import type { PetStats } from './stats';
export interface TimeDecayConfig {
    hungerPerHour: number;
    happinessPerHour: number;
    cleanlinessPerHour: number;
    energyPerHour: number;
    healthDecayThreshold: {
        hunger: number;
        happiness: number;
        cleanliness: number;
    };
    healthPerHourWhenCritical: number;
}
export interface TimeSyncResult {
    hoursPassed: number;
    statChanges: Array<{
        stat: string;
        delta: number;
    }>;
    healthDecayTriggered: boolean;
    warnings: string[];
    newStats?: PetStats;
}
/**
 * Default decay configuration
 * Note: TimeDecay class uses lenient defaults that override these values.
 * See time-decay.ts for actual runtime values used.
 */
export declare const DEFAULT_DECAY_CONFIG: TimeDecayConfig;
export interface TimeAgoResult {
    value: number;
    unit: 'second' | 'minute' | 'hour' | 'day' | 'month';
    raw: string;
}
export declare const getTimeAgo: (date: Date | string) => TimeAgoResult;
export declare const formatDuration: (hours: number) => string;
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