If you want to re veg you can cut all the buds off and enjoy them. It WILL veg again if put under 18 hour light. Just leave some leaves and it will be fine. You could even take clones from it before forcing flower again. Give it a few weeks under 18 hour light and you'll be amazed what happens. Also the outdoor/indoor thing shouldn't be a big deal, just don't introduce uptside bugs into an established growroom.
Good luck