class Task {
  context
  delayTime
  name
  logger
  fileLogger

  constructor(taskName, delayTime, initFun, onTickFun, logFilePath='task.log') {
    this.name = taskName
    this.delayTime = delayTime

    this.init = initFun
    this.onTick = onTickFun

    this.consoleLoggerInit()
    this.fileLoggerInit(logFilePath)
  }

  consoleLoggerInit() {
    const log4js = require('log4js')

    this.logger = log4js.getLogger(this.name)
    this.logger.level = log4js.levels.TRACE
  }

  fileLoggerInit(logFilePath) {
    const log4js = require('log4js')

    log4js.configure({
      appenders: {
        main: {
          type: 'file',
          filename: logFilePath
        }
      },
      categories: {
        default: {
          appenders: ['main'],
          level: log4js.levels.TRACE
        }
      }
    })

    this.fileLogger = log4js.getLogger(this.name)
    this.fileLogger.level = log4js.levels.TRACE
  }

  async Start() {
    const task = this

    this.logger.info(`Init context or others.`)
    await this.init()

    this.logger.info(`Dida dida dida, on tick, on tick...`)
    this.interval = setInterval(async () => {
      try {
        await task.onTick()
      } catch (e) {
        task.logger.error(e)
      }
    }, this.delayTime)
  }

  async Stop() {
    clearInterval(this.interval)
  }
}

module.exports = Task