structure of new company

1- we have a company it represent one legal entity.

2- it has 3 branches.

3- i need an income statement for each branch.

4- i need each branch didn't see data another branch in pur,ar and ap.

5- also in inventory each branch have its inventory it may be transfer items from branch to branch.

6- but  branch didn't see data to another branch.

what is the best structure ?

for coa how i design it ?