/// <reference path="../../typings/index.d.ts" />

import {Global} from "./global";
import * as winston from "winston";

export class LoggingHelper {
    public static debug (logger: string, message: string): void {
        LoggingHelper.log("debug", logger, message);
    }

    public static info (logger: string, message: string): void {
        LoggingHelper.log("info", logger, message);
    }

    public static warn (logger: string, message: string): void {
        LoggingHelper.log("warn", logger, message);
    }

    public static error (logger: string, message: string): void {
        LoggingHelper.log("error", logger, message);
    }

    private static log(level: string, logger: string, message: string) {
        winston.log(level, logger + " " + message);
    }

    public static initialize (): void {
        winston.clear();
        winston.add(winston.transports.Console,
            {
                formatter: LoggingHelper.formatter,
                level: "info"
            }
        );
    }

    private static formatter(options: any): string {
        return new Date().toISOString() + " "
            + options.level.toUpperCase() + " "
            + (undefined !== options.message ? options.message : "")
            + (options.meta && Object.keys(options.meta).length ? "\n\t"
            + JSON.stringify(options.meta) : "" );
    }
}