I have installed Bahmni, I want to generate a unique visit id for every OPD and IPD visit

Bahmni: VB 7.0

Question: Recently, I have installed Bahmni and I want to customize it a bit. I want to add unique visit ID for each visit and display it in patient visits and the report we print for patients for every visit. I have tried customizing it using OpenMRS but it seems there is no option for that. Can someone assist in a workaround possible for this?