class RubyXL::WorkbookRoot

def self.default
  obj = self.new
  obj.document_properties    = RubyXL::DocumentPropertiesFile.new
  obj.core_properties        = RubyXL::CorePropertiesFile.new
  obj.relationship_container = RubyXL::OOXMLRelationshipsFile.new
  obj.content_types          = RubyXL::ContentTypes.new
  obj
end

def self.parse_file(xl_file_path, opts)
  begin
    ::Zip::File.open(xl_file_path) { |zip_file|
      root = self.new
      root.filepath = xl_file_path
      root.content_types = RubyXL::ContentTypes.parse_file(zip_file)
      root.load_relationships(zip_file, OOXMLTopLevelObject::ROOT)
      root.workbook.root = root
      root
    }
  rescue ::Zip::Error => e
    raise e, "XLSX file format error: #{e}", e.backtrace
  end
end

def related_objects
  [ content_types, thumbnail, core_properties, document_properties, custom_properties, workbook ]
end

def stream
  stream = Zip::OutputStream.write_buffer { |zipstream|
    self.rels_hash = {}
    self.relationship_container.owner = self
    collect_related_objects.compact.each { |obj|
      puts "<-- DEBUG: adding relationship to #{obj.class}" if @@debug
      obj.root = self if obj.respond_to?(:root=)
      self.rels_hash[obj.class] ||= []
      self.rels_hash[obj.class] << obj
    }
    self.rels_hash.keys.sort_by{ |c| c::SAVE_ORDER }.each { |klass|
      puts "<-- DEBUG: saving related #{klass} files" if @@debug
      self.rels_hash[klass].each { |obj|
        puts "<-- DEBUG:   > #{obj.xlsx_path}" if @@debug
        obj.add_to_zip(zipstream)
      }
    }
  }
  stream.rewind
  stream
end

def xlsx_path
  OOXMLTopLevelObject::ROOT
end