/**
 * Stats System
 *
 * Manages character statistics with support for:
 * - Setting/getting stat values
 * - Stat modifiers (buffs/debuffs)
 * - Min/max value clamping
 * - Stat calculations
 * - Event notifications
 */
import type { Stat, StatModifier, EventHandler } from './types';
/**
 * Stats system for managing character attributes
 */
export declare class StatsSystem {
    private stats;
    private eventHandlers;
    /**
     * Set a stat value
     */
    setStat(name: string, value: number, maxValue?: number, minValue?: number): void;
    /**
     * Get a stat value
     */
    getStat(name: string): number;
    /**
     * Get stat object
     */
    getStatObject(name: string): Stat | undefined;
    /**
     * Modify a stat by delta
     */
    modifyStat(name: string, delta: number): number;
    /**
     * Set base stat value (before modifiers)
     */
    setBaseStat(name: string, baseValue: number): void;
    /**
     * Add a stat modifier
     */
    addModifier(statName: string, modifier: Omit<StatModifier, 'id'>): string;
    /**
     * Remove a stat modifier
     */
    removeModifier(statName: string, modifierId: string): boolean;
    /**
     * Remove all modifiers from a stat
     */
    clearModifiers(statName: string): void;
    /**
     * Get all modifiers for a stat
     */
    getModifiers(statName: string): StatModifier[];
    /**
     * Update modifier durations (call each turn/tick)
     */
    updateDurations(): void;
    /**
     * Calculate final stat value with modifiers
     */
    private calculateStatValue;
    /**
     * Clamp value between min and max
     */
    private clampValue;
    /**
     * Check if stat exists
     */
    hasStat(name: string): boolean;
    /**
     * Get all stat names
     */
    getStatNames(): string[];
    /**
     * Get all stats
     */
    getAllStats(): Map<string, Stat>;
    /**
     * Remove a stat
     */
    removeStat(name: string): boolean;
    /**
     * Clear all stats
     */
    clear(): void;
    /**
     * Export stats state
     */
    export(): Record<string, Stat>;
    /**
     * Import stats state
     */
    import(stats: Record<string, Stat>): void;
    /**
     * Compare two stat values
     */
    compare(name: string, operator: '>' | '>=' | '<' | '<=' | '==' | '!=', value: number): boolean;
    /**
     * Register event handler
     */
    on(eventType: string, handler: EventHandler): void;
    /**
     * Unregister event handler
     */
    off(eventType: string, handler: EventHandler): void;
    /**
     * Emit event
     */
    private emit;
}
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