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

const guards = {
    isSessionPresent: (context, event) => { return null }, // todo: get info from global state about whether there is a user
    sessionNotPresent: (context, event) => { return null },
}

const mainStates = {
            'loading': {
              on: {
              '': 'checkingForSession',
                // TRANSIENT TRANSITION
                '': [
                    { target: 'checkingForSession' },
                    { target: 'loggedIn', cond: 'isSessionPresent' },
                    { target: 'notLoggedIn', cond: 'sessionNotPresent' }
                  ],          
              }
            },
            'checkingForSession': {
                on: {
                    SUCCESS: 'loggedIn',
                    FAILURE: 'notLoggedIn', // whats the difference between this and error
                    ERROR: 'error', // must pass error along
                }
            },
            'loggedIn': {
                on: {
                    LOGOUT: 'loggedOut'
                }
            },
            'notLoggedIn': {
                on: {
                    LOGIN: 'tryingLogin'
                }
            },
            'tryingLogin': {
                on: {
                    SUCCESS: 'loggedIn',
                    FAILURE: 'notLoggedIn', // whats the difference between this and error
                    ERROR: 'error', // must pass error along                    
                }
            },
            // 'BAD_LOGIN': {},
            'loggedOut': {},
            'error': {},
}
  const config = {
    id: 'app',
    initial: 'loading',
    context: {},
    states: mainStates
}
          // Transient transition
          // Will transition to either 'win' or 'lose' immediately upon
          // (re)entering 'playing' state if the condition is met.


  const fetchMachine = Machine(config, { guards });