import { Subject, Subscriber, BehaviorSubject } from 'rxjs';
import { InjectionToken } from '@angular/core';
import { HttpRequest, HttpErrorResponse, HttpEvent, HttpResponse } from '@angular/common/http';
import { RequestSender } from './request-sender';
/**
 * Type of API Error
 */
export declare enum ApiErrorEventType {
    ConnectionError = 101,
    WrongArgumentSyntax = 400,
    Unauthorized = 401,
    Forbidden = 403,
    NotFound = 404,
    ServerError = 500,
    UnknownError = 1001
}
/**
 * Type of validation error
 */
export declare enum ValidationType {
    RequestValidation = "request",
    ResponseValidation = "response",
    ParamsValidation = "params"
}
/**
 * Данные глобального события API.
 */
export interface ApiErrorEventData {
    originalEvent: HttpErrorResponse;
    /**
     * Number of attempts. By default set as 10 and counts down every
     * new failed attempt.
     */
    remainAttemptsNumber: number;
    request: HttpRequest<any>;
    /**
     * Отправитель запроса.
     */
    sender: RequestSender;
    /**
     * Subscriber of request at business layer of app
     */
    subscriber: Subscriber<HttpResponse<any>>;
    /**
     * Channel for additional events, such as progress.
     */
    statusChanges: Subject<HttpEvent<any>> | boolean;
    type: ApiErrorEventType;
    /**
     * @see VIRTUAL_CONNECTION_STATUS
     */
    virtualConnectionStatus: BehaviorSubject<boolean>;
}
/**
 * Событие, сообщающее об ошибках валидации.
 */
export declare class ValidationError {
    message: string;
    /**
     *  Тип ошибки
     */
    type: ValidationType;
    /**
     * Отправитель запроса.
     * todo нужно связать с ApiService. для этого надо вынести это в интерфейс
     */
    sender: any;
    /**
     * Схема, с помощью которой производилась валидация.
     */
    schema: any;
    /**
     * Значение, которое не прошло валидацию.
     */
    value: any;
    /**
     * Сообщения об ошибках валидации.
     */
    errorMessages: string[] | any[];
    constructor(message: string, 
    /**
     *  Тип ошибки
     */
    type: ValidationType, 
    /**
     * Отправитель запроса.
     * todo нужно связать с ApiService. для этого надо вынести это в интерфейс
     */
    sender: any, 
    /**
     * Схема, с помощью которой производилась валидация.
     */
    schema: any, 
    /**
     * Значение, которое не прошло валидацию.
     */
    value: any, 
    /**
     * Сообщения об ошибках валидации.
     */
    errorMessages: string[] | any[]);
}
/**
 * The primary use of {@link ApiErrorHandler} is a handling
 * validation errors and http errors after validation of response.
 * For instance, error response with status 500 have to be validated
 * before, and throws {@link ValidationError} error when validation fails.
 */
export interface ApiErrorHandler {
    /**
     * Handles HTTP-error after validation of response check.
     * @param errorData
     */
    onHttpError(errorData: ApiErrorEventData): void;
    /**
     * When returns `false`, error skips.
     * @param errorData
     */
    onValidationError(errorData: ValidationError): boolean | void;
}
export declare const resetApiSubscribers: Subject<any>;
/**
 * @see VIRTUAL_CONNECTION_STATUS
 */
export declare const virtualConnectionStatus: BehaviorSubject<boolean>;
/**
 * Dependency of {@link ApiService}. Notifies service about need of a cancelation of
 * all active request subscribers.
 */
export declare const RESET_API_SUBSCRIBERS: InjectionToken<Subject<void>>;
/**
 * Injection token for {@link ApiErrorHandler}.
 * Used in {@link ApiService}.
 */
export declare const API_ERROR_HANDLER: InjectionToken<ApiErrorHandler>;
/**
 * Tool than facilitate manual managing of a virtual connection status.
 * Virtual connection status might be manually changed to `false` (connection off),
 * and further requests will be wait for `true`.
 */
export declare const VIRTUAL_CONNECTION_STATUS: InjectionToken<ApiErrorHandler>;
/**
 * Dependency of {@link ApiService}. Disable validation (JSON-Schema) of
 * request, params and response, when provided `true`.
 */
export declare const DISABLE_VALIDATION: InjectionToken<boolean>;
export declare const ERROR_EVENTS_PROVIDER: {
    provide: InjectionToken<Subject<void>>;
    useValue: Subject<any>;
}[];