import 'dart:ffi' as ffi;
import 'package:ffi/ffi.dart';

typedef ShellExecuteC = ffi.Int32 Function(
  ffi.Pointer hwnd,
  ffi.Pointer lpOperation,
  ffi.Pointer lpFile,
  ffi.Pointer lpParameters,
  ffi.Pointer lpDirectory,
  ffi.Uint32 nShowCmd,
);
typedef ShellExecuteDart = int Function(
  ffi.Pointer parentWindow,
  ffi.Pointer operation,
  ffi.Pointer file,
  ffi.Pointer parameters,
  ffi.Pointer directory,
  int showCmd,
);

/// run the [operation]s on shell
int shellExecute(String operation, String file) {
  // Load shell32.
  final dylib = ffi.DynamicLibrary.open('shell32.dll');

  // Look up the `ShellExecuteW` function.
  final shellExecuteP =
      dylib.lookupFunction<ShellExecuteC, ShellExecuteDart>('ShellExecuteW');

  // Allocate pointers to Utf8 arrays containing the command arguments.
  final operationP = operation.toNativeUtf16();
  final fileP = file.toNativeUtf16();
  const int swShowNormal = 1;

  // Invoke the command, and free the pointers.
  final result = shellExecuteP(
      ffi.nullptr, operationP, fileP, ffi.nullptr, ffi.nullptr, swShowNormal);
  calloc.free(operationP);
  calloc.free(fileP);

  return result;
}