PIC12F675 Changeover and High Voltage Detection

Hello able engineers! Greetings to all!

Please I need someone to code PIC12F675 with the description on the schematic provided below.

PLEASE THE PINS OF THE MCU CAN BE EXCHANGED TO ANY WAY IT WILL BE BETTER IF THE WAY I CHOSE THEM IS WRONG

I want to use this to interface with a device in my remote farm. I have two sources of Power supply there. I just want to use MCU because cost is insignificant. I just don't want to use analogue.

Thanks so much in advance.