/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * 
 */
import isPromise from './jsutils/isPromise';
import { validateSchema } from './type/validate';
import { parse } from './language/parser';
import { validate } from './validation/validate';
import { execute } from './execution/execute';
export function graphql(argsOrSchema, source, rootValue, contextValue, variableValues, operationName, fieldResolver, typeResolver) {
  var _arguments = arguments;

  /* eslint-enable no-redeclare */
  // Always return a Promise for a consistent API.
  return new Promise(function (resolve) {
    return resolve( // Extract arguments from object args if provided.
    _arguments.length === 1 ? graphqlImpl(argsOrSchema.schema, argsOrSchema.source, argsOrSchema.rootValue, argsOrSchema.contextValue, argsOrSchema.variableValues, argsOrSchema.operationName, argsOrSchema.fieldResolver, argsOrSchema.typeResolver) : graphqlImpl(argsOrSchema, source, rootValue, contextValue, variableValues, operationName, fieldResolver, typeResolver));
  });
}
/**
 * The graphqlSync function also fulfills GraphQL operations by parsing,
 * validating, and executing a GraphQL document along side a GraphQL schema.
 * However, it guarantees to complete synchronously (or throw an error) assuming
 * that all field resolvers are also synchronous.
 */

export function graphqlSync(argsOrSchema, source, rootValue, contextValue, variableValues, operationName, fieldResolver, typeResolver) {
  /* eslint-enable no-redeclare */
  // Extract arguments from object args if provided.
  var result = arguments.length === 1 ? graphqlImpl(argsOrSchema.schema, argsOrSchema.source, argsOrSchema.rootValue, argsOrSchema.contextValue, argsOrSchema.variableValues, argsOrSchema.operationName, argsOrSchema.fieldResolver, argsOrSchema.typeResolver) : graphqlImpl(argsOrSchema, source, rootValue, contextValue, variableValues, operationName, fieldResolver, typeResolver); // Assert that the execution was synchronous.

  if (isPromise(result)) {
    throw new Error('GraphQL execution failed to complete synchronously.');
  }

  return result;
}

function graphqlImpl(schema, source, rootValue, contextValue, variableValues, operationName, fieldResolver, typeResolver) {
  // Validate Schema
  var schemaValidationErrors = validateSchema(schema);

  if (schemaValidationErrors.length > 0) {
    return {
      errors: schemaValidationErrors
    };
  } // Parse


  var document;

  try {
    document = parse(source);
  } catch (syntaxError) {
    return {
      errors: [syntaxError]
    };
  } // Validate


  var validationErrors = validate(schema, document);

  if (validationErrors.length > 0) {
    return {
      errors: validationErrors
    };
  } // Execute


  return execute(schema, document, rootValue, contextValue, variableValues, operationName, fieldResolver, typeResolver);
}