defmodule Localiser.Domain.Schema.SensorCalibration do
  use Ecto.Schema
  import Ecto.Changeset

  alias Localiser.Domain.Schema.Sensor

  @timestamps_opts [inserted_at: :inserted_at, updated_at: false, type: :utc_datetime]

  schema "sensor_calibrations" do
    field :rssi_ref, :integer
    field :path_loss_exp, :float
    field :calibrated_at, :utc_datetime

    belongs_to :sensor, Sensor

    timestamps(@timestamps_opts)
  end

  @doc false
  def changeset(calibration, attrs) do
    calibration
    |> cast(attrs, [:sensor_id, :rssi_ref, :path_loss_exp, :calibrated_at])
    |> validate_required([:sensor_id, :rssi_ref, :path_loss_exp, :calibrated_at])
    |> assoc_constraint(:sensor)
  end
end