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package LIMS::Controller::Outreach;

use Moose;
BEGIN { extends 'LIMS::Base' }
with (
    'LIMS::Controller::Roles::Misc', # redirect_after_edit_success(), format_dfv_msg()
    'LIMS::Controller::Roles::FormData', # get_data_from_dfv
    'LIMS::Controller::Roles::DataFile', # slurp_file_contents()
    'LIMS::Controller::Roles::DataImport', # parse_data_file(), check_datafile_integrity()
	'LIMS::Controller::Roles::RecordHandler',
);
use namespace::clean -except => 'meta';

__PACKAGE__->meta->make_immutable(inline_constructor => 0);

use Data::Dumper;
use LIMS::Controller::Report;
# ------------------------------------------------------------------------------
# default() should never be called direct - redirect to start page:
sub default : StartRunmode {
    my $self = shift; $self->_debug_path($self->get_current_runmode);
    return $self->redirect( $self->query->url );
}

# ------------------------------------------------------------------------------
# outreach/=/x should never be called direct - forward to startrunmode:
sub load : Runmode {
    return shift->forward('default');
}

# ------------------------------------------------------------------------------
sub demographics : Runmode {
    my $self = shift; $self->_debug_path($self->get_current_runmode);

    return $self->forbidden() unless $self->user_can('edit_outreach_data');

    my $request_id = $self->param('id')
    || return $self->error('no request_id passed to '.$self->get_current_runmode);

    my $patient_id = $self->param('Id')
    || return $self->error('no patient_id passed to '.$self->get_current_runmode);

    # can't use DFV check_rm() here as target is in another controller:
    my $profile = $self->validate('outreach_demographics');
    my $dfv = $self->validate_form_params($profile); # warn Dumper $dfv;

    my $home = $self->query->url . '/report/outreach/' . $request_id;

    if ($dfv->has_invalid || $dfv->has_missing) {
        my $msg = $self->format_dfv_msg($dfv); # parse dfv template
        $self->flash( error => $msg ); # warn Dumper $dfv->msgs;
        return $self->redirect($home);
    }

    my $data = $dfv->valid;
    # add patient_id:
    $data->{patient_id} = $patient_id; # warn Dumper $data; return 1;

    # param 'dispatch_to' is Outreach param - remove & update separately:
    if ( my $dispatch_to = $data->{dispatch_to} ) {
        my %args = (
            patient_id  => $patient_id,
            dispatch_to => $dispatch_to,
        );
        my $rtn = $self->model('Outreach')->update_dispatch_detail(\%args);
        return $self->error($rtn) if $rtn; # only return on error here
        delete $data->{dispatch_to}; # or downstream model method blows up
    }

    my $rtn = $self->model('Patient')->update_patient_demographics($data);
    return $rtn
        ? $self->error($rtn)
        : $self->redirect_after_edit_success('/report/outreach/' . $request_id);
}

# ------------------------------------------------------------------------------
# DFV error return page for questionnaire():
sub questionnaire {
    my $self = shift; $self->_debug_path($self->get_current_runmode);
    my $errs = shift; $self->stash( errs => $errs );

    my $menu_options = $self->model('Outreach')->get_menu_options;
    my %h = ( menu_options => $menu_options ); # format required by outreach tt's
    $self->tt_params( outreach => \%h );

    return $self->tt_process('outreach/err_questionnaire.tt', $errs);
}

# ------------------------------------------------------------------------------
sub do_questionnaire : Runmode {
    my $self = shift; $self->_debug_path($self->get_current_runmode);

    return $self->forbidden() unless $self->user_can('edit_outreach_data');

    my $request_id = $self->param('id')
    || return $self->error('no id passed to '.$self->get_current_runmode);

	my $dfv = $self->check_rm(
        questionnaire => $self->validate('outreach_questionnaire')
    ); # don't return on error, update tables then handle error

    my $data = $dfv->valid;
    $data->{request_id} = $request_id; # warn Dumper $data;

    # update questionnaire tables even if have missing fields:
    my $rtn = $self->model('Outreach')->update_patient_questionnaire($data);

    if ($rtn) { # if db error
        return $self->error($rtn);
    }
    elsif ($self->dfv_error_page) { # only for info - still want db updates
        return $self->dfv_error_page;
    }
    else {
        my $msg = $self->messages('outreach')->{questionnaire_success};
        $self->flash( info => $msg );
    }

    $self->redirect( $self->query->url . '/report/outreach/' . $request_id );
}

# ------------------------------------------------------------------------------
sub lab_results : Runmode {
    my $self = shift; $self->_debug_path($self->get_current_runmode);

    return $self->forbidden() unless $self->user_can('edit_outreach_data');

    my $request_id = $self->param('id')
    || return $self->error('no id passed to '.$self->get_current_runmode);

    # can't use DFV check_rm() here as target is in another controller:
    my $profiles = $self->validate('outreach_lab_results'); # profiles for all depts

    my $dept = $self->query->param('department') # eg immunology
	|| return $self->error("no hidden 'department' param passed to "
		. $self->get_current_runmode); # or data validation methods fail

    my $dfv = $self->validate_form_params($profiles->{$dept}); # warn Dumper $dfv;

    my $data = $dfv->valid;
    # add patient_id:
    $data->{_request_id} = $request_id; # warn Dumper $data;

    my $rtn = $self->model('Outreach')->update_lab_params($data);
    return $self->error($rtn) if $rtn; # if db error

    my $addr = '/report/outreach/' . $request_id;

    if ($dfv->has_invalid || $dfv->has_missing) {
        my $msg = $self->format_dfv_msg($dfv); # parse dfv template
        $self->flash( error => $msg ); # warn Dumper $dfv->msgs;

        return $self->redirect( $self->query->url . $addr );
    }
    else {
        return $self->redirect_after_edit_success($addr);
    }
}

# ------------------------------------------------------------------------------
# import flow data from text file:
sub import_datafile : Runmode { # code taken from C::Results::import_datafile()
    my $self = shift; $self->_debug_path($self->get_current_runmode);

    return $self->forbidden() unless $self->user_can('edit_outreach_data');

    my $request_id = $self->param('id')
    || return $self->error('no id passed to ' . $self->get_current_runmode);

    my $filename = $self->query->param('datafile')
    || return $self->error('no filename passed to ' . $self->get_current_runmode);

    # extract contents of datafile to object accessor:
    my $data = $self->get_datafile_contents($filename);
    $self->parse_data_file($data);

    # check internal datafile refs (filename & patient ids) match
    $self->_check_datafile_integrity() # sets flash message for redirect
    || return $self->redirect( $self->query->url . '/image/=/' . $request_id );

    # get results from data file:
	my $results = $self->_get_datafile_results() # sets flash message for redirect
	|| return $self->redirect( $self->query->url . '/image/=/' . $request_id );

    # get datafiles config:
    my $datafile_cfg = $self->datafiles_config; # warn Dumper $datafile_cfg;
    # get list of field names for table update:
    my $cols = $datafile_cfg->{CMP}->{cols}; # warn Dumper $cols;

    # create hash of col => result:
    my %data; @data{@$cols} = @$results;

    # add request_id & department:
    $data{_request_id} = $request_id;
    $data{department} = 'flow_cytometry'; # warn Dumper \%data;

    my $rtn = $self->model('Outreach')->update_lab_params(\%data);

    if ($rtn) { # if db error
        return $self->error($rtn);
    }
    else {
        $self->flash( info => $self->messages('outreach')->{data_import_success} );
        return $self->redirect(
            $self->query->url . '/report/outreach/' . $request_id );
    }
}

# ------------------------------------------------------------------------------
sub edit_followup : Runmode {
    my $self = shift; $self->_debug_path($self->get_current_runmode);
    my $errs = shift;

    return $self->forbidden() unless $self->user_can('edit_outreach_data');

    my $request_id = $self->param('id')
    || return $self->error('no request_id passed to '.$self->get_current_runmode);

    { # follow-up data:
        my $data = $self->model('Outreach')->get_followup_data($request_id);
        $self->tt_params( followup_data => $data );
    }
    { # request_data:
        my $data
            = $self->model('Request')->get_patient_and_request_data($request_id);
        $self->tt_params( request_data => $data );
    }
    { # follow-up options:
        my $options = $self->model('Outreach')->followup_options_map;
        $self->tt_params( followup_options => $options );
    }

    $self->js_validation_profile('outreach_followup');

    return $self->tt_process();
}

# ------------------------------------------------------------------------------
sub do_edit_followup : Runmode {
    my $self = shift; $self->_debug_path($self->get_current_runmode);

    return $self->forbidden() unless $self->user_can('edit_outreach_data');

    my $request_id = $self->param('id')
    || return $self->error('no request_id passed to '.$self->get_current_runmode);

	my $dfv = $self->check_rm('edit_followup', $self->validate('outreach_followup') )
	|| return $self->dfv_error_page;

    my $data = $dfv->valid; # warn Dumper $data;

    $data->{_request_id} = $request_id;

    my $rtn = $self->model('Outreach')->update_followup($data);
    return $rtn
        ? $self->error($rtn)
        : $self->redirect_after_edit_success('/report/outreach/' . $request_id);
}

# ------------------------------------------------------------------------------
sub do_reports_issued : Runmode {
    my $self = shift; $self->_debug_path($self->get_current_runmode);

    return $self->forbidden() unless $self->user_can('edit_outreach_data');

    my $rm = '/local_worklist?function_name=outreach_reports_to_issue';
    my $url = $self->query->url() . $rm;

    my @request_ids = $self->query->param('request_id');

    if (! @request_ids) {
        $self->flash( warning => $self->messages('worklist')->{no_request_ids} );
        $self->redirect($url);
    }
    else { # do update; return error if one occured:
        my $rtn = $self->model('Outreach')->do_reports_issued(\@request_ids);
        return $self->error($rtn) if $rtn;
    }
    return @request_ids > 1
        ? $self->redirect_after_edit_successes($rm)
        : $self->redirect_after_edit_success($rm);
}

# ------------------------------------------------------------------------------
sub do_pack_dispatch : Runmode {
    my $self = shift; $self->_debug_path($self->get_current_runmode);

    return $self->forbidden() unless $self->user_can('edit_outreach_data');

    my @request_ids = $self->query->param('request_id');

    unless (@request_ids) {
        $self->flash( warning => $self->messages('worklist')->{no_request_ids} );
        my $url = join '/', $self->query->url(),
            'local_worklist?function_name=outreach_pack_dispatch';
        return $self->redirect($url);
    }

    { # do update; return error if one occured:
        my $rtn = $self->model('Outreach')->do_pack_dispatch(\@request_ids);
        return $self->error($rtn) if $rtn;
    }

    { # get data for summary:
        my $data = $self->model('Request')->requests_summary_data(\@request_ids);
        $self->tt_params( requests => $data );
    }
    return $self->tt_process();
}

# ------------------------------------------------------------------------------
sub do_letter_dispatch : Runmode {
    my $self = shift; $self->_debug_path($self->get_current_runmode);

	my $notification = $self->param('id'); # warn $notification;

	my @request_ids = $self->query->param('request_id');

	my %data = (
		request_ids  => \@request_ids,
		notification => $notification,
	); # warn Dumper \%data;

    { # do update; return error if one occured:
        my $rtn = $self->model('Outreach')->do_letter_dispatch(\%data);
        return $self->error($rtn) if $rtn;
    }
    { # get data for summary:
        my $data = $self->model('Request')->requests_summary_data(\@request_ids);
        $self->tt_params( requests => $data );
    }
    return $self->tt_process();
}

# ------------------------------------------------------------------------------
sub report_labels : Runmode {
    my $self = shift; $self->_debug_path($self->get_current_runmode);

    my $vars = $self->query->Vars();

    my $to_datetime = sub { LIMS::Local::Utils::to_datetime_using_datecalc(@_) };

    my $from = &$to_datetime($vars->{date_from});
    my $to   = &$to_datetime($vars->{date_to});

    # require valid 'date_from' & 'date_to' params:
    unless ($from && $to) {
        $self->flash( error => $self->messages('outreach')->{missing_dates} );
        return $self->redirect( $self->query->url .
            '/local_worklist?function_name=outreach_report_labels' );
    }

    my $dates = { begin => $from, end => $to };

    my $data = $self->model('Outreach')->get_authorised_cases_data($dates);

    $self->tt_params(
        requests => $data,
        dates    => $dates,
    );
    return $self->tt_process();
}

# ------------------------------------------------------------------------------
sub do_report_labels : Runmode {
    my $self = shift; $self->_debug_path($self->get_current_runmode);

    my @patient_ids = $self->query->param('patient_id');

    my $labels = $self->model('Outreach')->report_labels(\@patient_ids);

	$self->tt_params( addresses => $labels );
    return $self->tt_process();
}

# ------------------------------------------------------------------------------
sub data_table : Runmode {
    my $self = shift; $self->_debug_path($self->get_current_runmode);

    my $param = $self->param('id');
    my $patient_id = $self->param('Id');

    my $patient = $self->model('Patient')->get_patient($patient_id);
    my $data = $self->model('Outreach')->get_chart_results($patient_id, $param);

    # convert dates to datetime:
    my $dt = sub { LIMS::Local::Utils::to_datetime_using_parsedate(@_) };
    $_->{created_at} = &$dt($_->{created_at}) for @$data;

    my $lab_param = $self->model('Outreach')->get_lab_param($param);

    $self->tt_params(
        data    => $data,
        param   => $lab_param,
        patient => $patient,
    );
    return $self->render_view($self->tt_template_name);
}

# ------------------------------------------------------------------------------
sub doubling_time : Runmode {
    my $self = shift; $self->_debug_path($self->get_current_runmode);

    my $param      = $self->param('id');
    my $patient_id = $self->param('Id');

    my $p = $self->query->Vars();

	unless ( $p->{to} && $p->{from} ) { # need both
		$self->tt_params( errs => 'require both A and B values' );
		return $self->forward('data_table');
	}

    my $data = $self->model('Outreach')->get_chart_results($patient_id, $param);

    # get 'to' and 'from' datasets from form loop count (minus 1 for array pos):
    my $from = $data->[$p->{from} - 1]; # warn Dumper $from;
    my $to   = $data->[$p->{to}   - 1]; # warn Dumper $to;

    my $dt = sub { LIMS::Local::Utils::to_datetime_using_parsedate(@_) };
    my $dt1 = &$dt($from->{created_at});
    my $dt2 = &$dt(  $to->{created_at});

    # Td = (t2 - t1) * log(2) / log(q2 / q1) # doubling time calculation:
    my $delta_days = $dt1->delta_days($dt2)->delta_days; # (t2 - t1) days
    my ($q1, $q2) = ($from->{result}, $to->{result});

    eval { # in case division by zero error
        my $t = $delta_days * log(2) / log( $q2 / $q1 ); # warn $t;
        my $d = DateTime::Duration->new( years => $t / 365 ); # to allow in_units('months')
        $self->tt_params( duration => $d );
    };

    $self->tt_params( eval_err => $@ ) if $@;
    $self->tt_params( q1 => $q1, q2 => $q2, delta_days => $delta_days );
    # round duration value callback:
    $self->tt_params( round => sub { LIMS::Local::Utils::round_value(@_) } );

    return $self->forward('data_table');
}

# ------------------------------------------------------------------------------
sub alternate_address : Runmode {
    my $self = shift; $self->_debug_path($self->get_current_runmode);

    return $self->forbidden() unless $self->user_can('edit_outreach_data');

    my $request_id = $self->param('id')
    || return $self->error('no request_id passed to '.$self->get_current_runmode);

    my $patient_id = $self->param('Id')
    || return $self->error('no patient_id passed to '.$self->get_current_runmode);

    my $q = $self->query;

    my $vars = $q->Vars();

    # can't use DFV check_rm() here as target is in another controller:
    my ($address, $post_code) = @$vars{qw(address post_code)}; # warn Dumper [$address, $post_code];
    unless ($address && $post_code) {
        $self->flash( error => $self->messages('outreach')->{alternate} );
        return $self->redirect( $q->url . '/report/outreach/' . $request_id);
    }

    $vars->{patient_id} = $patient_id;

    my $rtn = $self->model('Outreach')->update_alternate_address($vars);
    return $rtn
        ? $self->error($rtn)
        : $self->redirect_after_edit_success('/report/outreach/' . $request_id);
}

# ------------------------------------------------------------------------------
sub _get_datafile_results {
    my $self = shift; $self->_debug_path();

    my $result = $self->get_datafile_results(); # arrayref

	if ( @$result ) {
		return $result;
	}
	else {
		$self->flash( error => $self->messages('results')->{empty_result} );
		return 0;
	}
}

#-------------------------------------------------------------------------------
# check internal datafile refs (filename & patient ids) match
# sets $self->param_mismatch() arrayref on error:
sub _check_datafile_integrity {
	my $self = shift; $self->_debug_path();

	# check_datafile_integrity() returns names of any errors:
	if ( my $error_names = $self->check_datafile_integrity() ) {
		my @errs = map $self->messages('results')->{$_}, @$error_names;
		$self->flash( error => join '; ', @errs );
		return 0;
	}
	return 1;
}

1;