import { AxiosResponse, AxiosInstance } from 'axios';
import { Observable } from 'rxjs/Rx';
import { TemporalPage, TemporalPageLink, Data, NamedData, BatchedData } from './types';
export declare const enum TemporalPageData {
    EMPTY = 0,
    BUCKET = 1,
    STATS_UNIT = 2,
    STATS_BATCH = 3,
}
export declare class InternalUtils {
    static getDataType(link: TemporalPageLink): TemporalPageData;
    /**
     * Mapping function that takes a response and maps it to a *TemporalPage*.
     * @param response The response to map.
     * @param readUntil {number=} Until which timestamp we already read, so up untill (inclusive) that one, will be filtered out.
     * @throws Error when no link header is present.
     * @returns A *TemporalPage* object containing the **data** field and the **link** field.
     */
    static mapToTemporalPage(response: AxiosResponse, readUntil?: number): TemporalPage;
    /**
     * Parses the value of the link header, to make a *TemporalPageLink* object of the relevant information in there.
     * @param value The value of the link header to be parsed
     * @returns A *TemporalPageLink* object, containing at least a **self** link.
     */
    static parseLinkHeader(value: string): TemporalPageLink;
    /**
     * Perform a GET request to the url and map the result to a TemporalPage object.
     * @param url {string} The FULL url to GET query
     * @param axiosInstance {AxiosInstance} Custom axios instance to perform
     * requests with, else the defaul axios.create() is used.
     * @param readUntil {number=} Until which timestamp we already read, so up untill (inclusive) that one, will be filtered out.
     */
    static getAsTemporalPage(url: string, axiosInstance: AxiosInstance, readUntil?: number): Observable<TemporalPage>;
    /**
     * Recursively follows links to get the complete interval as specified in the url
     *
     * @param host {string} The actual host endpoint as given to a Client instance
     * @param url {string} Url containing a *from* and *to* parameter
     * @param axiosInstance {AxiosInstance=} Optional custom axios instance to perform
     * requests with, else the defaul axios.create() is used.
     */
    static getCompleteInterval(host: string, url: string, axiosInstance?: AxiosInstance): Observable<TemporalPage>;
    /**
     * Returns the last timestamp that has been returned in the TemporalPage or null if there was no data.
     */
    static getLastTimestamp(tpage: TemporalPage): number | null;
    /**
     *
     * @param b1
     * @param b2
     */
    static mergeStatsBatchedData(b1: BatchedData, b2: BatchedData): BatchedData;
    /**
     * Merges 2 stat Data object.
     * @param d1 Data 1
     * @param d2 Data 2
     * @return A new Data containing the merged results
     */
    static mergeStatsData(d1: Data, d2: Data): Data;
    /**
     * Merges two DataLayer Buckets.
     * @param b1 Bucket 1
     * @param b2 Bucket 2
     * @return A new DataLayer Bucket with merged data
     */
    static mergeDataLayerData(b1: NamedData, b2: NamedData): NamedData;
    /**
     * Merge one stats record with one other record (record == row from Data.values)
     * @param r1 Record 1
     * @param r2 Record 2
     * @return A new record with merged data
     */
    private static unifyStatsRecord(r1, r2);
    /**
     * Merge one DataLayer record with one other record (record == row from Data.values)
     * @param r1 Record 1
     * @param r2 Record 2
     * @return A new record with merged data
     */
    private static unifyDataLayerRecord(r1, r2);
    /**
     * The test that picks how to expand the initial result of a query.
     * @param tpage TemporalPage incoming object
     * @param last The Link header *last* field
     * @param axiosInstance {AxiosInstance=} Optional custom axios instance to perform
     * requests with, else the defaul axios.create() is used.
     */
    private static expandTest(tpage, host, last, axiosInstance?);
}
export declare function join(delim: string, ...parts: string[]): string;
export declare function url(...parts: string[]): string;