/* 
 * This file is part of Stack Wallet.
 * 
 * Copyright (c) 2023 Cypher Stack
 * All Rights Reserved.
 * The code is distributed under GPLv3 license, see LICENSE file for details.
 * Generated by Cypher Stack on 2023-05-26
 *
 */

import 'dart:io';

import 'package:local_auth/local_auth.dart';
import 'package:local_auth_android/local_auth_android.dart';

import 'logger.dart';

class Biometrics {
  static const integrationTestFlag =
      bool.fromEnvironment("IS_INTEGRATION_TEST");

  const Biometrics();

  Future<bool> authenticate({
    required String cancelButtonText,
    required String localizedReason,
    required String title,
  }) async {
    if (!(Platform.isIOS || Platform.isAndroid)) {
      Logging.instance.log(
        "Tried to use Biometrics.authenticate() on a platform that is not Android or iOS! ...returning false.",
        level: LogLevel.Error,
      );
      return false;
    }
    if (integrationTestFlag) {
      Logging.instance.log(
        "Tried to use Biometrics.authenticate() during integration testing. Returning false.",
        level: LogLevel.Warning,
      );
      return false;
    }

    final LocalAuthentication localAuth = LocalAuthentication();

    final canCheckBiometrics = await localAuth.canCheckBiometrics;
    final isDeviceSupported = await localAuth.isDeviceSupported();

    //todo: check if print needed
    // debugPrint("canCheckBiometrics: $canCheckBiometrics");
    // debugPrint("isDeviceSupported: $isDeviceSupported");

    if (canCheckBiometrics && isDeviceSupported) {
      final List<BiometricType> availableSystems =
          await localAuth.getAvailableBiometrics();

      //todo: check if print needed
      // debugPrint("availableSystems: $availableSystems");

      //TODO properly handle caught exceptions
      if (availableSystems.contains(BiometricType.strong)) {
        try {
          final bool didAuthenticate = await localAuth.authenticate(
            localizedReason: localizedReason,
            options: const AuthenticationOptions(
              stickyAuth: true,
              biometricOnly: true,
            ),
            authMessages: <AuthMessages>[
              AndroidAuthMessages(
                biometricHint: "",
                cancelButton: cancelButtonText,
                signInTitle: title,
              ),
            ],
          );

          if (didAuthenticate) {
            return true;
          }
        } catch (e) {
          Logging.instance.log(
            "local_auth exception caught in Biometrics.authenticate(), e: $e",
            level: LogLevel.Error,
          );
        }
      }

      // if (Platform.isIOS) {
      //   if (availableSystems.contains(BiometricType.face)) {
      //     try {
      //       final bool didAuthenticate = await localAuth.authenticate(
      //         localizedReason: localizedReason,
      //         options: const AuthenticationOptions(
      //           stickyAuth: true,
      //           biometricOnly: true,
      //         ),
      //       );
      //
      //       if (didAuthenticate) {
      //         return true;
      //       }
      //     } catch (e) {
      //       Logging.instance.log(
      //         "local_auth exception caught in Biometrics.authenticate(), e: $e",
      //         level: LogLevel.Error,
      //       );
      //     }
      //   } else if (availableSystems.contains(BiometricType.fingerprint)) {
      //     try {
      //       final bool didAuthenticate = await localAuth.authenticate(
      //         localizedReason: localizedReason,
      //         options: const AuthenticationOptions(
      //           stickyAuth: true,
      //           biometricOnly: true,
      //         ),
      //       );
      //
      //       if (didAuthenticate) {
      //         return true;
      //       }
      //     } catch (e) {
      //       Logging.instance.log(
      //         "local_auth exception caught in Biometrics.authenticate(), e: $e",
      //         level: LogLevel.Error,
      //       );
      //     }
      //   }
      // } else if (Platform.isAndroid) {
      //   if (availableSystems.contains(BiometricType.fingerprint)) {
      //     try {
      //       final bool didAuthenticate = await localAuth.authenticate(
      //         localizedReason: localizedReason,
      //         options: const AuthenticationOptions(
      //           stickyAuth: true,
      //           biometricOnly: true,
      //         ),
      //         authMessages: <AuthMessages>[
      //           AndroidAuthMessages(
      //             biometricHint: "",
      //             cancelButton: cancelButtonText,
      //             signInTitle: title,
      //           ),
      //         ],
      //       );
      //
      //       if (didAuthenticate) {
      //         return true;
      //       }
      //     } catch (e) {
      //       Logging.instance.log(
      //         "local_auth exception caught in Biometrics.authenticate(), e: $e",
      //         level: LogLevel.Error,
      //       );
      //     }
      //   }
      // }
    }

    // authentication failed
    return false;
  }
}