defmodule TestSpec do
  @moduledoc false

  # ============================================================================

  defmodule P do
    @moduledoc false
    use Etiquette.Spec

    packet "p" do
      field "x", 4
      field "y", 4, id: :y
      field "z", (..), length_by: :y
    end

    packet "x" do
      field "x", 1
    end
  end

  # ============================================================================

  defmodule Pack do
    @moduledoc false
    use Etiquette.Spec

    packet "Pack", id: :pack do
      field "Type", 2
      field "Data Length", 2, id: :length
      field "Data", (..), length_by: :length
    end
  end

  # ============================================================================

  defmodule Example.Spec do
    @moduledoc false
    use Etiquette.Spec

    packet "Header Packet", id: :header_packet do
      field "Header Fixed", 1, fixed: 1, doc: "Whether the packet is a header."
      field "Packet Type", 2, doc: "The type of the payload. Can be any 0-3 integer."
      field "Type-Specific fields", (..), id: :type_specific_fields, doc: "The packet payload."
    end

    packet "Hello Packet", of: :header_packet do
      field "Packet Type", 2, fixed: 0b00
      field "Hello-specific payload", 8, part_of: :type_specific_fields
    end

    packet "Conversation Packet", of: :header_packet do
      field "Packet Type", 2, fixed: 0b01
      field "Conversation-specific payload", 8, part_of: :type_specific_fields
    end

    packet "Bye Packet", of: :header_packet do
      field "Packet Type", 2, fixed: 0b11
      field "Bye-specific payload", 8, part_of: :type_specific_fields
    end

    def compile_test do
      is_header_packet?(<<>>)
      is_hello_packet?(<<>>)
      is_conversation_packet?(<<>>)
      is_bye_packet?(<<>>)
      parse_header_packet(<<>>)
      parse_hello_packet(<<>>)
      parse_conversation_packet(<<>>)
      parse_bye_packet(<<>>)
      build_header_packet(nil, nil)
      build_hello_packet(nil)
      build_conversation_packet(nil)
      build_bye_packet(nil)
    end
  end

  # ============================================================================

  defmodule Spec do
    @moduledoc false
    use Etiquette.Spec

    packet "Header", id: :header do
      field "Type", 2
      field "Data", (..)
    end

    packet "Type 0", id: :type_0, of: :header do
      field "Type", 2, fixed: 0b00
      field "Data", (..)
    end

    packet "Type 1", id: :type_1, of: :header do
      field "Type", 2, fixed: 0b01
      field "Data", (..)
    end
  end
end