package RequestForm::Validate;

use Data::FormValidator;
use Data::FormValidator::Constraints qw(:closures);
use Data::Dumper::Concise;
use Moo;

use LIMS::Local::Utils;

sub validate {
    my $self = shift;
    my $vars = shift;
    
    my $defaults = _dfv_defaults();
    my $dfv = Data::FormValidator->new({}, $defaults);
    
    my $dfv_profile = dfv_profile(); # DEBUG($dfv_profile);
    my $results = $dfv->check($vars, $dfv_profile); # DEBUG($results);

    return $results;
}

sub dfv_profile {
    my @required = qw(
        last_name first_name nhs_number gender location referrer day month year
    );
    my @optional = qw( patient_number tb );
    return {
        required => \@required,
        optional => \@optional,
        dependencies => {
			doi => 'tb', 
		},
        constraint_methods => {
            nhs_number => _check_nhs_number(),
            year => _check_date(),
        },
		msgs => {
			constraints => { },
        },
    }
}

sub _dfv_defaults {
    return {
		missing_optional_valid => 1,
		filters => 'trim', # trims white space pre/post field param
		field_filters => { }, # use for forcing field formats eg foo => 'uc' 
		msgs => {
			any_errors 	=> 'dfv_errors', # default err__
			invalid    	=> 'INVALID', # default 'Invalid'
			missing 	=> 'MISSING', # default 'Missing'
			format 		=> '<div class="dfv-err">%s</div>',
		},
	};
}

sub _check_nhs_number {
	return sub {
		my $dfv = shift; # warn Dumper $dfv;
		my $nhs_number = shift || return 0; # warn 'NHSNo:'.$nhs_number;
		
		# check_nhsno() return true if valid:
		my $is_valid = LIMS::Local::Utils::check_nhsno( $nhs_number ); # warn $is_valid;
		return $is_valid;
    };   
}

sub _check_date {
	return sub {
		my $dfv = shift; # warn Dumper $dfv;

		my $data = $dfv->get_filtered_data; # warn Dumper $data;
        my $date = join '/', @{$data}{qw/day month year/}; # warn $date;
        my $is_valid = LIMS::Local::Utils::check_date($date); # warn $is_valid;
		return $is_valid;
	};    
}

1;