// By default createRelationalObject() looks for
// the prop "id" to use as a primary key.
// Optionally, if "id" is not the primary key of the object, you can specify what to use as a primary key like this
/// const user = createRelationalObject("user", {pk: "number"}, { primaryKey: "pk" });

const user = createRelationalObject("user", {
    id: "number",
    username: "string"
})

const product = createRelationalObject("product", {
    id: "number",
    name: "string"
})

const wishlist = createRelationalObject("wishlist", {
    id: "number",
})


user.hasOne(wishlist, "wishlist")
wishlist.hasMany(product, "products")


const store = createStore({
  relationalCreators: [
    user,
    product,
    wishlist
  ],

  // Used to identify an object that is upserted in the store.
  // Optionally, the object can contain a __identify__: "wishlist" field to identify what object it is
  // using the __identify__ will be faster.
  identifier: {
    user: o => "username" in o,
    product: o => "productName" in o,
    wishlist: o => "wishlistName" in o,
  }
});

type From = "user" | "wishlist" | "product"

// Example useage
const query = useQuery<From, User, User>({
  
  // Optionally add a fetch to get data on mount
  fetch: () => GetData.request({user: 10}),

  // Select some data from the store
  select: {
    from: "user",
    where: { id: 10 },
    fields: ["id", "wishlist"],
    join: [{
      on: "wishlist",
      fields: ["id", "products"],
      join: [{ on: "products", fields: "*" }]
    }]
  }
})