#
# parsedate2.rb
# written by Shin'ya Adzumi/ICHIGO-DENPA-CLUB
#

require 'parsedate'
require 'timezone'

module ParseDate
  def to_t(str,*base)
    basetime,basezone = [nil,nil]
    for b in base
      if( b.kind_of?(Time) ) then
        if( basetime.nil? ) then
          basetime = b
        else
          raise TypeError,"wrong argument type #{b.inspect}"
        end
      end
      if( b.kind_of?(String) ) then
        if( basezone.nil? ) then
          basezone = b
        else
          raise TypeError,"wrong argument type #{b.inspect}"
        end
      end
    end
    basetime = Time::now.gmtime if basetime.nil?
    basezone = Time::local(0).zone if basezone.nil?

    d = parsedate(str)
    raise ArgumentError,'invalid string' if( d[1].nil? )
    d[0] = basetime.year if( d[0].nil? )
    d[6] = basezone if( d[6].nil? )

    Time::gm(d[0],d[1],d[2],d[3],d[4],d[5]) - TimeZone::to_s(d[6])
  end

  module_function :to_t
end

if __FILE__ == $0 then
  p ParseDate::to_t ARGV[0],Time::now.gmtime,"JST"
end