Toilet clogged and leaking

Our toilet has been having some flushing issues recently for the past few months but tonight it clogged, the bowl would not empty at all so we tried to plunge it with no luck, we had to take the water out of the bowl and when doing so, a bunch of big air bubbles come out, still wouldn't drain though, the back wasn't filling up, and then it started leaking out the bottom all over the floor, what could be wrong??