If Lucifer aka Satan is the prince of darkness, can God be entitled the king of everything including darkness?

You can go through the Hebrew Scriputres known to Chrestus worshipers as "Old Testament" and see the concept of God changing from the guy who does everything to the guy who does good while a bad guy does the evil. This change was effected by exposure to Persian dualism in the Babylonian Exile. Look, for example, at the two stories of the Davidic census. One says God told him to do it, the other says DE DEBBIL told him to do it. One was written before, one after, the Exile.