package PVE::CLI::pveceph;

use strict;
use warnings;

use Fcntl ':flock';
use File::Path;
use IO::File;
use JSON;
use Data::Dumper;
use LWP::UserAgent;

use PVE::SafeSyslog;
use PVE::Cluster;
use PVE::INotify;
use PVE::RPCEnvironment;
use PVE::Storage;
use PVE::Tools qw(run_command);
use PVE::JSONSchema qw(get_standard_option);
use PVE::CephTools;
use PVE::API2::Ceph;

use PVE::CLIHandler;

use base qw(PVE::CLIHandler);

my $nodename = PVE::INotify::nodename();

my $upid_exit = sub {
    my $upid = shift;
    my $status = PVE::Tools::upid_read_status($upid);
    exit($status eq 'OK' ? 0 : -1);
};

__PACKAGE__->register_method ({
    name => 'purge',
    path => 'purge',
    method => 'POST',
    description => "Destroy ceph related data and configuration files.",
    parameters => {
	additionalProperties => 0,
	properties => {
	},
    },
    returns => { type => 'null' },
    code => sub {
	my ($param) = @_;

	my $monstat;

	eval {
	    my $rados = PVE::RADOS->new();
	    my $monstat = $rados->mon_command({ prefix => 'mon_status' });
	};
	my $err = $@;

	die "detected running ceph services- unable to purge data\n"
	    if !$err;

	# fixme: this is dangerous - should we really support this function?
	PVE::CephTools::purge_all_ceph_files();

	return undef;
    }});

__PACKAGE__->register_method ({
    name => 'install',
    path => 'install',
    method => 'POST',
    description => "Install ceph related packages.",
    parameters => {
	additionalProperties => 0,
	properties => {
	    version => {
		type => 'string',
		#enum => ['dumpling', 'emperor', 'firefly', 'giant', 'hammer'],
		enum => ['hammer'], # only release for jessie
		optional => 1,
	    }
	},
    },
    returns => { type => 'null' },
    code => sub {
	my ($param) = @_;

	my $cephver = $param->{version} || 'hammer';

	local $ENV{DEBIAN_FRONTEND} = 'noninteractive';

	# use fixed devel repo for now, because there is no officila repo for jessie
	my $devrepo = undef;

	my $keyurl = $devrepo ?
	    "https://git.ceph.com/?p=ceph.git;a=blob_plain;f=keys/autobuild.asc" :
	    "https://git.ceph.com/?p=ceph.git;a=blob_plain;f=keys/release.asc";

	print "download and import ceph repository keys\n";

	# Note: wget on Debian wheezy cannot handle new ceph.com certificates, so
	# we use LWP::UserAgent
	#system("wget -q -O- '$keyurl'| apt-key add - 2>&1 >/dev/null") == 0 ||
	#die "unable to download ceph release key\n";

	my $tmp_key_file = "/tmp/ceph-release-keys.asc";
	my $ua = LWP::UserAgent->new(protocols_allowed => ['http', 'https'], timeout => 120);
	$ua->env_proxy;
	my $response = $ua->get($keyurl);
	if ($response->is_success) {
	    my $data = $response->decoded_content;
	    PVE::Tools::file_set_contents($tmp_key_file, $data);
        } else {
	    die "unable to download ceph release key: " . $response->status_line . "\n";
	}

	system("apt-key add $tmp_key_file 2>&1 >/dev/null") == 0 ||
	    die "unable to download ceph release key\n";

	unlink $tmp_key_file;

	my $source = $devrepo ?
	    "deb http://gitbuilder.ceph.com/ceph-deb-jessie-x86_64-basic/ref/$devrepo jessie main\n" :
	    "deb http://download.ceph.com/debian-$cephver jessie main\n";

	PVE::Tools::file_set_contents("/etc/apt/sources.list.d/ceph.list", $source);

	print "update available package list\n";
	eval { run_command(['apt-get', '-q', 'update'], outfunc => sub {}, errfunc => sub {}); };

	run_command(['apt-get', '-q', '--assume-yes', '--no-install-recommends',
		     '-o', 'Dpkg::Options::=--force-confnew',
		     'install', '--',
		     'ceph', 'ceph-common', 'gdisk']);

	return undef;
    }});

our $cmddef = {
    init => [ 'PVE::API2::Ceph', 'init', [], { node => $nodename } ],
    lspools => [ 'PVE::API2::Ceph', 'lspools', [], { node => $nodename }, sub {
	my $res = shift;

	printf("%-20s %10s %10s %20s\n", "Name", "size", "pg_num", "used");
	foreach my $p (sort {$a->{pool_name} cmp $b->{pool_name}} @$res) {
	    printf("%-20s %10d %10d %20d\n", $p->{pool_name}, $p->{size}, $p->{pg_num}, $p->{bytes_used});
	}
    }],
    createpool => [ 'PVE::API2::Ceph', 'createpool', ['name'], { node => $nodename }],
    destroypool => [ 'PVE::API2::Ceph', 'destroypool', ['name'], { node => $nodename } ],
    createosd => [ 'PVE::API2::CephOSD', 'createosd', ['dev'], { node => $nodename }, $upid_exit],
    destroyosd => [ 'PVE::API2::CephOSD', 'destroyosd', ['osdid'], { node => $nodename }, $upid_exit],
    createmon => [ 'PVE::API2::Ceph', 'createmon', [], { node => $nodename }, $upid_exit],
    destroymon => [ 'PVE::API2::Ceph', 'destroymon', ['monid'], { node => $nodename }, $upid_exit],
    start => [ 'PVE::API2::Ceph', 'start', ['service'], { node => $nodename }, $upid_exit],
    stop => [ 'PVE::API2::Ceph', 'stop', ['service'], { node => $nodename }, $upid_exit],
    install => [ __PACKAGE__, 'install', [] ],
    purge => [  __PACKAGE__, 'purge', [] ],
    status => [ 'PVE::API2::Ceph', 'status', [], { node => $nodename }, sub {
	my $res = shift;
	my $json = JSON->new->allow_nonref;
	print $json->pretty->encode($res) . "\n";
    }],
};

1;

__END__

=head1 NAME

pveceph - tool to manage ceph services on pve nodes

=head1 SYNOPSIS

=include synopsis

=head1 DESCRIPTION

Tool to manage ceph services on pve nodes.

=include pve_copyright