import type { DailyStats } from './stats-types';
export declare function resolveStatsDir(logDir: string): string;
export declare function resolveStatsFile(logDir: string, date: string): string;
export declare function isValidDate(date: string): boolean;
/** 合并两组每日统计，各数值字段取较大值 */
export declare function mergeDailyStats(a: DailyStats, b: DailyStats): DailyStats;
export declare function loadDailyStats(logDir: string, date: string): DailyStats | null;
export declare function loadDailyStatsAsync(logDir: string, date: string): Promise<DailyStats | null>;
/** 无条件保存，采用读-改-写：先读取文件已有数据，与内存数据合并后再写入 */
export declare function saveDailyStatsForce(logDir: string, stats: DailyStats): void;
/** 异步版本：避免在请求热路径或定时刷盘中阻塞事件循环 */
export declare function saveDailyStatsForceAsync(logDir: string, stats: DailyStats): Promise<void>;
export declare function saveDailyStats(logDir: string, stats: DailyStats, currentDailyStats: DailyStats, isDailyStatsDirty: () => boolean, setDailyStatsDirty: (dirty: boolean) => void): void;
export declare function saveDailyStatsAsync(logDir: string, stats: DailyStats, currentDailyStats: DailyStats, isDailyStatsDirty: () => boolean): Promise<void>;
export declare function listStatsDates(logDir: string): string[];
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