#!/usr/bin/perl

use strict;
use warnings;

use Slic3r::XS;
use Test::More tests => 21;

my $points = [
    [100, 100],
    [200, 100],
    [200, 200],
];

my $polyline = Slic3r::Polyline->new(@$points);

is_deeply $polyline->pp, $points, 'polyline roundtrip';

is ref($polyline->arrayref), 'ARRAY', 'polyline arrayref is unblessed';
isa_ok $polyline->[0], 'Slic3r::Point::Ref', 'polyline point is blessed';

my $lines = $polyline->lines;
is_deeply [ map $_->pp, @$lines ], [
    [ [100, 100], [200, 100] ],
    [ [200, 100], [200, 200] ],
], 'polyline lines';

$polyline->append_polyline($polyline->clone);
is_deeply $polyline->pp, [ @$points, @$points ], 'append_polyline';

{
    my $len = $polyline->length;
    $polyline->clip_end($len/3);
    ok abs($polyline->length - ($len-($len/3))) < 1, 'clip_end';
}

{
    my $polyline = Slic3r::Polyline->new(
        [0,0], [20,0], [50,0], [80,0], [100,0],
    );
    $polyline->simplify(2);
    is_deeply $polyline->pp, [ [0,0], [100,0] ], 'Douglas-Peucker';
}

{
    my $polyline = Slic3r::Polyline->new(
        [0,0], [50,50], [100,0], [125,-25], [150,50],
    );
    $polyline->simplify(25);
    is_deeply $polyline->pp, [ [0, 0], [50, 50], [125, -25], [150, 50] ], 'Douglas-Peucker';
}

{
    my $polyline = Slic3r::Polyline->new(
        [0,0], [100,0], [50,10],
    );
    $polyline->simplify(25);
    is_deeply $polyline->pp, [ [0,0], [100,0], [50,10] ], 'Douglas-Peucker uses shortest distance instead of perpendicular distance';
}

{
    my $polyline = Slic3r::Polyline->new(@$points);
    is $polyline->length, 100*2, 'length';
    $polyline->extend_end(50);
    is $polyline->length, 100*2 + 50, 'extend_end';
    $polyline->extend_start(50);
    is $polyline->length, 100*2 + 50 + 50, 'extend_start';
}

{
    my $polyline = Slic3r::Polyline->new(@$points);
    my $p1 = Slic3r::Polyline->new;
    my $p2 = Slic3r::Polyline->new;
    my $point = Slic3r::Point->new(150, 100);
    $polyline->split_at($point, $p1, $p2);
    is scalar(@$p1), 2, 'split_at';
    is scalar(@$p2), 3, 'split_at';
    ok $p1->last_point->coincides_with($point), 'split_at';
    ok $p2->first_point->coincides_with($point), 'split_at';
}

{
    my $polyline = Slic3r::Polyline->new(@$points[0,1,2,0]);
    my $p1 = Slic3r::Polyline->new;
    my $p2 = Slic3r::Polyline->new;
    $polyline->split_at($polyline->first_point, $p1, $p2);
    is scalar(@$p1), 1, 'split_at';
    is scalar(@$p2), 4, 'split_at';
}

{
    my $polyline = Slic3r::Polyline->new(
        map [$_,10], (0,10,20,30,40,50,60)
    );
    {
        my $expolygon = Slic3r::ExPolygon->new(Slic3r::Polygon->new(
            [25,0], [55,0], [55,30], [25,30],
        ));
        my $p = $polyline->clone;
        $p->simplify_by_visibility($expolygon);
        is_deeply $p->pp, [
            map [$_,10], (0,10,20,30,50,60)
        ], 'simplify_by_visibility()';
    }
    {
        my $expolygon = Slic3r::ExPolygon->new(Slic3r::Polygon->new(
            [-15,0], [75,0], [75,30], [-15,30],
        ));
        my $p = $polyline->clone;
        $p->simplify_by_visibility($expolygon);
        is_deeply $p->pp, [
            map [$_,10], (0,60)
        ], 'simplify_by_visibility()';
    }
    {
        my $expolygon = Slic3r::ExPolygon->new(Slic3r::Polygon->new(
            [-15,0], [25,0], [25,30], [-15,30],
        ));
        my $p = $polyline->clone;
        $p->simplify_by_visibility($expolygon);
        is_deeply $p->pp, [
            map [$_,10], (0,20,30,40,50,60)
        ], 'simplify_by_visibility()';
    }
}

__END__