extend schema
  @link(url: "https://specs.apollo.dev/federation/v2.3", import: ["@key", "@tag", "@shareable"])
  @link(url: "https://specs.graphql-hive.com/hive/v1.0", import: ["@meta"])
  @meta(name: "owner", content: "users-team")
  @meta(name: "contact", content: "#users-channel")

directive @tag(name: String!) repeatable on FIELD_DEFINITION | OBJECT

directive @meta(
  name: String!
  content: String!
) repeatable on SCHEMA | OBJECT | INTERFACE | FIELD_DEFINITION

"""
## User Account

Represents a **registered user** in the system. User data is subject to *strict privacy controls*.

### Key Features
- Unique identification via `id` and `username`
- Personal information (tagged as PII)
- Account creation tracking

> **Important**: Email and name fields contain Personally Identifiable Information (PII) and must be handled according to data privacy regulations.

**Authentication**: Users authenticate via email or username
**Federation**: Extended by other subgraphs for additional user data
"""
type User
  @key(fields: "id")
  @key(fields: "email")
  @meta(name: "domain", content: "users")
  @meta(name: "priority", content: "tier1") {
  """
  Unique identifier for the user
  """
  id: ID!
  """
  User's email address (tagged as PII for data privacy compliance)
  """
  email: String! @tag(name: "pii") @meta(name: "sensitivity", content: "pii")
  """
  User's full name
  """
  name: String @meta(name: "sensitivity", content: "pii")
  """
  User's display alias or username
  """
  alias: String
  """
  Total number of products created by this user
  """
  totalProductsCreated: Int @shareable
  """
  Timestamp when the user account was created
  """
  createdAt: DateTime
}

"""
ISO-8601 formatted date and time string
"""
scalar DateTime

"""
Input for creating a new user account
"""
input CreateUserInput {
  """
  User's email address (required)
  """
  email: String!
  """
  User's full name (required)
  """
  name: String!
  """
  Optional display alias or username
  """
  alias: String
}

"""
Input for updating an existing user account
"""
input UpdateUserInput {
  """
  Updated full name
  """
  name: String
  """
  Updated display alias or username
  """
  alias: String
}

extend type Query {
  me: User
  user(id: ID!): User
  users: [User]
}

extend type Mutation {
  createUser(input: CreateUserInput!): User!
  updateUser(id: ID!, input: UpdateUserInput!): User
}