schema
  @link(url: "https://specs.apollo.dev/link/v1.0")
  @link(url: "https://specs.apollo.dev/join/v0.3", for: EXECUTION) {
  query: Query
  mutation: Mutation
  subscription: Subscription
}

directive @join__enumValue(graph: join__Graph!) repeatable on ENUM_VALUE

directive @join__field(
  graph: join__Graph
  requires: join__FieldSet
  provides: join__FieldSet
  type: String
  external: Boolean
  override: String
  usedOverridden: Boolean
) repeatable on FIELD_DEFINITION | INPUT_FIELD_DEFINITION

directive @join__graph(name: String!, url: String!) on ENUM_VALUE

directive @join__implements(
  graph: join__Graph!
  interface: String!
) repeatable on OBJECT | INTERFACE

directive @join__type(
  graph: join__Graph!
  key: join__FieldSet
  extension: Boolean! = false
  resolvable: Boolean! = true
  isInterfaceObject: Boolean! = false
) repeatable on OBJECT | INTERFACE | UNION | ENUM | INPUT_OBJECT | SCALAR

directive @join__unionMember(
  graph: join__Graph!
  member: String!
) repeatable on UNION

directive @link(
  url: String
  as: String
  for: link__Purpose
  import: [link__Import]
) repeatable on SCHEMA

scalar join__FieldSet
scalar link__Import

enum join__Graph {
  ACCOUNTS @join__graph(name: "accounts", url: "http://localhost:4001")
  INVENTORY @join__graph(name: "inventory", url: "http://localhost:4004")
  PRODUCTS @join__graph(name: "products", url: "http://localhost:4003")
  REVIEWS @join__graph(name: "reviews", url: "http://localhost:4002")
}

enum link__Purpose {
  SECURITY
  EXECUTION
}

type Mutation @join__type(graph: PRODUCTS) @join__type(graph: REVIEWS) {
  createProduct(name: String, upc: ID!): Product @join__field(graph: PRODUCTS)
  createReview(body: String, id: ID!, upc: ID!): Review
    @join__field(graph: REVIEWS)
}

type Subscription @join__type(graph: ACCOUNTS) @join__type(graph: REVIEWS) {
  userWasCreated: User @join__field(graph: ACCOUNTS)
  reviewAdded: Review @join__field(graph: REVIEWS)
}

type Product
  @join__type(graph: ACCOUNTS, key: "upc", extension: true)
  @join__type(graph: INVENTORY, key: "upc")
  @join__type(graph: PRODUCTS, key: "upc")
  @join__type(graph: REVIEWS, key: "upc") {
  upc: String!
  weight: Int
    @join__field(graph: INVENTORY, external: true)
    @join__field(graph: PRODUCTS)
  price: Int
    @join__field(graph: INVENTORY, external: true)
    @join__field(graph: PRODUCTS)
  inStock: Boolean @join__field(graph: INVENTORY)
  shippingEstimate: Int @join__field(graph: INVENTORY, requires: "price weight")
  name: String @join__field(graph: PRODUCTS)
  reviews: [Review] @join__field(graph: REVIEWS)
  reviewsForAuthor(authorID: ID!): [Review] @join__field(graph: REVIEWS)
}

type Query
  @join__type(graph: ACCOUNTS)
  @join__type(graph: INVENTORY)
  @join__type(graph: PRODUCTS)
  @join__type(graph: REVIEWS) {
  me: User @join__field(graph: ACCOUNTS)
  topProducts(first: Int = 5): [Product] @join__field(graph: PRODUCTS)
}

type Review @join__type(graph: REVIEWS, key: "id") {
  id: ID!
  body: String @join__field(graph: REVIEWS)
  product: Product @join__field(graph: REVIEWS)
  author: User @join__field(graph: REVIEWS, provides: "username")
}

type User
  @join__type(graph: ACCOUNTS, key: "id")
  @join__type(graph: REVIEWS, key: "id") {
  id: ID!
  name: String @join__field(graph: ACCOUNTS)
  username: String
    @join__field(graph: ACCOUNTS)
    @join__field(graph: REVIEWS, external: true)
  reviews: [Review] @join__field(graph: REVIEWS)
}