import java.util.Scanner;

public class TicTacToe
{
	public static boolean winner = false;
	public static int counter = 0;
	public static boolean turn = true;

	public static void main(String [] args)
	{
		char [][] grid = {{'1','2','3'},{'4','5','6'},{'7','8','9'}};
		System.out.println("Welcome to Tic Tac Toe!");

		Scanner scn = new Scanner(System.in);

		System.out.println("Enter player 1's name:");
		String player1 = scn.next();

		System.out.println("Enter player 2's name:");
		String player2 = scn.next();

		print(grid);

		do{
			if (turn){
				System.out.println(player1+", pick your slot");
			} else {
				System.out.println(player2+", pick your slot");
			}

			int slot = scn.nextInt();
			play(grid, slot);
			print(grid);
			checkWinner(grid);

		} while (!winner && counter < 9);

		if (winner){

			if (turn){
				System.out.println(player1+" won!");
			} else {
				System.out.println(player2+" won!");
			}

		}

	}

	public static void print(char [][] grid)
	{
		System.out.println("-------------");
		for(int i = 0; i < grid.length; i++){
			System.out.print("| ");
			for(int j = 0; j < grid[i].length; j++){
				System.out.print(grid[i][j]+" | ");
			}
			System.out.println();
			System.out.println("-------------");
		}
	}

	public static void play(char [][] grid, int slot)
	{
		switch (slot) {

			case 1:
				if (grid [0][0] != '1'){
					System.out.println("Choose another slot");
				} else {
					if(turn){
						grid[0][0] = 'X';
					} else {
						grid[0][0] = 'O';
					}
					turn=!turn;
					counter++;
				}
				break;

			case 2:
				if (grid [0][1] != '2'){
					System.out.println("Choose another slot");
				} else {
					if(turn){
						grid[0][1] = 'X';
					} else {
						grid[0][1] = 'O';
					}
					turn=!turn;
					counter++;
				}
				break;

			case 3:
				if (grid [0][2] != '3'){
					System.out.println("Choose another slot");
				} else {
					if(turn){
						grid[0][2] = 'X';
					} else {
						grid[0][2] = 'O';
					}
					turn=!turn;
					counter++;
				}
				break;

			case 4:
				if (grid [1][0] != '4'){
					System.out.println("Choose another slot");
				} else {
					if(turn){
						grid[1][0] = 'X';
					} else {
						grid[1][0] = 'O';
					}
					turn=!turn;
					counter++;
				}
				break;

			case 5:
				if (grid [1][1] != '5'){
					System.out.println("Choose another slot");
				} else {
					if(turn){
						grid[1][1] = 'X';
					} else {
						grid[1][1] = 'O';
					}
					turn=!turn;
					counter++;
				}
				break;

			case 6:
				if (grida [1][2] != '6'){
					System.out.println("Choose another slot");
				} else {
					if(turn){
						grid[1][2] = 'X';
					} else {
						grid[1][2] = 'O';
					}
					turn=!turn;
					counter++;
				}
				break;

			case 7:
				if (grid [2][0] != '7'){
					System.out.println("Choose another slot");
				} else {
					if(turn){
						grid[2][0] = 'X';
					} else {
						grid[2][0] = 'O';
					}
					turn=!turn;
					counter++;
				}
				break;

			case 8:
				if (grid [2][1] != '8'){
					System.out.println("Choose another slot");
				} else {
					if(turn){
						grid[2][1] = 'X';
					} else {
						grid[2][1] = 'O';
					}
					turn=!turn;
					counter++;
				}
				break;

			case 9:
				if (grid [2][2] != '9'){
					System.out.println("Choose another slot");
				} else {
					if(turn){
						grid[2][2] = 'X';
					} else {
						grid[2][2] = 'O';
					}
					turn=!turn;
					counter++;
				}
				break;

			default:
				System.out.println("Invalid slot, choose another one");
		}
	}

	public static void checkWinner(char [][] grid)
	{
		if (grid[0][0] == grid[0][1] && grid[0][1] == grid[0][2]){
			winner = true;
		}
		else if (grid[1][0] == grid[1][1] && grid[1][1] == grid[1][2]){
			winner = true;
		}
		else if (grid[2][0] == grid[2][1] && grid[2][1] == grid[2][2]){
			winner = true;
		}
		else if (grid[0][0] == grid[1][0] && grid[1][0] == grid[2][0]){
			winner = true;
		}
		else if (grid[0][1] == grid[1][1] && grid[1][1] == grid[2][1]){
			winner = true;
		}
		else if (grid[0][2] == grid[1][2] && grid[1][2] == grid[2][2]){
			winner = true;
		}
		else if (grid[0][0] == grid[1][1] && grid[1][1] == grid[2][2]){
			winner = true;
		}
		else if (grid[0][2] == grid[1][1] && grid[1][1] == grid[2][0]){
			winner = true;
		}
		else {
			winner = false;
		}
	}


}