import { Argumental } from '../types';
export declare class Logger {
    private readonly PADDING;
    /** Detected application name. */
    private _appName;
    /** Controls colored logging. */
    private _colors;
    /** Holds custom help renderer function. */
    private _customHelp;
    /**
    * Returns the options signature of a command.
    * @param command A command definition.
    */
    private _getOptionsSignature;
    /**
    * Returns a list of named argument signatures.
    * @param command A command definition.
    */
    private _getArgumentsSignatureList;
    /**
    * Determines if any arguments are defined for any command.
    * @param definitions List of command declarations.
    */
    private _doArgumentsExist;
    /**
    * Returns the longest string length.
    * @param strings Array of strings.
    */
    private _getLongest;
    /**
    * Returns padding based on logger configuration and level.
    * @param level The padding level.
    */
    private _pad;
    /**
    * Returns option syntax from definition.
    * @param option The option definition.
    */
    private _getOptionSyntax;
    /**
    * Determines if command has any multi options.
    * @param command The command definition.
    */
    private _hasMultiOption;
    /**
    * Determines whether requirements differ between components (option declarations, argument declarations, etc.).
    * @param components An array of components.
    */
    private _doesRequirementsDiffer;
    /**
    * Determines if there are any required declarations in a set of components (option declarations, argument declarations, etc.).
    * @param components An array of components.
    */
    private _anyRequired;
    /** Application name setter. */
    set appName(name: string);
    /** Log colors setter. */
    set colors(value: boolean);
    /** Custom help renderer function setter. */
    set customHelpRenderer(renderer: Function);
    /**
    * Logs an error.
    * @param messages An array of string and/or error messages.
    */
    error(...messages: Array<string | Error>): void;
    /**
    * Displays application help in the console.
    * @param definitions Command definitions list.
    * @param cmd The invoked command name.
    */
    help(definitions: Argumental.List<Argumental.CommandDeclaration>, cmd: string): void;
}