import { ensureIdentity } from '@app/server/helpers';
import { IdentityContext } from '@app/server/identity';
import { prisma } from '@app/server/prisma/client';
import { Book, MutationBookUpdateArgs } from '@generated/types';
import { toBookSchema } from './mappers/bookMapper';

export async function BookUpdateResolver(
  _: any,
  { input }: MutationBookUpdateArgs,
  { req, res, identity }: IdentityContext
): Promise<Book> {
  ensureIdentity(identity);

  const model = await prisma.book.findUniqueOrThrow({
    where: { id: input.id }
  });

  if (identity.id !== model.authorId) throw new Error('Operation is not permitted.');

  if (input.title != null && input.title.length > 60) throw new Error('Title is too long.');
  if (input.description != null && input.description.length > 900)
    throw new Error('Description is too long.');

  const modelUpdated = await prisma.book.update({
    where: { id: input.id },
    data: {
      title: input.title != null ? input.title : undefined,
      description: input.description != null ? input.description : undefined,
      progressStatus: input.progressStatus != null ? input.progressStatus : undefined
    }
  });

  return toBookSchema(modelUpdated, { req, res, identity });
}