module Lutaml::Model::ComparableModel::ClassMethods

def diff_tree
  if @obj1.nil? && @obj2.nil?
    @root_tree = Tree.new("Both objects are nil")
  elsif @obj1.nil?
    @root_tree = Tree.new("First object is nil")
    format_single_value(@obj2, @root_tree, @obj2.class.to_s)
  elsif @obj2.nil?
    @root_tree = Tree.new("Second object is nil")
    format_single_value(@obj1, @root_tree, @obj1.class.to_s)
  else
    traverse_diff do |name, type, value1, value2, is_last|
      format_attribute_diff(name, type, value1, value2, is_last)
    end
  end
  @root_tree.to_s
end

def diff_with_score(obj1, obj2, **options)
  context = DiffContext.new(obj1, obj2, **options)
  indent = options[:indent] || ""
  [context.calculate_diff_score, context.diff_tree(indent)]
end