defmodule LivebookWeb.Hub.Edit.FlyComponent do
  use LivebookWeb, :live_component

  alias Livebook.Hubs.{Fly, FlyClient}
  alias LivebookWeb.LayoutHelpers

  @impl true
  def update(assigns, socket) do
    changeset = Fly.change_hub(assigns.hub)
    {:ok, app} = FlyClient.fetch_app(assigns.hub)
    env_vars = env_vars_from_secrets(app["secrets"])

    env_var =
      if name = assigns.env_var_id do
        Enum.find(env_vars, &(&1.name == name))
      end

    {:ok,
     socket
     |> assign(assigns)
     |> assign(
       app_url: "https://fly.io/apps/#{app["name"]}",
       changeset: changeset,
       env_vars: env_vars,
       env_var: env_var
     )}
  end

  defp env_vars_from_secrets(secrets) do
    for secret <- secrets do
      %Livebook.Settings.EnvVar{name: secret["name"]}
    end
  end

  @impl true
  def render(assigns) do
    ~H"""
    <div id={"#{@id}-component"} class="space-y-8">
      <div class="flex relative">
        <LayoutHelpers.title text={"#{@hub.hub_emoji} #{@hub.hub_name}"} />

        <button
          phx-click={
            with_confirm(
              JS.push("delete_hub", value: %{id: @hub.id}),
              title: "Delete hub",
              description: "Are you sure you want to delete this hub?",
              confirm_text: "Delete",
              confirm_icon: "close-circle-line"
            )
          }
          class="absolute right-0 button-base button-red"
        >
          Delete hub
        </button>
      </div>
      <div class="flex flex-col space-y-10">
        <div class="flex flex-col space-y-2">
          <div class="flex items-center justify-between border border-gray-200 rounded-lg p-4">
            <div class="flex items-center space-x-12">
              <.labeled_text label="Application ID">
                <%= @hub.application_id %>
              </.labeled_text>
              <.labeled_text label="Type">
                Fly
              </.labeled_text>
            </div>

            <a href={@app_url} class="button-base button-outlined-gray" target="_blank">
              <.remix_icon icon="dashboard-2-line" class="align-middle mr-1" />
              <span>Manage app on Fly</span>
            </a>
          </div>
        </div>

        <div class="flex flex-col space-y-2">
          <h2 class="text-xl text-gray-800 font-medium pb-2 border-b border-gray-200">
            General
          </h2>

          <.form
            :let={f}
            id={@id}
            class="flex flex-col mt-4 space-y-4"
            for={@changeset}
            phx-submit="save"
            phx-change="validate"
            phx-target={@myself}
          >
            <div class="grid grid-cols-1 md:grid-cols-2 gap-3">
              <.text_field field={f[:hub_name]} label="Name" />
              <.emoji_field field={f[:hub_emoji]} label="Emoji" />
            </div>
            <div>
              <button
                class="button-base button-blue"
                phx-disable-with="Updating..."
                disabled={not @changeset.valid?}
              >
                Update Hub
              </button>
            </div>
          </.form>
        </div>

        <div class="flex flex-col space-y-4">
          <h2 class="text-xl text-gray-800 font-medium pb-2 border-b border-gray-200">
            Environment Variables
          </h2>

          <.live_component
            module={LivebookWeb.EnvVarsComponent}
            id="env-vars"
            env_vars={@env_vars}
            return_to={~p"/hub/#{@hub.id}"}
            add_env_var_path={~p"/hub/#{@hub.id}/env-var/new"}
            edit_label="Replace"
            target={@myself}
          />
        </div>
      </div>

      <.modal
        :if={@live_action in [:add_env_var, :edit_env_var]}
        id="env-var-modal"
        show
        width={:medium}
        target={@myself}
        patch={~p"/hub/#{@hub.id}"}
      >
        <.live_component
          module={LivebookWeb.EnvVarComponent}
          id="env-var"
          on_save={JS.push("save_env_var", target: @myself)}
          env_var={@env_var}
          headline="Configute your Fly application system environment variables"
          return_to={~p"/hub/#{@hub.id}"}
        />
      </.modal>
    </div>
    """
  end

  @impl true
  def handle_event("save", %{"fly" => params}, socket) do
    case Fly.update_hub(socket.assigns.hub, params) do
      {:ok, hub} ->
        {:noreply,
         socket
         |> put_flash(:success, "Hub updated successfully")
         |> push_navigate(to: ~p"/hub/#{hub.id}")}

      {:error, changeset} ->
        {:noreply, assign(socket, changeset: changeset)}
    end
  end

  def handle_event("validate", %{"fly" => attrs}, socket) do
    {:noreply, assign(socket, changeset: Fly.validate_hub(socket.assigns.hub, attrs))}
  end

  # EnvVar component callbacks

  def handle_event("save_env_var", %{"env_var" => attrs}, socket) do
    env_operation = attrs["operation"]
    attrs = %{"key" => attrs["name"], "value" => attrs["value"]}

    case FlyClient.set_secrets(socket.assigns.hub, [attrs]) do
      {:ok, _} ->
        message =
          if env_operation == "new",
            do: "Environment variable added",
            else: "Environment variable updated"

        {:noreply,
         socket
         |> put_flash(:success, message)
         |> push_navigate(to: ~p"/hub/#{socket.assigns.hub.id}")}

      {:error, _} ->
        message =
          if env_operation == "new",
            do: "Failed to add environment variable",
            else: "Failed to update environment variable"

        {:noreply,
         socket
         |> put_flash(:error, message)
         |> push_navigate(to: ~p"/hub/#{socket.assigns.hub.id}")}
    end
  end

  def handle_event("edit_env_var", %{"env_var" => key}, socket) do
    {:noreply, push_patch(socket, to: ~p"/hub/#{socket.assigns.hub.id}/env-var/edit/#{key}")}
  end

  def handle_event("delete_env_var", %{"env_var" => key}, socket) do
    case FlyClient.unset_secrets(socket.assigns.hub, [key]) do
      {:ok, _} ->
        {:noreply,
         socket
         |> put_flash(:success, "Environment variable deleted")
         |> push_navigate(to: ~p"/hub/#{socket.assigns.hub.id}")}

      {:error, _} ->
        {:noreply,
         socket
         |> put_flash(:error, "Failed to delete environment variable")
         |> push_navigate(to: ~p"/hub/#{socket.assigns.hub.id}")}
    end
  end
end