import { DocumentNode, ExecutionResult } from 'graphql';
import { FetchResult } from 'apollo-link';
import { DataProxy } from 'apollo-cache';
import { MutationQueryReducersMap } from './types';
import { PureQueryOptions, OperationVariables } from './types';
/**
 * fetchPolicy determines where the client may return a result from. The options are:
 * - cache-first (default): return result from cache. Only fetch from network if cached result is not available.
 * - cache-and-network: return result from cache first (if it exists), then return network result once it's available.
 * - cache-only: return result from cache if available, fail otherwise.
 * - no-cache: return result from network, fail if network call doesn't succeed, don't save to cache
 * - network-only: return result from network, fail if network call doesn't succeed, save to cache
 * - standby: only for queries that aren't actively watched, but should be available for refetch and updateQueries.
 */
export declare type FetchPolicy = 'cache-first' | 'cache-and-network' | 'network-only' | 'cache-only' | 'no-cache' | 'standby';
/**
 * errorPolicy determines the level of events for errors in the execution result. The options are:
 * - none (default): any errors from the request are treated like runtime errors and the observable is stopped (XXX this is default to lower breaking changes going from AC 1.0 => 2.0)
 * - ignore: errors from the request do not stop the observable, but also don't call `next`
 * - all: errors are treated like data and will notify observables
 */
export declare type ErrorPolicy = 'none' | 'ignore' | 'all';
/**
 * Common options shared across all query interfaces.
 */
export interface QueryBaseOptions<TVariables = OperationVariables> {
    /**
     * A map going from variable name to variable value, where the variables are used
     * within the GraphQL query.
     */
    variables?: TVariables;
    /**
     * Specifies the {@link FetchPolicy} to be used for this query
     */
    fetchPolicy?: FetchPolicy;
    /**
     * Specifies the {@link ErrorPolicy} to be used for this query
     */
    errorPolicy?: ErrorPolicy;
    /**
     * Whether or not to fetch results
     */
    fetchResults?: boolean;
}
/**
 * Query options.
 */
export interface QueryOptions<TVariables = OperationVariables> extends QueryBaseOptions<TVariables> {
    /**
     * A GraphQL document that consists of a single query to be sent down to the
     * server.
     */
    query: DocumentNode;
    /**
     * Arbitrary metadata stored in the store with this query.  Designed for debugging,
     * developer tools, etc.
     */
    metadata?: any;
    /**
     * Context to be passed to link execution chain
     */
    context?: any;
}
/**
 * We can change these options to an ObservableQuery
 */
export interface ModifiableWatchQueryOptions<TVariables = OperationVariables> extends QueryBaseOptions<TVariables> {
    /**
     * The time interval (in milliseconds) on which this query should be
     * refetched from the server.
     */
    pollInterval?: number;
    /**
     * Whether or not updates to the network status should trigger next on the observer of this query
     */
    notifyOnNetworkStatusChange?: boolean;
}
/**
 * Watched query options.
 */
export interface WatchQueryOptions<TVariables = OperationVariables> extends QueryOptions<TVariables>, ModifiableWatchQueryOptions<TVariables> {
}
export interface FetchMoreQueryOptions<TVariables, K extends keyof TVariables> {
    query?: DocumentNode;
    variables?: Pick<TVariables, K>;
}
export declare type UpdateQueryFn<TData = any, TVariables = OperationVariables> = (previousQueryResult: TData, options: {
    subscriptionData: {
        data: TData;
    };
    variables?: TVariables;
}) => TData;
export declare type SubscribeToMoreOptions<TData = any, TVariables = OperationVariables> = {
    document: DocumentNode;
    variables?: TVariables;
    updateQuery?: UpdateQueryFn<TData, TVariables>;
    onError?: (error: Error) => void;
};
export interface SubscriptionOptions<TVariables = OperationVariables> {
    /**
     * A GraphQL document, often created with `gql` from the `graphql-tag`
     * package, that contains a single subscription inside of it.
     */
    query: DocumentNode;
    /**
     * An object that maps from the name of a variable as used in the subscription
     * GraphQL document to that variable's value.
     */
    variables?: TVariables;
}
export declare type RefetchQueryDescription = Array<string | PureQueryOptions>;
export interface MutationBaseOptions<T = {
    [key: string]: any;
}, TVariables = OperationVariables> {
    /**
     * An object that represents the result of this mutation that will be
     * optimistically stored before the server has actually returned a result.
     * This is most often used for optimistic UI, where we want to be able to see
     * the result of a mutation immediately, and update the UI later if any errors
     * appear.
     */
    optimisticResponse?: Object | Function;
    /**
     * A {@link MutationQueryReducersMap}, which is map from query names to
     * mutation query reducers. Briefly, this map defines how to incorporate the
     * results of the mutation into the results of queries that are currently
     * being watched by your application.
     */
    updateQueries?: MutationQueryReducersMap<T>;
    /**
     * A list of query names which will be refetched once this mutation has
     * returned. This is often used if you have a set of queries which may be
     * affected by a mutation and will have to update. Rather than writing a
     * mutation query reducer (i.e. `updateQueries`) for this, you can simply
     * refetch the queries that will be affected and achieve a consistent store
     * once these queries return.
     */
    refetchQueries?: ((result: ExecutionResult) => RefetchQueryDescription) | RefetchQueryDescription;
    /**
     * By default, `refetchQueries` does not wait for the refetched queries to
     * be completed, before resolving the mutation `Promise`. This ensures that
     * query refetching does not hold up mutation response handling (query
     * refetching is handled asynchronously). Set `awaitRefetchQueries` to
     * `true` if you would like to wait for the refetched queries to complete,
     * before the mutation can be marked as resolved.
     */
    awaitRefetchQueries?: boolean;
    /**
     * A function which provides a {@link DataProxy} and the result of the
     * mutation to allow the user to update the store based on the results of the
     * mutation.
     *
     * This function will be called twice over the lifecycle of a mutation. Once
     * at the very beginning if an `optimisticResponse` was provided. The writes
     * created from the optimistic data will be rolled back before the second time
     * this function is called which is when the mutation has succesfully
     * resolved. At that point `update` will be called with the *actual* mutation
     * result and those writes will not be rolled back.
     *
     * The reason a {@link DataProxy} is provided instead of the user calling the
     * methods directly on {@link ApolloClient} is that all of the writes are
     * batched together at the end of the update, and it allows for writes
     * generated by optimistic data to be rolled back.
     */
    update?: MutationUpdaterFn<T>;
    /**
     * Specifies the {@link ErrorPolicy} to be used for this operation
     */
    errorPolicy?: ErrorPolicy;
    /**
     * An object that maps from the name of a variable as used in the mutation
     * GraphQL document to that variable's value.
     */
    variables?: TVariables;
}
export interface MutationOptions<T = {
    [key: string]: any;
}, TVariables = OperationVariables> extends MutationBaseOptions<T, TVariables> {
    /**
     * A GraphQL document, often created with `gql` from the `graphql-tag`
     * package, that contains a single mutation inside of it.
     */
    mutation: DocumentNode;
    /**
     * The context to be passed to the link execution chain. This context will
     * only be used with the mutation. It will not be used with
     * `refetchQueries`. Refetched queries use the context they were
     * initialized with (since the intitial context is stored as part of the
     * `ObservableQuery` instance). If a specific context is needed when
     * refetching queries, make sure it is configured (via the
     * [`query` `context` option](/docs/react/api/apollo-client.html#ApolloClient.query))
     * when the query is first initialized/run.
     */
    context?: any;
    /**
     * Specifies the {@link FetchPolicy} to be used for this query
     */
    fetchPolicy?: FetchPolicy;
}
export declare type MutationUpdaterFn<T = {
    [key: string]: any;
}> = (proxy: DataProxy, mutationResult: FetchResult<T>) => void;