import { Change as FirestoreChange } from "firebase-functions/v1";
import { DocumentSnapshot } from "firebase-functions/v1/firestore";
import { FieldValue, GeoPoint, Timestamp } from "firebase-admin/firestore";

export type Change = FirestoreChange<DocumentSnapshot>;

export enum ChangeType {
  CREATE = "CREATE",
  UPDATE = "UPDATE",
  DELETE = "DELETE",
}

export enum State {
  PROCESSING = "PROCESSING",
  COMPLETED = "COMPLETED",
  ERROR = "ERROR",
  BACKFILLED = "BACKFILLED",
}

export interface Status {
  state: State;
  updateTime: Timestamp;
  startTime: Timestamp;
}

type FirestoreFieldPrimitive =
  | string
  | number
  | boolean
  | FieldValue
  | Timestamp
  | GeoPoint
  | undefined // i dont think we can actually try to update with an undefined, we have to use the FieldValue.delete() or something
  | null;

type ValueOrMapOrArray<T> =
  | T
  | { [key: string]: ValueOrMapOrArray<T> | T }
  | Array<ValueOrMapOrArray<T>>;

// TODO missing reference type
export type FirestoreField = ValueOrMapOrArray<FirestoreFieldPrimitive>;