use strict;
use warnings;

package Test::Deep::Methods;

use Test::Deep::Cmp;
use Scalar::Util;

sub init
{
	my $self = shift;

	# get them all into [$name,@args] => $value format
	my @methods;
	while (@_)
	{
		my $name = shift;
		my $value = shift;
		push(@methods,
			[
				ref($name) ? $name : [ $name ],
				$value
			]
		);
	}
	$self->{methods} = \@methods;
}

sub descend
{
	my $self = shift;
	my $got = shift;

	my $data = $self->data;

	foreach my $method (@{$self->{methods}})
	{
		$data->{method} = $method;

		my ($call, $exp_res) = @$method;
		my ($name, @args) = @$call;

    my $got_res;
    if (! eval { $got_res = $self->call_method($got, $call); 1 }) {
      die $@ unless $@ =~ /\ACan't locate object method "\Q$name"/;
      $got_res = $Test::Deep::DNE;
    }

		next if Test::Deep::descend($got_res, $exp_res);

		return 0;
	}

	return 1;
}

sub call_method
{
	my $self = shift;
	my ($got, $call) = @_;
	my ($name, @args) = @$call;

	return $got->$name(@args);
}

sub render_stack
{
	my $self = shift;
	my ($var, $data) = @_;

	my $method = $data->{method};
	my ($call, $expect) = @$method;
	my ($name, @args) = @$call;

	my $args = @args ? "(".join(", ", @args).")" : "";
	$var .= "->$name$args";

	return $var;
}

1;
