#!/usr/bin/perl
#
#
#

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

$| = 1;

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

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

sub system_call
{
	my $parameters = shift;
	my $shell_call = $parameters->{shell_call};

	my ($shell_output, $shell_return_code) = $anvil->System->call({ shell_call => $shell_call });
	$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => 2, list => {
		shell_call        => $shell_call,
		shell_output      => $shell_output,
		shell_return_code => $shell_return_code
	} });

	return ($shell_output, $shell_return_code);
}

sub is_existing_server_screenshot_outdated
{
	my $parameters  = shift;
	my $server_uuid = $parameters->{server_uuid};

	my ($encoded_image, $variable_uuid, $variable_mtime) = $anvil->Database->read_variable({ variable_name => "server_screenshot::".$server_uuid });

	my $time_difference = time - $variable_mtime;

	return $time_difference > 120 ? 1 : 0;
}

sub get_server_screenshot
{
	my $parameters  = shift;
	my $server_uuid = $parameters->{server_uuid};
	my ($resize_x, $resize_y) = split(/x/ , $parameters->{resize_args});

	my $shell_call = "virsh screenshot --domain ".$server_uuid." --file /dev/stdout | sed 's/Screenshot.*//'";

	if ($resize_x =~ /^\d+$/ && $resize_y =~ /^\d+$/)
	{
		$shell_call .= " | pamscale -quiet -xyfit ".$resize_x." ".$resize_y;
		$shell_call .= " | pamtopng -quiet";
	}

	$shell_call .= " | base64 --wrap 0";

	my ($shell_output, $shell_return_code) = system_call({ shell_call => $shell_call });

	return $shell_return_code == 0 ? $shell_output : undef;
}

sub insert_server_screenshot
{
	my $parameters    = shift;
	my $server_uuid   = $parameters->{server_uuid};
	my $encoded_image = $parameters->{encoded_image};

	$anvil->Database->insert_or_update_states({
		state_name => "server_screenshot::".$server_uuid,
		state_note => $encoded_image
	});
}

$anvil->Get->switches;

$anvil->Database->connect;
$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 2, secure => 0, key => "log_0132"});
if (not $anvil->data->{sys}{database}{connections})
{
	# No databases, exit.
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, 'print' => 1, priority => "err", key => "error_0003"});
	$anvil->nice_exit({exit_code => 1});
}

# Try to get a job UUID if not given.
if (not $anvil->data->{switches}{'job-uuid'})
{
	$anvil->data->{switches}{'job-uuid'} = $anvil->Job->get_job_uuid({ program => $THIS_FILE });
	$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => 2, list => {
		"switches::job-uuid" => $anvil->data->{switches}{'job-uuid'}
	} });
}

# Handle this script as a job when job UUID is provided.
if ($anvil->data->{switches}{'job-uuid'})
{
	$anvil->Job->clear();
	$anvil->Job->get_job_details();
	$anvil->Job->update_progress({
		progress         => 1,
		job_picked_up_by => $$,
		job_picked_up_at => time,
		message          => "message_0263"
	});

	foreach my $line (split/\n/, $anvil->data->{jobs}{job_data})
	{
		if ($line =~ /server-uuid=(.*?)$/)
		{
			$anvil->data->{switches}{'server-uuid'} = $1;
		}

		if ($line =~ /resize=(.*?)$/)
		{
			$anvil->data->{switches}{'resize'} = $1;
		}

		if ($line =~ /stdout=(.*?)$/)
		{
			$anvil->data->{switches}{'stdout'} = $1;
		}
	}
}

my $server_uuid = $anvil->data->{switches}{'server-uuid'};
my $resize_args = $anvil->data->{switches}{'resize'};
my $is_stdout   = $anvil->data->{switches}{'stdout'};
my $job_uuid    = $anvil->data->{switches}{'job-uuid'};

$anvil->Log->variables({ source => $THIS_FILE, line => __LINE__, level => 2, list => {
	server_uuid => $server_uuid,
	resize_args => $resize_args,
	is_stdout   => $is_stdout,
	job_uuid    => $job_uuid
} });

if ($server_uuid)
{
	my $encoded_image;

	if ($is_stdout)
	{
		$encoded_image = get_server_screenshot({ server_uuid => $server_uuid, resize_args => $resize_args });

		if (defined $encoded_image)
		{
			print($encoded_image);

			$anvil->Job->update_progress({ progress => 100, message => "message_0264" });
		}
		else
		{
			$anvil->Job->update_progress({ progress => 100, message => "message_0265" });
		}
	}
	elsif (is_existing_server_screenshot_outdated({ server_uuid => $server_uuid }))
	{
		$encoded_image = get_server_screenshot({ server_uuid => $server_uuid, resize_args => $resize_args });

		if (defined $encoded_image)
		{
			insert_server_screenshot({ server_uuid => $server_uuid, encoded_image => $encoded_image });

			$anvil->Job->update_progress({ progress => 100, message => "message_0264" });
		}
		else
		{
			$anvil->Job->update_progress({ progress => 100, message => "message_0265" });
		}
	}
	else
	{
		$anvil->Job->update_progress({ progress => 100, message => "message_0266" });
	}
}
else
{
	$anvil->Job->update_progress({ progress => 100, message => "message_0266" });
}