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package LIMS::Model::WorkList;

use Moose;
extends 'LIMS::Model::Base';
with (
    'LIMS::Model::Roles::SessionData', # provides $self->user_profile
);
use namespace::clean -except => 'meta';

has lab_test_status_options_map => ( is => 'ro', isa => 'HashRef', lazy_build => 1 );
has local_stash => ( is => 'rw', isa => 'HashRef', default => sub { {} } );
has form_data   => ( is => 'rw', isa => 'HashRef', default => sub { {} } );
__PACKAGE__->meta->make_immutable;

use Data::Dumper;
use LIMS::Local::Utils;

#-------------------------------------------------------------------------------
sub get_outstanding_investigations_count {
    my $self = shift;
    my $data = shift; # warn Dumper $data;

    my $args = $self->_outstanding_investigations_query($data);
    # stash for later:
    $self->local_stash->{outstanding_investigations_query} = $args;
    my $n = LIMS::DB::RequestLabTestStatus::Manager->get_objects_count(%$args);
    return $n;
}

#-------------------------------------------------------------------------------
sub get_outstanding_investigations {
    my $self = shift;
    my $data = shift; # warn Dumper $data;
    # get query from stash if called from C::Worklist::display():
    my $args = $self->local_stash->{outstanding_investigations_query}
        || $self->_outstanding_investigations_query($data); # warn Dumper $args;
    my $o = LIMS::DB::RequestLabTestStatus::Manager->get_objects(%$args);
    return $o;
}

#-------------------------------------------------------------------------------
sub _outstanding_investigations_query { # shared by above 2 methods
    my $self = shift;
    my $data = shift; # warn Dumper $data;

    my @query_params = ();

    # add any query args direct to @query_params:
    if ( my $args = $data->{query_args} ) {
        push @query_params, @$args;
    }

    # restrict on optional lab_test_id if supplied:
    if ( my $lab_test_id = $data->{lab_test_id} ) {
        push @query_params, ( lab_test_id => $lab_test_id ); # str or arrayref
    }
	else {
		push @query_params, ( 'lab_test.lab_section_id' => $data->{lab_section_id} );
	}

	# restrict on optional status_option_id if supplied:
	if ( my $status_option_id = $data->{status_option_id} ) {
		push @query_params, ( status_option_id => $status_option_id ) ; # str
	}
	# need to exclude 'complete' if status_option_id not supplied:
	else {
		# get lab_test_status_option.id for 'complete':
		my $complete_id = $self->lab_test_status_options_map->{complete};
		push @query_params, ( status_option_id => { ne => $complete_id } );
	}

	# restrict on >= optional lab number if supplied:
	if ( my $lab_number = $data->{lab_number_from} ) {
		my ($request_number, $year)
			= LIMS::Local::Utils::split_labno($lab_number);
		# how to get all requests from defined lab_number if previous yr eg 12000/09:
		# WHERE ( request_number >= $request_number AND year = $year ) OR year > $year
		push @query_params, (
			or => [
				and => [
					request_number => { ge => $request_number },
					year => $year,
				],
				year => { gt => $year },
			],
		);
	} # warn Dumper \@query_params;

	# restrict on optional request id's if supplied:
	if ( my $request_id = $data->{request_id} ) {
		push @query_params, ( request_id => $request_id );
	}

	my %sort_options = (
		lab_number => [ qw(requests.year requests.request_number) ],
		lab_tests  => [
			qw(
				lab_test.test_type
				lab_test.field_label
				requests.year
				requests.request_number
			)
		],
		field_label => [ qw(
			lab_test.field_label requests.year requests.request_number
		) ],
	);

	# if sort_by supplied, use it:
	my $sort_by = $data->{sort_by} || 'lab_number'; # default if not supplied
		# warn Dumper [$data->{sort_by},$sort_by];
	my %args = (
		query => \@query_params,
		require_objects => [
            'request.patient_case.patient',
            'request.patient_case.referral_source',
            'lab_test.lab_section',
            'status',
            'user',
        ],
		with_objects => [
            'request.request_initial_screen.screen',
            'request.request_external_ref',
		],
        nested_joins => 0, # THIS IS ESSENTIAL FOR EFFICIENT QUERY (ie 138 vs > 16 x 10^9 rows !!)
        sort_by => $sort_options{$sort_by},
	); # warn Dumper \%args;

    # request_trial used in tt filter
    push @{ $args{with_objects} }, 'request.request_trial';

	# restrict db hit if only want selected table(s):
	if ( my $selected_tables = $data->{fetch_only} ) {
		$args{fetch_only} = $selected_tables;
	}
    return \%args;
}

#-------------------------------------------------------------------------------
sub get_active_sections_list {
    my $self = shift;

    my $complete_id = $self->lab_test_status_options_map->{complete};

    my %args = (
        query => [ status_option_id => { ne => $complete_id } ],
        require_objects => 'lab_tests.request_lab_test_status',
        multi_many_ok   => 1, # to silence warning
        sort_by  => 'section_name',
        distinct => 1,
    );

    my $active_sections = LIMS::DB::LabSection::Manager->get_lab_sections(%args);

    return $active_sections;
}

#-------------------------------------------------------------------------------
sub get_requesting_user {
	my ($self, $request_id, $field_label) = @_;

	my @args = (
		query => [
			request_id => $request_id,
			action     => 'requested ' . $field_label,
		],
		select  => 'user.username',
		sort_by => 'id DESC', # most recent if multiple
		limit   => 1,
		require_objects => 'user',
	);
	my $o = LIMS::DB::RequestLabTestHistory::Manager
		->get_request_lab_test_histories(@args); # array(ref), size 1
	return $o->[0] if $o;
}

#-------------------------------------------------------------------------------
sub get_active_investigations_for_section {
    my ($self, $lab_section_id) = @_;

    my $complete_id = $self->lab_test_status_options_map->{complete};

    my %args = (
        query => [
            lab_section_id   => $lab_section_id,
            status_option_id => { ne => $complete_id },
        ],
        require_objects => [ 'lab_section', 'request_lab_test_status' ],
        sort_by  => 'field_label',
        distinct => 1,
    );

    my $investigations = LIMS::DB::LabTest::Manager->get_lab_tests(%args);

    return $investigations;
}

#-------------------------------------------------------------------------------
sub get_outstanding_histology_blocks {
	my $self = shift;

	my %args = (
		query => [ status => undef ], # IS NULL
		sort_by => [ qw( request.year request.request_number ) ],
		require_objects => [
            'request.patient_case.patient',
            'request.patient_case.referral_source',
		],
	);
	my $data
		= LIMS::DB::RequestExternalRef::Manager->get_request_external_ref(%args);

	return $data;
}

#-------------------------------------------------------------------------------
sub get_wgs_requests {
    my $self = shift;
    # deadly slow doing this in 1 search, need to get request_id's first:
    my $requests = do {
        my %args = (
            select => [ 'id' ],
            query  => [
                test_name   => 'wgs_referral',
                description => { ne => 'complete' },
            ],
            require_objects => [
                'request_lab_tests_status.status',
                'request_lab_tests_status.lab_test',
            ],
        );
        LIMS::DB::Request::Manager->get_objects(%args);
    }; # warn Dumper $requests;
    return 0 unless @$requests;

    my @request_ids = map $_->id, @$requests; # warn Dumper \@request_ids;
    my %args = (
        query => [ id => \@request_ids ],
		require_objects => [
            'patient_case.patient',
            'patient_case.referral_source',
            'referrer_department.referrer',
            'referrer_department.hospital_department',
		],
        with_objects => [ # may not be reported at worklist generation time:
            'request_report.diagnosis',
        ],
    );
    my $data = LIMS::DB::Request::Manager->get_objects(%args);
    return $data;
}

#-------------------------------------------------------------------------------
sub get_unreported_hts_requests {
    my $self = shift;

    my %args = (
        query => [
            description  => 'screened',
            section_name => 'High-throughput sequencing',
        ],
		require_objects => [
            'status_option',
            'results_summary.lab_section',
		],
    );
    my $data = LIMS::DB::Request::Manager->get_objects(%args);
    return $data;
}

#-------------------------------------------------------------------------------
sub request_status_count {
    my $self = shift;
    my $args = shift; # warn Dumper $args; # href status_query & optional duration

    my $query_args = $self->_get_request_status_query_args($args);
        # warn Dumper $query_args;
    my $n = LIMS::DB::Request::Manager->get_requests_count(%$query_args);
    return $n;
}

#-------------------------------------------------------------------------------
sub request_status_query {
    my $self = shift;
    my $args = shift; # warn Dumper $args; # href status_query & duration

    my $data = []; # caller expects arrayref returned

#$self->set_rose_debug(1);
    my $query_args = $self->_get_request_status_query_args($args); # $self->debug($q);
    if ($query_args) {
        $data = LIMS::DB::Request::Manager->get_requests(%$query_args);
    }
#$self->set_rose_debug(0);
    return $data; # no longer requre separate _process_tests_complete() method

    # test_completed requires further processing - too complex for get args method:
    # return ( $args->{status_query} =~ /tests_completed/ )
    #	? $self->_process_tests_complete($data)
    #	: $data;
}

#-------------------------------------------------------------------------------
=begin # combined methods in _get_request_status_query_args()
sub tests_completed_count {
    my $self = shift;

=begin # query:
	select count(distinct(r.id))
	# select distinct(concat(r.request_number, '/', r.year - 2000))
	from requests r
		join status_options so on r.status_option_id = so.id
	where so.description = 'screened'
		and r.id not in (
			select distinct(r.id)
			from requests r
				join status_options so on r.status_option_id = so.id
				join ( request_lab_test_status ts
					join lab_test_status_options ltso ON ts.status_option_id = ltso.id )
						on ts.request_id = r.id
			where so.description = 'screened'
			   and ltso.description <> 'complete'
		)
#=cut

    my @ids = do { # requests at status = screened with at least 1 lab-test incomplete:
		my @args = (
			require_objects => [
				'status_option', 'request_lab_tests_status.status',
			],
			query => [
				'status_option.description' => 'screened',
				'request_lab_tests_status.status.description'
					=> { ne => 'complete' },
			],
			distinct => 1,
		);
        my $o = LIMS::DB::Request::Manager->get_objects(@args);
        map $_->id, @$o;
    }; # warn Dumper \@ids;

    my $n = do {
		my @args = (
			require_objects => 'status_option',
			query => [
				description => 'screened',
				'!id' => \@ids,
			],
		);
		LIMS::DB::Request::Manager->get_objects_count(@args);
	};

    return $n;
 }
=cut

#-------------------------------------------------------------------------------
=begin # combined method in _get_request_status_query_args()
# skip requests from $data with any tests NOT set to complete:
sub _process_tests_complete {
	my ($self, $data) = @_;

	# get request_ids:
	my @ids = map $_->id, @$data;
	# get lab_test status:
	my $query = [ request_id => \@ids ];
	my $statii = LIMS::DB::RequestLabTestStatus::Manager
		->get_objects( query => $query, require_objects => 'status' );
	# get map of requests with at least 1 incomplete lab test:
	my %status_map; map {
		my $reqest_id = $_->request_id;
		$status_map{$reqest_id}++ if $_->status->description ne 'complete';
	} @$statii; # warn Dumper \%status_map;

	my @no_outstanding; # list of request objects with no outstanding lab tests
	for (@$data) {
		my $request_id = $_->id;
		# skip request if any outstanding lab tests:
		next if $status_map{$request_id};
		push @no_outstanding, $_;
	}
	return \@no_outstanding;
}
=cut

#-------------------------------------------------------------------------------
sub _get_request_status_query_args {
    my $self = shift;
    my $args = shift;

    my $duration = $args->{duration};
    my $status   = $args->{status_query};

    # args common to all status requests:
    my %args = (
        query => undef, # defined below
        require_objects => [
			'status_option',
            'patient_case.patient',
            'patient_case.referral_source',
        ],
        with_objects => [ 'request_trial' ], # maybe modified below
        nested_joins => 0,
        sort_by => [ 'requests.created_at, request_number' ],
    );

    if ( $status eq 'urgent' ) {
        push @{ $args{require_objects} }, 'request_option.option';
        push @{ $args{with_objects}    }, 'request_initial_screen.screen';

		# only want unreported/unauthorised requests:
		my @status_options = qw(new screened);

		# add 'reported' to status_options if 'authorised' option in use:
		my $option_authorised
			= LIMS::DB::StatusOption->new(description => 'authorised')->load;
		push @status_options, 'reported' if $option_authorised->is_active eq 'yes';

        $args{query} = [
            option_name => 'urgent',
			'status_option.description' => \@status_options,
        ],
    }
	elsif ( $status eq 'unscreened' ) {
		$args{query} = [ 'status_option.description' => 'new' ];
	}
    # unreported; all tests complete (** must come before /^unreported/ **)
    elsif ( $status =~ /^unreported_tests_complete/ ) {
        push @{ $args{require_objects} }, 'request_initial_screen.screen';
        push @{ $args{query} }, ( 'status_option.description' => 'screened' );

        # get list of screened requests with at least 1 lab-test NOT complete to exclude:
        my @ids = do {
            my @args = (
                require_objects => [
                    'status_option', 'request_lab_tests_status.status',
                ],
                query => [
                    'status_option.description' => 'screened',
                    'request_lab_tests_status.status.description'
                        => { ne => 'complete' },
                ],
                distinct => 1,
            );
            my $o = LIMS::DB::Request::Manager->get_objects(@args);
            map $_->id, @$o;
        }; # warn Dumper \@ids;
        push @{ $args{query} }, ( '!id' => \@ids ) if @ids; # id NOT IN (...)
    }
    # unreported (not considering test status):
    elsif ( $status =~ /^unreported/ ) { # could include _outreach
        my $days = $duration; # warn $days;
		$args{query} = [
			'status_option.description' => 'screened',
            created_at => { lt => DateTime->today->subtract(days => $days) },
		];
		push @{ $args{require_objects} }, 'request_initial_screen.screen';
	}
	# unauthorised - only supplied by template if 'authorised' status_option is active:
    elsif ( $status =~ /^unauthorised/ ) { # could include _outreach
		$args{query} = [ 'status_option.description' => 'reported' ];
		push @{ $args{require_objects} },
            ( 'request_initial_screen.screen', 'request_status' );
	} # warn Dumper \%args;
    # reported/authorised, request status incomplete (not considering test status)
	elsif ( $status eq 'incomplete' ) {
		my $option_authorised
			= LIMS::DB::StatusOption->new(description => 'authorised')->load;
		my $status = $option_authorised->is_active eq 'yes'
			? 'authorised'
			: 'reported';

		$args{query} = [ 'status_option.description' => $status ];
		push @{ $args{require_objects} }, 'request_initial_screen.screen';
	}
    # reported/authorised, request status incomplete, all tests complete
	elsif ( $status eq 'complete' ) {
		my $option_authorised
			= LIMS::DB::StatusOption->new(description => 'authorised')->load;
		my $status = $option_authorised->is_active eq 'yes'
			? 'authorised'
			: 'reported';
        push @{ $args{query} }, ( 'status_option.description' => $status );

        # get list of reported/authorised requests with at least 1 lab-test NOT
        # complete to exclude:
        my @ids = do {
            my @args = (
                require_objects => [
                    'status_option', 'request_lab_tests_status.status',
                ],
                query => [
                    'status_option.description' => $status,
                    'request_lab_tests_status.status.description'
                        => { ne => 'complete' },
                ],
                distinct => 1,
            );
            my $o = LIMS::DB::Request::Manager->get_objects(@args);
            map $_->id, @$o;
        }; # warn Dumper \@ids;
        push @{ $args{query} }, ( '!id' => \@ids, ) if @ids; # id NOT IN (...)
	}
	else { # should never happen, but will return all records otherwise:
		$args{query} = [ request_number => 0 ];
	} # warn Dumper \%args;

    # unreported_outreach, unauthorised_outreach, test_completed_outreach:
    push @{ $args{query} }, ( 'screens.description' => { rlike => 'outreach' } )
        if $status =~ /_outreach\Z/; # warn Dumper \%args;

    return \%args;
}

#-------------------------------------------------------------------------------
sub _build_lab_test_status_options_map {
    my $self = shift;

    my $status_options = LIMS::DB::LabTestStatusOption::Manager->
        get_lab_test_status_options;

    my %map = map {
        $_->description => $_->id;
    } @$status_options;

    return \%map;
}

1;