import * as winston from "winston";
import { transports as winstonTransports } from "winston";
import * as Transport from 'winston-transport';

export type LogLevel = "error" | "warn" | "info" | "verbose" | "debug" | "silly";

export interface LoggerOptions {
  logLevel: LogLevel
  transports?: Transport[],
}

export abstract class Logger {
  abstract error(message: string, meta?: any): Logger;
  abstract warn(message: string, meta?: any): Logger;
  abstract info(message: string, meta?: any): Logger;
  abstract verbose(message: string, meta?: any): Logger;
  abstract debug(message: string, meta?: any): Logger;
  abstract silly(message: string, meta?: any): Logger;
}

export function createLogger({ logLevel, transports }: LoggerOptions) {
  return winston.createLogger({
    level: logLevel,
    format: winston.format.json(),
    transports: [
      new winstonTransports.Console({ level: logLevel }),
      ...(transports ? transports : []),
    ],
  });
}