export declare enum LogLevel {
    ERROR = 0,
    WARN = 1,
    LOG = 2,
    DEBUG = 3
}
export interface LoggerService {
    log(message: string, context?: string): void;
    error(message: string, trace?: string, context?: string): void;
    warn(message: string, context?: string): void;
    debug?(message: string, context?: string): void;
}
export interface LoggerConfig {
    level?: LogLevel;
    json?: boolean;
    appName?: string;
}
export declare class ConsoleLogger implements LoggerService {
    private level;
    private json;
    private appName;
    private lastTimestamp;
    constructor(config?: LoggerConfig);
    log(message: string, context?: string): void;
    error(message: string, trace?: string, context?: string): void;
    warn(message: string, context?: string): void;
    debug(message: string, context?: string): void;
    private printError;
    private print;
    private printJson;
}
export declare class Logger implements LoggerService {
    private context?;
    private static instance;
    constructor(context?: string | undefined);
    log(message: string, context?: string): void;
    error(message: string, trace?: string, context?: string): void;
    warn(message: string, context?: string): void;
    debug(message: string, context?: string): void;
    static setLogger(logger: LoggerService): void;
    static getLogger(): LoggerService;
}
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