defmodule SpaceDust.Data.IAU1980Data do
  defstruct [
    :a1,
    :a2,
    :a3,
    :a4,
    :a5,
    :ai,
    :bi,
    :ci,
    :di
  ]
end

defmodule SpaceDust.Data.IAU1980 do
  @moduledoc """
  IAU 1980 Nutation Theory data
  """
  alias SpaceDust.Data.IAU1980Data, as: IAU1980Data

  @data [
    [0, 0, 0, 0, 1, -171_996, -174.2, 92025, 8.9],
    [0, 0, 2, -2, 2, -13187, -1.6, 5736, -3.1],
    [0, 0, 2, 0, 2, -2274, -0.2, 977, -0.5],
    [0, 0, 0, 0, 2, 2062, 0.2, -895, 0.5],
    [0, 1, 0, 0, 0, 1426, -3.4, 54, -0.1],
    [1, 0, 0, 0, 0, 712, 0.1, -7, 0],
    [0, 1, 2, -2, 2, -517, 1.2, 224, -0.6],
    [0, 0, 2, 0, 1, -386, -0.4, 200, 0],
    [1, 0, 2, 0, 2, -301, 0, 129, -0.1],
    [0, -1, 2, -2, 2, 217, -0.5, -95, 0.3],
    [1, 0, 0, -2, 0, -158, 0, -1, 0],
    [0, 0, 2, -2, 1, 129, 0.1, -70, 0],
    [-1, 0, 2, 0, 2, 123, 0, -53, 0],
    [1, 0, 0, 0, 1, 63, 0.1, -33, 0],
    [0, 0, 0, 2, 0, 63, 0, -2, 0],
    [-1, 0, 2, 2, 2, -59, 0, 26, 0],
    [-1, 0, 0, 0, 1, -58, -0.1, 32, 0],
    [1, 0, 2, 0, 1, -51, 0, 27, 0],
    [2, 0, 0, -2, 0, 48, 0, 1, 0],
    [-2, 0, 2, 0, 1, 46, 0, -24, 0],
    [0, 0, 2, 2, 2, -38, 0, 16, 0],
    [2, 0, 2, 0, 2, -31, 0, 13, 0],
    [2, 0, 0, 0, 0, 29, 0, -1, 0],
    [1, 0, 2, -2, 2, 29, 0, -12, 0],
    [0, 0, 2, 0, 0, 26, 0, -1, 0],
    [0, 0, 2, -2, 0, -22, 0, 0, 0],
    [-1, 0, 2, 0, 1, 21, 0, -10, 0],
    [0, 2, 0, 0, 0, 17, -0.1, 0, 0],
    [0, 2, 2, -2, 2, -16, 0.1, 7, 0],
    [-1, 0, 0, 2, 1, 16, 0, -8, 0],
    [0, 1, 0, 0, 1, -15, 0, 9, 0],
    [1, 0, 0, -2, 1, -13, 0, 7, 0],
    [0, -1, 0, 0, 1, -12, 0, 6, 0],
    [2, 0, -2, 0, 0, 11, 0, 0, 0],
    [-1, 0, 2, 2, 1, -10, 0, 5, 0],
    [1, 0, 2, 2, 2, -8, 0, 3, 0],
    [0, -1, 2, 0, 2, -7, 0, 3, 0],
    [0, 0, 2, 2, 1, -7, 0, 3, 0],
    [1, 1, 0, -2, 0, -7, 0, 0, 0],
    [0, 1, 2, 0, 2, 7, 0, -3, 0],
    [-2, 0, 0, 2, 1, -6, 0, 3, 0],
    [0, 0, 0, 2, 1, -6, 0, 3, 0],
    [2, 0, 2, -2, 2, 6, 0, -3, 0],
    [1, 0, 0, 2, 0, 6, 0, 0, 0],
    [1, 0, 2, -2, 1, 6, 0, -3, 0],
    [0, 0, 0, -2, 1, -5, 0, 3, 0],
    [0, -1, 2, -2, 1, -5, 0, 3, 0],
    [2, 0, 2, 0, 1, -5, 0, 3, 0],
    [1, -1, 0, 0, 0, 5, 0, 0, 0],
    [1, 0, 0, -1, 0, -4, 0, 0, 0],
    [0, 0, 0, 1, 0, -4, 0, 0, 0],
    [0, 1, 0, -2, 0, -4, 0, 0, 0],
    [1, 0, -2, 0, 0, 4, 0, 0, 0],
    [2, 0, 0, -2, 1, 4, 0, -2, 0],
    [0, 1, 2, -2, 1, 4, 0, -2, 0],
    [1, 1, 0, 0, 0, -3, 0, 0, 0],
    [1, -1, 0, -1, 0, -3, 0, 0, 0],
    [-1, -1, 2, 2, 2, -3, 0, 1, 0],
    [0, -1, 2, 2, 2, -3, 0, 1, 0],
    [1, -1, 2, 0, 2, -3, 0, 1, 0],
    [3, 0, 2, 0, 2, -3, 0, 1, 0],
    [-2, 0, 2, 0, 2, -3, 0, 1, 0],
    [1, 0, 2, 0, 0, 3, 0, 0, 0],
    [-1, 0, 2, 4, 2, -2, 0, 1, 0],
    [1, 0, 0, 0, 2, -2, 0, 1, 0],
    [-1, 0, 2, -2, 1, -2, 0, 1, 0],
    [0, -2, 2, -2, 1, -2, 0, 1, 0],
    [-2, 0, 0, 0, 1, -2, 0, 1, 0],
    [2, 0, 0, 0, 1, 2, 0, -1, 0],
    [3, 0, 0, 0, 0, 2, 0, 0, 0],
    [1, 1, 2, 0, 2, 2, 0, -1, 0],
    [0, 0, 2, 1, 2, 2, 0, -1, 0],
    [1, 0, 0, 2, 1, -1, 0, 0, 0],
    [1, 0, 2, 2, 1, -1, 0, 1, 0],
    [1, 1, 0, -2, 1, -1, 0, 0, 0],
    [0, 1, 0, 2, 0, -1, 0, 0, 0],
    [0, 1, 2, -2, 0, -1, 0, 0, 0],
    [0, 1, -2, 2, 0, -1, 0, 0, 0],
    [1, 0, -2, 2, 0, -1, 0, 0, 0],
    [1, 0, -2, -2, 0, -1, 0, 0, 0],
    [1, 0, 2, -2, 0, -1, 0, 0, 0],
    [1, 0, 0, -4, 0, -1, 0, 0, 0],
    [2, 0, 0, -4, 0, -1, 0, 0, 0],
    [0, 0, 2, 4, 2, -1, 0, 0, 0],
    [0, 0, 2, -1, 2, -1, 0, 0, 0],
    [-2, 0, 2, 4, 2, -1, 0, 1, 0],
    [2, 0, 2, 2, 2, -1, 0, 0, 0],
    [0, -1, 2, 0, 1, -1, 0, 0, 0],
    [0, 0, -2, 0, 1, -1, 0, 0, 0],
    [0, 0, 4, -2, 2, 1, 0, 0, 0],
    [0, 1, 0, 0, 2, 1, 0, 0, 0],
    [1, 1, 2, -2, 2, 1, 0, -1, 0],
    [3, 0, 2, -2, 2, 1, 0, 0, 0],
    [-2, 0, 2, 2, 2, 1, 0, -1, 0],
    [-1, 0, 0, 0, 2, 1, 0, -1, 0],
    [0, 0, -2, 2, 1, 1, 0, 0, 0],
    [0, 1, 2, 0, 1, 1, 0, 0, 0],
    [-1, 0, 4, 0, 2, 1, 0, 0, 0],
    [2, 1, 0, -2, 0, 1, 0, 0, 0],
    [2, 0, 0, 2, 0, 1, 0, 0, 0],
    [2, 0, 2, -2, 1, 1, 0, -1, 0],
    [2, 0, -2, 0, 1, 1, 0, 0, 0],
    [1, -1, 0, -2, 0, 1, 0, 0, 0],
    [-1, 0, 0, 1, 1, 1, 0, 0, 0],
    [-1, -1, 0, 2, 1, 1, 0, 0, 0],
    [0, 1, 0, 1, 0, 1, 0, 0, 0]
  ]

  def getCoefficients(rowIndex) do
    row = Enum.at(@data, rowIndex)

    %IAU1980Data{
      a1: Enum.at(row, 0),
      a2: Enum.at(row, 1),
      a3: Enum.at(row, 2),
      a4: Enum.at(row, 3),
      a5: Enum.at(row, 4),
      ai: Enum.at(row, 5),
      bi: Enum.at(row, 6),
      ci: Enum.at(row, 7),
      di: Enum.at(row, 8)
    }
  end
end