Predetermined future vs. Free will in Buddhism

In Buddhism we are encouraged to make the right choices, make the right effort, keep morality etc. it feels like our future is open. Kamma also points to that direction. The future will be created according to our actions! On the other hand, on several occasions, the Buddha spoke about the future as if it were predetermined. A few examples: Person A will become a Buddha, true Dhamma will be replaced, people will live only 10 years, Maitreya Buddha will come etc. It can be confusing! Is the future open? Do we know that some things will happen no matter what? Are they irreversible?