#!/usr/bin/perl
use strict;
use warnings;

use UI::Dialog;
use Term::ReadKey;
use Term::ANSIScreen qw(cls);

my $FileEditor = "/bin/nano";
my $InitDName = "/etc/init.d/minetest";
my $MINETESTDIR = "/root/minetest";
my $BackupCommand = "/root/MineBackup/minebackup.pl";
my $PagerCommand = "/usr/bin/less";
my $Logfile = "/root/minetest/minetest.log";
my $PlayersDir = "/var/games/minetest-server/.minetest/worlds/world/players";

###################################################
# No changes below here
###################################################

my $MySettings = "$ENV{'HOME'}/.mmcrc";

my $MMC_ver = "1.2.0";
my $Record = "false";	# Are results saved?
my $TempDir = "/tmp";
my $RobotName = "";
my $BotVersion = "";
my $UserName = "";
my $ServerStatus = "foo";

my $d = new UI::Dialog ( backtitle => "Minetest Management Console v$MMC_ver", height => 20, width => 65, listheight => 5,
	order => [ 'ascii', 'cdialog', 'xdialog' ]);

my $windowtitle = "Welcome to the Minetest Management Console!";
my $enjoyedtitle = "We hope you enjoyed MMC!";
my $introtext =
"This is the Minetest Management Console, a utility for Minetest operators
to manage their servers from a text GUI rather than the command line.";

$d->msgbox( title => $windowtitle, text => $introtext );

if (($d->state() eq "ESC") || ($d->state() eq "CANCEL"))
{
	exit 0;
}

# Check for config file
if (-f $MySettings)
{
	# Read in settings
	open (my $FH, "<", $MySettings) or die "Could not read default file '$MySettings' $!";
	while (<$FH>)
	{
		chop();
		my ($Command, $Setting) = split(/=/, $_);
		if ($Command eq "fileeditor")
		{
			$FileEditor = $Setting;
		}
		if ($Command eq "initdname")
		{
			$InitDName = $Setting;
		}
		if ($Command eq "minetestdir")
		{
			$MINETESTDIR = $Setting;
		}
		if ($Command eq "backupcommand")
		{
			$BackupCommand = $Setting;
		}
		if ($Command eq "pagercommand")
		{
			$PagerCommand = $Setting;
		}
		if ($Command eq "logfile")
		{
			$Logfile = $Setting;
		}
		if ($Command eq "playerdir")
		{
			$PlayersDir = $Setting;
		}
	}
	close($FH);
}
else
{
	# Store defaults
	open (my $FH, ">", $MySettings) or die "Could not create default file '$MySettings' $!";
	print $FH "fileeditor=/bin/nano\n";
	print $FH "initdname=/etc/init.d/minetest\n";
	print $FH "minetestdir=/root/minetest\n";
	print $FH "backupcommand=/root/MineBackup/minebackup.pl\n";
	print $FH "pagercommand=/usr/bin/less\n";
	print $FH "logfile=/root/minetest/minetest.log\n";
	print $FH "playerdir=/var/games/minetest-server/.minetest/worlds/world/players\n";
	close($FH);
}

my $menuselection = "";


sub CheckServerStatus
{
	my $running=`ps ax|grep minetestserver|grep -v grep`;
	if ($running ne "")
	{
		$ServerStatus = "Running";
	}
	else
	{
		$ServerStatus = "Stopped";
	}

}

sub MainMenu
{
	my $WantRespawn="ON";
	CheckServerStatus();
	if (-f "$MINETESTDIR/nostart")
	{
		$WantRespawn="OFF";
	}

	$menuselection = $d->menu( title => "Main Menu", text => "Server is $ServerStatus and respawn is $WantRespawn - Select one:",
                            list => [ '1', 'Start Server',
                                      '2', 'Stop Server',
                                      '3', 'Server Console',
                                      '4', 'Turn Off Respawn',
                                      '5', 'Turn Respawn On',
                                      '6', 'Edit World Cfg',
                                      '7', 'Edit minetest.conf',
                                      '8', 'Run Backup',
                                      '9', 'View Log',
                                      '10', 'View Players',
                                      'q', 'Quit MMC' ] );
}

while (-1)
{
	MainMenu();
	if (($menuselection eq "CANCEL") || ($menuselection eq "ESC") || ($menuselection eq "") || ($menuselection eq "q") || ($menuselection eq "Q"))
	{
		$d->msgbox( title => $enjoyedtitle, text => "Thanks for using MMC..." );
		exit 0;
	}
	if ($menuselection eq "1")
	{
		system("$InitDName start");
	}
	elsif ($menuselection eq "2")
	{
		if ($d->yesno( text => "Confirm stopping the server", text => "Are you sure you want to shut down the server?" ))
		{
			system("$InitDName stop");
			sleep(5);
		}
	}
	elsif ($menuselection eq "3")
	{
		$d->msgbox( text => "To exit the minetest console and return to MMC press CTRL-A CTRL-D" );
		system("screen -r");
	}
	elsif ($menuselection eq "4")
	{
		# Turn off respawn
		system("touch $MINETESTDIR/nostart");
	}
	elsif ($menuselection eq "5")
	{
		# Turn respawn back on
		if (-f "$MINETESTDIR/nostart")
		{
			unlink("$MINETESTDIR/nostart");
		}
	}
	elsif ($menuselection eq "6")
	{
		# Edit world.mt file
		system("$FileEditor $MINETESTDIR/worlds/world/world.mt");
	}
	elsif ($menuselection eq "7")
	{
		# Edit minetest.conf file
		system("$FileEditor $MINETESTDIR/minetest.conf");
	}
	elsif ($menuselection eq "8")
	{
		# Run a backup
		system("clear");
		system("$BackupCommand");
		print "Press Enter To Continue";
		my $entered = <STDIN>;
	}
	elsif ($menuselection eq "9")
	{
		# View log file
		system("$PagerCommand $Logfile");
	}
	elsif ($menuselection eq "10")
	{
		# View users
		system("clear");
		system("ls $PlayersDir");
		print "Press Enter To Continue";
		my $entered = <STDIN>;
	}
}

exit 0;