export interface LoggerOptions {
    /** Enable console logging (default: true) */
    console?: boolean;
    /** Enable file logging (default: false) */
    file?: boolean;
    /** File path for logs (default: './logs/app.log') */
    filePath?: string;
    /** Minimum log level (default: 'info') */
    level?: LogLevel;
    /** Custom format for log messages */
    format?: string;
    /** Paths to skip from logging */
    skip?: string[];
    /** Include IP address in logs (default: false) */
    includeIp?: boolean;
    /** When true, middleware uses the global logger instead of creating a dedicated HTTP logger */
    useGlobal?: boolean;
    /**
     * Custom IP headers to check in priority order.
     * Useful for proxies like Cloudflare (cf-connecting-ip), nginx, etc.
     * Default: ['x-forwarded-for', 'x-real-ip', 'x-client-ip']
     */
    ipHeaders?: string[];
}
export type LogLevel = "debug" | "info" | "warn" | "error";
export interface LogEntry {
    /** Timestamp of the log entry */
    timestamp: Date;
    /** Log level */
    level: LogLevel;
    /** HTTP method or custom identifier */
    method: string;
    /** Request path or log context */
    path: string;
    /** HTTP status code */
    statusCode: number;
    /** Request duration in milliseconds */
    duration: number;
    /** Optional message */
    message?: string;
    /** IP address if available and enabled */
    ip?: string;
    /** Internal flag to differentiate HTTP logs (not exposed) */
    isHttp?: boolean;
}
export interface ILogger {
    /** Log a debug message */
    debug(input: string | Partial<LogEntry>): void;
    /** Log an info message */
    info(input: string | Partial<LogEntry>): void;
    /** Log a warning message */
    warn(input: string | Partial<LogEntry>): void;
    /** Log an error message */
    error(input: string | Partial<LogEntry>): void;
    /** Log a message with a specific level */
    log(level: LogLevel, input: string | Partial<LogEntry>): void;
}