programming.js

'the apple purchase process begins';

// try to visit these 3 fruit stores in turn
for(fruitStore of [fruitStroe0, fruitStroe1, fruitStroe2]){
  'start visiting the fruit store';
  'walk to the fruit shop';

  if('the fruit store was not open'){
    'stop the process of visiting the fruit store';
  }

  if('the fruit store did not have apples'){
    'stop the process of visiting the fruit store';
  }

  if('there is less than one kilogram of red apples left in the fruit shop'){
    'stop the process of visiting the fruit store';
  }

  if('the price of red apples in this fruit store is over $10 per kilogram'){
    'ask the shopkeeper if he would like to reduce the price to $10/kg or less';
    if('the shopkeeper refused to reduce the price') {
      'stop the process of visiting the fruit store';
    }
  }
  
  'open a bag and make it the current bag';
  while('the apples in this bag weigh less than 1 kilogram'){
    'choose the best of all the red apples that are not in the bag';

    if('this apple can fit into the current bag'){
      'load this apple into the current bag';
    } else {
      // switch the bag
      if('I still have some spare bags') {
        'pick one of these and make it the current bag';
      } else {
        try('ask the shopkeeper for a bag') {
          'take the bag the shopkeeper gave me as the current bag';
        } catch ('the shopkeeper refused to give me the bag') {
          'take all the apples out of all my bags';
          'stop the process of visiting the fruit store';
        }
      }
    }
  }
  
  'based on the total weight of all the apples in all my bags and \
    the unit price given by the store owner, calculate the price I should pay'

  'ask the shopkeeper for my share of the money'
  
  if('the price I calculated' == 'the price given by the shopkeeper') {
    'pay the money to the shopkeeper';
  } else {
    'recalculate the price of the apples';
    'explain the price I have calculated to the shopkeeper and ask him if he agrees';
    if('he agrees'){
      'pay the money to the shopkeeper';
    } else {
      'take all the apples out of all my bags';
      'stop the process of visiting the fruit store';
    }
  }

  'complete the purchase process and take away all the apples';
  'stop visiting other fruit shops';
}

'the apple purchase process ends';