#! perl -slw
use strict;
use GD::Graph::lines;
use GD::Graph::colour qw(:colours :lists :files :convert);
use Data::Dump qw[ pp ];
use List::Util qw[ sum ];

our $MOVES ||= 4;
our $SRAND ||= 1;
our $EXTRA ||= 0;



my @rounds = $EXTRA ? ( 44, 90, 100, 110, 120 ) : ( 44, 90, 120 );
my @data = ( [], [], [] );
my @moving;

while( <DATA> ) {
    my( $hrs, $mins, $val ) = split ':|,';
    my $time = $hrs + $mins / 60;
    push @{ $data[ 0 ] }, $time;
    push @{ $data[ 1 ] }, $val;

    push @moving, $val;
    next if $#moving < ($MOVES / 2);
    shift @moving if @moving >= $MOVES;

    my $ave = sum( @moving ) / @moving;

    my $i = 0;
    ++$i while $rounds[ $i ] < $ave;
    $ave = abs( $ave - $rounds[ $i - 1 ] ) < abs( $ave - $rounds[ $i ] )
        ? $rounds[ $i - 1 ]
        : $rounds[ $i ];

    push @{ $data[ 2 ] }, $ave;

}

#pp \@data; <>;

my $file = '789655.png';

my $graph = GD::Graph::lines->new(3000, 768);

$graph->set(
    'bgclr' => 'white',
    'transparent' => 0,
    'interlaced' => 1,

    title             => 'Some simple graph',

    x_label           => 'X Label',
    x_max_value       => 24,
    x_min_value       => 0,
    x_tick_number     => 24,

    y_label           => 'Y label',
    y_max_value       => 180,
    y_min_value       => 0,
    y_tick_number     => 12,
    y_label_skip      => 2,
    y_long_ticks      => 1,

) or die $graph->error;

my $gd = $graph->plot(\@data) or die $graph->error;

open IMG, '>', $file or die $!;
binmode IMG;
print IMG $gd->png;
close IMG;

system $file; ## Load the graph into the local default image viewer


__DATA__