diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e27aae6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,116 @@
+# Created by .ignore support plugin (hsz.mobi)
+### JetBrains template
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and WebStorm
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+**/.idea/**/workspace.xml
+**/.idea/**/tasks.xml
+**/.idea/**/usage.statistics.xml
+**/.idea/**/dictionaries
+**/.idea/**/shelf
+
+# Generated files
+**/.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+**/.idea/**/dataSources/
+**/.idea/**/dataSources.ids
+**/.idea/**/dataSources.local.xml
+**/.idea/**/sqlDataSources.xml
+**/.idea/**/dynamic.xml
+**/.idea/**/uiDesigner.xml
+**/.idea/**/dbnavigator.xml
+
+# Gradle
+**/.idea/**/gradle.xml
+**/.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn. Uncomment if using
+# auto-import.
+**/.idea/artifacts
+**/.idea/compiler.xml
+**/.idea/modules.xml
+**/.idea/*.iml
+**/.idea/modules
+**/*.iml
+**/*.ipr
+
+# CMake
+**/cmake-build-*/
+
+# Mongo Explorer plugin
+**/.idea/**/mongoSettings.xml
+
+# File-based project format
+**/*.iws
+
+# IntelliJ
+**/out/
+
+# mpeltonen/sbt-idea plugin
+**/.idea_modules/
+
+# JIRA plugin
+**/atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+**/.idea/replstate.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+**/com_crashlytics_export_strings.xml
+**/crashlytics.properties
+**/crashlytics-build.properties
+**/fabric.properties
+
+# Editor-based Rest Client
+**/.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+**/.idea/caches/build_file_checksums.ser
+
+### Java template
+# Compiled class file
+**/*.class
+
+# Log file
+**/*.log
+
+# BlueJ files
+**/*.ctxt
+
+# Mobile Tools for Java (J2ME)
+**/.mtj.tmp/
+
+# Package Files #
+**/*.jar
+**/*.war
+**/*.nar
+**/*.ear
+**/*.zip
+**/*.tar.gz
+**/*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+**/hs_err_pid*
+
+### Gradle template
+**/.gradle
+**/build/
+
+# Ignore Gradle GUI config
+**/gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# Cache of project
+**/.gradletasknamecache
+
+# # Work around https://youtrack.jetbrains.com/issue/IDEA-116898
+# gradle/wrapper/gradle-wrapper.properties
+
+
+**/.DS_Store
diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/.name b/.idea/.name
new file mode 100644
index 0000000..10029c6
--- /dev/null
+++ b/.idea/.name
@@ -0,0 +1 @@
+UltimateTicTacToe
\ No newline at end of file
diff --git a/.idea/jarRepositories.xml b/.idea/jarRepositories.xml
new file mode 100644
index 0000000..fdc392f
--- /dev/null
+++ b/.idea/jarRepositories.xml
@@ -0,0 +1,20 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..fe0b0da
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,10 @@
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/runConfigurations/Link.xml b/.idea/runConfigurations/Link.xml
new file mode 100644
index 0000000..d453adb
--- /dev/null
+++ b/.idea/runConfigurations/Link.xml
@@ -0,0 +1,21 @@
+
+
+
+
+
+
+
+
+
+
+
+ true
+ true
+ false
+
+
+
\ No newline at end of file
diff --git a/.idea/runConfigurations/Run.xml b/.idea/runConfigurations/Run.xml
new file mode 100644
index 0000000..898d511
--- /dev/null
+++ b/.idea/runConfigurations/Run.xml
@@ -0,0 +1,15 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..94a25f7
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..2577078
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,19 @@
+plugins {
+ id 'java'
+}
+
+group 'de.icaotix.ultimatetictactoe'
+version '1.0-SNAPSHOT'
+
+repositories {
+ mavenCentral()
+}
+
+dependencies {
+ testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.1'
+ testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.1'
+}
+
+test {
+ useJUnitPlatform()
+}
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..7454180
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..a0f7639
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-all.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100644
index 0000000..744e882
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+## Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+ ls=`ls -ld "$PRG"`
+ link=`expr "$ls" : '.*-> \(.*\)$'`
+ if expr "$link" : '/.*' > /dev/null; then
+ PRG="$link"
+ else
+ PRG=`dirname "$PRG"`"/$link"
+ fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+ echo "$*"
+}
+
+die () {
+ echo
+ echo "$*"
+ echo
+ exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+ CYGWIN* )
+ cygwin=true
+ ;;
+ Darwin* )
+ darwin=true
+ ;;
+ MSYS* | MINGW* )
+ msys=true
+ ;;
+ NONSTOP* )
+ nonstop=true
+ ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+ if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+ # IBM's JDK on AIX uses strange locations for the executables
+ JAVACMD="$JAVA_HOME/jre/sh/java"
+ else
+ JAVACMD="$JAVA_HOME/bin/java"
+ fi
+ if [ ! -x "$JAVACMD" ] ; then
+ die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+else
+ JAVACMD="java"
+ which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+ MAX_FD_LIMIT=`ulimit -H -n`
+ if [ $? -eq 0 ] ; then
+ if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+ MAX_FD="$MAX_FD_LIMIT"
+ fi
+ ulimit -n $MAX_FD
+ if [ $? -ne 0 ] ; then
+ warn "Could not set maximum file descriptor limit: $MAX_FD"
+ fi
+ else
+ warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+ fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+ GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+ APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+ CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+ JAVACMD=`cygpath --unix "$JAVACMD"`
+
+ # We build the pattern for arguments to be converted via cygpath
+ ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+ SEP=""
+ for dir in $ROOTDIRSRAW ; do
+ ROOTDIRS="$ROOTDIRS$SEP$dir"
+ SEP="|"
+ done
+ OURCYGPATTERN="(^($ROOTDIRS))"
+ # Add a user-defined pattern to the cygpath arguments
+ if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+ OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+ fi
+ # Now convert the arguments - kludge to limit ourselves to /bin/sh
+ i=0
+ for arg in "$@" ; do
+ CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+ CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
+
+ if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
+ eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+ else
+ eval `echo args$i`="\"$arg\""
+ fi
+ i=`expr $i + 1`
+ done
+ case $i in
+ 0) set -- ;;
+ 1) set -- "$args0" ;;
+ 2) set -- "$args0" "$args1" ;;
+ 3) set -- "$args0" "$args1" "$args2" ;;
+ 4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+ 5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+ 6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+ 7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+ 8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+ 9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+ esac
+fi
+
+# Escape application args
+save () {
+ for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+ echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..107acd3
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..8f6e411
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,2 @@
+rootProject.name = 'UltimateTicTacToe'
+
diff --git a/src/main/java/ultimatetictactoe/Main.java b/src/main/java/ultimatetictactoe/Main.java
new file mode 100644
index 0000000..9e7c0e1
--- /dev/null
+++ b/src/main/java/ultimatetictactoe/Main.java
@@ -0,0 +1,20 @@
+package ultimatetictactoe;
+
+import ultimatetictactoe.view.UltimateTicTacToeView;
+import ultimatetictactoe.viewmodel.UltimateTicTacToePanelViewModel;
+
+import javax.swing.*;
+
+public class Main {
+
+ public static void main(String[] args) {
+
+
+ SwingUtilities.invokeLater(() -> {
+ final UltimateTicTacToePanelViewModel ultimateTicTacToePanelViewModel = new UltimateTicTacToePanelViewModel();
+ new UltimateTicTacToeView(ultimateTicTacToePanelViewModel);
+ ultimateTicTacToePanelViewModel.prepareNextMove();
+ });
+
+ }
+}
diff --git a/src/main/java/ultimatetictactoe/model/CellState.java b/src/main/java/ultimatetictactoe/model/CellState.java
new file mode 100644
index 0000000..80842ad
--- /dev/null
+++ b/src/main/java/ultimatetictactoe/model/CellState.java
@@ -0,0 +1,13 @@
+package ultimatetictactoe.model;
+
+public enum CellState {
+ X("X"),
+ O("O"),
+ EMPTY("");
+
+ public String displayText;
+
+ CellState(String displayText) {
+ this.displayText = displayText;
+ }
+}
diff --git a/src/main/java/ultimatetictactoe/model/GameState.java b/src/main/java/ultimatetictactoe/model/GameState.java
new file mode 100644
index 0000000..728c0bd
--- /dev/null
+++ b/src/main/java/ultimatetictactoe/model/GameState.java
@@ -0,0 +1,14 @@
+package ultimatetictactoe.model;
+
+public enum GameState {
+ X_WON("X won"),
+ O_WON("O won"),
+ DRAW("Draw"),
+ RUNNING("Still running");
+
+ public String displayText;
+
+ GameState(String displayText) {
+ this.displayText = displayText;
+ }
+}
diff --git a/src/main/java/ultimatetictactoe/model/Player.java b/src/main/java/ultimatetictactoe/model/Player.java
new file mode 100644
index 0000000..7638819
--- /dev/null
+++ b/src/main/java/ultimatetictactoe/model/Player.java
@@ -0,0 +1,6 @@
+package ultimatetictactoe.model;
+
+public enum Player {
+ X,
+ O
+}
diff --git a/src/main/java/ultimatetictactoe/model/TicTacToeGame.java b/src/main/java/ultimatetictactoe/model/TicTacToeGame.java
new file mode 100644
index 0000000..7321836
--- /dev/null
+++ b/src/main/java/ultimatetictactoe/model/TicTacToeGame.java
@@ -0,0 +1,103 @@
+package ultimatetictactoe.model;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+
+public class TicTacToeGame {
+
+ public static final Integer[][] winningCombinations = new Integer[][]{
+ {0, 1, 2},
+ {3, 4, 5},
+ {6, 7, 8},
+ {0, 3, 6},
+ {1, 4, 7},
+ {2, 5, 8},
+ {0, 4, 8},
+ {2, 4, 6}
+ };
+
+ private final CellState[] cells;
+ private GameState state;
+
+ public TicTacToeGame() {
+ this.cells = new CellState[9];
+ Arrays.fill(cells, CellState.EMPTY);
+ this.state = GameState.RUNNING;
+ }
+
+ public void setCellState(int cell, CellState state) {
+ if (this.state != GameState.RUNNING) return;
+ if (this.cells[cell] == CellState.EMPTY) {
+ this.cells[cell] = state;
+ updateGameState();
+ }
+ }
+
+ public CellState[] getCells() {
+ return cells;
+ }
+
+ public List getAvailableFields() {
+ final LinkedList emptyFields = new LinkedList<>();
+ for (int i = 0; i < this.cells.length; i++) {
+ if (this.cells[i] == CellState.EMPTY) {
+ emptyFields.add(i);
+ }
+ }
+ return emptyFields;
+ }
+
+ public boolean isFinished() {
+ return this.state != GameState.RUNNING;
+ }
+
+ public void setState(GameState state) {
+ this.state = state;
+ }
+
+ public GameState getState() {
+ return state;
+ }
+
+ private void updateGameState() {
+ for (Integer[] winningCombination : winningCombinations) {
+ final HashSet interestingStates = new HashSet<>();
+ interestingStates.add(this.cells[winningCombination[0]]);
+ interestingStates.add(this.cells[winningCombination[1]]);
+ interestingStates.add(this.cells[winningCombination[2]]);
+ if (interestingStates.size() == 1 && !interestingStates.contains(CellState.EMPTY)) {
+ switch (this.cells[winningCombination[0]]) {
+ case O:
+ this.state = GameState.O_WON;
+ break;
+ case X:
+ this.state = GameState.X_WON;
+ break;
+ }
+ return;
+ }
+ }
+
+ if (Arrays.stream(this.cells).allMatch(cellState -> cellState != CellState.EMPTY)) {
+ this.state = GameState.DRAW;
+ }
+ }
+
+ // DEBUG
+ public static void printField(TicTacToeGame game) {
+ final CellState[] cells = game.getCells();
+ System.out.println("--------------CURRENT STATE--------------");
+ for (int i = 0; i < cells.length; i++) {
+ System.out.print(cells[i] + " ");
+ if ((i + 1) % 3 == 0) {
+ System.out.println();
+ }
+ }
+ System.out.println("FREE: " + game.getAvailableFields());
+ System.out.println("STATE: " + game.getState());
+ System.out.println("IS FINISHED: " + game.isFinished());
+ }
+
+}
diff --git a/src/main/java/ultimatetictactoe/model/UltimateTicTacToe.java b/src/main/java/ultimatetictactoe/model/UltimateTicTacToe.java
new file mode 100644
index 0000000..871e238
--- /dev/null
+++ b/src/main/java/ultimatetictactoe/model/UltimateTicTacToe.java
@@ -0,0 +1,92 @@
+package ultimatetictactoe.model;
+
+import java.util.Arrays;
+import java.util.HashSet;
+
+public class UltimateTicTacToe {
+
+ private final TicTacToeGame[] subGames;
+ private final GameState[] masterGameStates;
+ private Player currentPlayer;
+ private int activeField;
+ private GameState gameState;
+
+ public UltimateTicTacToe() {
+ this.subGames = new TicTacToeGame[9];
+ for (int i = 0; i < this.subGames.length; i++) {
+ this.subGames[i] = new TicTacToeGame();
+ }
+ this.masterGameStates = new GameState[9];
+ Arrays.fill(this.masterGameStates, GameState.RUNNING);
+
+ // X always starts in the center field
+ this.currentPlayer = Player.X;
+ this.activeField = 4;
+ this.gameState = GameState.RUNNING;
+ }
+
+ public TicTacToeGame getSubGame(int id) {
+ return this.subGames[id];
+ }
+
+ public int getActiveField() {
+ return activeField;
+ }
+
+ public Player getCurrentPlayer() {
+ return this.currentPlayer;
+ }
+
+ public GameState getGameState() {
+ return gameState;
+ }
+
+ public void doPlayerMove(int cell) {
+ if (!getSubGame(this.activeField).getAvailableFields().contains(cell)) return;
+
+ CellState nextCellState = this.currentPlayer == Player.X ? CellState.X : CellState.O;
+ getSubGame(this.activeField).setCellState(cell, nextCellState);
+
+ this.masterGameStates[this.activeField] = getSubGame(this.activeField).getState();
+
+ updateGameState();
+
+ if (this.gameState == GameState.RUNNING) {
+ this.activeField = findNextAvailableSubGame(cell);
+ this.currentPlayer = this.currentPlayer == Player.X ? Player.O : Player.X;
+ }
+
+ }
+
+ private void updateGameState() {
+ for (Integer[] winningCombination : TicTacToeGame.winningCombinations) {
+ final HashSet interestingStates = new HashSet<>();
+ interestingStates.add(this.masterGameStates[winningCombination[0]]);
+ interestingStates.add(this.masterGameStates[winningCombination[1]]);
+ interestingStates.add(this.masterGameStates[winningCombination[2]]);
+ if (interestingStates.size() == 1 && !interestingStates.contains(GameState.RUNNING)) {
+ switch (this.masterGameStates[winningCombination[0]]) {
+ case O_WON:
+ this.gameState = GameState.O_WON;
+ break;
+ case X_WON:
+ this.gameState = GameState.X_WON;
+ break;
+ }
+ return;
+ }
+ }
+
+ if (Arrays.stream(this.masterGameStates).allMatch(gameState -> gameState != GameState.RUNNING)) {
+ this.gameState = GameState.DRAW;
+ }
+ }
+
+ private int findNextAvailableSubGame(int startingIndex) {
+ while (this.subGames[startingIndex].isFinished()) {
+ startingIndex = (startingIndex + 1) % 9;
+ }
+ return startingIndex;
+ }
+
+}
diff --git a/src/main/java/ultimatetictactoe/view/TicTacToeView.java b/src/main/java/ultimatetictactoe/view/TicTacToeView.java
new file mode 100644
index 0000000..8a9d722
--- /dev/null
+++ b/src/main/java/ultimatetictactoe/view/TicTacToeView.java
@@ -0,0 +1,66 @@
+package ultimatetictactoe.view;
+
+import ultimatetictactoe.viewmodel.TicTacToePanelViewModel;
+
+import javax.swing.*;
+import java.awt.*;
+import java.util.List;
+
+public class TicTacToeView {
+
+ private final TicTacToePanelViewModel viewModel;
+ private final JPanel view;
+ private final Button[] buttons;
+
+ public TicTacToeView(TicTacToePanelViewModel viewModel) {
+ this.viewModel = viewModel;
+ this.buttons = new Button[9];
+ this.view = new JPanel(new GridLayout(3, 3, 0, 0));
+ view.setBorder(BorderFactory.createLineBorder(Color.BLACK, 2));
+
+ for (int i = 0; i < 9; i++) {
+ var btn = new Button("");
+ btn.setEnabled(false);
+ btn.setActionCommand(Integer.toString(i));
+ btn.addActionListener(e -> {
+ viewModel.onButtonClicked(Integer.parseInt(e.getActionCommand()));
+ });
+ buttons[i] = btn;
+ view.add(btn);
+ }
+ this.viewModel.setActivateCallback(this::activate);
+ this.viewModel.setDeactivateCallback(this::deactivate);
+ this.viewModel.setFinishPanelCallback(this::setFinishPanel);
+ this.viewModel.setButtonTextCallback(this::setButtonText);
+ }
+
+ public JPanel getView() {
+ return this.view;
+ }
+
+ public void setButtonText(int btnId, String text) {
+ this.buttons[btnId].setLabel(text);
+ }
+
+ public void activate(List btnIds) {
+ for (Integer btnId : btnIds) {
+ this.buttons[btnId].setEnabled(true);
+ }
+ }
+
+ public void deactivate() {
+ for (Button button : buttons) {
+ button.setEnabled(false);
+ }
+ }
+
+ public void setFinishPanel(String finishString) {
+ this.view.removeAll();
+ this.view.setLayout(new BorderLayout());
+ Button winnerLabel = new Button(finishString);
+ Font font = new Font(Font.SANS_SERIF, Font.BOLD, 15);
+ winnerLabel.setFont(font);
+ this.view.add(winnerLabel);
+ }
+
+}
diff --git a/src/main/java/ultimatetictactoe/view/UltimateTicTacToeView.java b/src/main/java/ultimatetictactoe/view/UltimateTicTacToeView.java
new file mode 100644
index 0000000..a190a65
--- /dev/null
+++ b/src/main/java/ultimatetictactoe/view/UltimateTicTacToeView.java
@@ -0,0 +1,42 @@
+package ultimatetictactoe.view;
+
+import ultimatetictactoe.viewmodel.TicTacToePanelViewModel;
+import ultimatetictactoe.viewmodel.UltimateTicTacToePanelViewModel;
+
+import javax.swing.*;
+import java.awt.*;
+
+
+public class UltimateTicTacToeView extends JFrame {
+
+ private final UltimateTicTacToePanelViewModel viewModel;
+
+ public UltimateTicTacToeView(UltimateTicTacToePanelViewModel viewModel) {
+ super("Ultimate TicTacToe");
+ this.viewModel = viewModel;
+ this.setDefaultCloseOperation(EXIT_ON_CLOSE);
+
+ //Create and set up the window.
+ this.setLayout(new GridLayout(3, 3, 2, 2));
+
+ for (int i = 0; i < 9; i++) {
+ TicTacToePanelViewModel subViewModel = viewModel.getSubGameViewModel(i);
+ this.add(new TicTacToeView(subViewModel).getView());
+ }
+
+ this.viewModel.setGameResultCallback(this::setGameResult);
+
+ //Display the window.
+ this.setSize(new Dimension(500, 500));
+ this.setVisible(true);
+ }
+
+ public void setGameResult(String resultText) {
+ this.removeAll();
+ this.setLayout(new BorderLayout());
+ Button winnerLabel = new Button(resultText);
+ Font font = new Font(Font.SANS_SERIF, Font.BOLD, 15);
+ winnerLabel.setFont(font);
+ this.add(winnerLabel);
+ }
+}
diff --git a/src/main/java/ultimatetictactoe/viewmodel/TicTacToePanelViewModel.java b/src/main/java/ultimatetictactoe/viewmodel/TicTacToePanelViewModel.java
new file mode 100644
index 0000000..73d32d8
--- /dev/null
+++ b/src/main/java/ultimatetictactoe/viewmodel/TicTacToePanelViewModel.java
@@ -0,0 +1,63 @@
+package ultimatetictactoe.viewmodel;
+
+import java.util.List;
+import java.util.function.BiConsumer;
+import java.util.function.Consumer;
+
+public class TicTacToePanelViewModel {
+
+ private final UltimateTicTacToePanelViewModel ultimateTicTacToePanelViewModel;
+ private Consumer> activateCallback;
+ private Runnable deactivateCallback;
+ private Consumer finishPanelCallback;
+ private BiConsumer buttonTextCallback;
+
+ public TicTacToePanelViewModel(UltimateTicTacToePanelViewModel ultimateTicTacToePanelViewModel) {
+ this.ultimateTicTacToePanelViewModel = ultimateTicTacToePanelViewModel;
+ }
+
+ public void setActivateCallback(Consumer> activateCallback) {
+ this.activateCallback = activateCallback;
+ }
+
+ public void setDeactivateCallback(Runnable deactivateCallback) {
+ this.deactivateCallback = deactivateCallback;
+ }
+
+ public void setButtonTextCallback(BiConsumer buttonTextCallback) {
+ this.buttonTextCallback = buttonTextCallback;
+ }
+
+ public void setFinishPanelCallback(Consumer finishPanelCallback) {
+ this.finishPanelCallback = finishPanelCallback;
+ }
+
+ public void onButtonClicked(int cell) {
+ this.ultimateTicTacToePanelViewModel.onCellClicked(cell);
+ }
+
+ public void activate(List activeBtnIds) {
+ if (this.activateCallback != null) {
+ this.activateCallback.accept(activeBtnIds);
+ }
+ }
+
+ public void deactivate() {
+ if (this.deactivateCallback != null) {
+ this.deactivateCallback.run();
+ }
+ }
+
+ public void setButtonText(int btnId, String text) {
+ if (this.buttonTextCallback != null) {
+ this.buttonTextCallback.accept(btnId, text);
+ }
+ }
+
+ public void setFinishPanel(String finishString) {
+ if (this.finishPanelCallback != null) {
+ this.finishPanelCallback.accept(finishString);
+ }
+ }
+
+}
diff --git a/src/main/java/ultimatetictactoe/viewmodel/UltimateTicTacToePanelViewModel.java b/src/main/java/ultimatetictactoe/viewmodel/UltimateTicTacToePanelViewModel.java
new file mode 100644
index 0000000..ae919ec
--- /dev/null
+++ b/src/main/java/ultimatetictactoe/viewmodel/UltimateTicTacToePanelViewModel.java
@@ -0,0 +1,65 @@
+package ultimatetictactoe.viewmodel;
+
+import ultimatetictactoe.model.GameState;
+import ultimatetictactoe.model.TicTacToeGame;
+import ultimatetictactoe.model.UltimateTicTacToe;
+
+import java.util.List;
+import java.util.function.Consumer;
+
+public class UltimateTicTacToePanelViewModel {
+
+ private final TicTacToePanelViewModel[] subGameViewModels;
+ private final UltimateTicTacToe ultimateTicTacToe;
+ private Consumer gameResultCallback;
+
+ public UltimateTicTacToePanelViewModel() {
+ this.subGameViewModels = new TicTacToePanelViewModel[9];
+ for (int i = 0; i < this.subGameViewModels.length; i++) {
+ this.subGameViewModels[i] = new TicTacToePanelViewModel(this);
+ }
+ this.ultimateTicTacToe = new UltimateTicTacToe();
+ }
+
+ public void prepareNextMove() {
+ // Check if game already finished
+ if (this.ultimateTicTacToe.getGameState() != GameState.RUNNING) {
+ if (this.gameResultCallback != null) {
+ final String result = this.ultimateTicTacToe.getGameState().displayText;
+ this.gameResultCallback.accept(result);
+ return;
+ }
+ }
+ // Setup next move
+ final int fieldId = this.ultimateTicTacToe.getActiveField();
+ final List availableFields = this.ultimateTicTacToe.getSubGame(fieldId).getAvailableFields();
+ this.subGameViewModels[fieldId].activate(availableFields);
+ }
+
+ public void onCellClicked(int cell) {
+ final int oldActiveGameId = this.ultimateTicTacToe.getActiveField();
+ final TicTacToePanelViewModel oldActiveGameViewModel = this.subGameViewModels[oldActiveGameId];
+ final TicTacToeGame oldActiveGame = this.ultimateTicTacToe.getSubGame(oldActiveGameId);
+ oldActiveGameViewModel.deactivate();
+
+ this.ultimateTicTacToe.doPlayerMove(cell);
+
+ if (oldActiveGame.isFinished()) {
+ final String winnerText = oldActiveGame.getState().displayText;
+ oldActiveGameViewModel.setFinishPanel(winnerText);
+ }
+
+ final String newText = oldActiveGame.getCells()[cell].displayText;
+ oldActiveGameViewModel.setButtonText(cell, newText);
+
+ prepareNextMove();
+ }
+
+ public TicTacToePanelViewModel getSubGameViewModel(int subGameId) {
+ return this.subGameViewModels[subGameId];
+ }
+
+ public void setGameResultCallback(Consumer gameResultCallback) {
+ this.gameResultCallback = gameResultCallback;
+ }
+}