What are the conceptual foundations for integrating a site with 1C?

Question

1C

Hello.
I will make a reservation right away that the question partly stems from ignorance of accounting in the required volume.
There is 1C Accounting and an online store. It is technically possible to integrate one with the other in many ways. How many people - so many ways. But what are the basic criteria for this very integration? What is the integration in the most complete version, what items should be in the checklist, after going through which and saying that the site satisfies everyone, can we say that the integration has been made? If the question is too chaotic, then I will give my limited vision.
If you break down the activities of an online store into processes, make a decomposition in a very basic version, then we can say that its life consists of the following processes:

1. buying goods from a supplier
   
2. sale of goods to the final consumer
   

After each of the processes, synchronization of data on the site and in the accounting program is required, because. each process entails a number of changes in the online store system (in the broadest sense).
The life cycle of a product (very simplified) from its appearance in an online store to sale is as follows:

• The seller buys the goods from the supplier. Appropriate accounting documents are prepared.
  
• The goods are entered into the accounting program for accounting (the quantity of goods, description, photo are entered).
  
• The product is entered into the database of the online store so that the buyer can buy and see it (the main information is entered and additional information is entered - one that is not in 1C).
  
• The user places an order, the goods are placed in reserve. At the same time, something must happen in the accounting program.
  
• The buyer buys the goods.
  
• Something must be happening in the accounting program.
  

With all these actions (including those not described here), there must be some kind of data exchange between the two systems: the site and the accounting program. What is a comprehensive list of sync steps?
Why am I asking? I'm going to write a module for a self-written online store, I understand the topic.

Answer 1

1. I would advise you to decide where the product data is entered, and it should be one place - the source of this information. Think over the synchronization fields so that it searches normally and does not produce duplicates. This is a fairly widespread problem. I would make a source 1s.
2. It seems to me that you only need to make a sale in conjunction with a 1c-site. Why do you need to do something when purchasing, except to upload new positions to the site that did not exist before.
3. The rest on the site for display to the user, some recommend not to detail to one (no, few, many) - that's enough.
all IMHO.