defmodule BoutiqueSuggestions do
  @moduledoc """
  Your work at the online fashion boutique store continues. You come up with the idea for a website feature where an outfit is suggested to the user. While you want to give lots of suggestions, you don't want to give bad suggestions, so you decide to use a list comprehension since you can easily generate outfit combinations, then filter them by some criteria.
  """

  @type boutique_item() :: %{item_name: String.t(), price: float(), base_color: String.t()}

  @doc """
  Generate carthesian list of recomended product pairs Filter out clashing outfits. Using maximum_price in the options keyword list for filter products by price
  """

  @spec get_combinations([boutique_item()], [boutique_item()], Keyword.t()) :: [{boutique_item(), boutique_item()}]
  def get_combinations(tops, bottoms, options \\ [{:maximum_price, 100}]) do
    maximum_price = Keyword.get(options, :maximum_price, 100.0)

    for top <- tops,
        bottom <- bottoms,
        top.base_color != bottom.base_color,
        top.price + bottom.price <= maximum_price do
      {top, bottom}
    end
  end
end