defmodule PolicyService.Aggregates.CarPolicyApplication do
  use PolicyService.Aggregates.PolicyApplication,
    policy_type: "car",
    commands: PolicyService.Commands.CarPolicy

  @valid_use_types ~w(private commercial bus taxi school)
  @valid_car_types ~w(sedan suv hatchback coupe convertible pickup van minivan truck)

  def validate_insured_object(%{
        "plate" => plate,
        "make" => make,
        "model" => model,
        "year" => year,
        "use_type" => use_type,
        "car_type" => car_type,
        "rc_limits" => _rc_limits,
        "market_value" => market_value,
        "requested_value" => requested_value
      })
      when is_binary(plate) and is_binary(make) and is_binary(model) and
             is_integer(year) and
             is_number(market_value) and market_value > 0 and
             is_number(requested_value) and requested_value > 0 and
             is_binary(use_type) and byte_size(use_type) > 0 and
             is_binary(car_type) and byte_size(car_type) > 0 do
    cond do
      year < 1886 or year > Date.utc_today().year + 1 -> {:error, :invalid_car_year}
      use_type not in @valid_use_types -> {:error, :invalid_use_type}
      car_type not in @valid_car_types -> {:error, :invalid_car_type}
      byte_size(plate) == 0 -> {:error, :missing_plate}
      true -> :ok
    end
  end

  def validate_insured_object(%{
        "plate" => plate,
        "make" => make,
        "model" => model,
        "year" => year,
        "use_type" => use_type,
        "car_type" => car_type,
        "chassis_number" => chassis,
        "engine_number" => engine,
        "rc_limits" => _rc_limits,
        "market_value" => market_value,
        "requested_value" => requested_value
      })
      when is_binary(plate) and is_binary(make) and is_binary(model) and
             is_integer(year) and
             is_number(market_value) and market_value > 0 and
             is_number(requested_value) and requested_value > 0 and
             is_binary(use_type) and byte_size(use_type) > 0 and
             is_binary(car_type) and byte_size(car_type) > 0 and
             is_binary(chassis) and is_binary(engine) do
    cond do
      year < 1886 or year > Date.utc_today().year + 1 -> {:error, :invalid_car_year}
      use_type not in @valid_use_types -> {:error, :invalid_use_type}
      car_type not in @valid_car_types -> {:error, :invalid_car_type}
      byte_size(plate) == 0 -> {:error, :missing_plate}
      true -> :ok
    end
  end

  def validate_insured_object(_), do: {:error, :invalid_car_details}
end