require 'sms_broker/setup'
require 'sms_broker/exceptions/invalid_setup'

module SmsBroker

  module Configuration

    @@configuration = nil

    def default_service
      configuration[:default_service]
    end

    def clear_setup
      @@configuration = nil
    end

    def configuration
      exception = \
        Exceptions::InvalidSetup.new('setup does not exists')

      @@configuration || (raise exception)
    end

    def setup(&block)
      setup = Setup.new
      yield setup if block_given?

      @@configuration = setup.options

      setup
    end

    def setup!(&block)
      setup = Setup.new
      yield setup if block_given?

      unless setup.valid?
        exception = \
          Exceptions::InvalidSetup.new('setup is invalid, check exception.errors')

        exception.errors = setup.errors

        raise exception
      end

      @@configuration = setup.options

      setup
    end

    extend self

  end

end