#!/usr/bin/perl -w
use strict;
use warnings;
use POSIX;
use Net::WebSocket::Server;
use JSON;

use Data::Dumper;

#########################Game Logic starts here##########################

my %sessions = ();

sub generateSession {
	my $newSession = shift;
	unless (defined $newSession) { $newSession = time; }
	if ( grep( /$newSession/, keys %sessions ) ) {
		generateSession();
	} else {
		print "Adding session ".$newSession." to database\n";
		$sessions{$newSession} = ();
		$sessions{$newSession}{"id"} = $newSession;
		$sessions{$newSession}{"users"} = ();
		$sessions{$newSession}{"decks"} = ();
		$sessions{$newSession}{"pools"} = ();

	}
	return $newSession;
}

sub generateDeck {
	$DDF = from_json(shift);
# Add proper handling for reading of DDFs
}

sub shuffleDeck {
	my @deck = @_;
	my $index = 0;
	for (@deck) {
		my $swapCardIndex = floor(rand() * @deck);
		my $swapCard = @deck[$swapCardIndex];
		@deck[$swapCardIndex] = $_;
		$deck[$index] = $swapCard;
		$index++;
	}
	return @deck;
}

sub addUser {
	my ($sessionID,$userID) = @_;
}

sub delUser {
	my ($sessionID,$userID) = @_;
}

sub addCards {
	my ($sessionID,$deckID, $DDF) = @_;
}

sub addDeck {
	my ($sessionID,$deckID) = @_;
	my %newDeck = {
		cards => []
	}
	$sessions{$sessionID}{"decks"}{$deckID} = %newDeck;
}

sub delDeck {
	my ($sessionID,$deckID) = @_;
	$sessions{$sessionID}{"decks"}{$deckID} = undef;
}

sub addPool {}

sub delPool {}



########################Game Logic ends here#############################

#########################Server Logic below##############################

my $origin = 'ws://localhost';

sub joinSession {
}

my $server = Net::WebSocket::Server->new(
    listen => 8080,
    on_connect => sub {
        my ($serv, $conn) = @_;
        $conn->on(
	    handshake => sub {
	    	my ($conn,$handshake) = @_;
		$conn->{"initHand"} = $handshake;
	    },
            ready => sub {
                my ($conn) = @_;
		#strip the / off of the resource request and then assign just the request to $session
		#Check for game ID, if none generate one and send it then disconnect.
		#Check for user ID, if none $conn->disconnect("noid",generateUser());
            },
            utf8 => sub {
                my ($conn, $msg) = @_;
		my $sessionID = $conn->{"currentSession"}{"id"};
		my $messageData = "";
		eval { $messageData = from_json($msg) };
		if ($@) { $conn->send_utf8('{"error":1, "message":"ERROR: Invalid json"}'); return 0;}
            },
	    disconnect => sub {
		my ($conn, $code, $reason) = @_;
		}
	    }
        );
    },
);

$server->start;