import { execute } from '../execution-utils';

it('passes variables to root fields', async () => {
  const query = `#graphql
    query GetProduct($upc: String!) {
      product(upc: $upc) {
        name
      }
    }
  `;

  const upc = '1';
  const { data, errors, queryPlan } = await execute({
    query,
    variables: { upc },
  });

  expect(errors).toBeUndefined();
  expect(data).toEqual({
    product: {
      name: 'Table',
    },
  });

  expect(queryPlan).toCallService('product');
});

it('supports default variables in a variable definition', async () => {
  const query = `#graphql
    query GetProduct($upc: String = "1") {
      product(upc: $upc) {
        name
      }
    }
  `;

  const { data, errors, queryPlan } = await execute({
    query,
  });

  expect(errors).toBeUndefined();
  expect(data).toEqual({
    product: {
      name: 'Table',
    },
  });

  expect(queryPlan).toCallService('product');
});

it('passes variables to nested services', async () => {
  const query = `#graphql
    query GetProductsForUser($format: Boolean) {
      me {
        reviews {
          body(format: $format)
        }
      }
    }
  `;

  const format = true;
  const { data, errors, queryPlan } = await execute({
    query,
    variables: { format },
  });

  expect(errors).toBeUndefined();
  expect(data).toEqual({
    me: {
      reviews: [
        { body: 'Love it!' },
        { body: 'Too expensive.' },
        {
          body: 'A classic.',
        },
      ],
    },
  });

  expect(queryPlan).toCallService('accounts');
  expect(queryPlan).toCallService('reviews');
});

it('works with default variables in the schema', async () => {
  const query = `#graphql
    query LibraryUser($libraryId: ID!, $userId: ID) {
      library(id: $libraryId) {
        userAccount(id: $userId) {
          id
          name {
            first
            last
          }
        }
      }
    }
  `;

  const { data, queryPlan, errors } = await execute({
    query,
    variables: { libraryId: '1' },
  });

  expect(data).toEqual({
    library: {
      userAccount: {
        id: '1',
        name: {
          first: 'Ada',
          last: 'Lovelace',
        }
      },
    },
  });

  expect(errors).toBeUndefined();
  expect(queryPlan).toCallService('books');
  expect(queryPlan).toCallService('accounts');
});