declare type Timestamp = number;
export declare type Duration = number | `${number}${"s" | "m" | "h" | "d" | "w" | "M" | "y"}`;
declare type DataSourceType_ = "GAUGE" | "COUNTER" | "DCOUNTER" | "DERIVE" | "DDERIVE" | "ABSOLUTE";
export declare type DataSourceType = DataSourceType_ | "COMPUTE";
declare type DataSource_<N extends string = any> = `DS:${N}:${DataSourceType_}:${Duration}:${number}:${number}`;
declare type DataSourceCompute<N extends string = any> = `DS:${N}:COMPUTE:${string}`;
/**
 * https://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html
 *
 * Data sources:
 *  - `"DS:ds-name:{GAUGE | COUNTER | DERIVE | DCOUNTER | DDERIVE | ABSOLUTE}:heartbeat:min:max"`
 *  - `"DS:ds-name:COMPUTE:rpn-expression"`
 *
 * Variable types:
 *  - `ds-name`: string
 *  - `heartbeat`: number (seconds)
 *  - `min`: number (data range)
 *  - `max`: number (data range)
 *  - `rpn-expression`: string
 */
export declare type DataSource<N extends string = any> = DataSource_<N> | DataSourceCompute<N>;
export declare type ConsolidationFunction = "AVERAGE" | "MIN" | "MAX" | "LAST";
declare type RoundRobinArchive_ = `RRA:${ConsolidationFunction}:${number}:${Duration}:${Duration}`;
declare type RoundRobinArchiveHWPredict = `RRA:${"HWPREDICT" | "MHWPREDICT"}:${Duration}:${number}:${number}:${Duration}${"" | `:${number}`}`;
declare type RoundRobinArchiveSeasonal = `RRA:${"SEASONAL" | "DEVSEASONAL"}:${Duration}:${number}:${number}${"" | `:${number}`}`;
declare type RoundRobinArchiveDevPredict = `RRA:DEVPREDICT:${Duration}:${number}`;
declare type RoundRobinArchiveFailures = `RRA:FAILURES:${Duration}:${number}:${number}:${number}`;
/**
 * https://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html
 *
 * Round robin archives:
 *  - `"RRA:{AVERAGE | MIN | MAX | LAST}:xff:steps:rows"`
 *  - `"RRA:HWPREDICT:rows:alpha:beta:seasonal period[:rra-num]"`
 *  - `"RRA:MHWPREDICT:rows:alpha:beta:seasonal period[:rra-num]"`
 *  - `"RRA:SEASONAL:seasonal period:gamma:rra-num[:smoothing-window]"`
 *  - `"RRA:DEVSEASONAL:seasonal period:gamma:rra-num[:smoothing-window]"`
 *  - `"RRA:DEVPREDICT:rows:rra-num"`
 *  - `"RRA:FAILURES:rows:threshold:window length:rra-num"`
 *
 * Variable types:
 *  - `xff`: number (between 0 and 1)
 *  - `steps`: number
 *  - `rows`: number
 *  - `alpha`: number (between 0 and 1)
 *  - `beta`: number (between 0 and 1)
 *  - `gamma`: number (between 0 and 1)
 *  - `seasonal period`: number
 *  - `rra-num`: number (1-based RRA index)
 *  - `smoothing-window`: number (between 0 and 1)
 */
export declare type RoundRobinArchive = RoundRobinArchive_ | RoundRobinArchiveHWPredict | RoundRobinArchiveSeasonal | RoundRobinArchiveDevPredict | RoundRobinArchiveFailures;
export declare type RrdtoolDefinition<D extends RrdtoolData = any> = DataSource<keyof D & string> | RoundRobinArchive;
export interface RrdtoolData {
    [key: string]: number;
}
export interface RrdtoolDatapoint<D extends RrdtoolData = any> {
    ts: Timestamp;
    values: Partial<D>;
}
export interface RrdtoolInfo<N extends string = any> {
    filname: string;
    rrd_version: string;
    step: number;
    last_update: Timestamp;
    header_size: number;
    ds: {
        name: N;
        type: DataSourceType;
        minimal_heartbeat: number;
        min?: number;
        max?: number;
        last_ds: string;
        value: number;
        unknown_sec: number;
    }[];
    rra: {
        cf: ConsolidationFunction;
        cdp_prep: {
            value?: number;
            unknown_datapoints: number;
        }[];
    }[];
}
export interface RrdToolCreateOptions {
    start?: Timestamp;
    step?: Duration;
    overwrite?: boolean;
    templateFile?: string;
    sourceFile?: string;
}
export interface RrdToolUpdateOptions {
    timestamp?: Timestamp;
    verbose?: boolean;
    skipPastUpdates?: boolean;
}
export interface RrdToolFetchOptions {
    start?: Timestamp;
    end?: Timestamp;
    resolution?: Duration;
    alignStart?: boolean;
}
export {};