const appState = require('@vanioinformatika/appstate')()

const appState = require('@vanioinformatika/appstate')((appState, newAppState) => {
  console.log(`App state has changed from ${appState} to ${newAppState}`)
})

let logger = require('pino')()
const appState = require('@vanioinformatika/appstate')((appState, newAppState) => {
  logger.warn(`App state has changed from ${appState} to ${newAppState}`)
})

const appState = require('@vanioinformatika/appstate')()
appState.init()
appState.running()
appState.stopped()
appState.error()
appState.fatal()

const appState = require('@vanioinformatika/appstate')()
appState.isInit()
appState.isRunning()
appState.isStopped()
appState.isError()
appState.isFatal()

const appState = require('@vanioinformatika/appstate')()
let applicationState = appState.get()

const appState = require('@vanioinformatika/appstate')()
let applicationStateValues = appState.list()

debug('info: appState has already set: ' + newAppState)
debug('warn: invalid state changes from ' + appState + ' to ' + newAppState)
debug('warn: unknow appState: ' + newAppState)

import * as AppState from '@vanioinformatika/appstate'
import { AppStateInstance } from '@vanioinformatika/appstate'
import * as Pino from 'pino'
 
// init application state handler with logger
export const init = (logger: Pino.Logger): AppStateInstance => {
  return AppState(
    (appState: string, newAppState: string): void => {
      if (newAppState === AppState.state.ERROR || newAppState === AppState.state.FATAL) {
        logger.error(`appstate ${appState} to ${newAppState}`)
      } else {
        logger.warn(`appstate ${appState} to ${newAppState}`)
      }
    },
  )
}

import { AppStateInstance } from '@vanioinformatika/appstate'
import * as appState from './appstate'
 
// initialized with logger
const appStateInstance: AppStateInstance = appState.init(logger)
 
// ... and later you can use it anywhere
process.on(
  'uncaughtException',
  (err): void => {
    appStateInstance.fatal()
    // ...
  },
)