// USERCOUNT PROMISE
var userCount = promisify('userCount');

userCount.then(function(_userCount) {

   // MAKE SURE THERE ARE RECORDS
   if (_userCount > 0) {

      // LOG FOR CLARITY
      log('Reconds found: ' + _userCount);

      // LOOP THROUGH ALL USERS
      for (var x = 0; x < _userCount; x++) {

         // USER PROMISE
         var user = promisify('user', x);

         // LOG FOR CLARITY
         log('Rendering record #' + x);

         user.then(function(_user) {

            // GENERATE STRING
            var output = _user[0] + '<br>';

            // APPEND SELECTOR CONTENT
            $('body').append(output);
         });
      }

   } else {
      console.log('No records found.')
   }
});

function promisify(query, value = null) {
   return new Promise(function(resolve, reject) {

      switch(query) {

         // FETCH NUMBER OF RECORDS
         case 'userCount':
            contract.userCount((err, result) => {
               result = JSON.parse(JSON.stringify(result));
               resolve(result);
            });
         break;

         // FETCH DATA OF USER
         case 'user':
            contract.users(value, (err, result) => {
               result = JSON.parse(JSON.stringify(result));
               resolve(result);
            });
         break;

         // SET RANDOM NUMBER
         case 'setRandomNumber':
            contract.setRandomNumber(value, (error, result) => {
               // STUFF
            });
         break;

         // RANDOM NUMBER EVENT LISTENER
         case 'watchRandomNumber':
            contract.generateNumber((error, result) => {
               // STUFF
            });
         break;

         // FALLBACK
         default:
            log('Error in Switch.')
         break;
      }

   });
}

// USER ADDED EVENT
contract.userAdded(function(error, result) {
   var user = result.args.user;
   log('User "' + user + '" has been added!');

   // GENERATE OUTPUT
   var output = user + '<br>';

   // APPEND SELECTORS OLD CONTENT
   $('body').append(output);
});

// RANDOM NUMBER FUNCTIONALITY
promisify('watchRandomNumber').then(() => {

   log('Random number needed!');
   var randomNumber = Math.floor((Math.random() * 10) + 1);

   promisify('setRandomNumber', randomNumber).then(() => {
      log('Random number set to: ' + randomNumber);
   });
});

// SHORTHAND
function log(stuff) {
   console.log(stuff);
}

pragma solidity ^0.4.2;

contract Main {

    // VARIABLES
    mapping(uint256 => User) public users;
    uint256 public userCount;
    uint256 public maxPlayers;
    uint256 public randomNumber;

    // EVENTS
    event generateNumber();
    event userAdded(string user);
    event fullGame();

    struct User {
        string username;
        address owner;
        uint256 joined;
    }

    function add(string _username) public {

        if (userCount < maxPlayers) {
            users[userCount].username = _username;
            users[userCount].owner = msg.sender;
            users[userCount].joined = now;
            userCount++;
            userAdded(_username);

            if (userCount == maxPlayers) {
                generateNumber();
                finish();
            }

        } else {
            fullGame();
        }
    }

    function setRandomNumber(uint256 _number) public {
        randomNumber = _number;
    }

    function finish() public view returns(uint256) {
        return randomNumber;
    }

}