'use server';

import { revalidatePath } from 'next/cache';
import { unstable_rethrow } from 'next/navigation';
import { verifySession } from '@/lib/auth/dal';
import { BackendRequestError } from '@/lib/http/backend-fetch';
import { createMerchant, updateMerchant } 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'),
    bankHolderName: readString(formData, 'bankHolderName'),
    bankCode: readString(formData, 'bankCode'),
    accountNumber: readString(formData, 'accountNumber'),
    businessStatusCode: readString(formData, 'businessStatusCode'),
    divisionCode: readString(formData, 'divisionCode'),
    isVisible: readString(formData, 'isVisible') === 'Y',
  });
  if (!validation.ok) {
    return { status: 'error', errors: validation.errors };
  }

  try {
    if (validation.values.id) {
      await updateMerchant(validation.values.id, validation.values);
    } else {
      await createMerchant(validation.values);
    }
  } catch (error) {
    unstable_rethrow(error);
    console.error('[merchants] 저장 실패', error);
    const message =
      error instanceof BackendRequestError && error.message ? error.message : SAVE_FAILED_MESSAGE;
    return { status: 'error', message };
  }

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