#
# (c) Jan Gehring <jan.gehring@gmail.com>
#
# vim: set ts=2 sw=2 tw=0:
# vim: set expandtab:

package Rex::Helper::INI;

use strict;
use warnings;

our $VERSION = '1.6.0'; # VERSION

BEGIN { String::Escape->use('string2hash'); }

sub parse {
  my (@lines) = @_;
  my $ini;

  my $section;
  for (@lines) {
    chomp;
    s/\n|\r//g;

    (/^#|^;|^\s*$/) && (next);

    if ( /^\[(.*)\]/ && !/^\[(\d+((?:,)|(?:\.\.))*)+(\/\d+)*\]/ ) {

      # check for inheritance
      $section = $1;
      $ini->{$section} = {};

      if ( $section =~ /</ ) {
        delete $ini->{$section};
        my @inherit = split( /</, $section );
        s/^\s*|\s*$//g for @inherit;
        $section = shift @inherit;

        for my $is (@inherit) {
          for my $ik ( keys %{ $ini->{$is} } ) {
            $ini->{$section}->{$ik} = $ini->{$is}->{$ik};
          }
        }
      }

      next;
    }

    my ( $key, $val ) = split( /[= ]/, $_, 2 );
    $key =~ s/^\s*|\s*$//g if $key;
    $val =~ s/^\s*|\s*$//g if $val;

    my @splitted;
    if ( !$val ) {
      $val      = $key;
      @splitted = ($key);
    }

    # commented out due to #184
    else {
      #@splitted = split(/\./, $key);
      @splitted = ($key);
    }

    my $ref  = $ini->{$section};
    my $last = pop @splitted;
    for my $sub (@splitted) {

      unless ( exists $ini->{$section}->{$sub} ) {
        $ini->{$section}->{$sub} = {};
      }

      $ref = $ini->{$section}->{$sub};
    }

    # include other group
    if ( $key =~ m/^\@(.*)/ ) {
      for my $ik ( keys %{ $ini->{$1} } ) {
        $ini->{$section}->{$ik} = $ini->{$1}->{$ik};
      }
      next;
    }

    if ( $val =~ m/\$\{(.*)\}/ ) {
      my $var_name = $1;
      my $ref      = $ini;
      my @splitted = split( /\./, $var_name );
      for my $s (@splitted) {
        $ref = $ref->{$s};
      }

      $val = $ref;
    }

    if ( $val =~ m/=/ ) {
      $val = { string2hash($val) };
    }

    $ref->{$last} = $val;

  }

  return $ini;
}

1;
