import 'dart:io';

import 'package:audioplayers/audioplayers.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:image_picker/image_picker.dart';
import 'package:package_info_plus/package_info_plus.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:stadtbote/main.dart';
import 'package:stadtbote/model/job.dart';
import 'package:stadtbote/model/log_entry.dart';
import 'package:stadtbote/tools/constants.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:uuid/uuid.dart';

import '../Tools/colored_safe_area.dart';

class Util {
  static Future<bool> preferencesContainsKey(String key) async {
    var prefs = await SharedPreferences.getInstance();
    return prefs.containsKey(key);
  }

  static void preferencesSaveString(String key, String value) async {
    var prefs = await SharedPreferences.getInstance();
    await prefs.setString(key, value);
  }

  static Future<String?> preferencesGetString(String key, String? defaultValue) async {
    if (await preferencesContainsKey(key)) {
      var prefs = await SharedPreferences.getInstance();
      return prefs.getString(key);
    }

    return defaultValue;
  }

  static void preferencesSaveInt(String key, int value) async {
    var prefs = await SharedPreferences.getInstance();
    await prefs.setInt(key, value);
  }

  static Future<int?> preferencesGetInt(String key, int? defaultValue) async {
    if (await preferencesContainsKey(key)) {
      var prefs = await SharedPreferences.getInstance();
      return prefs.getInt(key);
    }

    return defaultValue;
  }

  static void preferencesSaveBool(String key, bool value) async {
    var prefs = await SharedPreferences.getInstance();
    await prefs.setBool(key, value);
  }

  static Future<bool> preferencesGetBool(String key, bool defaultValue) async {
    if (await preferencesContainsKey(key)) {
      var prefs = await SharedPreferences.getInstance();
      return prefs.getBool(key) as bool;
    }

    return defaultValue;
  }

  static Future<String> getAppUuid() async {
    var currentUuid = await preferencesGetString('uuid', null);

    if (currentUuid == null) {
      currentUuid ??= const Uuid().v4();

      preferencesSaveString("uuid", currentUuid);
    }

    return currentUuid;
  }

  static Future<int> getAppVersion() async {
    PackageInfo packageInfo = await PackageInfo.fromPlatform();

    return int.parse(packageInfo.version.replaceAll(".0.0", ""));
  }

  static _printLongText(String text) {
    final pattern = RegExp('.{1,800}'); // 800 is the size of each chunk
    pattern.allMatches(text).forEach((match) => debugPrint(match.group(0)));
  }

  static void _persistLogMessage(String text, LogEntrySeverityEnum severity) async {
    var logEntry = LogEntry();
    logEntry.time = DateTime.now();
    logEntry.text = text;
    logEntry.severity = severity;

    await MyApp.isarInstance.writeTxn(() async {
      await MyApp.isarInstance.logEntrys.put(logEntry);
    });
  }

  static logInfo(String message) {
    _printLongText(message);

    _persistLogMessage(message, LogEntrySeverityEnum.info);
  }

  static logDebug(String message) {
    _printLongText(message);

    _persistLogMessage(message, LogEntrySeverityEnum.debug);
  }

  static logException(String message) {
    _printLongText(message);

    _persistLogMessage(message, LogEntrySeverityEnum.error);
  }

  static int fastHash(String string) {
    var hash = 0xcbf29ce484222325;

    var i = 0;
    while (i < string.length) {
      final codeUnit = string.codeUnitAt(i++);
      hash ^= codeUnit >> 8;
      hash *= 0x100000001b3;
      hash ^= codeUnit & 0xFF;
      hash *= 0x100000001b3;
    }

    return hash;
  }

  static Widget getWaitWidget(context) {
    return ColoredSafeArea(
      key: const Key('value'),
      child: Container(
        width: 10,
        height: 10,
        color: Colors.white,
      ),
    );
  }

  static Future<Widget> fetchFutureIcon(icon) {
    return Future.delayed(const Duration(seconds: 0), () async {
      return icon;
    });
  }

  static TextField getDefaultTextField(String hint,
      {TextEditingController? controller,
      FocusNode? focusNode,
      IconButton? iconButton,
      int? maxLines = 1,
      int? maxLength = 100,
      TextInputType? textInputType,
      List<TextInputFormatter>? formatter,
      Function()? onTap,
      bool? autofocus}) {
    iconButton ??= IconButton(
      icon: const Icon(Icons.clear),
      onPressed: () {
        if (controller != null) {
          controller.text = "";
        }
      },
    );

    return TextField(
      controller: controller,
      focusNode: focusNode,
      maxLines: maxLines,
      onTap: onTap,
      keyboardType: textInputType,
      inputFormatters: formatter,
      maxLength: maxLength,
      autofocus: (autofocus != null) ? autofocus : false,
      decoration: InputDecoration(
          hintText: hint,
          contentPadding: const EdgeInsets.all(10),
          border: Util.getDefaultBorder(),
          errorBorder: Util.getDefaultBorder(),
          disabledBorder: Util.getDefaultBorder(),
          focusedBorder: Util.getDefaultFocusedBorder(),
          focusedErrorBorder: Util.getDefaultBorder(),
          suffixIcon: iconButton,
          labelText: hint),
    );
  }

  static OutlineInputBorder getDefaultBorder() {
    return const OutlineInputBorder(borderRadius: BorderRadius.all(Radius.circular(20.0)));
  }

  static OutlineInputBorder getDefaultFocusedBorder() {
    return const OutlineInputBorder(
      borderSide: BorderSide(color: Constants.colorPrimary),
      borderRadius: BorderRadius.all(Radius.circular(20.0)),
    );
  }

  static Future<File?> capturePhoto() async {
    final imagePicker = ImagePicker();
    final pickedFile = await imagePicker.pickImage(source: ImageSource.camera);

    if (pickedFile != null) {
      return File(pickedFile.path);
    }

    return null;
  }

  static Future<void> startBrowser(String websiteUrl) async {
    if (!await launchUrl(Uri.parse(websiteUrl))) {
      throw Exception('Could not launch $websiteUrl');
    }
  }

  static Future<void> playMp3(String name) async {
    final player = AudioPlayer();
    await player.play(AssetSource('sounds/$name'), volume: 1);
  }
}

Widget getDefaultButton(String text, Function() onPressed, {Image? image, double? buttonHeight, bool enabledTimerActive = false, int enabledTimerDelay = 0}) {
  bool enabledState = !enabledTimerActive;

  return StatefulBuilder(builder: (BuildContext context, StateSetter setState) {
    if (!enabledState) {
      Future.delayed(Duration(seconds: enabledTimerDelay), () {
        enabledState = true;

        if (context.mounted) {
          setState(() {});
        }
      });
    }
    return SizedBox(
      height: buttonHeight ?? 50,
      child: MaterialButton(
        color: const Color.fromARGB(255, 220, 220, 220),
        disabledColor: const Color.fromARGB(255, 220, 220, 220),
        disabledElevation: 5,
        elevation: 5,
        shape: const RoundedRectangleBorder(
          borderRadius: BorderRadius.all(
            Radius.circular(15),
          ),
        ),
        onPressed: () {
          if (enabledState) {
            Util.logInfo("Button \"$text\" clicked");

            onPressed();
          }
        },
        child: Row(
          mainAxisAlignment: MainAxisAlignment.start,
          children: <Widget>[
            Visibility(
              visible: image != null,
              child: CircleAvatar(
                backgroundColor: Colors.transparent,
                child: image,
              ),
            ),
            Expanded(
              child: Opacity(
                opacity: enabledState ? 1.0 : 0.3,
                child: Text(
                  text,
                  style: const TextStyle(color: Colors.black, fontSize: 14.0),
                  textAlign: TextAlign.center,
                ),
              ),
            ),
          ],
        ),
      ),
    );
  });
}

String mapVehicleTypeToImageName(int vehType)
{
  switch (vehType) {
    case 1:
      return "fahrrad.png";

    case 2:
      return "pkw.png";

    case 3:
      return "kombi.png";

    case 4:
      return "kasten.png";

    case 5:
      return "bus.png";

    case 6:
      return "grbus.png";

    case 7:
      return "lkw.png";

    case 8:
      return "lkw_12.png";

    case 10:
      return "lkw_8.png";

    case 11:
      return "lkw_10.png";

    case 12:
      return "lkw_15.png";

    case 13:
      return "lkw_20.png";

    case 999:
      return "service.png";
  }

  return "unbekannt.png";
}

String mapVehicleTypeToText(int vehType) {
  switch (vehType) {
    case 1:
      return "Fahrrad";

    case 2:
      return "Pkw";

    case 3:
      return "Kombi";

    case 4:
      return "Kasten";

    case 5:
      return "Bus";

    case 6:
      return "GrBus";

    case 7:
    case 8:
    case 10:
    case 11:
    case 12:
    case 13:
    case 14:
      return "Lkw";

    case 999:
      return "Service";
  }

  return "!?????!";
}

String mapTourMode(String mode) {
  var text = "";
  switch (mode) {
    case "pu":
      text += "/ Abholung";
      break;

    case "del":
      text += "/ Auslieferung";
      break;

    case "pu/del":
      text += "/ Abholung/Auslieferung";
      break;
  }

  return text;
}

Future<void> showQuestionDialog(BuildContext context, String title, String message, List<Widget> actions) async {
  await showDialog(
      context: context,
      builder: (context) {
        return AlertDialog(
          title: Text(title),
          content: Text(message),
          actions: actions,
        );
      }
  );
}

Future<void> showAlertDialog(String title, String message) async {
  await showDialog(
      context: MyApp.appNavigatorKey.currentContext!,
      builder: (context) {
        return AlertDialog(
          title: Text(title),
          content: Text(message),
          actions: [
            TextButton(
              onPressed: () => Navigator.pop(context),
              child: const Text('OK'),
            ),
          ],
        );
      }
  );
}

Future<void> showMessageDialog(BuildContext context, String title, String message) async {
  await showDialog(
    barrierDismissible: false,
    context: context,
    builder: (context) {
      return AlertDialog(
        title: Text(title),
        content: Text(message),
      );
    }
  );
}

class DecimalTextInputFormatter extends TextInputFormatter {
  int maxLength;
  
  int decimalPlaces;

  DecimalTextInputFormatter({required this.maxLength, required this.decimalPlaces});

  @override
  TextEditingValue formatEditUpdate(TextEditingValue oldValue, TextEditingValue newValue) {
    var text = newValue.text;
    String? filteredText = "";

    if (text != "") {
      RegExp regExp;
      if (decimalPlaces > 0) {
        regExp = RegExp(r'[0-9]+[,]{0,1}[0-9]{0,${' + decimalPlaces.toString() + '}');
      } else {
        regExp = RegExp(r'[0-9]{0,' + maxLength.toString() +'}');
      }
      filteredText = regExp.stringMatch(text);
    }

    return TextEditingValue(text: filteredText ?? oldValue.text);
  }
}

bool isJobInFuture(Job job) {
  return DateTime.parse(job.ordertime).add(Duration(minutes: job.offsWarn)).toUtc().millisecondsSinceEpoch > DateTime.now().toUtc().millisecondsSinceEpoch;
}

Future<bool> taskDialogSecurityException(BuildContext context) async {
  bool close = false;

  await showQuestionDialog(context, "Achtung", "Wenn Sie den Dialog jetzt schließen gehen erfasste Daten verloren und die Aufgabe oder Station bleibt unerledigt.", [
    TextButton(onPressed: () => {Navigator.of(MyApp.appNavigatorKey.currentContext!).pop(), close = true}, child: const Text('Schließen')),
    TextButton(onPressed: () => {Navigator.of(MyApp.appNavigatorKey.currentContext!).pop(), close = false}, child: const Text('Zurück')),
  ]);

  if (close) {
    Navigator.of(MyApp.appNavigatorKey.currentContext!).pop();
  }

  return close;
}