helpers do
  def anonymous_id
    auid = cookies[:anonymous_user_id]
    if auid.nil?
      auid = AnonymousUser.uid
      response.set_cookie('anonymous_user_id', :path=> '/', :httponly => true, :value=>auid, :expires=>Time.now+100.year)
    end
    auid
  end
end

get '/cart' do
  # -1 is a placeholder for user id when we implement users
  # auid will still be used in case user is not logged in
  Cart.find_or_create(anonymous_id, -1).to_json
end

# gets number of items in cart for every item
get '/cart/item' do
  Cart.find_or_create(anonymous_id, -1).item_in_carts.to_json
end


update_cart_item = ->() {
  cart_id = Cart.find_or_create(anonymous_id, -1).id
  item_id = @json_params["item_id"].to_i
  count = @json_params["count"].to_i
  ItemInCart.update_state(cart_id, item_id, count).to_json
}
put '/cart/item', &update_cart_item
post '/cart/item', &update_cart_item


# gets list of items in cart without count
get '/cart/item/display' do 
  cart = Cart.find_or_create(anonymous_id, -1)
  item_ids = cart.item_in_carts.map do |x|
   x.item_id
  end
  items = []
  items = Item.find(item_ids) if cart.item_in_carts.length > 0 
  prepare_items_for_mass_display(items)
end