#!/usr/bin/perl

use strict;
use File::Basename;
use Data::Dumper;
use warnings;

my $path = dirname($0);

my %conf = (
	'jimc'       => "jimc.jnlp",
	'regions'    => "$path/regions",
	'deployconf' => "$ENV{HOME}/.jimc",
	'defaults'   => "$path/defaults",
);

my $regions_list = list_regions();
my $selected_region = select_region($regions_list);
print "REGION: $selected_region\n";
deploy_region($selected_region);
start_jimc($selected_region);

print "NOTE: Close JIMC before saving the region!\n";
print "Do you want to save the region? [y/N] ";
my $sel = <STDIN>;
if ( defined $sel && $sel =~/[yY]/ ) {
	save_region($selected_region);
	print "Region $selected_region saved\n";
}
print "Done\n";



sub list_regions {
	my %r;
	opendir(DIR,$conf{regions}) || die "directory $conf{regions} does not exist";
	while(readdir DIR) {
		next if /^\./;
		my $dir = $_;
		opendir(DIR2,$conf{regions}.'/'.$dir) || next;
		while(readdir DIR2) {
			next if /^\./;
			my $file = $_;
			push @{$r{$dir}}, $file;
		}
		closedir(DIR2);
	}
	closedir(DIR);
	return \%r;
}

sub select_region {
	my($regions) = @_;

	my $select;
	my $region;

	while(1) {

		print "=============================================================================\n";
		print "==                        SELECT REGION TO START                           ==\n";
		print "=============================================================================\n";
		my @idx;
		foreach my $r ( sort keys %{$regions} ) {
			push @idx, $r;
			printf("== %s) %s\n", scalar(@idx), $r);
		}
		print "=============================================================================\n";
		print "Which region do you want to start? : ";
		my $select = <STDIN>;
		chomp $select;

		if ( defined $select && $select =~ /^\d+$/ && defined $idx[$select-1] ) {
			$region = $idx[$select-1];
			last;
		}
	}

	return $region;
}

sub deploy_region {
	my($region) = @_;

	system("rm -f $conf{deployconf}/*");
	system("cp $conf{defaults}/* $conf{deployconf}/");
	system("cp $conf{regions}/$region/* $conf{deployconf}/");
}

sub start_jimc {
	my($region) = @_;

	my $jimc = "$conf{regions}/$region/$conf{jimc}" ?
		"$conf{regions}/$region/$conf{jimc}" : "$conf{defaults}/$conf{jimc}";

	system("open $jimc");
}

sub save_region {
	my($region) = @_;

	opendir(CONF,$conf{deployconf}) || die "failed to open jimc config dir $conf{deployconf}";
	while(readdir CONF) {
		next if /^\./;
		my $file = $_;

		if ( -r "$conf{regions}/$region/$file" ) {
			print "Copying $file to region $region\n";
			system("cp $conf{deployconf}/$file $conf{regions}/$region/$file");
		}
	}
	closedir(CONF);
}

sub file_ts {
	my($file) = @_;

	if ( -r $file ) {
		my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks) = stat($file);
		return $mtime > $ctime ? $mtime : $ctime;
	}
	return 0;
}