import Constants from 'expo-constants';

/**
 * The types of update-related events.
 */
export enum UpdateEventType {
  /**
   * A new update has finished downloading to local storage. If you would like to start using this
   * update at any point before the user closes and restarts the app on their own, you can call
   * [`Updates.reloadAsync()`](#reloadasync) to launch this new update.
   */
  UPDATE_AVAILABLE = 'updateAvailable',
  /**
   * No updates are available, and the most up-to-date update is already running.
   */
  NO_UPDATE_AVAILABLE = 'noUpdateAvailable',
  /**
   * An error occurred trying to fetch the latest update.
   */
  ERROR = 'error',
}

// @docsMissing
// TODO(eric): move source of truth for manifest type to this module
/**
 * @hidden
 */
export type ClassicManifest = typeof Constants.manifest;

// @docsMissing
/**
 * @hidden
 */
export type Manifest = ClassicManifest | typeof Constants.manifest2;
// modern manifest type is intentionally not exported, since the plan is to call it just "Manifest"
// in the future

type UpdateCheckResultRollBackToEmbedded = {
  /**
   * Whether an update is available. This property is false for a roll back update.
   */
  isAvailable: false;
  /**
   * The manifest of the update when available.
   */
  manifest: undefined;
  /**
   * Whether a roll back to embedded update is available.
   */
  isRollBackToEmbedded: true;
};

/**
 * The successful result of checking for a new update.
 */
export type UpdateCheckResultSuccess = {
  /**
   * Whether an update is available. This property is false for a roll back update.
   */
  isAvailable: true;
  /**
   * The manifest of the update when available.
   */
  manifest: Manifest;
  /**
   * Whether a roll back to embedded update is available.
   */
  isRollBackToEmbedded: false;
};

/**
 * The failed result of checking for a new update.
 */
export type UpdateCheckResultFailure = {
  /**
   * Whether an update is available. This property is false for a roll back update.
   */
  isAvailable: false;
  /**
   * The manifest of the update when available.
   */
  manifest: undefined;
  /**
   * Whether a roll back to embedded update is available.
   */
  isRollBackToEmbedded: false;
};

/**
 * The result of checking for a new update.
 */
export type UpdateCheckResult =
  | UpdateCheckResultRollBackToEmbedded
  | UpdateCheckResultSuccess
  | UpdateCheckResultFailure;

/**
 * The successful result of fetching a new update.
 */
export type UpdateFetchResultSuccess = {
  /**
   * Whether the fetched update is new (that is, a different version than what's currently running).
   * False when roll back to embedded is true.
   */
  isNew: true;
  /**
   * The manifest of the fetched update.
   */
  manifest: Manifest;
  /**
   * Whether the fetched update is a roll back to the embedded update.
   */
  isRollBackToEmbedded: false;
};

/**
 * The failed result of fetching a new update.
 */
export type UpdateFetchResultFailure = {
  /**
   * Whether the fetched update is new (that is, a different version than what's currently running).
   * False when roll back to embedded is true.
   */
  isNew: false;
  /**
   * The manifest of the fetched update.
   */
  manifest: undefined;
  /**
   * Whether the fetched update is a roll back to the embedded update.
   */
  isRollBackToEmbedded: false;
};

/**
 * The roll back to embedded result of fetching a new update.
 */
type UpdateFetchResultRollBackToEmbedded = {
  /**
   * Whether the fetched update is new (that is, a different version than what's currently running).
   * False when roll back to embedded is true.
   */
  isNew: false;
  /**
   * The manifest of the fetched update.
   */
  manifest: undefined;
  /**
   * Whether the fetched update is a roll back to the embedded update.
   */
  isRollBackToEmbedded: true;
};

/**
 * The result of fetching a new update.
 */
export type UpdateFetchResult =
  | UpdateFetchResultSuccess
  | UpdateFetchResultFailure
  | UpdateFetchResultRollBackToEmbedded;

/**
 * An object that is passed into each event listener when an auto-update check occurs.
 */
export type UpdateEvent = {
  /**
   * Type of the event.
   */
  type: UpdateEventType;
  /**
   * If `type` is `Updates.UpdateEventType.UPDATE_AVAILABLE`, the manifest of the newly downloaded
   * update, and `undefined` otherwise.
   */
  manifest?: Manifest;
  /**
   * If `type` is `Updates.UpdateEventType.ERROR`, the error message, and `undefined` otherwise.
   */
  message?: string;
};

/**
 * An object representing a single log entry from expo-updates logging on the client.
 */
export type UpdatesLogEntry = {
  /**
   * The time the log was written, in milliseconds since Jan 1 1970 UTC.
   */
  timestamp: number;
  /**
   * The log entry message.
   */
  message: string;
  /**
   * One of the defined code values for expo-updates log entries.
   */
  code: UpdatesLogEntryCode;
  /**
   * One of the defined log level or severity values.
   */
  level: UpdatesLogEntryLevel;
  /**
   * If present, the unique ID of an update associated with this log entry.
   */
  updateId?: string;
  /**
   * If present, the unique ID or hash of an asset associated with this log entry.
   */
  assetId?: string;
  /**
   * If present, an iOS or Android native stack trace associated with this log entry.
   */
  stacktrace?: string[];
};

/**
 * The possible code values for expo-updates log entries
 */
export enum UpdatesLogEntryCode {
  NONE = 'None',
  NO_UPDATES_AVAILABLE = 'NoUpdatesAvailable',
  UPDATE_ASSETS_NOT_AVAILABLE = 'UpdateAssetsNotAvailable',
  UPDATE_SERVER_UNREACHABLE = 'UpdateServerUnreachable',
  UPDATE_HAS_INVALID_SIGNATURE = 'UpdateHasInvalidSignature',
  UPDATE_CODE_SIGNING_ERROR = 'UpdateCodeSigningError',
  UPDATE_FAILED_TO_LOAD = 'UpdateFailedToLoad',
  ASSETS_FAILED_TO_LOAD = 'AssetsFailedToLoad',
  JS_RUNTIME_ERROR = 'JSRuntimeError',
  UNKNOWN = 'Unknown',
}

/**
 * The possible log levels for expo-updates log entries
 */
export enum UpdatesLogEntryLevel {
  TRACE = 'trace',
  DEBUG = 'debug',
  INFO = 'info',
  WARN = 'warn',
  ERROR = 'error',
  FATAL = 'fatal',
}

/**
 * The possible settings that determine if expo-updates will check for updates on app startup.
 * By default, Expo will check for updates every time the app is loaded. Set this to `ON_ERROR_RECOVERY` to disable automatic checking unless recovering from an error. Set this to `NEVER` to completely disable automatic checking. Must be one of `ON_LOAD` (default value), `ON_ERROR_RECOVERY`, `WIFI_ONLY`, or `NEVER`
 */
export enum UpdatesCheckAutomaticallyValue {
  /**
   * Checks for updates whenever the app is loaded. This is the default setting.
   */
  ON_LOAD = 'ON_LOAD',
  /**
   * Only checks for updates when the app starts up after an error recovery.
   */
  ON_ERROR_RECOVERY = 'ON_ERROR_RECOVERY',
  /**
   * Only checks for updates when the app starts and has a WiFi connection.
   */
  WIFI_ONLY = 'WIFI_ONLY',
  /**
   * Automatic update checks are off, and update checks must be done through the JS API.
   */
  NEVER = 'NEVER',
}

// @docsMissing
/**
 * @hidden
 */
export type LocalAssets = Record<string, string>;