Done

bin/tictactoe

@@ -1,3 +1,33 @@
 #!/usr/bin/env ruby
-
+require 'pry'
 require_relative '../config/environment'
+
+game_mode = 0
+until game_mode >= 1 && game_mode <= 4
+  puts "Please select game mode:"
+  puts "1. Human vs. Human"
+  puts "2. Human vs. Computer"
+  puts "3. Computer vs. Computer"
+  puts "4. War Games Mode"
+  game_mode = gets.strip.to_i
+end
+
+case game_mode
+when 1
+  new_game = Game.new
+  new_game.play
+when 2
+  new_game = Mixed_Game.new
+  new_game.play
+when 3
+  new_game = Computer_Game.new
+  new_game.play
+when 4
+  counter = 0
+  until counter == 100
+    new_game = War_Game.new
+    new_game.play
+    counter += 1
+  end
+  puts War_Game.all
+end

lib/board.rb

@@ -0,0 +1,46 @@
+require 'pry'
+
+class Board
+  attr_accessor :cells
+
+  def initialize
+    @cells = [" "," "," "," "," "," "," "," "," "]
+  end
+
+  def reset!
+    @cells = [" "," "," "," "," "," "," "," "," "]
+  end
+
+  def display
+    puts " #{cells[0]} | #{cells[1]} | #{cells[2]} "
+    puts "-----------"
+    puts " #{cells[3]} | #{cells[4]} | #{cells[5]} "
+    puts "-----------"
+    puts " #{cells[6]} | #{cells[7]} | #{cells[8]} "
+  end
+
+  def position(input)
+    cells[input.to_i - 1]
+  end
+
+  def full?
+    turn_count == 9
+  end
+
+  def turn_count
+    cells.select{|c| c != " "}.count
+  end
+
+  def taken?(position)
+    cells[position.to_i - 1] == "X" || cells[position.to_i - 1] == "O"
+  end
+
+  def valid_move?(input)
+    input.to_i >= 1 && input.to_i <= 9 && !taken?(input)
+  end
+
+  def update(input, player)
+    cells[input.to_i - 1] = player.token
+  end
+
+end

lib/computer_game.rb

@@ -0,0 +1,77 @@
+require 'pry'
+
+class Computer_Game
+  attr_accessor :board, :player_1, :player_2
+
+  WIN_COMBINATIONS = [
+    [0,1,2],
+    [3,4,5],
+    [6,7,8],
+    [0,3,6],
+    [1,4,7],
+    [2,5,8],
+    [0,4,8],
+    [2,4,6]
+  ]
+
+  @@all_winners = {"X": 0, "O": 0}
+
+  def initialize(player_1 = Players::Computer.new("X"), player_2 = Players::Computer.new("O"), board = Board.new)
+    @player_1 = player_1
+    @player_2 = player_2
+    @board = board
+
+  end
+
+  def current_player
+    @board.turn_count.even?? @player_1 : @player_2
+  end
+
+  def won?
+    WIN_COMBINATIONS.detect do |combo|
+      @board.cells[combo[0]] == @board.cells[combo[1]] &&
+      @board.cells[combo[0]] == @board.cells[combo[2]] &&
+      @board.cells[combo[0]] != " "
+    end
+  end
+
+  def draw?
+    @board.full? && !won?
+  end
+
+  def over?
+    draw? || won?
+  end
+
+  def winner
+    if won?
+      @@all_winners[@board.cells[won?[0]]] += 1
+      @board.cells[won?[0]]
+    end
+  end
+
+  def turn
+    input = current_player.move(board).to_i
+    remember_player = current_player.token
+    if @board.valid_move?(input)
+      @board.cells[input - 1] = current_player.token
+      @board.display
+      puts "Computer player #{remember_player} has selected position #{input}."
+      sleep 3
+    else
+      turn
+    end
+  end
+
+  def play
+    until over?
+      turn
+    end
+    if won?
+      puts "Congratulations #{winner}!"
+    elsif draw?
+      puts "Cat's Game!"
+    end
+  end
+
+end

lib/game.rb

@@ -0,0 +1,70 @@
+require 'pry'
+
+class Game
+  attr_accessor :board, :player_1, :player_2
+
+  WIN_COMBINATIONS = [
+    [0,1,2],
+    [3,4,5],
+    [6,7,8],
+    [0,3,6],
+    [1,4,7],
+    [2,5,8],
+    [0,4,8],
+    [2,4,6]
+  ]
+
+  def initialize(player_1 = Players::Human.new("X"), player_2 = Players::Human.new("O"), board = Board.new)
+    @player_1 = player_1
+    @player_2 = player_2
+    @board = board
+  end
+
+  def current_player
+    @board.turn_count.even?? @player_1 : @player_2
+  end
+
+  def won?
+    WIN_COMBINATIONS.detect do |combo|
+      @board.cells[combo[0]] == @board.cells[combo[1]] &&
+      @board.cells[combo[0]] == @board.cells[combo[2]] &&
+      @board.cells[combo[0]] != " "
+    end
+  end
+
+  def draw?
+    @board.full? && !won?
+  end
+
+  def over?
+    draw? || won?
+  end
+
+  def winner
+    if won?
+      @board.cells[won?[0]]
+    end
+  end
+
+  def turn
+    input = current_player.move(board).to_i
+    if @board.valid_move?(input)
+      @board.cells[input - 1] = current_player.token
+      @board.display
+    else
+      turn
+    end
+  end
+
+  def play
+    until over?
+      turn
+    end
+    if won?
+      puts "Congratulations #{winner}!"
+    elsif draw?
+      puts "Cat's Game!"
+    end
+  end
+
+end

lib/mixed_game.rb

@@ -0,0 +1,88 @@
+require 'pry'
+
+class Mixed_Game
+  attr_accessor :board, :player_1, :player_2
+
+  WIN_COMBINATIONS = [
+    [0,1,2],
+    [3,4,5],
+    [6,7,8],
+    [0,3,6],
+    [1,4,7],
+    [2,5,8],
+    [0,4,8],
+    [2,4,6]
+  ]
+
+  @@all_winners = {"X": 0, "O": 0, "Draw": 0}
+
+  def initialize(player_1 = Players::Computer.new("X"), player_2 = Players::Human.new("O"), board = Board.new)
+    @player_1 = player_1
+    @player_2 = player_2
+    @board = board
+
+  end
+
+  def current_player
+    @board.turn_count.even?? @player_1 : @player_2
+  end
+
+  def won?
+    WIN_COMBINATIONS.detect do |combo|
+      @board.cells[combo[0]] == @board.cells[combo[1]] &&
+      @board.cells[combo[0]] == @board.cells[combo[2]] &&
+      @board.cells[combo[0]] != " "
+    end
+  end
+
+  def draw?
+    @board.full? && !won?
+  end
+
+  def over?
+    draw? || won?
+  end
+
+  def winner
+    if won?
+      @board.cells[won?[0]]
+    end
+  end
+
+  def turn
+    input = current_player.move(board).to_i
+    remember_player = current_player.token
+    if @board.valid_move?(input)
+      @board.cells[input - 1] = current_player.token
+      @board.display
+      puts "Computer player #{remember_player} has selected position #{input}."
+    else
+      turn
+    end
+  end
+
+  def play
+
+    until over?
+      turn
+    end
+
+    if won?
+      puts "Congratulations #{winner}!"
+      if winner == "X"
+        @@all_winners[:X] += 1
+      elsif winner == "O"
+        @@all_winners[:O] += 1
+      end
+    elsif draw?
+      puts "Cat's Game!"
+      @@all_winners[:Draw] += 1
+    end
+
+  end
+
+  def self.all
+    @@all_winners
+  end
+
+end

lib/player.rb

@@ -0,0 +1,10 @@
+require 'pry'
+
+class Player
+  attr_reader :token
+
+  def initialize(token)
+    @token = token
+  end
+
+end

lib/players/computer.rb

@@ -0,0 +1,57 @@
+require 'pry'
+
+module Players
+  class Computer < Player
+
+    WIN_COMBINATIONS = [
+      [0,1,2],
+      [3,4,5],
+      [6,7,8],
+      [0,3,6],
+      [1,4,7],
+      [2,5,8],
+      [0,4,8],
+      [2,4,6]
+    ]
+
+    def move(board)
+      current = nil
+      turn_two = [1,3,7,9]
+      all_options = [1,2,3,4,5,6,7,8,9]
+      case board.turn_count
+      when 0
+        "5"
+      when 1
+        current = turn_two[rand(4)]
+        current.to_s
+      when 2
+        current = board.cells.index("O") + 1
+        turn_three = turn_two
+        turn_three.delete(current)
+        turn_three.delete(10 - current)
+        current = turn_three[rand(2)]
+        current.to_s
+      when 3..8
+        close_to_winning = WIN_COMBINATIONS.detect do |combo|
+          ((board.cells[combo[0]] == board.cells[combo[1]] && board.cells[combo[2]] == " ") ||
+          (board.cells[combo[0]] == board.cells[combo[2]] && board.cells[combo[1]] == " ") ||
+          (board.cells[combo[1]] == board.cells[combo[2]] && board.cells[combo[0]] == " ")) &&
+          !(board.cells[combo[0]] == board.cells[combo[1]] && board.cells[combo[0]] == board.cells[combo[2]])
+        end
+
+        if close_to_winning
+          win_blocker = close_to_winning.detect{|cell| board.cells[cell] == " "}
+          next_move = win_blocker + 1
+        elsif !close_to_winning
+          all_options = []
+          board.cells.each_with_index do |cell, index|
+            all_options << (index + 1) if cell == " "
+          end
+
+          next_move = all_options[rand(all_options.length)]
+        end
+        next_move.to_s
+      end
+    end
+  end
+end