export enum Command {
  Open = "open",
  TabOpen = "tabopen",
  WindowOpen = "winopen",
  Buffer = "buffer",
  BufferDelete = "bdelete",
  BufferDeleteForce = "bdelete!",
  BuffersDelete = "bdeletes",
  BuffersDeleteForce = "bdeletes!",
  AddBookmark = "addbookmark",
  Quit = "quit",
  QuitAll = "quitall",
  Set = "set",
  Help = "help",
}

export namespace Command {
  export function members(): Command[] {
    return [
      Command.Open,
      Command.TabOpen,
      Command.WindowOpen,
      Command.Buffer,
      Command.BufferDelete,
      Command.BufferDeleteForce,
      Command.BuffersDelete,
      Command.BuffersDeleteForce,
      Command.AddBookmark,
      Command.Quit,
      Command.QuitAll,
      Command.Set,
      Command.Help,
    ];
  }

  export function valueOf(value: string): Command {
    const map = new Map(members().map((cmd) => [cmd.toString(), cmd]));
    const cmd = map.get(value);
    if (!cmd) {
      throw new Error(`unknown command '${value}`);
    }
    return cmd;
  }
}