export interface FileSystemEntry {
  name: string,
  isDirectory: boolean
  isFile: boolean
}

export interface FileSystemEntryMetadata {
  modificationTime?: Date,
  size?: number
}

export interface FileSystemDirectoryReader {
  readEntries(
    successCallback: (result: FileSystemEntry[]) => void,
    errorCallback?: (error: DOMError) => void,
  ): void
}

export interface FileSystemFlags {
  create?: boolean
  exclusive?: boolean
}

export interface FileSystemDirectoryEntry extends FileSystemEntry {
  isDirectory: true
  isFile: false
  createReader(): FileSystemDirectoryReader
  getFile(
    path?: string,
    options?: FileSystemFlags,
    successCallback?: (result: FileSystemFileEntry) => void,
    errorCallback?: (error: DOMError) => void,
  ): void
  getDirectory(
    path?: string,
    options?: FileSystemFlags,
    successCallback?: (result: FileSystemDirectoryEntry) => void,
    errorCallback?: (error: DOMError) => void,
  ): void
}

export interface FileSystemFileEntry extends FileSystemEntry {
  isDirectory: false
  isFile: true
  file(callback: (file: File) => void): void
}