import 'package:awesome_dialog/awesome_dialog.dart';
import 'package:flutter/material.dart';
import 'package:mobile_scanner/mobile_scanner.dart';
import 'package:provider/provider.dart';
import 'package:smoke_cess_app/models/settings.dart';
import 'package:smoke_cess_app/services/json_service.dart';
import 'package:smoke_cess_app/services/settings_service.dart';
import 'package:smoke_cess_app/widgets/buttons/text_icon_button.dart';
import '../providers/settings_provider.dart';
import '../services/notification_service.dart';
import '../globals.dart' as globals;

class MyScanner extends StatelessWidget {
  const MyScanner({super.key});

  @override
  Widget build(BuildContext context) {
    SettingsProvider settingsProvider = context.watch<SettingsProvider>();

    void handleSuccess(String? rawValue) {
      String qrText = rawValue!;
      Map<String, dynamic> json = stringToJSON(qrText);
      Settings settings = Settings.fromJson(json);
      saveSettings(settings);
      settingsProvider.initSettings();
      NotificationService().setAllNotifications();
      settingsProvider.scanning = false;

      AwesomeDialog(
        context: context,
        dialogType: DialogType.success,
        title: 'Geschafft',
        desc: 'Der Code wurde erfolgreich gescannt!',
      ).show();
    }

    void handleError() {
      settingsProvider.scanning = false;

      AwesomeDialog(
        context: context,
        dialogType: DialogType.error,
        title: 'Fehler',
        desc: 'Der QR-Code war fehlerhaft!',
      ).show();
    }

    void onDetect(capture) {
      try {
        final List<Barcode> barcodes = capture.barcodes;
        for (final barcode in barcodes) {
          if (barcode.rawValue != null) {
            return handleSuccess(barcode.rawValue);
          }
        }
      } catch (e) {
        handleError();
      }
    }

    void loadJSON(BuildContext context) async {
      SettingsProvider settingsModel = context.read<SettingsProvider>();
      await loadSettingsFromLocalJSON();
      settingsModel.initSettings();
      NotificationService().setAllNotifications();
      if (context.mounted) {
        AwesomeDialog(
          context: context,
          dialogType: DialogType.success,
          title: 'Geschafft',
          desc: 'Die Einstellung wurden erfolgreich gespeichert',
        ).show();
      }
    }

    return settingsProvider.scanning
        ? Expanded(
            child: Stack(
            alignment: Alignment.center,
            children: [
              MobileScanner(
                fit: BoxFit.contain,
                controller: MobileScannerController(
                  detectionTimeoutMs: 2000,
                ),
                onDetect: onDetect,
              ),
              ClipRRect(
                  borderRadius: BorderRadius.circular(20),
                  child: Container(
                      height: MediaQuery.of(context).size.height / 3,
                      width: MediaQuery.of(context).size.width * 0.8,
                      color: Colors.white.withOpacity(0.4))),
            ],
          ))
        : TextIconButton(
            text: "Scan",
            onPressed: globals.useLocalConfig
                ? () => loadJSON(context)
                : () => settingsProvider.scanning = true,
            iconData: Icons.qr_code_scanner_outlined);
  }
}