// Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)

 const probeConfig = {
  id: 'probe',
  src: 'probeService',
  onDone: [
    { target: '#acs.authorized', cond: 'isAuthorized' },
    { target: '#acs.unauthorized' },
  ],
  onError: { target: '#acs.error', actions: ['setError'] },
};

const tokenConfig = Object.assign({}, probeConfig, { src: 'tokenService' });

const config = {
  id: 'acs',
  initial: 'unknown',
  meta: {
    version: '0.0.0',
  },
  context: {
    error: null,
  },
  on: {
    login: [
      { target: 'exit', in: 'unknown' },
      { target: 'exit', in: 'unauthorized' },
      { target: 'exit', in: 'error' },
    ],
    logout: [{ target: 'exit', in: 'authorized' }],
  },
  states: {
    unknown: {
      initial: 'pending',
      states: {
        pending: {
          invoke: probeConfig,
        },
      },
    },
    authorized: {
      initial: 'idle',
      states: {
        idle: {
          on: { probe: 'pending' },
        },
        pending: {
          invoke: tokenConfig,
        },
      },
    },
    unauthorized: {
      initial: 'idle',
      states: {
        idle: {
          on: { probe: 'pending' },
        },
        pending: {
          invoke: tokenConfig,
        },
      },
    },
    exit: {
      type: 'final',
      entry: ['redirect'],
    },
    error: {
      entry: ['setError'],
      on: {
        probe: 'unknown.pending',
      },
    },
  },
};

const auth = Machine(config);