import type { components } from "../api/schema";

type FieldDefinitionView = components["schemas"]["FieldDefinitionView"];

export type FieldGroup = { group: string; defs: FieldDefinitionView[] };

/** Group field definitions by `def.group` (trimmed), preserving definition order
 *  within and across groups; ungrouped defs fall into a trailing `otherLabel` bucket. */
export function groupDefinitions(
  definitions: FieldDefinitionView[],
  otherLabel: string,
): FieldGroup[] {
  const groups: FieldGroup[] = [];

  for (const def of definitions) {
    const group = def.group?.trim() ? def.group : otherLabel;
    let bucket = groups.find((g) => g.group === group);

    if (!bucket) {
      bucket = { group, defs: [] };
      groups.push(bucket);
    }

    bucket.defs.push(def);
  }

  groups.sort((a, b) => Number(a.group === otherLabel) - Number(b.group === otherLabel));

  return groups;
}