Shopify Scripts - % off on W if X, Y, Z in cart

discounted_product = 1522083265
products_needed = [592406273, 4283854977, 4284984897]
products_seen = []

Input.cart.line_items.each do |line_item|
  product = line_item.variant.product
  products_seen << product.id if products_needed.include?(product.id)
end

Input.cart.line_items.each do |line_item|
  product = line_item.variant.product
  next unless product.id == discounted_product
  line_item.change_line_price(line_item.line_price * 0.90, message: "My Sale") if products_seen.uniq.sort == products_needed.uniq.sort
end

Output.cart = Input.cart