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require "googleauth/signet"
require "googleauth/credentials_loader"
require "multi_json"

module Google
  module Auth
    # Small utility for normalizing scopes into canonical form
    module ScopeUtil
      ALIASES = {
        "email"   => "https://www.googleapis.com/auth/userinfo.email",
        "profile" => "https://www.googleapis.com/auth/userinfo.profile",
        "openid"  => "https://www.googleapis.com/auth/plus.me"
      }.freeze

      def self.normalize scope
        list = as_array scope
        list.map { |item| ALIASES[item] || item }
      end

      def self.as_array scope
        case scope
        when Array
          scope
        when String
          scope.split " "
        else
          raise "Invalid scope value. Must be string or array"
        end
      end
    end
  end
end