sagents

defmodule <%= @context_module %>.Conversation do
  @moduledoc """
  Schema for conversations.

  A conversation represents a series of interactions between a user and an AI agent.
  """

  use Ecto.Schema
  import Ecto.Changeset

  alias __MODULE__
  alias <%= @context_module %>.AgentState
  alias <%= @context_module %>.DisplayMessage

  @primary_key {:id, :binary_id, autogenerate: true}
  @foreign_key_type :binary_id

  schema "<%= @table_prefix %>conversations" do
<%= if @owner_type != "none" do %>    belongs_to :<%= @owner_type %>, <%= @owner_module %>, foreign_key: :<%= @owner_field %>, type: :id
<% end %>    has_one :agent_state, AgentState
    has_many :display_messages, DisplayMessage

    field :title, :string
    field :version, :integer, default: 1
    field :metadata, :map, default: %{}

    timestamps(type: :utc_datetime_usec)
  end

  @doc false
  def create_changeset(owner_id, attrs) do
    %Conversation{}
    |> cast(attrs, [:title, :version, :metadata])
    |> put_change(:<%= @owner_field %>, owner_id)
    |> common_validations()
  end

  @doc false
  def changeset(%Conversation{} = conversation, attrs) do
    conversation
    |> cast(attrs, [:title, :version, :metadata])
    |> common_validations()
  end

  defp common_validations(changeset) do
    changeset
    |> validate_required([:<%= @owner_field %>])
    |> validate_length(:title, max: 255)
    |> foreign_key_constraint(:<%= @owner_field %>)
  end
end