defmodule PhilomenaWeb.Profile.Commission.ItemController do
  use PhilomenaWeb, :controller

  alias Philomena.Commissions.Item
  alias Philomena.Commissions
  alias Philomena.Users.User
  alias Philomena.Repo

  plug PhilomenaWeb.FilterBannedUsersPlug
  plug :load_resource, model: User, id_name: "profile_id", id_field: "slug", preload: [:verified_links, commission: [sheet_image: :tags, user: [awards: :badge], items: [example_image: :tags]]], persisted: true
  plug :ensure_commission
  plug :ensure_correct_user

  def new(conn, _params) do
    user = conn.assigns.user
    commission = user.commission

    changeset = Commissions.change_item(%Item{})
    render(conn, "new.html", user: user, commission: commission, changeset: changeset)
  end

  def create(conn, %{"item" => item_params}) do
    user = conn.assigns.user
    commission = user.commission

    case Commissions.create_item(commission, item_params) do
      {:ok, _item} ->
        conn
        |> put_flash(:info, "Item successfully created.")
        |> redirect(to: Routes.profile_commission_path(conn, :show, conn.assigns.user))

      {:error, changeset} ->
        render(conn, "new.html", user: user, commission: commission, changeset: changeset)
    end
  end

  def edit(conn, %{"id" => id}) do
    user = conn.assigns.user
    commission = user.commission
    item = Repo.get_by!(Item, commission_id: commission.id, id: id)

    changeset = Commissions.change_item(item)
    render(conn, "edit.html", user: user, commission: commission, item: item, changeset: changeset)
  end

  def update(conn, %{"id" => id, "item" => item_params}) do
    user = conn.assigns.user
    commission = user.commission
    item = Repo.get_by!(Item, commission_id: commission.id, id: id)

    case Commissions.update_item(item, item_params) do
      {:ok, _commission} ->
        conn
        |> put_flash(:info, "Item successfully updated.")
        |> redirect(to: Routes.profile_commission_path(conn, :show, conn.assigns.user))

      {:error, changeset} ->
        render(conn, "edit.html", user: user, commission: commission, item: item, changeset: changeset)
    end
  end

  def delete(conn, %{"id" => id}) do
    user = conn.assigns.user
    commission = user.commission
    item = Repo.get_by!(Item, commission_id: commission.id, id: id)

    {:ok, _item} = Commissions.delete_item(item)

    conn
    |> put_flash(:info, "Item deleted successfully.")
    |> redirect(to: Routes.profile_commission_path(conn, :show, conn.assigns.user))
  end

  defp ensure_commission(conn, _opts) do
    case is_nil(conn.assigns.user.commission) do
      true  -> PhilomenaWeb.NotFoundPlug.call(conn)
      false -> conn
    end
  end

  defp ensure_correct_user(conn, _opts) do
    user_id = conn.assigns.user.id

    case conn.assigns.current_user do
      %{id: ^user_id} -> conn
      _other          -> PhilomenaWeb.NotAuthorizedPlug.call(conn)
    end
  end
end