import type { TechStepView } from "@batch-cooking/shared";

/**
 * The display label for a technique — its French catalog label
 * (`t(\`catalog.techSteps.${key}\`)`) for a real seeded technique, or the
 * user's verbatim text for a **placeholder** (`isPlaceholder`, the free text
 * a user typed while correcting a step when the catalog was missing the
 * technique — issue #130, `TechStep.isPlaceholder` in schema.prisma), which
 * has no i18n key at all. Same `displayName ?? t(...)` split as
 * `ingredients/ingredient-label.ts`; `t` is passed in so this stays a plain
 * function.
 */
export function techStepLabel(
  techStep: Pick<TechStepView, "key" | "isPlaceholder" | "displayName">,
  t: (key: string) => string,
): string {
  return techStep.isPlaceholder && techStep.displayName !== null
    ? techStep.displayName
    : t(`catalog.techSteps.${techStep.key}`);
}