automation for products that creates nutritional targets?

Settings a trainer would have to choose:
protein intake: X gr per KG body weight or a percentage.
fat intake: percentage or available cals
carb intake: total gr, percentage or available cals
surplus/deficit: in percentages, -5%, 0% +5% etc.
Choose 2, and Trz calculates the third automatically based on total calories.

Then the trainer can adjust afterwards if needed, or part of the provided service.