'use strict';

/**
 * @ngdoc function
 * @name tictactoeApp.controller:GameCtrl
 * @description
 * # GameCtrl
 * Controller of the tictactoeApp
 */
angular.module('tictactoeApp')
  .controller('GameCtrl', function ($scope, GameLogic, AiLogic, $timeout) {
    $scope.board = null;
    $scope.announcement = null; 

    $scope.opponent = 'AI';
    $scope.goesFirst = 'Me';
    $scope.opponentMark = 'x';
    $scope.playerMark = 'o';

    $scope.newGame = function() {
      $scope.announcement = null; 
      $scope.gameEnded = false; 
      $scope.board = GameLogic.newBoard();

      
      $scope.playerMark = ($scope.opponentMark === 'x') ? 'o' : 'x';

      if (($scope.goesFirst === 'Them') && 
          ($scope.opponent === 'human')) {
        var cache = $scope.playerMark;
        $scope.playerMark = $scope.opponentMark;
        $scope.opponentMark = cache; 
      }

      if ($scope.opponent === 'AI') {
        AiLogic.me = $scope.opponentMark;
        AiLogic.them = $scope.playerMark;  
      }
      if (($scope.goesFirst === 'Them') && 
          ($scope.opponent === 'AI')) {
        var openingMove = AiLogic.decideMove($scope.board);

        $scope.aiMove(openingMove);
      }
    };

    $scope.gameEnded = false; 

    $scope.gameEnd = function(winner) {
      if (winner) {
        $scope.gameEnded = true; 
        $scope.announcement = winner+' wins!';
      } else {
        $scope.gameEnded = true; 
        $scope.announcement = 'Nobody wins!'; 
      }

      $timeout(function() {
        $scope.board = null;
      }, 3000);
    }; 

    $scope.aiMove = function(where) {

      var row = where.row,
          col = where.column;

       $scope.board[row][col].space = $scope.opponentMark; 
    };

    $scope.userMove = function(where) {
      var rowIndex = where.row, 
          colIndex = where.column, 
          winner, 
          space = $scope.board[rowIndex][colIndex].space;

      if ((space === '') && (!$scope.gameEnded)) {
        $scope.board[rowIndex][colIndex].space = $scope.playerMark;
        winner = GameLogic.won($scope.board); 
        if (winner) {
          $scope.gameEnd(winner);
        } else {
          if (GameLogic.draw($scope.board)) {
            $scope.gameEnd();
          } else {
            if ($scope.opponent === 'AI') {
              var response = AiLogic.decideMove($scope.board);
              $scope.aiMove(response);
              winner = GameLogic.won($scope.board); 
              if (winner) {
                $scope.gameEnd(winner);
              } else {
                if (GameLogic.draw($scope.board)) {
                  $scope.gameEnd();
                }
              }
            } else {
              var cache = $scope.playerMark;
              $scope.playerMark = $scope.opponentMark;
              $scope.opponentMark = cache; 
            }
          }
        }   
      }      
    };

    $scope.isLast = function(check) {
      return check ? 'last' : null;   
    };
  });