#!/usr/bin/perl
# 
# This program boots a server. It can be called as either a job from the webui or directly from another 
# program or a terminal.
# 
# Exit codes;
# 0 = Normal exit.
# 1 = No database connection.
# 
# TODO: 
# - Add support for boot ordering.
# - Check which node we want to put on and set a location constraint to prefer that node before calling pcs.
# 

use strict;
use warnings;
use Anvil::Tools;

my $THIS_FILE           =  ($0 =~ /^.*\/(.*)$/)[0];
my $running_directory   =  ($0 =~ /^(.*?)\/$THIS_FILE$/)[0];
if (($running_directory =~ /^\./) && ($ENV{PWD}))
{
	$running_directory =~ s/^\./$ENV{PWD}/;
}

# Turn off buffering so that the pinwheel will display while waiting for the SSH call(s) to complete.
$| = 1;

my $anvil = Anvil::Tools->new();

$anvil->Get->switches({list => ["job-uuid", "no-wait", "server", "server-uuid", "wait"], man => $THIS_FILE});
$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => $anvil->data->{switches}});
$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, secure => 0, key => "log_0115", variables => { program => $THIS_FILE }});

$anvil->Database->connect();
$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 3, secure => 0, key => "log_0132"});
if (not $anvil->data->{sys}{database}{connections})
{
	# No databases, update the job, sleep for a bit and then exit. The daemon will pick it up and try 
	# again after we exit.
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, priority => "err", key => "error_0075"});
	sleep 10;
	$anvil->nice_exit({exit_code => 1});
}

if ($anvil->data->{switches}{'job-uuid'})
{
	# Load the job data.
	$anvil->Job->clear();
	$anvil->Job->get_job_details();
	$anvil->Job->update_progress({
		progress         => 1,
		job_picked_up_by => $$, 
		job_picked_up_at => time, 
		message          => "job_0282", 
	});
	
	# Pull out the job data.
	foreach my $line (split/\n/, $anvil->data->{jobs}{job_data})
	{
		if ($line =~ /server=(.*?)$/)
		{
			$anvil->data->{switches}{'server'} = $1;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				'switches::server' => $anvil->data->{switches}{'server'},
			}});
		}
		if ($line =~ /server-uuid=(.*?)$/)
		{
			$anvil->data->{switches}{'server-uuid'} = $1;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				'switches::server-uuid' => $anvil->data->{switches}{'server-uuid'},
			}});
		}
	}
}

# Now check that we have a server. If it's a server_uuid, read the server name.
if ($anvil->data->{switches}{'server-uuid'})
{
	# Convert the server_uuid to a server_name.
	my $query = "SELECT server_name FROM servers WHERE server_uuid = ".$anvil->Database->quote($anvil->data->{switches}{'server-uuid'}).";";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
	
	my $server_name = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__})->[0]->[0];
	   $server_name = "" if not defined $server_name;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { server_name => $server_name }});
	
	if ($server_name)
	{
		$anvil->data->{switches}{'server'} = $server_name;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			'switches::server' => $anvil->data->{switches}{'server'},
		}});
	}
	else
	{
		# Invalid server UUID. 
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, priority => "err", key => "error_0269", variables => {
			server_uuid => $anvil->data->{switches}{'server-uuid'}, 
		}});
		$anvil->Job->update_progress({progress => 100, message => "error_0269,!!server_uuid!".$anvil->data->{switches}{'server-uuid'}."!!"});
		$anvil->nice_exit({exit_code => 1});
	}
}

# Do we have a server name?
if (not $anvil->data->{switches}{'server'})
{
	# Unable to proceed.
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, priority => "err", key => "error_0257"});
	$anvil->Job->update_progress({progress => 100, message => "error_0257"});
	$anvil->nice_exit({exit_code => 1});
}

# Are we a node or DR host?
$anvil->data->{sys}{host_type} = $anvil->Get->host_type();
if (($anvil->data->{sys}{host_type} ne "node") && ($anvil->data->{sys}{host_type} ne "dr"))
{
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, priority => "err", key => "error_0258"});
	$anvil->Job->update_progress({progress => 100, message => "error_0258"});
	$anvil->nice_exit({exit_code => 1});
}

### TODO: Add DR support. For now, this only works on Nodes in a cluster
if ($anvil->data->{sys}{host_type} eq "dr")
{
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, priority => "err", key => "error_0265"});
	$anvil->Job->update_progress({progress => 100, message => "error_0265"});
	$anvil->nice_exit({exit_code => 1});
}

# Make sure that we're in an Anvil! system.
$anvil->data->{sys}{anvil_uuid} = $anvil->Cluster->get_anvil_uuid();
if (not $anvil->data->{sys}{anvil_uuid})
{
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, priority => "err", key => "error_0260"});
	$anvil->Job->update_progress({progress => 100, message => "error_0260"});
	$anvil->nice_exit({exit_code => 1});
}

# Wait for pacemaker to be up.
wait_for_pacemaker($anvil);

# If 'server' is 'all', boot all servers.
if (lc($anvil->data->{switches}{'server'}) eq "all")
{
	boot_all_servers($anvil);
}
else
{
	my $wait = $anvil->data->{switches}{'no-wait'} ? 0 : 1;
	boot_server($anvil, $anvil->data->{switches}{'server'}, $wait, 50);
}

$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "job_0281"});
$anvil->Job->update_progress({progress => 100, message => "job_0281"});

$anvil->nice_exit({exit_code => 0});


#############################################################################################################
# Functions                                                                                                 #
#############################################################################################################

sub wait_for_pacemaker
{
	my ($anvil) = @_;

	# Boot the server using pcs, but of course, wait for the node to be up.
	my $waiting = 1;
	while($waiting)
	{
		my $problem = $anvil->Cluster->parse_cib({debug => 3});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { problem => $problem }});
		if (not $problem)
		{
			my $node_name = $anvil->data->{cib}{parsed}{'local'}{name};
			my $ready     = $anvil->data->{cib}{parsed}{data}{node}{$node_name}{node_state}{ready};
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { ready => $ready }});
			if ($ready)
			{
				# We're good. 
				$waiting = 0;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { waiting => $waiting }});
				$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "job_0279"});
				$anvil->Job->update_progress({progress => 15, message => "job_0279"});
			}
			else
			{
				# Node isn't ready yet.
				$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "job_0278"});
				$anvil->Job->update_progress({progress => 10, message => "job_0278"});
			}
		}
		else
		{
			# Cluster hasn't started.
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "job_0277"});
			$anvil->Job->update_progress({progress => 5, message => "job_0277"});
		}
		if ($waiting)
		{
			sleep 10;
		}
	}
	
	return(0);
}

sub boot_server
{
	my ($anvil, $server, $wait, $progress) = @_;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		server   => $server,
		'wait'   => $wait, 
		progress => $progress, 
	}});
	
	# Verify that the server's XML file exists.
	my $definition_file = $anvil->data->{path}{directories}{shared}{definitions}."/".$server.".xml";
	if (not -e $definition_file)
	{
		# No XML, no boot
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, priority => "err", key => "error_0259", variables => { definition_file => $definition_file }});
		$anvil->Job->update_progress({progress => 100, message => "error_0259,!!definition_file!".$definition_file."!!"});
		$anvil->nice_exit({exit_code => 1});
	}
	
	if (not exists $anvil->data->{cib}{parsed}{data}{server}{$server})
	{
		# XML exists, but it's not in the cluster.
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, priority => "err", key => "error_0261", variables => { 
			server          => $server, 
			definition_file => $definition_file,
		}});
		$anvil->Job->update_progress({progress => 100, message => "error_0261,!!definition_file!".$definition_file."!!,!!server!".$server."!!"});
		$anvil->nice_exit({exit_code => 1});
	}
	
	my $status = $anvil->data->{cib}{parsed}{data}{server}{$server}{status};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { status => $status }});
	if ($status ne "off")
	{
		# It's not off, can't boot it. 
		if ($status eq "running")
		{
			# Some other state.
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0548", variables => { server => $server }});
			$anvil->Job->update_progress({progress => $progress, message => "log_0548,!!server!".$server."!!"});
			return(0);
		}
		else
		{
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, priority => "err", key => "error_0262", variables => { 
				server => $server, 
				status => $status,
			}});
			$anvil->Job->update_progress({progress => 100, message => "error_0262,!!status!".$status."!!,!!server!".$server."!!"});
			$anvil->nice_exit({exit_code => 1});
		}
	}
	
	# Now boot.
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "job_0288", variables => { server => $server }});
	$anvil->Job->update_progress({progress => $progress, message => "job_0288,!!server!".$server."!!"});
	my $problem = $anvil->Cluster->boot_server({
		debug  => 2, 
		server => $server, 
		'wait' => $wait,
	});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { problem => $problem }});
	if ($problem)
	{
		# Failed, abort.
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, priority => "err", key => "error_0267", variables => { server => $server }});
		$anvil->Job->update_progress({progress => 100, message => "error_0267,!!server!".$server."!!"});
		$anvil->nice_exit({exit_code => 1});
	}
	else
	{
		if ($wait)
		{
			# Booted!
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "job_0280", variables => { server => $server }});
			$anvil->Job->update_progress({progress => $progress, message => "job_0280,!!server!".$server."!!"});
		}
		else
		{
			# Boot requested
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "job_0287", variables => { server => $server }});
			$anvil->Job->update_progress({progress => $progress, message => "job_0287,!!server!".$server."!!"});
		}
	}
	
	return(0);
}

sub boot_all_servers
{
	my ($anvil) = @_;
	
	### TODO: Manage the boot order here.
	# We top out at 90, bottom is 20. 
	my $server_count = keys %{$anvil->data->{cib}{parsed}{data}{server}};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { server_count => $server_count }});
	if (not $server_count)
	{
		# No servers exist yet.
		return(0);
	}
	
	# Load information about the servers on this Anvil!.
	my $anvil_uuid = $anvil->data->{sys}{anvil_uuid};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { anvil_uuid => $anvil_uuid }});
	
	my $increment = int(70 / $server_count);
	my $percent   = 15;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { increment => $increment }});
	
	# Loop until all are processed.
	my $waiting    = 1;
	my $start_time = time;
	while($waiting)
	{
		# Get a list of servers now.
		$anvil->Database->get_servers({debug => 3});
		
		# This will get set to 0 if any servers are waiting to boot.
		my $all_processed = 1;
		foreach my $server_name (sort {$a cmp $b} keys %{$anvil->data->{cib}{parsed}{data}{server}})
		{
			my $status      = $anvil->data->{cib}{parsed}{data}{server}{$server_name}{status};
			my $host_name   = $anvil->data->{cib}{parsed}{data}{server}{$server_name}{host_name};
			my $role        = $anvil->data->{cib}{parsed}{data}{server}{$server_name}{role};
			my $active      = $anvil->data->{cib}{parsed}{data}{server}{$server_name}{active};
			my $server_uuid = $anvil->data->{servers}{anvil_uuid}{$anvil_uuid}{server_name}{$server_name}{server_uuid};
			my $boot_delay  = $anvil->data->{servers}{server_uuid}{$server_uuid}{server_start_delay};
			   $boot_delay  = 0 if not $boot_delay;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				's1:server_name' => $server_name,
				's2:status'      => $status,
				's2:host_name'   => $host_name,
				's4:role'        => $role,
				's5:active'      => $active, 
				's6:server_uuid' => $server_uuid, 
				's7:boot_delay'  => $boot_delay, 
			}});
			
			if (not exists $anvil->data->{boot_server}{$server_name}{processed})
			{
				# This will get set to the boot time once we actually start it. This will let
				# us time when servers that boot after this server can boot.
				$anvil->data->{boot_server}{$server_name}{processed} = 0;
			}
			elsif ($anvil->data->{boot_server}{$server_name}{processed})
			{
				# Already processed.
				next;
			}
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, secure => 0, key => "log_0719", variables => { server => $server_name }});
			
			my $boot_after_server_uuid = $anvil->data->{servers}{server_uuid}{$server_uuid}{server_start_after_server_uuid};
			   $boot_after_server_uuid = "" if not defined $boot_after_server_uuid;
			   $boot_after_server_uuid = "" if $boot_after_server_uuid eq "NULL";
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { boot_after_server_uuid => $boot_after_server_uuid }});
			if ($boot_after_server_uuid)
			{
				if ($boot_after_server_uuid eq "00000000-0000-0000-0000-000000000000")
				{
					# This server is configured to stay off. 
					$anvil->data->{boot_server}{$server_name}{processed} = time;
					$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
						"boot_server::${server_name}::processed" => $anvil->data->{boot_server}{$server_name}{processed},
					}});
					
					$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, secure => 0, key => "log_0723", variables => { server => $server_name }});
					next;
				}
				
				# What's the server's name.
				my $boot_after_server_name = $anvil->data->{servers}{server_uuid}{$boot_after_server_uuid}{server_name};
				   $boot_after_server_name = "" if not defined $boot_after_server_name;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { boot_after_server_name => $boot_after_server_name }});
				
				# Has this server processed?
				if ($boot_after_server_name)
				{
					$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, secure => 0, key => "log_0717", variables => { 
						delay  => $boot_delay, 
						server => $boot_after_server_name,
					}});
					if (not exists $anvil->data->{boot_server}{$boot_after_server_name})
					{
						$anvil->data->{boot_server}{$boot_after_server_name}{processed} = 0;
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
							"boot_server::${boot_after_server_name}::processed" => $anvil->data->{boot_server}{$boot_after_server_name}{processed},
						}});
					}
					
					if ($anvil->data->{boot_server}{$boot_after_server_name}{processed})
					{
						my $processed_seconds_ago = time - $anvil->data->{boot_server}{$boot_after_server_name}{processed};
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { processed_seconds_ago => $processed_seconds_ago }});
						if ($processed_seconds_ago > $boot_delay)
						{
							# Ready to boot.
							$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, secure => 0, key => "log_0721", variables => { server => $server_name }});
						}
						else
						{
							# Not ready yet.
							$all_processed = 0;
							$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { all_processed => $all_processed }});
							
							my $time_to_wait = $boot_delay - $processed_seconds_ago;
							$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, secure => 0, key => "log_0720", variables => { 
								boot_after_server => $boot_after_server_name,
								this_server       => $server_name,
								time_to_wait      => $time_to_wait,
							}});
							next;
						}
					}
					else
					{
						# The other server hasn't processed yet.
						$all_processed = 0;
						$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { all_processed => $all_processed }});
						
						$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, secure => 0, key => "log_0718", variables => { 
							boot_after_server => $boot_after_server_name,
							this_server       => $server_name,
						}});
						next; 
					}
				}
			}
			
			if ($status eq "off")
			{
				# Boot it.
				my $wait    =  $anvil->data->{switches}{'wait'} ? 1 : 0;
				   $percent += $increment;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
					'wait'  => $wait,
					percent => $percent, 
				}});
				boot_server($anvil, $server_name, $wait, $percent);
				
				# If we're here, the server processed. 
				$anvil->data->{boot_server}{$server_name}{processed} = time;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
					"boot_server::${server_name}::processed" => $anvil->data->{boot_server}{$server_name}{processed}, 
				}});
			}
			elsif (not $anvil->data->{boot_server}{$server_name}{processed})
			{
				# It may have booted before we ran.
				$anvil->data->{boot_server}{$server_name}{processed} = time;
				$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, secure => 0, key => "log_0722", variables => { server => $server_name }});
			}
		}
		
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { all_processed => $all_processed }});
		if ($all_processed)
		{
			# We're done!
			$waiting = 0;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { waiting => $waiting }});
		}
		else
		{
			# Wait a bit.
			sleep 2;
			my $problem = $anvil->Cluster->parse_cib({debug => 3});
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { problem => $problem }});
		}
	}
	
	return(0);
}