import type { ContactPoint, HumanName } from "fhir/r4";
import { formatFhirHumanName } from "./fhirHumanName.tsx";

export type RelatedPersonOptionView = {
  label: string;
  /** Unidentified people cannot be selected for record access. */
  selectable: boolean;
};

/** Builds a label and access-safe selection state for a related person. */
export const relatedPersonOption = (input: {
  name?: HumanName[];
  contact?: ContactPoint[];
  relationshipText?: string;
  loading?: boolean;
}): RelatedPersonOptionView => {
  const relationship = input.relationshipText
    ? input.relationshipText.charAt(0).toUpperCase() + input.relationshipText.slice(1)
    : "";
  const withRelationship = (value: string) => (relationship ? `${value} (${relationship})` : value);

  const projected = formatFhirHumanName(input.name, { emptyText: "" });
  if (projected) return { label: withRelationship(projected), selectable: true };

  // Contact identifies an invitation when its projected name is unavailable.
  const contact = (input.contact ?? []).map((c) => c.value).find((v) => !!v && v.trim() !== "");
  if (contact) return { label: withRelationship(contact), selectable: true };

  if (input.loading) return { label: "Loading…", selectable: false };

  return { label: "Name unavailable", selectable: false };
};