import type { MeterValueDto } from '../interfaces/dto/meter.value.dto.js';
export declare class MeterValueUtils {
    private static readonly validContexts;
    /**
     * Calculate the total Kwh
     *
     * @param {array} meterValues - meterValues of a transaction.
     * @param {number} currentTotal - the current total Kwh to add to interval values, if needed.
     * @param {number} meterStart - the starting Kwh value at the beginning of the transaction, if available.
     * @return {number} total Kwh based on the best available energy measurement.
     */
    static getTotalKwh(meterValues: MeterValueDto[], currentTotal: number, meterStart?: number): number;
    static getMeterStart(meterValues: MeterValueDto[]): number | null;
    /**
     * Filter out meter values whose context is not one of the valid reading contexts.
     * @param meterValues Array of MeterValueType to filter.
     * @returns Filtered array containing only meter values in Transaction_Begin, Sample_Periodic or Transaction_End contexts.
     */
    private static filterValidMeterValues;
    /**
     * Extracts Energy.Active.Import.Register measurand values into a timestamp-to-kWh map.
     * @param meterValues Array of MeterValueType to search for register readings.
     * @returns Map where each key is the reading timestamp (ms since epoch) and each value is the normalized kWh.
     */
    private static getRegisterValuesMap;
    /**
     * Extracts Energy.Active.Import.Interval measurand values into a timestamp-to-kWh map.
     * @param meterValues Array of MeterValueType to search for interval readings.
     * @returns Map where each key is the reading timestamp (ms since epoch) and each value is the normalized kWh.
     */
    private static getIntervalValuesMap;
    /**
     * Extracts Energy.Active.Net measurand values into a timestamp-to-kWh map.
     * @param meterValues Array of MeterValueType to search for net readings.
     * @returns Map where each key is the reading timestamp (ms since epoch) and each value is the normalized kWh.
     */
    private static getNetValuesMap;
    /**
     * Find a specific measurand value from sampledValues
     * @param sampledValues Array of sampled values
     * @param measurand The measurand type to look for
     * @param phased Whether to look for phased values (true) or non-phased values (false)
     * @returns The normalized value in kWh, or null if not found
     */
    private static findMeasurandValue;
    /**
     * Sum phased values for a specific measurand
     * @param sampledValues Array of sampled values
     * @param measurand The measurand type to sum
     * @returns The sum of phase values in kWh, or null if no valid phase values found
     */
    private static sumPhasedValues;
    /**
     * Convert a sampled value to kWh, applying unit multipliers.
     * @param value A SampledValueType entry.
     * @returns The converted value in kWh, or null if unit is missing.
     */
    private static normalizeToKwh;
    /**
     * Sort the entries of a timestamp-to-kWh map ascending by timestamp and return the kWh values.
     * @param valuesMap Map of timestamp (ms since epoch) to kWh.
     * @returns Array of kWh values sorted by timestamp.
     */
    private static getSortedKwhByTimestampAscending;
}