import { Disposable } from 'vscode-jsonrpc';
export declare enum LogLevel {
    Error = "error",
    Warn = "warn",
    Info = "info",
    Log = "log"
}
export interface ConsoleInterface {
    error: (message: string) => void;
    warn: (message: string) => void;
    info: (message: string) => void;
    log: (message: string) => void;
}
export declare namespace ConsoleInterface {
    function is(obj: any): obj is ConsoleInterface;
    function hasLevel(console: any): console is ConsoleInterface & {
        level: LogLevel;
    };
}
export declare function getLevelNumber(level: LogLevel): number;
export declare class NullConsole implements ConsoleInterface {
    logCount: number;
    infoCount: number;
    warnCount: number;
    errorCount: number;
    log(message: string): void;
    info(message: string): void;
    warn(message: string): void;
    error(message: string): void;
}
export declare class StandardConsole implements ConsoleInterface {
    private _maxLevel;
    constructor(_maxLevel?: LogLevel);
    get level(): LogLevel;
    log(message: string): void;
    info(message: string): void;
    warn(message: string): void;
    error(message: string): void;
}
export declare class StderrConsole implements ConsoleInterface {
    private _maxLevel;
    constructor(_maxLevel?: LogLevel);
    get level(): LogLevel;
    log(message: string): void;
    info(message: string): void;
    warn(message: string): void;
    error(message: string): void;
}
export interface Chainable {
    addChain(console: ConsoleInterface): void;
    removeChain(console: ConsoleInterface): void;
}
export declare namespace Chainable {
    function is(value: any): value is Chainable;
}
export declare class ConsoleWithLogLevel implements ConsoleInterface, Chainable, Disposable {
    private _console;
    private _name;
    private readonly _chains;
    private _maxLevel;
    private _disposed;
    constructor(_console: ConsoleInterface, _name?: string);
    get level(): LogLevel;
    set level(value: LogLevel);
    dispose(): void;
    error(message: string): void;
    warn(message: string): void;
    info(message: string): void;
    log(message: string): void;
    addChain(console: ConsoleInterface): void;
    removeChain(console: ConsoleInterface): void;
    private get _prefix();
    private _log;
    private _getNumericalLevel;
    private _processChains;
}
export declare function log(console: ConsoleInterface, logType: LogLevel, msg: string): void;
export declare function convertLogLevel(logLevelValue?: string): LogLevel;