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_zip_file(zip_file)
  root = self.new
  root.content_types = RubyXL::ContentTypes.parse_file(zip_file, ContentTypes::XLSX_PATH)
  root.load_relationships(zip_file, OOXMLTopLevelObject::ROOT)
  wb = root.workbook
  wb.root = root
  wb.sheets.each_with_index { |sheet, i|
    sheet_obj = wb.relationship_container.related_files[sheet.r_id]
    wb.worksheets[i] = sheet_obj # Must be done first so the sheet becomes aware of its number
    sheet_obj.workbook = wb
    sheet_obj.sheet_name = sheet.name
    sheet_obj.sheet_id = sheet.sheet_id
    sheet_obj.state = sheet.state
  }
  root
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].select! { |obj|
        puts "<-- DEBUG:   > #{obj.xlsx_path}" if @@debug
        obj.add_to_zip(zipstream)
      }
    }
  }
  stream.rewind
  stream
end

def xlsx_path
  OOXMLTopLevelObject::ROOT
end