Wainwright has noticed that he is no longer interested in doing the things he used to enjoy, he sleeps over 12 hours a day and feels hopeless about the future. which disorder would he likely be diagnosed as having

He probably has a case of depression. Such people usually lose interest in things that they used to enjoy, and sleep a lot, or at least want to sleep a lot, since insomnia can also sometime be a problem. Hopelessness about the future is usually followed also by anxiety about it.