use Test::More tests => 5;
use strict;
use warnings;

BEGIN {
    use FindBin;
    use lib "$FindBin::Bin/../lib";
}

use List::Util qw(first);
use Slic3r;
use Slic3r::Test qw(_eq);

{
    my $config = Slic3r::Config->new_from_defaults;

    my $test = sub {
        my ($conf) = @_;
        $conf ||= $config;
    
        my $print = Slic3r::Test::init_print('20mm_cube', config => $conf);
    
        my @z = ();
        my @increments = ();
        Slic3r::GCode::Reader->new->parse(Slic3r::Test::gcode($print), sub {
            my ($self, $cmd, $args, $info) = @_;
        
            if ($info->{dist_Z}) {
                push @z, 1*$args->{Z};
                push @increments, $info->{dist_Z};
            }
        });
    
        fail 'wrong first layer height'
            if $z[0] ne $config->get_value('first_layer_height') + $config->z_offset;
    
        fail 'wrong second layer height'
            if $z[1] ne $config->get_value('first_layer_height') + $config->get_value('layer_height') + $config->z_offset;
    
        fail 'wrong layer height'
            if first { !_eq($_, $config->layer_height) } @increments[1..$#increments];
    
        1;
    };

    $config->set('start_gcode',             '');  # to avoid dealing with the nozzle lift in start G-code
    $config->set('layer_height', 0.3);
    $config->set('first_layer_height', 0.2);
    ok $test->(), "absolute first layer height";

    $config->set('first_layer_height', '60%');
    ok $test->(), "relative first layer height";

    $config->set('z_offset', 0.9);
    ok $test->(), "positive Z offset";

    $config->set('z_offset', -0.8);
    ok $test->(), "negative Z offset";
}

{
    my $config = Slic3r::Config->new;
    $config->set('fill_density', 0);  # just for making the test faster
    my $print = Slic3r::Test::init_print('20mm_cube', config => $config, scale => 2);
    
    my @z = ();
    Slic3r::GCode::Reader->new->parse(Slic3r::Test::gcode($print), sub {
        my ($self, $cmd, $args, $info) = @_;
        
        if ($info->{dist_Z}) {
            push @z, 1*$args->{Z};
        }
    });
    ok $z[-1] > 20*1.8 && $z[-1] < 20*2.2, 'resulting G-code has reasonable height';
}

__END__