import type { NutritionOrder } from 'fhir/r4';

/**
 * What a nutrition order's oral diet is, line by line, for its list row: the diet's types first (their text, or a
 * coding's display), then its textures. A coded diet filed from a note carries its type and no texture, and reading
 * textures alone called it "not available" while its type was right there.
 */
export const dietLines = (order: NutritionOrder): string[] => {
    const diet = order.oralDiet;
    const types = (diet?.type ?? [])
        .map((type) => type.text?.trim() || type.coding?.find((coding) => coding.display?.trim())?.display?.trim())
        .filter((line): line is string => Boolean(line));
    const textures = (diet?.texture ?? [])
        .map((texture) => texture.foodType?.text?.trim())
        .filter((line): line is string => Boolean(line));
    return [...types, ...textures];
};