import 'dart:async';
import 'dart:convert';
import 'dart:typed_data';

import 'package:badges/badges.dart' as badges;
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:image_picker/image_picker.dart';
import 'package:loader_overlay/loader_overlay.dart';
import 'package:package_info_plus/package_info_plus.dart';

import '../../../../api/mhsl/server/feedback/add_feedback.dart';
import '../../../../api/mhsl/server/feedback/add_feedback_params.dart';
import '../../../../model/account_data.dart';
import '../../../../state/app/modules/settings/bloc/settings_cubit.dart';
import '../../../../widget/file_pick.dart';
import '../../../../widget/focus_behaviour.dart';
import '../../../../widget/info_dialog.dart';

class FeedbackDialog extends StatefulWidget {
  const FeedbackDialog({super.key});

  @override
  State<FeedbackDialog> createState() => _FeedbackDialogState();
}

class _FeedbackDialogState extends State<FeedbackDialog> {
  final ImagePicker picker = ImagePicker();

  final TextEditingController _feedbackInput = TextEditingController();
  Uint8List? _image;
  String? _error;
  bool _textFieldEmpty = false;

  @override
  void initState() {
    super.initState();
    _feedbackInput.addListener(() {
      setState(() {
        _textFieldEmpty = _feedbackInput.text.isEmpty;
        _error = null;
      });
    });
  }

  @override
  Widget build(BuildContext context) => Scaffold(
    appBar: AppBar(title: const Text('Feedback')),
    body: SingleChildScrollView(
      child: Column(
        mainAxisSize: MainAxisSize.max,
        children: [
          const SizedBox(height: 5),
          const Text(
            'Feedback, Anregungen, Ideen, Fehler und Verbesserungen',
            textAlign: TextAlign.center,
          ),
          const SizedBox(height: 15),
          const Text(
            'Bitte gib keine geheimen Daten wie z.B. Passwörter weiter.',
            textAlign: TextAlign.center,
            style: TextStyle(fontSize: 11),
          ),
          const SizedBox(height: 20),
          Padding(
            padding: const EdgeInsets.all(10),
            child: TextField(
              onChanged: (value) {
                if (value.trim().toLowerCase() == 'ranzig') {
                  _feedbackInput.text = 'selber';
                }
              },
              controller: _feedbackInput,
              autofocus: true,
              decoration: InputDecoration(
                border: const OutlineInputBorder(),
                label: const Text('Feedback und Verbesserungen'),
                errorText: _textFieldEmpty
                    ? 'Bitte gib eine Beschreibung an!'
                    : null,
              ),
              minLines: 4,
              maxLines: 7,
              onTapOutside: (PointerDownEvent event) =>
                  FocusBehaviour.textFieldTapOutside(context),
            ),
          ),
          const SizedBox(height: 10),
          if (_image != null)
            Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                badges.Badge(
                  badgeContent: const Icon(Icons.close_outlined, size: 17),
                  badgeStyle: const badges.BadgeStyle(
                    padding: EdgeInsets.all(2),
                  ),
                  child: Container(
                    decoration: BoxDecoration(
                      borderRadius: const BorderRadius.all(Radius.circular(5)),
                      border: Border.all(
                        width: 3,
                        color: Theme.of(context).primaryColor,
                      ),
                    ),
                    height: 150,
                    child: Image(
                      image: Image.memory(_image!).image,
                      fit: BoxFit.contain,
                    ),
                  ),
                  onTap: () async {
                    setState(() {
                      _image = null;
                    });
                  },
                ),
              ],
            ),
          Padding(
            padding: const EdgeInsets.all(5),
            child: Visibility(
              visible: _error != null,
              child: Visibility(
                visible: context.read<SettingsCubit>().val().devToolsEnabled,
                replacement: const Text(
                  'Senden fehlgeschlagen, bitte überprüfe die Internetverbindung.',
                  textAlign: TextAlign.center,
                  style: TextStyle(color: Colors.red),
                ),
                child: Text(
                  'Senden fehlgeschlagen: \n $_error',
                  textAlign: TextAlign.center,
                  style: const TextStyle(color: Colors.red),
                ),
              ),
            ),
          ),
          Padding(
            padding: const EdgeInsets.only(right: 20, left: 10),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.end,
              children: [
                Visibility(
                  visible: _image == null,
                  child: IconButton(
                    onPressed: () async {
                      context.loaderOverlay.show();
                      final picked = await FilePick.multipleGalleryPick();
                      final imageData = await picked?.first.readAsBytes();
                      if (context.mounted) context.loaderOverlay.hide();
                      setState(() {
                        _image = imageData;
                      });
                    },
                    icon: const Icon(Icons.attach_file_outlined),
                  ),
                ),
                const Expanded(child: SizedBox.shrink()),
                TextButton(
                  onPressed: () async {
                    if (_feedbackInput.text.isEmpty) {
                      setState(() {
                        _textFieldEmpty = true;
                      });
                      return;
                    }
                    context.loaderOverlay.show();
                    unawaited(
                      AddFeedback(
                            AddFeedbackParams(
                              user: AccountData().getUserSecret(),
                              feedback: _feedbackInput.text,
                              screenshot: _image != null
                                  ? base64Encode(_image!)
                                  : null,
                              appVersion: int.parse(
                                (await PackageInfo.fromPlatform()).buildNumber,
                              ),
                            ),
                          )
                          .run()
                          .then((value) {
                            if (!context.mounted) return;
                            Navigator.of(context).pop();
                            InfoDialog.show(
                              context,
                              'Danke für dein Feedback!',
                            );
                            context.loaderOverlay.hide();
                          })
                          .catchError((Object error, StackTrace trace) {
                            if (!mounted) return;
                            setState(() {
                              _error = error.toString();
                            });
                            if (!context.mounted) return;
                            context.loaderOverlay.hide();
                          }),
                    );
                  },
                  child: const Text('Senden'),
                ),
              ],
            ),
          ),
        ],
      ),
    ),
  );
}