'use server';

import { unstable_rethrow } from 'next/navigation';
import { revalidatePath } from 'next/cache';
import { verifySession } from '@/lib/auth/dal';
import { createMerchant } from '@/lib/data/repositories/merchant-repository';
import {
  validateMerchant,
  type MerchantFormState,
} from '@/lib/domain/merchant-form';
import { MERCHANTS_PATH } from '@/lib/domain/merchant-query';

const SAVE_FAILED_MESSAGE = '저장하지 못했습니다. 잠시 후 다시 시도해 주세요.';

function readString(formData: FormData, key: string): string {
  const value = formData.get(key);
  return typeof value === 'string' ? value : '';
}

export async function saveMerchantAction(
  _prevState: MerchantFormState,
  formData: FormData
): Promise<MerchantFormState> {
  await verifySession();

  const validation = validateMerchant({
    id: readString(formData, 'id'),
    brandName: readString(formData, 'brandName'),
    memo: readString(formData, 'memo'),
    name: readString(formData, 'name'),
    categoryCode: readString(formData, 'categoryCode'),
    businessNumber: readString(formData, 'businessNumber'),
    ownerName: readString(formData, 'ownerName'),
    phoneNumber: readString(formData, 'phoneNumber'),
    address: readString(formData, 'address'),
    addressDetail: readString(formData, 'addressDetail'),
    postalCode: readString(formData, 'postalCode'),
    latitude: readString(formData, 'latitude'),
    longitude: readString(formData, 'longitude'),
    isVisible: readString(formData, 'isVisible') === 'Y',
  });
  if (!validation.ok) {
    return { status: 'error', errors: validation.errors };
  }

  // TODO(백엔드): 수정 API가 없다(`/api/v1/mngr/voc`는 목록·등록 둘뿐). 생기면 여기서 가른다.
  try {
    await createMerchant(validation.values);
  } catch (error) {
    // 이슈: 세션이 밀렸을 때 backendFetch가 던지는 redirect를 이 catch가 삼키면 안 된다.
    unstable_rethrow(error);
    return { status: 'error', message: SAVE_FAILED_MESSAGE };
  }

  revalidatePath(MERCHANTS_PATH);
  return { status: 'success' };
}