import 'dart:ffi';
import 'dart:convert';

import 'package:cw_zano/api/convert_utf8_to_string.dart';
import 'package:cw_zano/api/model/get_recent_txs_and_info_params.dart';
import 'package:cw_zano/api/model/transfer_params.dart';
import 'package:cw_zano/api/structs/utf8_box.dart';
import 'package:cw_zano/api/zano_api.dart';
import 'package:ffi/ffi.dart';
import 'package:flutter/foundation.dart';

// bool setup_node(char *address, char *login, char *password, bool use_ssl, bool is_light_wallet, char *error)
final _setupNodeNative =
    zanoApi.lookup<NativeFunction<_setup_node>>('setup_node').asFunction<_SetupNode>();
typedef _setup_node = Int8 Function(
    Pointer<Utf8>, Pointer<Utf8>?, Pointer<Utf8>?, Int8, Int8, Pointer<Utf8>);
typedef _SetupNode = int Function(
    Pointer<Utf8>, Pointer<Utf8>?, Pointer<Utf8>?, int, int, Pointer<Utf8>);

// char * create_wallet(char *path, char *password, char *language, int32_t networkType, char *error)
final _createWalletNative =
    zanoApi.lookup<NativeFunction<_create_wallet>>('create_wallet').asFunction<_CreateWallet>();
typedef _create_wallet = Pointer<Utf8> Function(
    Pointer<Utf8>, Pointer<Utf8>, Pointer<Utf8>, Int32, Pointer<Utf8>);
typedef _CreateWallet = Pointer<Utf8> Function(
    Pointer<Utf8>, Pointer<Utf8>, Pointer<Utf8>, int, Pointer<Utf8>);

// char* async_call(char* method_name, uint64_t instance_id, char* params)
final _asyncCallNative =
    zanoApi.lookup<NativeFunction<_async_call>>('async_call').asFunction<_AsyncCall>();
typedef _async_call = Pointer<Utf8> Function(Pointer<Utf8>, Int64, Pointer<Utf8>);
typedef _AsyncCall = Pointer<Utf8> Function(
    Pointer<Utf8> methodName, int hWallet, Pointer<Utf8> params);

// char* get_wallet_status(uint64_t hwallet)
final _getWalletStatusNative = zanoApi
    .lookup<NativeFunction<_get_wallet_status>>('get_wallet_status')
    .asFunction<_GetWalletStatus>();
typedef _get_wallet_status = Pointer<Utf8> Function(Int64);
typedef _GetWalletStatus = Pointer<Utf8> Function(int hWallet);

// char *get_wallet_info(uint64_t hwallet)
final _getWalletInfoNative = zanoApi
    .lookup<NativeFunction<_get_wallet_info>>('get_wallet_info')
    .asFunction<_GetWalletInfo>();
typedef _get_wallet_info = Pointer<Utf8> Function(Int64);
typedef _GetWalletInfo = Pointer<Utf8> Function(int hWallet);

// char*  get_connectivity_status()
final _getConnectivityStatusNative = zanoApi
    .lookup<NativeFunction<_get_connectivity_status>>('get_connectivity_status')
    .asFunction<_GetConnectivityStatus>();
typedef _get_connectivity_status = Pointer<Utf8> Function();
typedef _GetConnectivityStatus = Pointer<Utf8> Function();

// char* get_version()
final _getVersionNative =
    zanoApi.lookup<NativeFunction<_get_version>>('get_version').asFunction<_GetVersion>();
typedef _get_version = Pointer<Utf8> Function();
typedef _GetVersion = Pointer<Utf8> Function();

// char * load_wallet(char *path, char *password, int32_t nettype)
final _loadWalletNative =
    zanoApi.lookup<NativeFunction<_load_wallet>>('load_wallet').asFunction<_LoadWallet>();
typedef _load_wallet = Pointer<Utf8> Function(Pointer<Utf8>, Pointer<Utf8>, Int8);
typedef _LoadWallet = Pointer<Utf8> Function(Pointer<Utf8>, Pointer<Utf8>, int);

// char* try_pull_result(uint64_t job_id)
final _tryPullResultNative = zanoApi
    .lookup<NativeFunction<_try_pull_result>>('try_pull_result')
    .asFunction<_TryPullResult>();
typedef _try_pull_result = Pointer<Utf8> Function(Int64);
typedef _TryPullResult = Pointer<Utf8> Function(int hWallet);

// void close_wallet(uint64_t hwallet)
final _closeWalletNative =
    zanoApi.lookup<NativeFunction<_close_wallet>>('close_wallet').asFunction<_closeWalletStatus>();
typedef _close_wallet = Void Function(Int64);
typedef _closeWalletStatus = void Function(int hWallet);

// uint64_t get_current_tx_fee(uint64_t priority)
final _getCurrentTxFeeNative = zanoApi
    .lookup<NativeFunction<_get_current_tx_fee>>('get_current_tx_fee')
    .asFunction<_getCurrentTxFee>();
typedef _get_current_tx_fee = Int64 Function(Int64);
typedef _getCurrentTxFee = int Function(int priority);

// char * restore_wallet_from_seed(char *path, char *password, char *seed, int32_t networkType, uint64_t restoreHeight, char *error)
final _restoreWalletFromSeedNative = zanoApi
    .lookup<NativeFunction<_restore_wallet_from_seed>>('restore_wallet_from_seed')
    .asFunction<_RestoreWalletFromSeed>();
typedef _restore_wallet_from_seed = Pointer<Utf8> Function(
    Pointer<Utf8>, Pointer<Utf8>, Pointer<Utf8>, Int32, Int64, Pointer<Utf8>);
typedef _RestoreWalletFromSeed = Pointer<Utf8> Function(
    Pointer<Utf8>, Pointer<Utf8>, Pointer<Utf8>, int, int, Pointer<Utf8>);

// char* set_password(uint64_t hwallet, char *password, Utf8Box &error)
final _setPasswordNative =
    zanoApi.lookup<NativeFunction<_set_password>>('set_password').asFunction<_SetPassword>();
typedef _set_password = Pointer<Utf8> Function(Int64 hWallet, Pointer<Utf8> password, Pointer<Utf8Box> error);
typedef _SetPassword = Pointer<Utf8> Function(int hWallet, Pointer<Utf8> password, Pointer<Utf8Box> error);

String setPassword({required int hWallet, required String password}) {
  final passwordPointer = password.toNativeUtf8();
  final errorMessagePointer = calloc<Utf8Box>();
  final result =
      convertUTF8ToString(pointer: _setPasswordNative(hWallet, passwordPointer, errorMessagePointer));
  calloc.free(passwordPointer);

  /*if (!changed) {
    final message = errorMessagePointer.ref.getValue();
    calloc.free(errorMessagePointer);
    throw Exception(message);
  }*/

  calloc.free(errorMessagePointer);
  return result;
}

// is_wallet_exist(char *path)
final _isWalletExistNative = zanoApi
    .lookup<NativeFunction<_is_wallet_exist>>('is_wallet_exist')
    .asFunction<_IsWalletExist>();
typedef _is_wallet_exist = Int8 Function(Pointer<Utf8>);
typedef _IsWalletExist = int Function(Pointer<Utf8>);

bool isWalletExist({required String path}) {
  final pathPointer = path.toNativeUtf8();
  final isExist = _isWalletExistNative(pathPointer) != 0;
  calloc.free(pathPointer);
  return isExist;
}

bool setupNode({
  required String address,
  String? login,
  String? password,
  bool useSSL = false,
  bool isLightWallet = false,
  /*String? socksProxyAddress*/
}) {
  final addressPointer = address.toNativeUtf8();
  Pointer<Utf8>? loginPointer;
  Pointer<Utf8>? socksProxyAddressPointer;
  Pointer<Utf8>? passwordPointer;

  if (login != null) {
    loginPointer = login.toNativeUtf8();
  }

  if (password != null) {
    passwordPointer = password.toNativeUtf8();
  }

  final errorMessagePointer = ''.toNativeUtf8();
  debugPrint(
      "setup_node address $address login $login password $password useSSL $useSSL isLightWallet $isLightWallet");
  final isSetupNode = _setupNodeNative(addressPointer, loginPointer, passwordPointer,
          _boolToInt(useSSL), _boolToInt(isLightWallet), errorMessagePointer) !=
      0;
  debugPrint("setup_node result $isSetupNode");

  calloc.free(addressPointer);

  if (loginPointer != null) {
    calloc.free(loginPointer);
  }

  if (passwordPointer != null) {
    calloc.free(passwordPointer);
  }

  return isSetupNode;
}

String asyncCall({required String methodName, required int hWallet, required String params}) {
  final methodNamePointer = methodName.toNativeUtf8();
  final paramsPointer = params.toNativeUtf8();

  debugPrint('async_call method_name $methodName hWallet $hWallet params $params');
  final result =
      convertUTF8ToString(pointer: _asyncCallNative(methodNamePointer, hWallet, paramsPointer));

  calloc.free(methodNamePointer);
  calloc.free(paramsPointer);

  return result;
}

String createWallet(
    {required String path, required String password, required String language, int nettype = 0}) {
  final pathPointer = path.toNativeUtf8();
  final passwordPointer = password.toNativeUtf8();
  final languagePointer = language.toNativeUtf8();
  final errorMessagePointer = ''.toNativeUtf8();
  debugPrint('create_wallet path $path password $password language $language');
  final result = convertUTF8ToString(
      pointer: _createWalletNative(
          pathPointer, passwordPointer, languagePointer, nettype, errorMessagePointer));
  debugPrint('create_wallet result $result');
  calloc.free(pathPointer);
  calloc.free(passwordPointer);
  calloc.free(languagePointer);

  return result;
}

Future<String> invokeMethod(int hWallet, String methodName, String params) async {
  debugPrint('invoke method $methodName params $params');
  final invokeResult = asyncCall(
      methodName: 'invoke',
      hWallet: hWallet,
      params: json.encode({
        'method': methodName,
        'params': params,
      }));
  debugPrint('invoke result $invokeResult');
  final map = json.decode(invokeResult);
  if (map['job_id'] != null) {
    await Future.delayed(Duration(seconds: 3));
    final result = tryPullResult(map['job_id'] as int);
    return result;
  }
  return invokeResult;
}

Future<String> store(int hWallet) async {
  return await invokeMethod(hWallet, 'store', '{}');
}

Future<String> transfer(int hWallet, TransferParams params) async {
  final invokeResult = await asyncCall(
    methodName: 'invoke',
    hWallet: hWallet,
    params: '{"method": "transfer","params": ${jsonEncode(params)}}',
  );
  debugPrint('invoke result $invokeResult');
  var map = json.decode(invokeResult);
  if (map['job_id'] != null) {
    // TODO: fixit
    await Future.delayed(Duration(seconds: 3));
    final result = tryPullResult(map['job_id'] as int);
    return result;
  }
  return invokeResult;
}

Future<String> getRecentTxsAndInfo(
    {required int hWallet,
    required int offset,
    required int count,
    bool updateProvisionInfo = true}) async {
  return await invokeMethod(
    hWallet,
    'get_recent_txs_and_info',
    json.encode(
      GetRecentTxsAndInfoParams(
        offset: offset,
        count: count,
        updateProvisionInfo: updateProvisionInfo,
      ),
    ),
  );
}

String getWalletStatus(int hWallet) {
  debugPrint('get_wallet_status hWallet $hWallet');
  final result = convertUTF8ToString(pointer: _getWalletStatusNative(hWallet));
  debugPrint('get_wallet_status result $result');
  return result;
}

void closeWallet(int hWallet) {
  debugPrint('close_wallet hWallet $hWallet');
  _closeWalletNative(hWallet);
}

int getCurrentTxFee(int priority) {
  debugPrint('get_current_tx_fee priority $priority');
  final result = _getCurrentTxFeeNative(priority);
  debugPrint('get_current_tx_fee result $result');
  return result;
}

String getWalletInfo(int hWallet) {
  debugPrint('get_wallet_info hWallet $hWallet');
  final result = convertUTF8ToString(pointer: _getWalletInfoNative(hWallet));
  debugPrint('get_wallet_info result $result');
  return result;
}

String getConnectivityStatus() {
  final result = convertUTF8ToString(pointer: _getConnectivityStatusNative());
  debugPrint('get_connectivity_status result $result');
  return result;
}

String getVersion() {
  final result = convertUTF8ToString(pointer: _getVersionNative());
  debugPrint('get_version result $result');
  return result;
}

String restoreWalletFromSeed(String path, String password, String seed) {
  debugPrint('restore_wallet_from_seed path $path password $password seed $seed');
  final pathPointer = path.toNativeUtf8();
  final passwordPointer = password.toNativeUtf8();
  final seedPointer = seed.toNativeUtf8();
  final errorMessagePointer = ''.toNativeUtf8();
  final result = convertUTF8ToString(
      pointer: _restoreWalletFromSeedNative(
          pathPointer, passwordPointer, seedPointer, 0, 0, errorMessagePointer));
  debugPrint('restore wallet from seed result $result');
  return result;
}

String loadWallet(String path, String password, int nettype) {
  debugPrint('load_wallet path $path password $password nettype $nettype');
  final pathPointer = path.toNativeUtf8();
  final passwordPointer = password.toNativeUtf8();
  final result = convertUTF8ToString(
    pointer: _loadWalletNative(pathPointer, passwordPointer, nettype),
  );
  debugPrint('load_wallet result $result');
  return result;
}

String tryPullResult(int jobId) {
  debugPrint('try_pull_result jobId $jobId');
  final result = convertUTF8ToString(pointer: _tryPullResultNative(jobId));
  debugPrint('try_pull_result result $result');
  return result;
}

int _boolToInt(bool value) => value ? 1 : 0;