use strict;
use warnings;

use Test::More;
use Dios;

plan tests => 3;


multi func mfunc (Int :$n, Ref   :$r) { return 'Int, Ref';   }
multi func mfunc (Num :$n, Ref   :$r) { return 'Num, Ref';   }
multi func mfunc (Array :$r, Int :$n) { return 'Int, Array'; }
multi func mfunc (Num :$n, Hash  :$r) { return 'Num, Hash';  }
multi func mfunc (Int :$n, Any   :$r) { return 'Int, Any';   }

subtest 'mfunc' => sub {
    is mfunc(n=>1,   r=>\"scalar"), 'Int, Ref', 'Int, Ref';
    is mfunc(n=>1.1, r=>[1..3]   ), 'Num, Ref', 'Num, Ref';
    is mfunc(n=>1.1, r=>[1..3]   ), 'Num, Ref', 'Num, Ref';
    is mfunc(n=>1.1, r=>{a=>1}   ), 'Num, Hash','Num, Hash';
    is mfunc(n=>1,   r=>2        ), 'Int, Any', 'Int, Any';
    is mfunc(n=>1,   r=>{a=>1}   ), 'Int, Ref', 'Int, Ref';

#    is eval{ mfunc(n=>1, r=>{a=>1} ) }, undef, 'Ambiguous';
#    like $@, qr{\Qmfunc(Int,Ref)\E}xms, 'Correct message part 1';
#    like $@, qr{\Qmfunc(Num,Hash)\E}xms, 'Correct message part 2';

    is eval{ mfunc(r=>\1 ) }, undef, 'No match';
    like $@, qr{\QNo suitable 'mfunc' variant found\E}xms, 'Correct message';
};

class Demo {
    multi method mmeth (Int :$n, Ref   :$r) { return 'Int, Ref';   }
    multi method mmeth (Num :$n, Ref   :$r) { return 'Num, Ref';   }
    multi method mmeth (Int :$n, Array :$r) { return 'Int, Array'; }
    multi method mmeth (Num :$n, Hash  :$r) { return 'Num, Hash';  }
    multi method mmeth (Int :$n, Any   :$r) { return 'Int, Any';   }
};

subtest 'mmeth' => sub {
    my $obj = Demo->new;

    is $obj->mmeth(n=>1,   r=>\"scalar"), 'Int, Ref', 'Int, Ref';
    is $obj->mmeth(n=>1.1, r=>[1..3]   ), 'Num, Ref', 'Num, Ref';
    is $obj->mmeth(n=>1.1, r=>[1..3]   ), 'Num, Ref', 'Num, Ref';
    is $obj->mmeth(n=>1.1, r=>{a=>1}   ), 'Num, Hash','Num, Hash';
    is $obj->mmeth(n=>1,   r=>2        ), 'Int, Any', 'Int, Any';

    is $obj->mmeth(r=>{a=>1},  n=>1    ), 'Int, Ref', 'Ref, Int';

#    is eval{ $obj->mmeth(r=>{a=>1}, n=>1) }, undef, 'Ambiguous';
#    like $@, qr{\Qmmeth(Any,Int,Ref)\E}xms, 'Correct message part 1';
#    like $@, qr{\Qmmeth(Any,Num,Hash)\E}xms, 'Correct message part 2';

    is eval{ $obj->mmeth(r=>\1 ) }, undef, 'No match';
    like $@, qr{\QNo suitable 'mmeth' variant found\E}xms, 'Correct message';
};

class DemoDir is Demo {
    multi method mmeth (Int :$n, Hash  :$r) { return 'Int, Hash'; }
    multi method mmeth (Num :$n, Hash  :$r) { return 'NUM, HASH'; }
}

subtest 'derived mmeth' => sub {
    my $obj = DemoDir->new;

    is $obj->mmeth(n=>1,   r=>\"scalar"), 'Int, Ref', 'Int, Ref';
    is $obj->mmeth(n=>1.1, r=>[1..3]   ), 'Num, Ref', 'Num, Ref';
    is $obj->mmeth(n=>1.1, r=>[1..3]   ), 'Num, Ref', 'Num, Ref';
    is $obj->mmeth(n=>1.1, r=>{a=>1}   ), 'NUM, HASH','NUM, HASH';
    is $obj->mmeth(n=>1,   r=>2        ), 'Int, Any', 'Int, Any';

    is $obj->mmeth(n=>1, r=>{a=>1} ), 'Int, Hash', 'Int, Hash';

    is eval{ $obj->mmeth(r=>\1 ) }, undef, 'No match';
    like $@, qr{\QNo suitable 'mmeth' variant found\E}xms, 'Correct message';
};

done_testing();