"""
Product catalog of the ORD playground shop.
`Product.id` is the join key used by the Orders OData service (`OrderItems.ProductID`).
"""
type Query {
  "List products, optionally filtered."
  products(categoryId: ID, supplierId: ID, maxPrice: Float, search: String): [Product!]!
  "Get a single product by its ID (e.g. P001)."
  product(id: ID!): Product
  "Batch lookup, handy to resolve the product IDs of order items."
  productsByIds(ids: [ID!]!): [Product!]!
  categories: [Category!]!
  suppliers: [Supplier!]!
}

type Mutation {
  "Adjust the stock level of a product (in memory only)."
  adjustStock(productId: ID!, delta: Int!): Product!
}

type Product {
  id: ID!
  sku: String!
  name: String!
  description: String
  price: Float!
  currency: String!
  stock: Int!
  tags: [String!]!
  category: Category!
  supplier: Supplier!
}

type Category {
  id: ID!
  name: String!
  products: [Product!]!
}

type Supplier {
  id: ID!
  name: String!
  country: String!
  products: [Product!]!
}