defmodule Surface.Components.Form.Select do
  @moduledoc """
  Defines a select.

  Provides a wrapper for PhoenixHTMLHelpers.Form's `select/4` function.

  All options passed via `opts` will be sent to `select/4`, `class` can
  be set directly and will override anything in `opts`.
  """

  use Surface.Component

  import PhoenixHTMLHelpers.Form, only: [select: 4]
  import Surface.Components.Form.Utils

  @doc "The form identifier"
  prop form, :form, from_context: {Surface.Components.Form, :form}

  @doc "The field name"
  prop field, :any, from_context: {Surface.Components.Form.Field, :field}

  @doc "The id of the corresponding select field"
  prop id, :string

  @doc "The name of the corresponding select field"
  prop name, :string

  @doc "The CSS class for the underlying tag"
  prop class, :css_class

  @doc "The options in the select"
  prop options, :any, default: []

  @doc "An option to include at the top of the options with the given prompt text"
  prop prompt, :string

  @doc "The default value to use when none was sent as parameter"
  prop selected, :any

  @doc "Options list"
  prop opts, :keyword, default: []

  def render(assigns) do
    helper_opts = props_to_opts(assigns, [:prompt, :selected])
    attr_opts = props_to_attr_opts(assigns, class: get_config(:default_class))

    opts =
      assigns.opts
      |> Keyword.merge(helper_opts)
      |> Keyword.merge(attr_opts)

    assigns = assign(assigns, opts: opts)

    ~F[{select(@form, @field, @options, @opts)}]
  end
end