import 'dart:ffi';
import 'dart:io';

import 'package:ffi/ffi.dart';

class CallbackResult {
  late int callerRet;
  late String msg;
}

/// Callback typedef
typedef WakuCallBackC = Void Function(
    Int32 callerRet, Pointer<Utf8> msg, IntPtr len, Pointer<Void> userData);
typedef WakuCallBackDart = void Function(
    int callerRet, Pointer<Utf8> msg, int len, Pointer<Void> userData);

/// waku_new typedefs
typedef WakuNewC = Pointer<Void> Function(Pointer<Utf8> configJson,
    Pointer<NativeFunction<WakuCallBackC>> callback, Pointer<Void> userData);

typedef WakuNewDart = Pointer<Void> Function(Pointer<Utf8> configJson,
    Pointer<NativeFunction<WakuCallBackC>> callback, Pointer<Void> userData);

/// no params functions typedefs
typedef WakuNoParamsC = Pointer<Void> Function(Pointer<Void> ctx,
    Pointer<NativeFunction<WakuCallBackC>> callback, Pointer<Void> userData);

typedef WakuNoParamsDart = Pointer<Void> Function(Pointer<Void> ctx,
    Pointer<NativeFunction<WakuCallBackC>> callback, Pointer<Void> userData);

/// Load the shared library
final DynamicLibrary wakuLib = DynamicLibrary.open(
  Platform.isMacOS
      ? 'libwaku.dylib'
      : Platform.isLinux
          ? 'libwaku.so'
          : 'waku.dll',
);

/// Lookup functions
final WakuNewDart waku_new =
    wakuLib.lookupFunction<WakuNewC, WakuNewDart>('waku_new');

final WakuNoParamsDart waku_destroy =
    wakuLib.lookupFunction<WakuNoParamsC, WakuNoParamsDart>('waku_destroy');

final WakuNoParamsDart waku_start =
    wakuLib.lookupFunction<WakuNoParamsC, WakuNoParamsDart>('waku_start');

final WakuNoParamsDart waku_stop =
    wakuLib.lookupFunction<WakuNoParamsC, WakuNoParamsDart>('waku_stop');