package cubacuba;

import java.util.$*$;

import java.util.concurrent.atomic.AtomicInteger;

class Player $\{$

private final AtomicInteger playerIDCounter $=$ new AtomicInteger$(1)$;

String playerID;

String playerName;

int score;

String gameID;

Player next;

Player$($String playerName, String gameID$)\{$

this.playerID $=$ generatePlayerID$()$;

this.playerName $=$ playerName;

this.score $=0$;

this.gameID $=$ gameID;

this.next $=$ null;

$\}$

private String generatePlayerID$()\{$

return $"$P$"+$ playerIDCounter.getAndIncrement$()$;

$\}$

public String getPlayerID$()\{$

return playerID;

$\}$

public void setPlayerName$($String newName$)\{$

this.playerName $=$ newName;

$\}$

public void setScore$($int newScore$)\{$

this.score $=$ newScore;

$\}$

public int getScore$()\{$

return score;

$\}$

public String getGameID$()\{$

return gameID;

$\}$

$\}$

class Game $\{$

String gameID;

String gameName;

Player head;

Game$($String gameName$)\{$

this.gameID $=$ generateGameID$($gameName$)$;

this.gameName $=$ gameName;

this.head $=$ null;

$\}$

private String generateGameID$($String gameName$)\{$

return gameName.substring$(0,3).$toUpperCase$()$;

$\}$

public String getGameID$()\{$

return gameID;

$\}$

public void addPlayer$($Player player$)\{$

player.next $=$ head;

head $=$ player;

$\}$

public void removePlayer$($String playerID$)\{$

if $($head $==$ null$)\{$

return;

$\}$

if $($head$.$getPlayerID$().$equals$($playerID$))\{$

head $=$ head.next;

return;

$\}$

Player current $=$ head;

Player previous $=$ null;

while $($current $!=$ null && $!$current.getPlayerID$().$equals$($playerID$))\{$

previous $=$ current;

current $=$ current.next;

$\}$

if $($current $!=$ null$)\{$

previous.next $=$ current.next;

$\}$

$\}$

public Player findPlayer$($String playerID$)\{$

Player current $=$ head;

while $($current $!=$ null && $!$current.getPlayerID$().$equals$($playerID$))\{$

current $=$ current.next;

$\}$

return current;

$\}$

$\}$

public class GameScoreManagementSystem $\{$

static List games $=$ new ArrayList$<>()$;

private static Scanner scanner $=$ new Scanner$($System$.$in$)$;

public static void main$($String$[]$ args$)\{$

initializeGames$()$;

char ch;

do $\{$

printMainMenu$()$;

ch $=$ scanner.next$().$toUpperCase$().$charAt$(0)$;

switch $($ch$)\{$

case $\text{'}1\text{'}$:

displayStandingsMenu$()$;

break;

case $\text{'}2\text{'}$:

editPlayerDataMenu$()$;

break;

case $\text{'}$X$\text{'}$:

System.out.println$("$

Exiting Game Score Management System"$)$;

break;

default:

System.out.println$("$

Invalid entry. Please select $1,2,$ or X

$")$;

$\}$

$\}$ while $($ch $!=\text{'}$X$\text{'})$;

$\}$

private static void initializeGames$()\{$

games.add$($new Game$("$Badminton$"))$;

games.add$($new Game$("$Football$"))$;

games.add$($new Game$("$Volleyball$"))$;

$\}$

private static void printMainMenu$()\{$

System.out.println$("$

$[-------$Game Score Management System$-------]")$;

System.out.println$("1-$ Display Standings"$)$;

System.out.println$("2-$ Edit Player Data"$)$;

System.out.println$("$X $-$ Exit"$)$;

System.out.print$("$Enter your choice: $")$;

$\}$

private static void displayStandingsMenu$()\{$

if $($games$.$isEmpty$())\{$

System.out.println$("$

No games available. Please add games first."$)$;

return;

$\}$

System.out.println$("$

$[-----$Display Standings Menu$-----]")$;

for $($int i $=0$; i $<$ games.size$()$; i$++)\{$

System.out.println$(($i $+1)+"-"+$ games.get$($i$).$gameName$)$;

$\}$

System.out.println$("$X $-$ Back to Main Menu"$)$;

System.out.print$("$Enter your choice: $")$;

char gameChoice $=$ scanner.next$().$toUpperCase$().$charAt$(0)$;

if $($gameChoice $==\text{'}$X$\text{'})\{$

System.out.println$("$

Returning to Main Menu"$)$;

$\}$ else if $($gameChoice $>=\text{'}1\text{'}$ && gameChoice $<=\text{'}9\text{'})\{$

int gameIndex $=$ Character.getNumericValue$($gameChoice$)-1$;

if $($gameIndex $>=0$ && gameIndex $<$ games.size$())\{$

displayGameStandings$($games$.$get$($gameIndex$))$;

$\}$ else $\{$

System.out.println$("$

Invalid entry. Please select a valid game or X

$")$;

$\}$

$\}$ else $\{$

System.out.println$("$

Invalid entry. Please select a valid game or X

$")$;

$\}$

$\}$

private static void displayGameStandings$($Game game$)\{$

if $($game$.$head $==$ null$)\{$

System.out.println$("$

The player list for $"+$ game.gameName $+"$ is empty.

$")$;

return;

$\}$

Player current $=$ game.head;