import fs from "fs";
import { createLogger, format, transports } from "winston";
import winstonDailyRotateFile from "winston-daily-rotate-file";

export class Logger {
  public static fileName: string = "basic";
  public static logDirectory: string = "logs";
  public static level: string = "debug";

  public static getInstance() {
    if (!this.instance) {
      if (!fs.existsSync(this.logDirectory)) {
        fs.mkdirSync(this.logDirectory);
      }
      this.instance = createLogger({
        level: this.level,
        format: format.combine(
          format.timestamp({
            format: "YYYY-MM-DD HH:mm:ss"
          }),
          // format.label({ label: path.basename(process.mainModule.filename) }),
          format.printf(
            info => `${info.timestamp} [${info.level}] ${info.message}`
          )
        ),
        transports: [
          new transports.Console({
            level: "info",
            format: format.combine(
              format.colorize(),
              format.printf(
                info => `${info.timestamp} [${info.level}] ${info.message}`
              )
            )
          }),
          new winstonDailyRotateFile({
            filename: `${this.logDirectory}/%DATE%-${this.fileName}.log`,
            datePattern: "YYYY-MM-DD"
          })
        ]
      });
    }
    return this.instance;
  }

  private static instance: any;
}