use warnings;
use strict;

=head1 NAME

TAP::Harness::JUnit - Generate JUnit compatible output from TAP results

=head1 SYNOPSIS

    use TAP::Harness::JUnit;
    my $harness = TAP::Harness::JUnit->new({
    	xmlfile => 'output.xml',
    	...
    });
    $harness->runtests(@tests);

=head1 DESCRIPTION

The only difference between this module and I<TAP::Harness> is that
this adds optional 'xmlfile' argument, that causes the output to
be formatted into XML in format similar to one that is produced by
JUnit testing framework.

=head1 METHODS

This modules inherits all functions from I<TAP::Harness>.

=cut

package TAP::Harness::JUnit;
use base 'TAP::Harness';

use Benchmark ':hireswallclock';
use File::Temp;
use TAP::Parser;
use XML::Simple;
use Scalar::Util qw/blessed/;
use Encode;

our $VERSION = '0.36';

=head2 new

These options are added (compared to I<TAP::Harness>):

=over

=item xmlfile

Name of the file XML output will be saved to.  In case this argument
is ommited, default of "junit_output.xml" is used and a warning is issued.

Alternatively, the name of the output file can be specified in the 
$JUNIT_OUTPUT_FILE environment variable

=item notimes (DEPRECATED)

If provided (and true), test case times will not be recorded.

=item namemangle

Specify how to mangle testcase names. This is sometimes required to
interact with buggy JUnit consumers that lack sufficient validation.
Available values are:

=over

=item hudson

Replace anything but alphanumeric characters with underscores.
This is default for historic reasons.

=item perl (RECOMMENDED)

Replace slashes in directory hierarchy with dots so that the
filesystem layout resemble Java class hierarchy.

This is the recommended setting and may become a default in
future.

=item none

Do not do any transformations.

=back

=head1 ENVIRONMENT VARIABLES

The name of the output file can be specified in the $JUNIT_OUTPUT_FILE 
environment variable

=cut

sub new {
	my ($class, $args) = @_;
	$args ||= {};

	# Process arguments
	my $xmlfile = delete $args->{xmlfile};
	$xmlfile = $ENV{JUNIT_OUTPUT_FILE} unless defined $xmlfile;
	unless($xmlfile) {
		$xmlfile = 'junit_output.xml';
		warn 'xmlfile argument not supplied, defaulting to "junit_output.xml"';
	}

	# Get the name of raw perl dump directory
	my $rawtapdir = $ENV{PERL_TEST_HARNESS_DUMP_TAP};
	$rawtapdir = $args->{rawtapdir} unless $rawtapdir;
	$rawtapdir = File::Temp::tempdir() unless $rawtapdir;
	delete $args->{rawtapdir};

	my $notimes = delete $args->{notimes};

  	my $namemangle = delete $args->{namemangle} || 'hudson';
  
	my $self = $class->SUPER::new($args);
	$self->{__xmlfile} = $xmlfile;
	$self->{__xml} = {testsuite => []};
	$self->{__rawtapdir} = $rawtapdir;
	$self->{__cleantap} = not defined $ENV{PERL_TEST_HARNESS_DUMP_TAP};
	$self->{__notimes} = $notimes;
  	$self->{__namemangle} = $namemangle;
    $self->{__auto_number} = 1;

	# Inject our parser, that persists results for later
	# consumption and adds timing information
	@TAP::Harness::JUnit::Parser::ISA = ($self->parser_class);
	$self->parser_class ('TAP::Harness::JUnit::Parser');

	return $self;
}

# Add "(number)" at the end of the test name if the test with
# the same name already exists in XML
sub uniquename {
	my $self = shift;
	my $xml  = shift;
	my $name = shift;

	my $newname;

	# Beautify a bit -- strip leading "- "
	# (that is added by Test::More)
	$name =~ s/^[\s-]*//;

	$self->{__test_names} = { map { $_->{name} => 1 } @{ $xml->{testcase} } }
		unless $self->{__test_names};

	while(1) {
        my $number = $self->{__auto_number};
		$newname = $name
				 ? $name.($number > 1 ? " ($number)" : '')
				 : "Unnamed test case $number"
		;
		last unless exists $self->{__test_names}->{$newname};
		$self->{__auto_number}++;
	};

	$self->{__test_names}->{$newname}++;

	return xmlsafe($newname);
}

# Add result of a single TAP parse to the XML
sub parsetest {
	my $self = shift;
	my $name = shift;
	my $parser = shift;

	my $time = $parser->end_time - $parser->start_time;
	$time = 0 if $self->{__notimes};

    # Get the return code of test script before re-parsing the TAP output
	my $badretval = $parser->exit;

	if ($self->{__namemangle}) {
		# Older version of hudson crafted an URL of the test
		# results using the name verbatim. Unfortunatelly,
		# they didn't escape special characters, soo '/'-s
		# and family would result in incorrect URLs.
		# See hudson bug #2167
		$self->{__namemangle} eq 'hudson'
			and $name =~ s/[^a-zA-Z0-9, ]/_/g;

		# Transform hierarchy of directories into what would
		# look like hierarchy of classes in Hudson
		if ($self->{__namemangle} eq 'perl') {
			$name =~ s/^[\.\/]*//;
			$name =~ s/\./_/g;
			$name =~ s/\//./g;
		}
	}

	my $xml = {
		name => $name,
		failures => 0,
		errors => 0,
		tests => undef,
		'time' => $time,
		testcase => [],
		'system-out' => [''],
	};

	my $tests_run = 0;
	my $comment = ''; # Comment agreggator
	foreach my $result (@{$parser->{__results}}) {

		my $time = $result->{__end_time} - $result->{__start_time};
		$time = 0 if $self->{__notimes};

		# Counters
		if ($result->type eq 'plan') {
			$xml->{tests} = $result->tests_planned;
		}

		# Comments
		if ($result->type eq 'comment') {
			$result->raw =~ /^# (.*)/ and $comment .= xmlsafe($1)."\n";
		}

		# Errors
		if ($result->type eq 'unknown') {
			$comment .= xmlsafe($result->raw)."\n";
		}

		# Test case
		if ($result->type eq 'test') {
			$tests_run++;

			# JUnit can't express these -- pretend they do not exist
			$result->directive eq 'TODO' and next;
			$result->directive eq 'SKIP' and next;

			my $test = {
				'time' => $time,
				name => $self->uniquename($xml, $result->description),
				classname => $name,
			};

			if ($result->ok eq 'not ok') {
				$test->{failure} = [{
					type => blessed ($result),
					message => xmlsafe($result->raw),
					content => $comment,
				}];
				$xml->{errors}++;
			};

			push @{$xml->{testcase}}, $test;
			$comment = '';
		}

		# Log
		$xml->{'system-out'}->[0] .= xmlsafe($result->raw)."\n";
	}

	# Detect no plan
	unless (defined $xml->{tests}) {
		# Ensure XML will have non-empty value
		$xml->{tests} = 0;

		# Fake a failed test
		push @{$xml->{testcase}}, {
			'time' => $time,
			name => $self->uniquename($xml, 'Test died too soon, even before plan.'),
			classname => $name,
			failure => {
				type => 'Plan',
				message => 'The test suite died before a plan was produced. You need to have a plan.',
				content => 'No plan',
			},
		};
		$xml->{errors}++;
	}

	# Detect bad plan
	elsif ($xml->{failures} = $xml->{tests} - $tests_run) {
		# Fake a failed test
		push @{$xml->{testcase}}, {
			'time' => $time,
			name => $self->uniquename($xml, 'Number of runned tests does not match plan.'),
			classname => $name,
			failure => {
				type => 'Plan',
				message => ($xml->{failures} > 0
					? 'Some test were not executed, The test died prematurely.'
					: 'Extra tests tun.'),
				content => 'Bad plan',
			},
		};
		$xml->{errors}++;
		$xml->{failures} = abs ($xml->{failures});
	}

	# Bad return value. See BUGS
	elsif ($badretval and not $xml->{errors}) {
		# Fake a failed test
		push @{$xml->{testcase}}, {
			'time' => $time,
			name => $self->uniquename($xml, 'Test returned failure'),
			classname => $name,
			failure => {
				type => 'Died',
  				message => "Test died with return code $badretval",
  				content => "Test died with return code $badretval",
			},
		};
		$xml->{errors}++;
  		$xml->{tests}++;
	}

	# Add this suite to XML
	push @{$self->{__xml}->{testsuite}}, $xml;
}

sub runtests {
	my ($self, @files) = @_;

	my $aggregator = $self->SUPER::runtests(@files);

	foreach my $test (keys %{$aggregator->{parser_for}}) {
		$self->parsetest ($test => $aggregator->{parser_for}->{$test});
	}

	# Format XML output
	my $xs = new XML::Simple;
	my $xml = $xs->XMLout ($self->{__xml}, RootName => 'testsuites');

	# Ensure it is valid XML. Not very smart though.
	$xml = encode ('UTF-8', decode ('UTF-8', $xml));

	# Dump output
	open my $xml_fh, '>', $self->{__xmlfile}
		or die $self->{__xmlfile}.': '.$!;
	print $xml_fh "<?xml version='1.0' encoding='utf-8'?>\n";
	print $xml_fh $xml;
	close $xml_fh;

	# If we caused the dumps to be preserved, clean them
	File::Path::rmtree($self->{__rawtapdir}) if $self->{__cleantap};

	return $aggregator;
}

# Because not all utf8 characters are allowed in xml, only these
#    Char       ::=      #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]
# http://www.w3.org/TR/REC-xml/#NT-Char
sub xmlsafe {
    my $s = shift;

    return '' unless defined $s && length($s) > 0;

    $s =~ s/([\x01|\x02|\x03|\x04|\x05|\x06|\x07|\x08|\x0B|\x0C|\x0E|\x0F|\x11|\x12|\x13|\x14|\x15|\x16|\x17|\x18|\x19|\x1A|\x1B|\x1C|\x1D|\x1E|\x1F])/ sprintf("<%0.2x>", ord($1)) /gex;


    return $s;
}

# This is meant to transparently extend the parser chosen by user.
# Dynamically superubclassed to the chosen parser upon harnsess construction.
package TAP::Harness::JUnit::Parser;

use Time::HiRes qw/time/;

# Upon each line taken, account for time and remember the exact
# result. A harness should then collect the results from the aggregator.
sub next
{
	my $self = shift;
	my $result = $self->SUPER::next (@_);
	return $result unless $result; # last call

	# First assert
	unless ($self->{__results}) {
		$self->{__last_assert} = $self->start_time;
		$self->{__results} = []
	}

	# Account for time taken
	$result->{__start_time} = $self->{__last_assert};
	$result->{__end_time} = $self->{__last_assert} = time;

	# Remember for the aggregator
	push @{$self->{__results}}, $result;

	return $result;
}

=head1 SEE ALSO

JUnit XML schema was obtained from L<http://jra1mw.cvs.cern.ch:8180/cgi-bin/jra1mw.cgi/org.glite.testing.unit/config/JUnitXSchema.xsd?view=markup>.

=head1 ACKNOWLEDGEMENTS

This module was partly inspired by Michael Peters' I<TAP::Harness::Archive>.
It was originally written by Lubomir Rintel (GoodData)
C<< <lubo.rintel@gooddata.com> >> and includes code from several
contributors.

Following people (in no specific order) have reported problems
or contributed code to I<TAP::Harness::JUnit>:

=over

=item David Ritter

=item Jeff Lavallee

=item Andreas Pohl

=item Ton Voon

=item Kevin Goess


=back

=head1 BUGS

The comments that are above the C<ok> or C<not ok> are considered the output
of the test. This, though being more logical, is against TAP specification.

I<XML::Simple> is used to generate the output. It is suboptimal and involves
some hacks.

During testing, the resulting files are not tested against the schema, which
would be a good thing to do.

=head1 CONTRIBUTING

Source code for I<TAP::Harness::JUnit> is kept in a public GIT repository.
Visit L<https://github.com/jlavallee/tap-harness-junit>.

Bugs reports and feature enhancement requests are tracked at
L<https://rt.cpan.org/Public/Dist/Display.html?Name=TAP-Harness-JUnit>.

=head1 COPYRIGHT & LICENSE

Copyright 2008, 2009, 2010, 2011 I<TAP::Harness::JUnit> contributors.
All rights reserved.

This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.

=cut

1;