import { EventInterface } from '../event.interface';
export declare class EventUtilities {
    static mergeEvents(events: EventInterface[]): EventInterface;
    static generateStatsForAll(event: EventInterface): void;
    /**
     * Regenerates event-level stats from the current in-memory event state.
     *
     * Important behavior:
     * - Clears ONLY event stats (`event.clearStats()`).
     * - Does NOT clear activity stats.
     * - Does NOT read the original imported file (FIT/TCX/GPX/etc.); raw source payload is not retained.
     *
     * Regeneration model:
     * - Single-activity event: copies current activity stats into the event.
     * - Multi-activity event: recomputes event summary stats from activity stats and aggregates power curves.
     *
     * Interaction with `generateStatsForAll(event)`:
     * - `generateStatsForAll` calls activity generation first (`generateMissingStreamsAndStatsForActivity`),
     *   then calls this method.
     * - Activity generation is "fill missing", not "replace existing": existing activity stats are preserved.
     * - If activity stats were cleared or removed by caller code before regeneration, missing stats are recomputed
     *   from streams (for example, Average Speed from speed stream mean, Ascent from altitude gain).
     *
     * Distance behavior:
     * - Event distance is rebuilt from activities during event summarization.
     * - Activity distance is recomputed only when missing or equal to zero (in activity generation path).
     */
    static reGenerateStatsForEvent(event: EventInterface): void;
    private static aggregatePowerCurves;
}