import { SerializableClassInterface } from '../serializable/serializable.class.interface';
import { StreamJSONInterface } from './stream';
/**
 * A stream consists of an array of data like this for example
 * AltitudeStream: [100, 110, null, 112, 200, null, 300]
 * The sampling rate of streams is fixed to 1s
 * That means that on the above example the duration is seconds would be:
 * [1,2,3,4,5,6,6]
 *
 * null means no value and that means missing data.
 */
export interface StreamInterface extends SerializableClassInterface {
    /**
     * Type of the string. Can be any of the datatypes stored in the dataStore.
     * @todo make this an 'enum'
     */
    type: string;
    /**
     * Get's back the streams data as an array
     * @param onlyNumeric
     * @param filterInfinity
     */
    getData(onlyNumeric?: boolean, filterInfinity?: boolean): (number | null)[];
    /**
     * Sets the data for this stream
     * @param data
     */
    setData(data: (number | null)[]): this;
    /**
     * Returns an array of time as of duration in seconds for the current data
     * @param onlyNumeric
     * @param filterInfinity
     */
    getDurationOfData(onlyNumeric?: boolean, filterInfinity?: boolean): (number | null)[];
    /**
     * Gets the data based / offset on a startDate
     * @param startDate
     * @param onlyNumeric
     * @param filterInfinity
     */
    getStreamDataByTime(startDate: Date, onlyNumeric?: boolean, filterInfinity?: boolean): StreamDataItem[];
    /**
     * Gets the data offset on a time
     * @param offset
     * @param onlyNumeric
     * @param filterInfinity
     */
    getStreamDataByDuration(offset?: number, onlyNumeric?: boolean, filterInfinity?: boolean): StreamDataItem[];
    /**
     * Checks if the current stream is unit derived metric.
     * Eg speed is m/s if the current stream is speed in km/h this returns true
     */
    isUnitDerivedDataType(): boolean;
    toJSON(): StreamJSONInterface;
}
export interface StreamDataItem {
    /**
     * The time of the value
     * Can be time as of date or just time in ms
     */
    time: number;
    value: number | null;
}