use strict;
use warnings;

package Test::Deep::Regexp;

use Test::Deep::Cmp;
use Test::Deep::RegexpMatches;

sub init
{
  my $self = shift;

  my $val = shift;

  $val = ref $val ? $val : qr/$val/;

  $self->{val} = $val;

  if (my $matches = shift)
  {
    $self->{matches} = Test::Deep::regexpmatches($matches, $val);

    $self->{flags} = shift || "";
  }
}

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

  my $re = $self->{val};
  if (my $match_exp = $self->{matches})
  {
    my $flags = $self->{flags};
    my @match_got;
    if ($flags eq "g")
    {
      @match_got = $got =~ /$re/g;
    }
    else
    {
      @match_got = $got =~ /$re/;
    }

    if (@match_got)
    {
      return Test::Deep::descend(\@match_got, $match_exp);
    }
    else
    {
      return 0;
    }
  }
  else
  {
    return ($got =~ $re) ? 1 : 0;
  }
}

sub diag_message
{
  my $self = shift;

  my $where = shift;

  return "Using Regexp on $where";
}

sub render_stack1
{
  my $self = shift;

  my $stack = shift;
  return "($stack =~ $self->{regex})";
}

sub renderExp
{
  my $self = shift;

  return "$self->{val}";
}

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

  if (defined (my $class = Scalar::Util::blessed($got)))
  {
    my $ostr = qq{$got};
    if ($ostr ne overload::StrVal($got))
    {
      return qq{'$ostr' (instance of $class)};
    }
  }

  return Test::Deep::render_val($got);
}

1;