
        type: "smart",
        kind: definition.kind,
        section_id: section_id,
        cell_id: cell_id
      }
    )
  end
end