class RuboCop::Cop::Gemspec::DependencyVersion

def add_dependency_method?(method_name)
  ADD_DEPENDENCY_METHODS.include?(method_name)
end

def allowed_gem?(node)
  allowed_gems.include?(node.first_argument.str_content)
end

def allowed_gems
  Array(cop_config['AllowedGems'])
end

def forbidden_offense?(node)
  return false unless forbidden_style?
  includes_version_specification?(node) || includes_commit_reference?(node)
end

def forbidden_style?
  style == :forbidden
end

def match_block_variable_name?(receiver_name)
  gem_specification(processed_source.ast) do |block_variable_name|
    return block_variable_name == receiver_name
  end
end

def message(_range)
  if required_style?
    REQUIRED_MSG
  elsif forbidden_style?
    FORBIDDEN_MSG
  end
end

def offense?(node)
  required_offense?(node) || forbidden_offense?(node)
end

def on_send(node)
  return unless add_dependency_method_declaration?(node)
  return if allowed_gem?(node)
  if offense?(node)
    add_offense(node)
    opposite_style_detected
  else
    correct_style_detected
  end
end

def required_offense?(node)
  return false unless required_style?
  !includes_version_specification?(node) && !includes_commit_reference?(node)
end

def required_style?
  style == :required
end

def version_specification?(expression)
  expression.match?(VERSION_SPECIFICATION_REGEX)
end