Nim

import java.util.Random;
import java.util.Scanner;


public class Nim {


    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        Random r = new Random();
        int pA = 5, pB = 5, pC = 5, turn = 1, pS, n, x;
        String p1, p2, s1 = null, pile, m1, m2, m3;
        //strings used more than once
        m1 = "You must choose at least one and no more than what the stack has";
        m2 = "Selected pile has no more stacks";
        m3 = "Try again: ";
        System.out.println("Player 1 enter your name ");
        p1 = sc.next();
        System.out.println("Player 2 enter your name or type \"computer\" to play against the computer");
        p2 = sc.next();

        while ((pA + pB + pC) > 0) {
            n = 0;
            System.out.print("A: ");
            while (n < pA) {
                System.out.print("*");
                n++;
            }
            n = 0;
            System.out.print("\nB: ");
            while (n < pB) {
                System.out.print("*");
                n++;
            }
            n = 0;
            System.out.print("\nC: ");
            while (n < pC) {
                System.out.print("*");
                n++;
            }
            //turn checker
            if (turn == 1) {
                s1 = p1;
                turn--;
            } else if (turn == 0 && (p2.equals("computer"))) {
                s1 = p1;
                turn++;
            } else {
                s1 = p2;
                turn++;
            }
            System.out.print("\n" + s1 + " choose pile: ");
            pile = sc.next();
            //checks input to see if "A", "B" or "C" were selected
            while (("A".compareTo(pile) + 3 <= 0)||("A".compareTo(pile)+3>3)) {
                System.out.print("Select a valid pile: ");
                pile = sc.next();
            }
            //checks whether the pile is empty or not
            while ((pile.equals("A") && pA == 0) || (pile.equals("B") && pB == 0) || (pile.equals("C") && pC == 0)) {
                System.out.println(m2);
                System.out.print(m3);
                pile = sc.next();
            }
            System.out.print("How many to take from pile: ");
            pS = sc.nextInt();
            //cheat protection
            while (pile.equals("A") && (pS <= 0 || pS > pA)) {
                System.out.println(m1);
                System.out.print(m3);
                pS = sc.nextInt();
            }
            while (pile.equals("B") && (pS <= 0 || pS > pB)) {
                System.out.println(m1);
                System.out.print(m3);
                pS = sc.nextInt();
            }
            while (pile.equals("C") && (pS <= 0 || pS > pC)) {
                System.out.println(m1);
                System.out.print(m3);
                pS = sc.nextInt();
            }
            if (pile.equals("A")) {
                pA -= pS;
            } else if (pile.equals("B")) {
                pB -= pS;
            } else if (pile.equals("C")) {
                pC -= pS;
            }
            //no idea how to make this shorter. Detects when theres 1 stack left to declare a winner before the computer's turn
            if ((pA == 1 && pB == 0 && pC == 0) || (pA == 0 && pB == 1 && pC == 0) || (pA == 0 && pB == 0 && pC == 1)) {
                if (turn == 1 && (p2.equals("computer"))) {
                    System.out.println("the computer lost, its pretty dumb.");
                } else if (turn == 1) {
                    s1 = p1;
                    System.out.println(s1 + " there is only one left, you lose");
                } else {
                    s1 = p2;
                    System.out.println(s1 + " there is only one left, you lose");
                }
                return;
            }
            //computer opponent, i dont know whats going on in here anymore
            if (p2.equals("computer")) {
                x = 1 + r.nextInt(3);
                if (x == 1 && pA > 0) {
                    x = 1 + r.nextInt(5);
                    while (x > pA) {
                        x = 1 + r.nextInt(5);
                    }
                    System.out.println("the computer took " + x + " from pile A");
                    pA -= x;

                } else if (x == 2 && pB > 0) {
                    x = 1 + r.nextInt(5);
                    while (x > pB) {
                        x = 1 + r.nextInt(5);
                    }
                    System.out.println("the computer took " + x + " from pile B");
                    pB -= x;
                } else if (x == 3 && pC > 0) {
                    x = 1 + r.nextInt(5);
                    while (x > pC) {
                        x = 1 + r.nextInt(5);
                    }
                    System.out.println("the computer took " + x + " from pile C");
                    pC -= x;

                }
                //the more i read, the more confused i get but it works
                if (x == 1 && pA == 0) {
                    if (pB > 0) {
                        x = 1 + r.nextInt(5);
                        while (x > pB) {
                            x = 1 + r.nextInt(5);
                        }
                        System.out.println("the computer took " + x + " from pile B");
                        pB -= x;
                    } else {
                        x = 1 + r.nextInt(5);
                        while (x > pC) {
                            x = 1 + r.nextInt(5);
                        }
                        System.out.println("the computer took " + x + " from pile C");
                        pC -= x;
                    }
                } else if (x == 2 && pB == 0) {
                    if (pA > 0) {
                        x = 1 + r.nextInt(5);
                        while (x > pB) {
                            x = 1 + r.nextInt(5);
                        }
                        System.out.println("the computer took " + x + " from pile A");
                        pA -= x;
                    } else {
                        x = 1 + r.nextInt(5);
                        while (x > pC) {
                            x = 1 + r.nextInt(5);
                        }
                        System.out.println("the computer took " + x + " from pile C");
                        pC -= x;
                    }
                } else if (x == 3 && pC == 0) {
                    if (pA > 0) {
                        x = 1 + r.nextInt(5);
                        while (x > pA) {
                            x = 1 + r.nextInt(5);
                        }
                        System.out.println("the computer took " + x + " from pile A");
                        pA -= x;
                    } else {
                        x = 1 + r.nextInt(5);
                        while (x > pB) {
                            x = 1 + r.nextInt(5);
                        }
                        System.out.println("the computer took " + x + " from pile B");
                        pB -= x;
                    }
                }
            }
            //computer player doesnt break any rules but doesnt really know how to play
            if (pA==0&&pB==0&&pC==0){
                System.out.println("The computer probably lost by taking all remaining uhh things....");
                return;
            }
            //Detects when theres 1 stack left to declare a winner again at the end of the computer's turn in case it wins!
            if ((pA == 1 && pB == 0 && pC == 0) || (pA == 0 && pB == 1 && pC == 0) || (pA == 0 && pB == 0 && pC == 1)) {
                if (turn == 1 && (p2.equals("computer"))) {
                    System.out.println("the computer lost, its pretty dumb.");
                } else if (turn == 1) {
                    s1 = p1;
                    System.out.println(s1 + " there is only one left, you lose");
                } else {
                    s1 = p2;
                    System.out.println(s1 + " there is only one left, you lose");
                }
                return;
            }
        }

    }
}