when arriving home at midnight

The more your project needs complex logic, the more you should use reusable module which must be guaranteed. So, your code should not be large. You should endeavor for small size code. I know your code may be too complex. But if you can guarantee your reusable module, you don't have to see that code again. And as using reusable modules, your coding speed can be speedy even if there's complex logic still. How wonderful it is when thinking that usually as time flows, coding speed is slower.