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machine.js

  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)
  
  const askAnswerMachine = Machine({
    id: 'askAnswer',
    initial: 'idle',
    context: {
      questions: [],
      last_question_index: 0
    },
    states: {
      idle: {
        on: {
          START: 'welcome'
        }
      },
      welcome: {
        on: {
          NEXT_INPUT: 'ask_question'
        }
      },
      show_question: {
        on: {
          FINAL_QUESTION: 'wait_for_submit',
          QUESTION_SHOWED: 'waiting_answer'
        }
      },
      waiting_answer: {
        on: {
          ANSWER_VALID: {
            target: 'ask_question',
            actions: assign({
              last_question_index: (context, event) => context.last_question_index + 1
            })
          },
          ANSWER_INVALID: 'ask_question'
        }
      },
      wait_for_submit: {
        on: {
          SUBMIT: 'finish',
          CANCEL: 'submit_cancel',
        }
      },
      show_menu: {
        on: {
          
        }
      },
      finish: {
        
      },
      submit_cancel: {
        
      }
      
      // failure: {
      //   on: {
      //     RETRY: {
      //       target: 'loading',
      //       actions: assign({
      //         retries: (context, event) => context.retries + 1
      //       })
      //     }
      //   }
      // }
    }
  });