/**
 *  Copyright (c) 2021 GraphQL Contributors
 *  All rights reserved.
 *
 *  This source code is licensed under the license found in the
 *  LICENSE file in the root directory of this source tree.
 *
 *  @flow
 */

import type {
  Outline,
  Diagnostic,
  ContextToken,
  ContextTokenUnion,
  IPosition,
  DefinitionQueryResult,
  Uri,
  GraphQLCache,
  CompletionItem,
  CompletionItemBase,
  TypeInfo,
  State,
} from 'graphql-language-service-types';
import type { ValidationRule, GraphQLSchema } from 'graphql';
import type { Hover } from 'vscode-languageserver-types';
import { GraphQLDirective } from "graphql";
import type { FragmentDefinitionNode } from "graphql";

declare export function getOutline(queryText: string): ?Outline;
declare export function getDiagnostics(
  query: string,
  schema: ?GraphQLSchema,
  customRules?: Array<ValidationRule>,
  isRelayCompatMode?: boolean,
  externalFragments?: Array<FragmentDefinitionNode> | string
): Array<Diagnostic>;

declare export function getAutocompleteSuggestions(
  schema: GraphQLSchema,
  queryText: string,
  cursor: IPosition,
  contextToken?: ContextToken,
  externalFragments?: Array<FragmentDefinitionNode>
): Array<CompletionItem>;

declare export class GraphQLLanguageService {
  constructor(cache: GraphQLCache): GraphQLLanguageService;

  getDefinition(
    query: string,
    position: IPosition,
    filePath: Uri,
  ): Promise<?DefinitionQueryResult>;

  getDiagnostics(
    query: string,
    uri: Uri,
    isRelayCompatMode?: boolean,
  ): Promise<Array<Diagnostic>>;

  getHoverInformation(
    query: string,
    position: IPosition,
    filePath: Uri,
  ): Promise<Hover.contents>;

  getAutocompleteSuggestions(
    query: string,
    position: IPosition,
    filePath: Uri,
  ): Promise<Array<CompletionItem>>;
}
declare export function canUseDirective(
  state: $PropertyType<State, "prevState">,
  directive: GraphQLDirective
): boolean;
declare export function getDefinitionState(
  tokenState: State
): State | null | void;
declare export function getFragmentDefinitions(
  queryText: string
): Array<FragmentDefinitionNode>;
declare export function getTypeInfo(
  schema: GraphQLSchema,
  tokenState: State
): TypeInfo;
declare export function hintList<T: CompletionItemBase>(
  token: ContextTokenUnion,
  list: Array<T>
): Array<T>;
declare export function objectValues(object: {
  [key: string]: any,
}): Array<any>;