import { ok, type ReadonlyDB } from "@tailor-platform/erp-kit/core";
import type { DB } from "../generated/kysely-tailordb";

export interface GetPositionInput {
  id: string;
}

/**
 * Function: getPosition
 * Retrieves a single Position generation by its id, returning the post's
 * Department/Site placement, JobProfile reference, status, and headcount
 * as of that generation. Returns any status — the caller already has a
 * reference to this specific generation.
 */
export async function run(db: ReadonlyDB<DB>, input: GetPositionInput) {
  const position = await db
    .selectFrom("Position")
    .selectAll()
    .where("id", "=", input.id)
    .executeTakeFirst();

  return ok({ position: position ?? null });
}