#!/usr/bin/perl -w
# ticTacToe.pl

use warnings;
use strict;

my @pieces = (" ") x 9; # value of square. NULL if empty x for x and o for o.
my $input;
my $outcome; # 1 for win, 2 for loss. 3 for Tie.
my $playerPiece;
my $aiPiece;
my @markers = ("o", "x");
my $totalMarkers = @markers;

sub updateScreen{ # To update screen after each move.
    print " $pieces[6] | $pieces[7] | $pieces[8]\n";
    print "-----------\n";
    print " $pieces[3] | $pieces[4] | $pieces[5]\n";
    print "-----------\n";
    print " $pieces[0] | $pieces[1] | $pieces[2]\n";
}

sub helpGame{ 
    
}

system("reset"); # reset screen.
print "Welcome to my Tic Tac Toe Game!\n";
print "I hope you like it and have fun\n";
print "BTW, you can't choose who you are...\n";
print "Type quit to quit program. Help for help.\n";
$playerPiece = $markers[rand $totalMarkers]# randomly choose x or o for player.
if($playerPiece eq "x"){
    $aiPiece = "o";
} else {
    $aiPiece = "x";
};

print "The player is = $playerPiece\n";
print "the Ai is = $aiPiece\n";

while($outcome == 0){ # main processing loop
    print "\n";
    &updateScreen;
    print "\n";
    $input = <STDIN>;
    if($input =~ /[^1-9]/){ # Used to check for input words.
        if($input eq("quit" || "exit")){ # Checks what word is.
            print "\n";
            print "Bye! Hope you liked it!\n";
            print "\n";
            exit;
        } else if($input eq "help") {
            &helpGame;
            redo;
        } else {
            print "\n";
            print "That is invalid input...\n";
            redo;           
        }
    }
    if($input =~ /[1-9]/){
         print "\n";       
    }
}