schema {
  query: RootQuery
}

scalar Time
scalar Label

# Information about pagination in a connection.
type PageInfo {
  # When paginating forwards, are there more items?
  hasNextPage: Boolean!

  # When paginating backwards, are there more items?
  hasPreviousPage: Boolean!

  # When paginating backwards, the cursor to continue.
  startCursor: String

  # When paginating forwards, the cursor to continue.
  endCursor: String
}

# Represents an person in a git object.
type Person {
  # The email of the person.
  email: String

  # The name of the person.
  name: String
}


type CommentConnection {
  edges: [CommentEdge]
  nodes: [Comment]
  pageInfo: PageInfo!
  totalCount: Int!
}

type CommentEdge {
  cursor: String!
  node: Comment!
}

interface Commentable {
  # A list of comments associated with the object.
  comments(
    # Returns the elements in the list that come after the specified cursor.
    after: String

    # Returns the elements in the list that come before the specified cursor.
    before: String

    # Returns the first _n_ elements from the list.
    first: Int

    # Returns the last _n_ elements from the list.
    last: Int
  ): CommentConnection!
}

# Represents a comment on a bug.
type Comment implements Authored {
  # The author of this comment.
  author: Person!

  # The message of this comment.
  message: String!
}

enum Status {
  OPEN
  CLOSED
}

# An object that has an author.
interface Authored {
  # The author of this object.
  author: Person!
}

type OperationConnection {
  edges: [OperationEdge]!
  nodes: [OperationUnion]!
  pageInfo: PageInfo!
  totalCount: Int!
}

type OperationEdge {
  cursor: String!
  node: OperationUnion
}

# An operation applied to a bug.
interface Operation {
  # The operations author.
  author: Person!

  # The datetime when this operation was issued.
  date: Time!
}

type CreateOperation implements Operation, Authored {
  author: Person!
  date: Time!

  title: String!
  message: String!
}

type SetTitleOperation implements Operation, Authored {
  author: Person!
  date: Time!

  title: String!
}

type AddCommentOperation implements Operation, Authored {
  author: Person!
  date: Time!

  message: String!
}

type SetStatusOperation implements Operation, Authored {
  author: Person!
  date: Time!

  status: Status!
}

type LabelChangeOperation implements Operation, Authored {
  author: Person!
  date: Time!

  added: [Label]!
  removed: [Label]!
}

union OperationUnion =
    CreateOperation
  | SetTitleOperation
  | AddCommentOperation
  | SetStatusOperation
  | LabelChangeOperation

# The connection type for Label.
type BugConnection {
  # A list of edges.
  edges: [BugEdge]!

  # A list of nodes.
  nodes: [Bug]!

  # Information to aid in pagination.
  pageInfo: PageInfo!

  # Identifies the total count of items in the connection.
  totalCount: Int!
}

# An edge in a connection.
type BugEdge {
  # A cursor for use in pagination.
  cursor: String!

  # The item at the end of the edge.
  node: Bug
}

type Bug implements Authored, Commentable {
  id: String!
  humanId: String!
  title: String!
  status: Status!

  # A list of labels associated with the repository.
  labels: [Label]!

  comments(
    # Returns the elements in the list that come after the specified cursor.
    after: String

    # Returns the elements in the list that come before the specified cursor.
    before: String

    # Returns the first _n_ elements from the list.
    first: Int

    # Returns the last _n_ elements from the list.
    last: Int

    # If provided, searches comments by name and description.
    query: String
  ): CommentConnection!

  operations(
    # Returns the elements in the list that come after the specified cursor.
    after: String

    # Returns the elements in the list that come before the specified cursor.
    before: String

    # Returns the first _n_ elements from the list.
    first: Int

    # Returns the last _n_ elements from the list.
    last: Int

    # If provided, searches operations by name and description.
    query: String
  ): OperationConnection!
}

type RootQuery {
  allBugs(
    # Returns the elements in the list that come after the specified cursor.
    after: String

    # Returns the elements in the list that come before the specified cursor.
    before: String

    # Returns the first _n_ elements from the list.
    first: Int

    # Returns the last _n_ elements from the list.
    last: Int

    # If provided, searches labels by name and description.
    query: String
  ): BugConnection!
  bug(id: String!): Bug
}