# SPDX-FileCopyrightText: 2025 diffo_example contributors <https://github.com/diffo-dev/diffo_example/graphs.contributors>
#
# SPDX-License-Identifier: MIT

defmodule DiffoExample.Access.Circuit do
  @moduledoc """
  Diffo - TMF Service and Resource Management with a difference

  Circuit - AshTyped Struct for Circuit Characteristic Value
  """
  use Ash.TypedStruct, extensions: [AshJason.TypedStruct, AshOutstanding.TypedStruct]

  alias DiffoExample.Access.BandwidthProfile

  jason do
    pick [:circuit_id, :cvlan_id, :vci, :encapsulation, :bandwidth_profile]
    compact(true)
  end

  outstanding do
    expect [:circuit_id]
  end

  typed_struct do
    field :circuit_id, :string,
      constraints: [match: ~r/Q[A-Z]{4}\d{4} eth \d{1,4}:\d{1,4}/],
      description: "the circuit id"

    field :cvlan_id, :integer,
      default: 0,
      constraints: [min: 0, max: 4095],
      description: "the circuit cvlan id"

    field :vci, :integer,
      default: 0,
      constraints: [min: 0, max: 4095],
      description: "the circuit vci"

    field :encapsulation, :atom,
      default: :IPoE,
      constraints: [one_of: [:PPPoA, :PPPoE, :IPoE]],
      description: "the circuit encapsulation"

    field :bandwidth_profile, :struct,
      constraints: [instance_of: BandwidthProfile],
      description: "the circuit bandwidth profile"
  end

  defimpl String.Chars do
    def to_string(struct) do
      inspect(struct)
    end
  end
end