package DDG::Goodie::PercentError;

use DDG::Goodie;

triggers start => "percent error", "% error", "%err", "%error", "percenterror", "percent err";

zci answer_type => "percent_error";
zci is_cached => 1;

primary_example_queries 'percent-error 34.5 35';
secondary_example_queries '%err 41 43', '%-error 2.88 2.82';
description 'find the percent error given accepted and experimental values';
name 'PercentError';
code_url 'https://github.com/duckduckgo/zeroclickinfo-goodies/blob/master/lib/DDG/Goodie/PercentError.pm';
category 'calculations';
topics 'math';
attribution twitter => 'crazedpsyc',
            cpan    => 'CRZEDPSYC' ;

handle remainder => sub {
    my $length = length($_);
#return unless $length == 2;

    my ( $acc, $exp ) = split /\s*[\s;,]\s*/, $_;
    return unless $acc =~ /^-?\d+?(?:\.\d+|)$/ && $exp =~ /^-?\d+?(?:\.\d+|)$/;

    my $diff = abs $acc - $exp;
    my $per = abs ($diff/$acc);
    my $err = $per*100;

    my $html = qq(Accepted: $acc Experimental: $exp Error: <a href="javascript:;" onclick="document.x.q.value='$per';document.x.q.focus();">$err%</a>);
    
    return "Accepted: $acc Experimental: $exp Error: $err%", html => $html;
};

1;