my ex showed up at court high, lost visitations but now is taking me back to get them back. this all happened 3 weeks ago. says he did detox

He can't just say he did detox - he has to prove it.  If he went through some kind of program, then he needs to bring documentation.  Also, if he lost visitation, the court is not just going to give it back.  You should ask for no visitation, but if the court is going to give something, say that he needs to have supervised visitation until he can prove he's through detox, and to also have parenting classes so that he can learn how to be better to his kids.  Ask that your husband be tested, some courts will do the drug test right there in court with either the hair sample or cheek swab.  Make some kind of provision that he has to go for periodic tests, and if he fails a test, then no visitation even if its supervised, and all further visitation is suspended.  Good luck !