"use server";

import { revalidatePath } from "next/cache";
import { currentUserId } from "@/lib/auth/session";
import { runMutation, type ActionResult } from "@/lib/db/rpc";

const POSITION_PATHS = ["/positions", "/orgchart", "/"];

async function callRpc(
  fn: "create_position" | "update_position" | "delete_position",
  payload: Record<string, unknown>,
  revalidate: string[]
): Promise<ActionResult> {
  const result = await runMutation(await currentUserId(), fn, payload);
  if (!result.success) return result;
  for (const path of revalidate) revalidatePath(path);
  return result;
}

export async function createPosition(payload: {
  org_unit_id: string;
  job_title: string;
  is_chief: boolean;
  valid_from: string;
}): Promise<ActionResult> {
  return callRpc("create_position", payload, POSITION_PATHS);
}

/**
 * Ändert eine Planstelle.
 *
 * Weggelassene Felder bleiben, wie sie sind. `valid_to: null` beendet die
 * Befristung ausdrücklich — deshalb ist es hier `string | null` und nicht
 * optional: „nicht mitgeschickt" und „auf leer setzen" müssen unterscheidbar
 * bleiben.
 */
export async function updatePosition(payload: {
  position_id: string;
  org_unit_id?: string;
  job_title?: string;
  is_chief?: boolean;
  valid_from?: string;
  valid_to?: string | null;
}): Promise<ActionResult> {
  return callRpc("update_position", payload, POSITION_PATHS);
}

export async function deletePosition(positionId: string): Promise<ActionResult> {
  return callRpc("delete_position", { position_id: positionId }, POSITION_PATHS);
}