import "server-only";
import { query } from "@/lib/db";
import { loadTranslationsFor } from "./translations";
import type { MenuEntry } from "@/lib/types";

interface MenuEntryRow {
  id: string;
  menu_date: string;
  section_key: string;
  position: number;
  dish_id: string;
  name: string;
  price: string;
  allergens: string[];
  additives: string[];
}

/** Wochenplan-Einträge inkl. zugehörigem Gericht für den Zeitraum laden –
 *  gemeinsam von der öffentlichen Speisekarte (Server Component) und
 *  /api/menu-entries genutzt, damit der JOIN nur einmal gepflegt wird. */
export async function loadMenuEntries(fromISO: string, toISO: string): Promise<MenuEntry[]> {
  const rows = await query<MenuEntryRow>(
    `select me.id, me.menu_date, me.section_key, me.position,
            d.id as dish_id, d.name, d.price, d.allergens, d.additives
     from menu_entries me
     join dishes d on d.id = me.dish_id
     where me.menu_date between $1 and $2
     order by me.position, me.created_at`,
    [fromISO, toISO]
  );

  const dishIds = [...new Set(rows.map((r) => r.dish_id))];
  const translations = await loadTranslationsFor("dish_translations", dishIds);

  return rows.map((r) => ({
    id: r.id,
    menu_date: r.menu_date,
    section_key: r.section_key,
    position: r.position,
    dish: {
      id: r.dish_id,
      name: r.name,
      translations: translations.get(r.dish_id) ?? {},
      price: Number(r.price),
      allergens: r.allergens,
      additives: r.additives,
    },
  }));
}