defmodule NLdoc.Spec.Link do
  @moduledoc """
  This module defines the Ecto schema for the NLdoc spec Link object.
  """
  use NLdoc.Spec.Schema, type: "https://spec.nldoc.nl/Resource/Link"

  typed_embedded_schema null: false do
    field :id, Ecto.UUID
    field :type, :string, default: @resource_type
    field :text, :string, default: ""
    field :uri, :string
    field :purpose, :string, null: true

    field :styling, {:array, Ecto.Enum},
      values: NLdoc.Spec.text_styling(),
      default: []

    field(:descriptors, {:array, PolymorphicEmbed},
      types: map(NLdoc.Spec.descriptors()),
      type_field_name: :type,
      on_replace: :delete,
      default: [],
      array?: true
    ) :: [NLdoc.Spec.descriptor()]
  end

  def changeset(object, attrs) do
    object
    |> cast(attrs, [:id, :type, :text, :styling, :uri, :purpose], @cast_opts)
    |> cast_polymorphic_embed(:descriptors, @cast_opts)
    |> validate_required([:id, :type, :text, :uri])
    |> validate_inclusion(:type, [@resource_type])
    |> validate_length(:purpose, min: 1)
  end
end