declare module 'spdlog' {

  export const version: string;
  export function setAsyncMode(bufferSize: number, flushInterval: number): void;
  export function createRotatingLogger(name: string, filename: string, filesize: number, filecount: number): RotatingLogger;
  export function createRotatingLoggerAsync(name: string, filename: string, filesize: number, filecount: number): Promise<RotatingLogger>;

  export enum LogLevel {
    CRITICAL,
    ERROR,
    WARN,
    INFO,
    DEBUG,
    TRACE,
    OFF,
  }

  export class RotatingLogger {
    constructor(name: string, filename: string, filesize: number, filecount: number);

    trace(message: string): void;
    debug(message: string): void;
    info(message: string): void;
    warn(message: string): void;
    error(message: string): void;
    critical(message: string): void;
    setLevel(level: number): void;
    clearFormatters(): void;
    setPattern(str: string): void;

    /**
    * A synchronous operation to flush the contents into file
    */
    flush(): void;
    drop(): void;
  }
}