#!/usr/bin/env perl

# problems-filed-graph:
# Plot graph of FixMyStreet problem report creation rate.
#
# Copyright (c) 2014 UK Citizens Online Democracy. All rights reserved.
# Email: matthew@mysociety.org. WWW: http://www.mysociety.org

use strict;
use warnings;
require 5.8.0;

my $DIR;
BEGIN {
    use File::Basename qw(dirname);
    use File::Spec;
    $DIR = dirname(dirname(File::Spec->rel2abs($0)));
    require "$DIR/setenv.pl";
}

use File::Temp qw(tempfile);

use FixMyStreet::App;

my %config = (
    gplot_output => "set terminal png font 'Vera.ttf' 9 size 1200,600",
    extension => '.png',
);

my ($fh, $source) = tempfile("fms-report-rate-graph-data-nonwmc-XXXXXXXXXX", UNLINK => 1);

my @entries = FixMyStreet::App->model('DB::Problem')->search({
        state => { -not_in => [ 'unconfirmed', 'hidden', 'partial' ] },
    }, {
        columns => [
            { 'date' => { date => 'created' } },
            { 'count' => { count => '*' } }
        ],
        group_by => [ 'date' ],
        order_by => [ 'date' ],
    }
);
@entries = map { { $_->get_columns } } @entries;
foreach (@entries) {
    $fh->print($_->{date}, ' ', $_->{count}, "\n");
}

my $gp = <<END;
    unset border
    $config{gplot_output}

    set xdata time;
    set timefmt "%Y-%m-%d";
    set format x "%b %Y"
    unset xlabel

    set ylabel "problems filed / calendar day"
    set xtics nomirror
    set ytics nomirror

    n = 0
    plot "$source" using 1:2 with lines axes x1y2 lt 3 title "FixMyStreet problem reports"
END

open(my $gnuplot, '|-', "GDFONTPATH=/usr/share/fonts/truetype/ttf-bitstream-vera gnuplot > $DIR/web/fms-live-line$config{extension} 2> /dev/null") or die $!;
$gnuplot->print($gp);
close $gnuplot;