Whatsapp chatbot

I need Ai Whatsapp chatbot ,Flow based ,Customer can design his flow ,Its means automated reply + Web+Facebook+instagram ,With chatbot dashboard where i can see all conversations to be integrated with meta to configure WhatsApp number + Able to send attached in conversation + Able to transfer conversation .

I NEED SOURCE CODE NOT READY SCRIPTS ,PLEASE DONT SEND ME MANYCHAT AND OTHER READY SCRIPT TO BE INSTALLED ,I NEED PROGRAMMING .

If you have ready one to be developed or customized its ok also ,