// Types aligned with the original @react-native-async-storage/async-storage

export type Callback = (error?: Error | null) => void;

export type CallbackWithResult<T> = (
  error?: Error | null,
  result?: T | null
) => void;

export type KeyValuePair = [string, string | null];

export type MultiCallback = (
  errors?: readonly (Error | null)[] | null
) => void;

export type MultiGetCallback = (
  errors?: readonly (Error | null)[] | null,
  result?: readonly KeyValuePair[]
) => void;

export type AsyncStorageStatic = {
  getItem: (
    key: string,
    callback?: CallbackWithResult<string>
  ) => Promise<string | null>;
  setItem: (
    key: string,
    value: string,
    callback?: Callback
  ) => Promise<void>;
  removeItem: (key: string, callback?: Callback) => Promise<void>;
  mergeItem: (key: string, value: string, callback?: Callback) => Promise<void>;
  clear: (callback?: Callback) => Promise<void>;
  getAllKeys: (
    callback?: CallbackWithResult<readonly string[]>
  ) => Promise<readonly string[]>;
  flushGetRequests: () => void;
  multiGet: (
    keys: readonly string[],
    callback?: MultiGetCallback
  ) => Promise<readonly KeyValuePair[]>;
  multiSet: (
    keyValuePairs: ReadonlyArray<readonly [string, string]>,
    callback?: MultiCallback
  ) => Promise<void>;
  multiRemove: (
    keys: readonly string[],
    callback?: MultiCallback
  ) => Promise<void>;
  multiMerge: (
    keyValuePairs: [string, string][],
    callback?: MultiCallback
  ) => Promise<void>;
};