defmodule Fitparser.Native do
  @moduledoc """
  Fitparser allows to parse fit files generated by sport trackers.
  It is a rustler wrapper for [fitparser rust crate](https://docs.rs/fitparser/latest/fitparser/)
  """
  use Rustler, otp_app: :fitparser, crate: "fitparser_native"

  defmodule FitDataRecord do
    @moduledoc """
    Used just for defining the atoms.
    These are required when serializing from the rust side
    """
    defstruct [
      :kind,
      :fields
    ]
  end

  defmodule FitDataField do
    @moduledoc """
    Used just for defining the atoms.
    These are required when serializing from the rust side
    """
    defstruct [
      :name,
      :value,
      :units,
      :number
    ]
  end

  @doc """
  this function accepts binary fit file and returns the file converted to term
  """
  def from_fit(_a), do: :erlang.nif_error(:nif_not_loaded)

  def from_fit!(a) do
    case from_fit(a) do
      {:ok, result} -> result
      {:error, err} -> raise err
    end
  end

  @doc """
  this function accepts a path to a file and returns the file converted to term
  """
  def load_fit(_a), do: :erlang.nif_error(:nif_not_loaded)

  def load_fit!(a) do
    case load_fit(a) do
      {:ok, result} -> result
      {:error, err} -> raise err
    end
  end
end