/**
 * Firebase Data Connect
 *
 * @packageDocumentation
 */
import { FirebaseApp } from '@firebase/app';
import { AppCheckInternalComponentName } from '@firebase/app-check-interop-types';
import { FirebaseAuthInternalName } from '@firebase/auth-interop-types';
import { Provider } from '@firebase/component';
import { LogLevelString } from '@firebase/logger';
import { FirebaseError } from '@firebase/util';


export declare interface CancellableOperation<T> extends PromiseLike<{
    data: T;
}> {
    cancel: () => void;
}
/**
 * Connect to the DataConnect Emulator
 * @param dc Data Connect instance
 * @param host host of emulator server
 * @param port port of emulator server
 * @param sslEnabled use https
 */
export declare function connectDataConnectEmulator(dc: DataConnect, host: string, port?: number, sslEnabled?: boolean): void;
/**
 * Connector Config for calling Data Connect backend.
 */
export declare interface ConnectorConfig {
    location: string;
    connector: string;
    service: string;
}
/**
 * Class representing Firebase Data Connect
 */
export declare class DataConnect {
    readonly app: FirebaseApp;
    private readonly dataConnectOptions;
    isEmulator: boolean;
    constructor(app: FirebaseApp, dataConnectOptions: DataConnectOptions, _authProvider: Provider<FirebaseAuthInternalName>, _appCheckProvider: Provider<AppCheckInternalComponentName>);
    getSettings(): ConnectorConfig;
    setInitialized(): void;
    enableEmulator(transportOptions: TransportOptions): void;
}
/**
 * DataConnectOptions including project id
 */
export declare interface DataConnectOptions extends ConnectorConfig {
    projectId: string;
}
export declare interface DataConnectResult<Data, Variables> extends OpResult<Data> {
    ref: OperationRef<Data, Variables>;
}
/**
 * Representation of user provided subscription options.
 */
export declare interface DataConnectSubscription<Data, Variables> {
    userCallback: OnResultSubscription<Data, Variables>;
    errCallback?: (e?: FirebaseError) => void;
    unsubscribe: () => void;
}
/* Excluded from this release type: DataConnectTransport */
export declare type DataSource = typeof SOURCE_CACHE | typeof SOURCE_SERVER;
/**
 * Execute Mutation
 * @param mutationRef mutation to execute
 * @returns `MutationRef`
 */
export declare function executeMutation<Data, Variables>(mutationRef: MutationRef<Data, Variables>): MutationPromise<Data, Variables>;
/**
 * Execute Query
 * @param queryRef query to execute.
 * @returns `QueryPromise`
 */
export declare function executeQuery<Data, Variables>(queryRef: QueryRef<Data, Variables>): QueryPromise<Data, Variables>;
/**
 * Initialize DataConnect instance
 * @param options ConnectorConfig
 */
export declare function getDataConnect(options: ConnectorConfig): DataConnect;
/**
 * Initialize DataConnect instance
 * @param app FirebaseApp to initialize to.
 * @param options ConnectorConfig
 */
export declare function getDataConnect(app: FirebaseApp, options: ConnectorConfig): DataConnect;
export declare const MUTATION_STR = "mutation";
/* Excluded from this release type: MutationManager */
/**
 * Mutation return value from `executeMutation`
 */
export declare interface MutationPromise<Data, Variables> extends PromiseLike<MutationResult<Data, Variables>> {
}
export declare interface MutationRef<Data, Variables> extends OperationRef<Data, Variables> {
    refType: typeof MUTATION_STR;
}
/**
 * Creates a `MutationRef`
 * @param dcInstance Data Connect instance
 * @param mutationName name of mutation
 */
export declare function mutationRef<Data>(dcInstance: DataConnect, mutationName: string): MutationRef<Data, undefined>;
/**
 *
 * @param dcInstance Data Connect instance
 * @param mutationName name of mutation
 * @param variables variables to send with mutation
 */
export declare function mutationRef<Data, Variables>(dcInstance: DataConnect, mutationName: string, variables: Variables): MutationRef<Data, Variables>;
/**
 * Mutation Result from `executeMutation`
 */
export declare interface MutationResult<Data, Variables> extends DataConnectResult<Data, Variables> {
    ref: MutationRef<Data, Variables>;
}
/**
 * `OnCompleteSubscription`
 */
export declare type OnCompleteSubscription = () => void;
/**
 * Signature for `OnErrorSubscription` for `subscribe`
 */
export declare type OnErrorSubscription = (err?: FirebaseError) => void;
/**
 * Signature for `OnResultSubscription` for `subscribe`
 */
export declare type OnResultSubscription<Data, Variables> = (res: QueryResult<Data, Variables>) => void;
export declare interface OperationRef<_Data, Variables> {
    name: string;
    variables: Variables;
    refType: ReferenceType;
    dataConnect: DataConnect;
}
export declare interface OpResult<Data> {
    data: Data;
    source: DataSource;
    fetchTime: string;
}
/* Excluded from this release type: parseOptions */
export declare const QUERY_STR = "query";
/**
 * Promise returned from `executeQuery`
 */
export declare interface QueryPromise<Data, Variables> extends PromiseLike<QueryResult<Data, Variables>> {
}
/**
 * QueryRef object
 */
export declare interface QueryRef<Data, Variables> extends OperationRef<Data, Variables> {
    refType: typeof QUERY_STR;
}
/**
 * Execute Query
 * @param dcInstance Data Connect instance to use.
 * @param queryName Query to execute
 * @returns `QueryRef`
 */
export declare function queryRef<Data>(dcInstance: DataConnect, queryName: string): QueryRef<Data, undefined>;
/**
 * Execute Query
 * @param dcInstance Data Connect instance to use.
 * @param queryName Query to execute
 * @param variables Variables to execute with
 * @returns `QueryRef`
 */
export declare function queryRef<Data, Variables>(dcInstance: DataConnect, queryName: string, variables: Variables): QueryRef<Data, Variables>;
/**
 * Result of `executeQuery`
 */
export declare interface QueryResult<Data, Variables> extends DataConnectResult<Data, Variables> {
    ref: QueryRef<Data, Variables>;
    toJSON: () => SerializedRef<Data, Variables>;
}
/**
 * Signature for unsubscribe from `subscribe`
 */
export declare type QueryUnsubscribe = () => void;
export declare type ReferenceType = typeof QUERY_STR | typeof MUTATION_STR;
/**
 * Serialized RefInfo as a result of `QueryResult.toJSON().refInfo`
 */
export declare interface RefInfo<Variables> {
    name: string;
    variables: Variables;
    connectorConfig: DataConnectOptions;
}
/**
 * Serialized Ref as a result of `QueryResult.toJSON()`
 */
export declare interface SerializedRef<Data, Variables> extends OpResult<Data> {
    refInfo: RefInfo<Variables>;
}
export declare function setLogLevel(logLevel: LogLevelString): void;
export declare const SOURCE_CACHE = "CACHE";
export declare const SOURCE_SERVER = "SERVER";
/**
 * Subscribe to a `QueryRef`
 * @param queryRefOrSerializedResult query ref or serialized result.
 * @param observer observer object to use for subscribing.
 * @returns `SubscriptionOptions`
 */
export declare function subscribe<Data, Variables>(queryRefOrSerializedResult: QueryRef<Data, Variables> | SerializedRef<Data, Variables>, observer: SubscriptionOptions<Data, Variables>): QueryUnsubscribe;
/**
 * Subscribe to a `QueryRef`
 * @param queryRefOrSerializedResult query ref or serialized result.
 * @param onNext Callback to call when result comes back.
 * @param onError Callback to call when error gets thrown.
 * @param onComplete Called when subscription completes.
 * @returns `SubscriptionOptions`
 */
export declare function subscribe<Data, Variables>(queryRefOrSerializedResult: QueryRef<Data, Variables> | SerializedRef<Data, Variables>, onNext: OnResultSubscription<Data, Variables>, onError?: OnErrorSubscription, onComplete?: OnCompleteSubscription): QueryUnsubscribe;
/**
 * Representation of full observer options in `subscribe`
 */
export declare interface SubscriptionOptions<Data, Variables> {
    onNext?: OnResultSubscription<Data, Variables>;
    onErr?: OnErrorSubscription;
    onComplete?: OnCompleteSubscription;
}
/**
 * Delete DataConnect instance
 * @param dataConnect DataConnect instance
 * @returns
 */
export declare function terminate(dataConnect: DataConnect): Promise<void>;
/**
 * Converts serialized ref to query ref
 * @param serializedRef ref to convert to `QueryRef`
 * @returns `QueryRef`
 */
export declare function toQueryRef<Data, Variables>(serializedRef: SerializedRef<Data, Variables>): QueryRef<Data, Variables>;
/* Excluded from this release type: TransportClass */
/**
 * Options to connect to emulator
 */
export declare interface TransportOptions {
    host: string;
    sslEnabled?: boolean;
    port?: number;
}
/* Excluded from this release type: validateArgs */
/* Excluded from this release type: validateDCOptions */
export {};