export class User extends Doc {
	@Field name?: string
	@Field thumbnailImage?: File
	@SubCollection items: Collection<Item> = new Collection()
}

import React from 'react';
import { StyleSheet, Text, View } from 'react-native';
import * as firebase from 'firebase'
import '@firebase/firestore'
import * as Ballcap from '@1amageek/ballcap'

const config = { ... }  // apiKey, authDomain, etc. (see above)
const app = firebase.initializeApp(config)
Ballcap.initialize(app)

Ballcap.initialize(app.firestore())

Ballcap.initialize(app.firestore(), app.firestore().collection("version").doc("1"))

// autoID
const user: User = new User()

// with ID
const user: User = new User("ID")

// with DocumentReference
const user: User = new User(firestore.doc("a/a"))

// save
await user.save()

// update
await user.upate()

// delete
await user.delete()

const data = user.data()

const user: User = new User()
const batch: Batch = new Batch()

batch.save(user)
await batch.commit()

// with id
const user?: User = await User.get("id")

// with DocumentReference
const user?: User = await User.get(firestore.doc("a/a"))

const user: User = User.fromSnapshot(documentSnapshot)

export class Address extends Model {
  @Field postCode?: string
  @Field country?: string
}

export class Shipping extends Doc {
  @Codable(Address)
  @Field address?: Address
  @Field phone?: string
}

export class User extends Doc {
  @Field name?: string
  @Field thumbnailImage?: File
  @Codable(Address)
  @Field address: Address[] = []
  @Codable(Shipping, true)
  @Field shipping?: Shipping
}

@Codable(Address)
@Field address: Address[] = []

{
  id: "shipping id",
  path: "shipping path",
  data: {
    // shipping data
  }
}

@Codable(Shipping, true)
@Field shipping?: Shipping

class Charge extends Doc {
  @Field amount: number = 0
  @Field userID!: string
}
class User extends Doc {
  @SubCollection charges: Collection<Charge> = new Collection()
}