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

  typed_embedded_schema null: false do
    field :id, Ecto.UUID
    field :type, :string, default: @resource_type
    field :level, :integer

    field(:children, {:array, PolymorphicEmbed},
      types: map(NLdoc.Spec.paragraph_children()),
      type_field_name: :type,
      on_replace: :delete,
      default: [],
      array?: true
    ) :: [NLdoc.Spec.paragraph_child()]

    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, :level], @cast_opts)
    |> cast_polymorphic_embed(:children, @cast_opts)
    |> cast_polymorphic_embed(:descriptors, @cast_opts)
    |> validate_required([:id, :type, :level])
    |> validate_inclusion(:type, [@resource_type])
    |> validate_number(:level, greater_than: 0)
  end
end