package EPrints::Plugin::Screen::EPMC::REF2014;

@ISA = ( 'EPrints::Plugin::Screen::EPMC' );

use strict;

sub new
{
      my( $class, %params ) = @_;

      my $self = $class->SUPER::new( %params );

      $self->{actions} = [qw( enable confirmed_disable cancel_disable disable ) ];
      $self->{disable} = 0; # always enabled, even in lib/plugins

      $self->{package_name} = "ref2014";

      return $self;
}

=item $screen->action_enable( [ SKIP_RELOAD ] )

Enable the L<EPrints::DataObj::EPM> for the current repository.

If SKIP_RELOAD is true will not reload the repository configuration.

=cut

sub action_enable
{
	my( $self, $skip_reload ) = @_;

	$self->SUPER::action_enable( $skip_reload );

	# Add the REF2014 UoAs:
	$self->add_ref2014_uoas();

	# If people are coming from an upgrade, they might need the new UoA 'Z' (added in v1.1)
	$self->add_ref2014_uoa_z();

	# re-commit ref_selection dataset (pre-populate ref_selection.output_type - added in v1.1)
	$self->recommit_ref_selections();

	$self->reload_config if !$skip_reload;
}

sub add_ref2014_uoas
{
	my( $self ) = @_;
	
	my $repo = $self->{repository};
	
	# First check that this subject tree doesn't already exist...
	my $ds = $repo->dataset( 'subject' );
	my $test_subject_id = $ds->dataobj( 'ref2014_uoas' );

	if( !defined $test_subject_id )
	{
		my $filename = $repo->config( 'archiveroot' ).'/cfg/subjects_uoa';
		if( -e $filename )
		{
			my $plugin = $repo->plugin( 'Import::FlatSubjects' );
			my $list = $plugin->input_file( dataset => $repo->dataset( 'subject' ), filename=>$filename );
			$repo->dataset( 'subject' )->reindex( $repo );
		}
	}
}

sub add_ref2014_uoa_z
{
	my( $self ) = @_;
	
	my $repo = $self->{repository};

print STDERR "adding UoA Z\n";

	my $lang = $repo->config( "defaultlanguage" );

	my $uoa_z = {
		subjectid => 'ref2014_z',
		name_name => [ 'Z - Unaffiliated' ],
		name_lang => [ $lang ],
		parents => [ 'ref2014_uoas' ],
		depositable => 'TRUE'
	};

	my $subds = $repo->dataset( 'subject' ) or return;

	# has the UoA Z already been imported?
	return if( defined $subds->dataobj( 'ref2014_z' ) );

print STDERR "creating UoA Z\n";

	my $z_object = $subds->create_dataobj( $uoa_z );

	if( defined $z_object )
	{
		$z_object->commit;
		$subds->reindex( $repo );
	}
}

# Note: recommits only the current Benchmark
sub recommit_ref_selections
{
	my( $self ) = @_;

	my $repo = $self->{repository};

print STDERR "recommitting REF Selection dataset...\n";

	my $benchmark = EPrints::DataObj::REFBenchmark->default( $repo ) or return;

	my $list = $benchmark->selections() or return;
        
	$list->map( sub {
                my( undef, undef, $item ) = @_;
                
		$item->commit( 1 );
        } );

}


=item $screen->action_disable( [ SKIP_RELOAD ] )

Disable the L<EPrints::DataObj::EPM> for the current repository.

If SKIP_RELOAD is true will not reload the repository configuration.

=cut

sub action_disable
{
	my( $self, $skip_reload ) = @_;

	my $session = $self->{session};

	my $frag = $session->make_doc_fragment;
	$frag->appendChild( $self->html_phrase( 'confirm' ) );
	
	my $form = $frag->appendChild( $self->render_form );
	$form->appendChild( $session->make_element( 'input', type => 'hidden', name => 'skip_reload', value => ($skip_reload?'1':'0') ) );

	$form->appendChild( $session->render_action_buttons(
		confirmed_disable => 'Confirm',
		cancel_disable => 'Cancel'
	) );

	$self->{processor}->add_message( 'warning', $frag );

}

sub allow_cancel_disable { shift->can_be_viewed }
sub allow_confirmed_disable { shift->can_be_viewed }

sub action_cancel_disable { shift->{processor}->{screenid} = 'Admin::EPM' }

sub action_confirmed_disable
{
	my( $self ) = @_;

	my $skip_reload = $self->{session}->param( 'skip_reload' );

	$self->SUPER::action_disable( $skip_reload );

	$self->reload_config if !$skip_reload;

	$self->{processor}->{screenid} = 'Admin::EPM';
}

sub properties_from
{
	my( $self ) = @_;

	$self->SUPER::properties_from;

	unless( defined $self->{processor}->{dataobj} )
	{
		$self->{processor}->{dataobj} = $self->{session}->dataset( 'epm' )->dataobj( $self->{package_name} );
	}
}

1;