import type { RequestHandler } from './$types';
import { json, error } from '@sveltejs/kit';
import { z } from 'zod';
import { getDb } from '$lib/server/db';
import {
  addToWishlist,
  listWishlist,
  type SortKey
} from '$lib/server/wishlist/repository';

const AddSchema = z.object({
  recipe_id: z.number().int().positive(),
  profile_id: z.number().int().positive()
});

const VALID_SORTS: readonly SortKey[] = ['popular', 'newest', 'oldest'] as const;

function parseSort(raw: string | null): SortKey {
  return VALID_SORTS.includes(raw as SortKey) ? (raw as SortKey) : 'popular';
}

function parseProfileId(raw: string | null): number | null {
  if (!raw) return null;
  const n = Number(raw);
  return Number.isInteger(n) && n > 0 ? n : null;
}

export const GET: RequestHandler = async ({ url }) => {
  const sort = parseSort(url.searchParams.get('sort'));
  const profileId = parseProfileId(url.searchParams.get('profile_id'));
  return json({ sort, entries: listWishlist(getDb(), profileId, sort) });
};

export const POST: RequestHandler = async ({ request }) => {
  const body = await request.json().catch(() => null);
  const parsed = AddSchema.safeParse(body);
  if (!parsed.success) error(400, { message: 'recipe_id and profile_id required' });
  addToWishlist(getDb(), parsed.data.recipe_id, parsed.data.profile_id);
  return json({ ok: true }, { status: 201 });
};