export type LogLevel = 'debug' | 'info' | 'warn' | 'error';
export interface LogEntry {
    level: LogLevel;
    message: string;
    context?: any;
    timestamp: string;
    operation?: string;
}
export declare class HealthKitLogger {
    private static instance;
    private logs;
    private maxLogs;
    private constructor();
    static getInstance(): HealthKitLogger;
    debug(message: string, context?: any, operation?: string): void;
    info(message: string, context?: any, operation?: string): void;
    warn(message: string, context?: any, operation?: string): void;
    error(message: string, context?: any, operation?: string): void;
    private log;
    getLogs(level?: LogLevel): LogEntry[];
    getLogsByOperation(operation: string): LogEntry[];
    getRecentLogs(count?: number): LogEntry[];
    clearLogs(): void;
    getLogStats(): {
        total: number;
        byLevel: Record<LogLevel, number>;
    };
    logOperation(operation: string, message: string, context?: any): void;
    logError(operation: string, error: any, context?: any): void;
    logPerformance(operation: string, duration: number, context?: any): void;
}
export declare const logger: HealthKitLogger;
export declare function logDebug(message: string, context?: any, operation?: string): void;
export declare function logInfo(message: string, context?: any, operation?: string): void;
export declare function logWarn(message: string, context?: any, operation?: string): void;
export declare function logError(message: string, context?: any, operation?: string): void;