defmodule Alpa.Models.Asset do
  @moduledoc """
  Asset information model.
  """
  use TypedStruct
  import Alpa.Helpers, only: [parse_decimal: 1]

  @type status :: :active | :inactive
  @type asset_class :: :us_equity | :crypto

  typedstruct do
    field(:id, String.t())
    field(:class, asset_class())
    field(:exchange, String.t())
    field(:symbol, String.t())
    field(:name, String.t())
    field(:status, status())
    field(:tradable, boolean())
    field(:marginable, boolean())
    field(:maintenance_margin_requirement, Decimal.t())
    field(:shortable, boolean())
    field(:easy_to_borrow, boolean())
    field(:fractionable, boolean())
    field(:min_order_size, Decimal.t())
    field(:min_trade_increment, Decimal.t())
    field(:price_increment, Decimal.t())
  end

  @doc """
  Parse asset data from API response.
  """
  @spec from_map(map()) :: t()
  def from_map(data) when is_map(data) do
    %__MODULE__{
      id: data["id"],
      class: parse_class(data["class"]),
      exchange: data["exchange"],
      symbol: data["symbol"],
      name: data["name"],
      status: parse_status(data["status"]),
      tradable: data["tradable"],
      marginable: data["marginable"],
      maintenance_margin_requirement: parse_decimal(data["maintenance_margin_requirement"]),
      shortable: data["shortable"],
      easy_to_borrow: data["easy_to_borrow"],
      fractionable: data["fractionable"],
      min_order_size: parse_decimal(data["min_order_size"]),
      min_trade_increment: parse_decimal(data["min_trade_increment"]),
      price_increment: parse_decimal(data["price_increment"])
    }
  end

  defp parse_class("us_equity"), do: :us_equity
  defp parse_class("crypto"), do: :crypto
  defp parse_class(_), do: nil

  defp parse_status("active"), do: :active
  defp parse_status("inactive"), do: :inactive
  defp parse_status(_), do: nil
end