import type { LogLevel } from '../value-objects/LogLevel';
/**
 * Main logger interface
 * Follows Interface Segregation Principle
 */
export interface ILogger {
    debug(message: string, context?: Record<string, unknown>): void;
    info(message: string, context?: Record<string, unknown>): void;
    warn(message: string, context?: Record<string, unknown>): void;
    error(message: string, context?: Record<string, unknown>): void;
    fatal(message: string, context?: Record<string, unknown>): void;
    log(level: LogLevel, message: string, context?: Record<string, unknown>): void;
    trackEvent(eventName: string, properties?: Record<string, unknown>): void;
    withContext<T>(context: Record<string, unknown>, fn: () => T): T;
    withContextAsync<T>(context: Record<string, unknown>, fn: () => Promise<T>): Promise<T>;
    flush(): Promise<void>;
    getMetrics(): LoggerMetrics;
    getHealth(): HealthStatus;
    destroy(): Promise<void>;
}
export interface LoggerMetrics {
    readonly logsProcessed: number;
    readonly logsDropped: number;
    readonly logsSanitized: number;
    readonly flushCount: number;
    readonly errorCount: number;
    readonly bufferSize: number;
    readonly avgFlushTime: number;
    readonly lastFlushTime: number;
    readonly memoryUsage: number;
    readonly cpuUsage: number;
    readonly circuitBreakerTrips: number;
    readonly droppedByBackpressure: number;
    readonly droppedByDlq: number;
    readonly pendingFlushBatches: number;
    readonly inFlightFlushes: number;
    readonly latency?: {
        readonly p50: number;
        readonly p95: number;
        readonly p99: number;
        readonly avg: number;
    };
    readonly compression?: {
        readonly avgRatio: number;
        readonly avgTime: number;
        readonly totalSavedBytes: number;
    };
    readonly throughput?: number;
}
export interface HealthStatus {
    readonly healthy: boolean;
    readonly lastSuccessfulFlush: number;
    readonly consecutiveErrors: number;
    readonly bufferUtilization: number;
    uptime: number;
    memoryUsageMB: number;
    circuitBreakerState: 'closed' | 'open' | 'half-open';
    lastError?: string;
}
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