use Test::More;
use strict;
use warnings;

plan tests => 23;

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

use Slic3r;
use Slic3r::Geometry qw(PI polygon_is_convex
    chained_path epsilon scale);

#==========================================================

my $line1 = [ [5, 15], [30, 15] ];
my $line2 = [ [10, 20], [10, 10] ];
is_deeply Slic3r::Geometry::line_intersection($line1, $line2, 1)->arrayref, [10, 15], 'line_intersection';

#==========================================================

$line1 = [ [73.6310778185108/0.0000001, 371.74239268924/0.0000001], [73.6310778185108/0.0000001, 501.74239268924/0.0000001] ];
$line2 = [ [75/0.0000001, 437.9853/0.0000001], [62.7484/0.0000001, 440.4223/0.0000001] ];
isnt Slic3r::Geometry::line_intersection($line1, $line2, 1), undef, 'line_intersection';

#==========================================================

{
    my $polygon = Slic3r::Polygon->new(
        [45919000, 515273900], [14726100, 461246400], [14726100, 348753500], [33988700, 315389800], 
        [43749700, 343843000], [45422300, 352251500], [52362100, 362637800], [62748400, 369577600], 
        [75000000, 372014700], [87251500, 369577600], [97637800, 362637800], [104577600, 352251500], 
        [107014700, 340000000], [104577600, 327748400], [97637800, 317362100], [87251500, 310422300], 
        [82789200, 309534700], [69846100, 294726100], [254081000, 294726100], [285273900, 348753500], 
        [285273900, 461246400], [254081000, 515273900],
    );
    
    # this points belongs to $polyline
    # note: it's actually a vertex, while we should better check an intermediate point
    my $point = Slic3r::Point->new(104577600, 327748400);
    
    local $Slic3r::Geometry::epsilon = 1E-5;
    is_deeply Slic3r::Geometry::polygon_segment_having_point($polygon, $point)->pp, 
        [ [107014700, 340000000], [104577600, 327748400] ],
        'polygon_segment_having_point';
}

#==========================================================

{
    my $point = Slic3r::Point->new(736310778.185108, 5017423926.8924);
    my $line = Slic3r::Line->new([627484000, 3695776000], [750000000, 3720147000]);
    is Slic3r::Geometry::point_in_segment($point, $line), 0, 'point_in_segment';
}

#==========================================================

{
    my $point = Slic3r::Point->new(736310778.185108, 5017423926.8924);
    my $line = Slic3r::Line->new([627484000, 3695776000], [750000000, 3720147000]);
    is Slic3r::Geometry::point_in_segment($point, $line), 0, 'point_in_segment';
}

#==========================================================

my $polygons = [
    Slic3r::Polygon->new( # contour, ccw
        [45919000, 515273900], [14726100, 461246400], [14726100, 348753500], [33988700, 315389800], 
        [43749700, 343843000], [45422300, 352251500], [52362100, 362637800], [62748400, 369577600], 
        [75000000, 372014700], [87251500, 369577600], [97637800, 362637800], [104577600, 352251500], 
        [107014700, 340000000], [104577600, 327748400], [97637800, 317362100], [87251500, 310422300], 
        [82789200, 309534700], [69846100, 294726100], [254081000, 294726100], [285273900, 348753500], 
        [285273900, 461246400], [254081000, 515273900],

    ),
    Slic3r::Polygon->new( # hole, cw
        [75000000, 502014700], [87251500, 499577600], [97637800, 492637800], [104577600, 482251500], 
        [107014700, 470000000], [104577600, 457748400], [97637800, 447362100], [87251500, 440422300], 
        [75000000, 437985300], [62748400, 440422300], [52362100, 447362100], [45422300, 457748400], 
        [42985300, 470000000], [45422300, 482251500], [52362100, 492637800], [62748400, 499577600],
    ),
];

#==========================================================

{
    my $p1 = [10, 10];
    my $p2 = [10, 20];
    my $p3 = [10, 30];
    my $p4 = [20, 20];
    my $p5 = [0,  20];
    
    is Slic3r::Geometry::angle3points($p2, $p3, $p1),  PI(),   'angle3points';
    is Slic3r::Geometry::angle3points($p2, $p1, $p3),  PI(),   'angle3points';
    is Slic3r::Geometry::angle3points($p2, $p3, $p4),  PI()/2*3, 'angle3points';
    is Slic3r::Geometry::angle3points($p2, $p4, $p3),  PI()/2, 'angle3points';
    is Slic3r::Geometry::angle3points($p2, $p1, $p4),  PI()/2, 'angle3points';
    is Slic3r::Geometry::angle3points($p2, $p1, $p5),  PI()/2*3, 'angle3points';
}

{
    my $p1 = [30, 30];
    my $p2 = [20, 20];
    my $p3 = [10, 10];
    my $p4 = [30, 10];
    
    is Slic3r::Geometry::angle3points($p2, $p1, $p3), PI(),       'angle3points';
    is Slic3r::Geometry::angle3points($p2, $p1, $p4), PI()/2*3,   'angle3points';
    is Slic3r::Geometry::angle3points($p2, $p1, $p1), 2*PI(),     'angle3points';
}

#==========================================================

{
    my $cw_square = [ [0,0], [0,10], [10,10], [10,0] ];
    is polygon_is_convex($cw_square), 0, 'cw square is not convex';
    is polygon_is_convex([ reverse @$cw_square ]), 1, 'ccw square is convex';
    
    my $convex1 = [ [0,0], [10,0], [10,10], [0,10], [0,6], [4,6], [4,4], [0,4] ];
    is polygon_is_convex($convex1), 0, 'concave polygon';
}

#==========================================================

{
    my $polyline = Slic3r::Polyline->new([0, 0], [10, 0], [20, 0]);
    is_deeply [ map $_->pp, @{$polyline->lines} ], [
        [ [0, 0], [10, 0] ],
        [ [10, 0], [20, 0] ],
    ], 'polyline_lines';
}

#==========================================================

{
    my $polygon = Slic3r::Polygon->new([0, 0], [10, 0], [5, 5]);
    my $result = $polygon->split_at_index(1);
    is ref($result), 'Slic3r::Polyline', 'split_at_index returns polyline';
    is_deeply $result->pp, [ [10, 0], [5, 5], [0, 0], [10, 0] ], 'split_at_index';
}

#==========================================================

{
    my $bb = Slic3r::Geometry::BoundingBox->new_from_points([ map Slic3r::Point->new(@$_), [0, 1], [10, 2], [20, 2] ]);
    $bb->scale(2);
    is_deeply $bb->extents, [ [0,40], [2,4] ], 'bounding box is scaled correctly';
}

#==========================================================

{
    my $line = Slic3r::Line->new([10,10], [20,10]);
    is $line->grow(5)->[0]->area, Slic3r::Polygon->new([10,5], [20,5], [20,15], [10,15])->area, 'grow line';
}

#==========================================================

{
    # if chained_path() works correctly, these points should be joined with no diagonal paths
    # (thus 26 units long)
    my @points = map Slic3r::Point->new_scale(@$_), [26,26],[52,26],[0,26],[26,52],[26,0],[0,52],[52,52],[52,0];
    my @ordered = @points[@{chained_path(\@points, $points[0])}];
    ok !(grep { abs($ordered[$_]->distance_to($ordered[$_+1]) - scale 26) > epsilon } 0..$#ordered-1), 'chained_path';
}

#==========================================================