package TAP::Parser::Result;

use strict;
use vars qw($VERSION);

use TAP::Parser::Result::Bailout ();
use TAP::Parser::Result::Comment ();
use TAP::Parser::Result::Plan    ();
use TAP::Parser::Result::Test    ();
use TAP::Parser::Result::Unknown ();
use TAP::Parser::Result::Version ();
use TAP::Parser::Result::YAML    ();

BEGIN {
    no strict 'refs';
    foreach my $token (qw( plan comment test bailout version unknown yaml )) {
        my $method = "is_$token";
        *$method = sub { return $token eq shift->type };
    }
}

##############################################################################

=head1 NAME

TAP::Parser::Result - TAP::Parser output

=head1 VERSION

Version 3.00

=cut

$VERSION = '3.00';

=head2 DESCRIPTION

This is merely a factory class which returns an object representing the
current bit of test data from TAP (usually a line).  It's for internal use
only and should not be relied upon.

=cut

# note that this is bad.  Makes it very difficult to subclass, but then, it
# would be a lot of work to subclass this system.
my %class_for = (
    plan    => 'TAP::Parser::Result::Plan',
    test    => 'TAP::Parser::Result::Test',
    comment => 'TAP::Parser::Result::Comment',
    bailout => 'TAP::Parser::Result::Bailout',
    version => 'TAP::Parser::Result::Version',
    unknown => 'TAP::Parser::Result::Unknown',
    yaml    => 'TAP::Parser::Result::YAML',
);

##############################################################################

=head2 METHODS

=head3 C<new>

  my $result = TAP::Parser::Result->new($token);

Returns an instance the appropriate class for the test token passed in.

=cut

sub new {
    my ( $class, $token ) = @_;
    my $type = $token->{type};
    return bless $token => $class_for{$type}
      if exists $class_for{$type};
    require Carp;

    # this should never happen!
    Carp::croak("Could not determine class for\n$token->{type}");
}

=head2 Boolean methods

The following methods all return a boolean value and are to be overridden in
the appropriate subclass.

=over 4

=item * C<is_plan>

Indicates whether or not this is the test plan line.

 1..3

=item * C<is_test>

Indicates whether or not this is a test line.

 is $foo, $bar, $description;

=item * C<is_comment>

Indicates whether or not this is a comment.

 # this is a comment

=item * C<is_bailout>

Indicates whether or not this is bailout line.

 Bail out! We're out of dilithium crystals.

=item * C<is_version>

Indicates whether or not this is a TAP version line.

 TAP version 4

=item * C<is_unknown>

Indicates whether or not the current line could be parsed.

 ... this line is junk ...

=item * C<is_yaml>

Indicates whether or not this is a YAML chunk.

=back

=cut

##############################################################################

=head3 C<raw>

  print $result->raw;

Returns the original line of text which was parsed.

=cut

sub raw { shift->{raw} }

##############################################################################

=head3 C<type>

  my $type = $result->type;

Returns the "type" of a token, such as C<comment> or C<test>.

=cut

sub type { shift->{type} }

##############################################################################

=head3 C<as_string>

  print $result->as_string;

Prints a string representation of the token.  This might not be the exact
output, however.  Tests will have test numbers added if not present, TODO and
SKIP directives will be capitalized and, in general, things will be cleaned
up.  If you need the original text for the token, see the C<raw> method.

=cut

sub as_string { shift->{raw} }

##############################################################################

=head3 C<is_ok>

  if ( $result->is_ok ) { ... }

Reports whether or not a given result has passed.  Anything which is B<not> a
test result returns true.  This is merely provided as a convenient shortcut.

=cut

sub is_ok {1}

##############################################################################

=head3 C<passed>

Deprecated.  Please use C<is_ok> instead.

=cut

sub passed {
    warn 'passed() is deprecated.  Please use "is_ok()"';
    shift->is_ok;
}

##############################################################################

=head3 C<has_directive>

  if ( $result->has_directive ) {
     ...
  }

Indicates whether or not the given result has a TODO or SKIP directive.

=cut

sub has_directive {
    my $self = shift;
    return ( $self->has_todo || $self->has_skip ) || '';
}

##############################################################################

=head3 C<has_todo>

 if ( $result->has_todo ) {
     ...
 }

Indicates whether or not the given result has a TODO directive.

=cut

sub has_todo { 'TODO' eq ( shift->{directive} || '' ) }

##############################################################################

=head3 C<has_skip>

 if ( $result->has_skip ) {
     ...
 }

Indicates whether or not the given result has a SKIP directive.

=cut

sub has_skip { 'SKIP' eq ( shift->{directive} || '' ) }

=head3 C<set_directive>

Set the directive associated with this token. Used internally to fake
TODO tests.

=cut

sub set_directive {
    my ( $self, $dir ) = @_;
    $self->{directive} = $dir;
}

1;