import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:provider/provider.dart';
import 'package:qr_flutter/qr_flutter.dart';
import 'package:simplecloudnotifier/api/api_client.dart';
import 'package:simplecloudnotifier/state/application_log.dart';
import 'package:simplecloudnotifier/state/globals.dart';
import 'package:simplecloudnotifier/utils/toaster.dart';
import 'package:simplecloudnotifier/utils/ui.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:simplecloudnotifier/state/app_auth.dart';

class SendRootPage extends StatefulWidget {
  const SendRootPage({super.key, required this.isVisiblePage});

  final bool isVisiblePage;

  @override
  State<SendRootPage> createState() => _SendRootPageState();
}

class _SendRootPageState extends State<SendRootPage> {
  late TextEditingController _msgTitle;
  late TextEditingController _msgContent;
  late TextEditingController _channelName;
  late TextEditingController _senderName;

  int _priority = 0;

  bool _expanded = false;

  @override
  void initState() {
    super.initState();
    _msgTitle = TextEditingController();
    _msgContent = TextEditingController();
    _channelName = TextEditingController();
    _senderName = TextEditingController();
  }

  @override
  void dispose() {
    _msgTitle.dispose();
    _msgContent.dispose();
    _channelName.dispose();
    _senderName.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Consumer<AppAuth>(
      builder: (context, acc, child) {
        return SingleChildScrollView(
          child: Padding(
            padding: const EdgeInsets.all(16.0),
            child: _expanded ? _buildExpanded(context, acc) : _buildSimple(context, acc),
          ),
        );
      },
    );
  }

  Widget _buildSimple(BuildContext context, AppAuth acc) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        _buildQRCode(context, acc),
        const SizedBox(height: 16),
        FractionallySizedBox(
          widthFactor: 1.0,
          child: TextField(
            controller: _msgTitle,
            decoration: const InputDecoration(
              border: OutlineInputBorder(),
              labelText: 'Title',
            ),
          ),
        ),
        const SizedBox(height: 16),
        FractionallySizedBox(
          widthFactor: 1.0,
          child: TextField(
            controller: _msgContent,
            decoration: const InputDecoration(
              border: OutlineInputBorder(),
              labelText: 'Text',
            ),
            minLines: 2,
            maxLines: null,
            keyboardType: TextInputType.multiline,
          ),
        ),
        const SizedBox(height: 16),
        Row(
          children: [
            Expanded(
              child: UI.button(
                text: 'Send',
                onPressed: () {
                  _sendSimple(acc);
                },
                color: Theme.of(context).colorScheme.primary,
                textColor: Theme.of(context).colorScheme.onPrimary,
              ),
            ),
            const SizedBox(width: 8),
            UI.buttonIconOnly(
              icon: FontAwesomeIcons.layerPlus,
              onPressed: _openExpanded,
              square: true,
              color: Theme.of(context).colorScheme.secondary,
              iconColor: Theme.of(context).colorScheme.onSecondary,
            ),
          ],
        ),
        const SizedBox(height: 32),
      ],
    );
  }

  Widget _buildExpanded(BuildContext context, AppAuth acc) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        FractionallySizedBox(
          widthFactor: 1.0,
          child: TextField(
            controller: _channelName,
            decoration: const InputDecoration(
              border: OutlineInputBorder(),
              labelText: 'Channel',
            ),
          ),
        ),
        const SizedBox(height: 16),
        FractionallySizedBox(
          widthFactor: 1.0,
          child: TextField(
            controller: _msgTitle,
            decoration: const InputDecoration(
              border: OutlineInputBorder(),
              labelText: 'Title',
            ),
          ),
        ),
        const SizedBox(height: 16),
        FractionallySizedBox(
          widthFactor: 1.0,
          child: TextField(
            controller: _senderName,
            decoration: const InputDecoration(
              border: OutlineInputBorder(),
              labelText: 'SenderName',
            ),
          ),
        ),
        const SizedBox(height: 16),
        SegmentedButton<int>(
          showSelectedIcon: false,
          segments: const <ButtonSegment<int>>[
            ButtonSegment<int>(value: 0, label: Text('Low Priority')),
            ButtonSegment<int>(value: 1, label: Text('Normal')),
            ButtonSegment<int>(value: 2, label: Text('High Priority')),
          ],
          selected: {_priority},
          onSelectionChanged: (Set<int> newSelection) {
            setState(() {
              _priority = newSelection.isEmpty ? 1 : newSelection.first;
            });
          },
        ),
        const SizedBox(height: 16),
        FractionallySizedBox(
          widthFactor: 1.0,
          child: TextField(
            controller: _msgContent,
            decoration: const InputDecoration(
              border: OutlineInputBorder(),
              labelText: 'Text',
            ),
            minLines: 6,
            maxLines: null,
            keyboardType: TextInputType.multiline,
          ),
        ),
        const SizedBox(height: 16),
        Row(
          children: [
            Expanded(
              child: UI.button(
                text: 'Send',
                onPressed: () {
                  _sendExpanded(acc);
                },
                color: Theme.of(context).colorScheme.primary,
                textColor: Theme.of(context).colorScheme.onPrimary,
              ),
            ),
            const SizedBox(width: 8),
            UI.buttonIconOnly(
              icon: FontAwesomeIcons.squareDashed,
              onPressed: _closeExpanded,
              square: true,
              color: Theme.of(context).colorScheme.secondary,
              iconColor: Theme.of(context).colorScheme.onSecondary,
            ),
          ],
        ),
        const SizedBox(height: 32),
      ],
    );
  }

  Widget _buildQRCode(BuildContext context, AppAuth acc) {
    if (!acc.isAuth()) {
      return const Placeholder();
    }

    return FutureBuilder(
      future: acc.loadUser(force: false),
      builder: ((context, snapshot) {
        if (snapshot.connectionState == ConnectionState.active || snapshot.connectionState == ConnectionState.waiting) {
          return const SizedBox(
            width: 300.0,
            height: 300.0,
            child: Center(child: CircularProgressIndicator()),
          );
        }
        if (snapshot.hasError) {
          return Text('Error: ${snapshot.error}'); //TODO better error display
        }
        if (snapshot.connectionState != ConnectionState.done) {
          return Text('...'); //?
        }

        var url = (acc.tokenSend == null) ? 'https://simplecloudnotifier.de?preset_user_id=${acc.userID}' : 'https://simplecloudnotifier.de?preset_user_id=${acc.userID}&preset_user_key=${acc.tokenSend}';

        return GestureDetector(
          onTap: () {
            _openWeb(url);
          },
          child: QrImageView(
            data: url,
            version: QrVersions.auto,
            size: 300.0,
            eyeStyle: QrEyeStyle(
              eyeShape: QrEyeShape.square,
              color: Theme.of(context).textTheme.bodyLarge?.color,
            ),
            dataModuleStyle: QrDataModuleStyle(
              dataModuleShape: QrDataModuleShape.square,
              color: Theme.of(context).textTheme.bodyLarge?.color,
            ),
          ),
        );
      }),
    );
  }

  void _sendSimple(AppAuth acc) async {
    if (!acc.isAuth()) {
      Toaster.error("Error", 'Must be logged in to send messages');
      return;
    }

    try {
      await APIClient.sendMessage(acc.userID!, acc.tokenSend!, _msgContent.text);
      Toaster.success("Success", 'Message sent');
      setState(() {
        _msgTitle.clear();
        _msgContent.clear();
      });
    } catch (e, stackTrace) {
      Toaster.error("Error", 'Failed to send message: ${e.toString()}');
      ApplicationLog.error('Failed to send message', trace: stackTrace);
    }
  }

  void _sendExpanded(AppAuth acc) async {
    if (!acc.isAuth()) {
      Toaster.error("Error", 'Must be logged in to send messages');
      return;
    }

    try {
      await APIClient.sendMessage(acc.userID!, acc.tokenSend!, _msgContent.text, channel: _channelName.text, senderName: _senderName.text, priority: _priority);
      Toaster.success("Success", 'Message sent');
      setState(() {
        _msgTitle.clear();
        _msgContent.clear();
      });
    } catch (e, stackTrace) {
      Toaster.error("Error", 'Failed to send message: ${e.toString()}');
      ApplicationLog.error('Failed to send message', trace: stackTrace);
    }
  }

  void _openWeb(String url) async {
    try {
      final Uri uri = Uri.parse(url);

      ApplicationLog.debug('Opening URL: [ ${uri.toString()} ]');

      if (await canLaunchUrl(uri)) {
        await launchUrl(uri);
      } else {
        Toaster.error("Error", 'Cannot open URL on this system');
      }
    } catch (exc, trace) {
      ApplicationLog.error('Failed to open URL: ' + exc.toString(), additional: 'URL: ${url}', trace: trace);
    }
  }

  void _closeExpanded() {
    setState(() {
      _expanded = false;
      _channelName.clear();
      _priority = 1;
      _senderName.clear();
    });
  }

  void _openExpanded() {
    final userAcc = Provider.of<AppAuth>(context, listen: false);

    setState(() {
      _expanded = true;
      _channelName.text = userAcc.getUserOrNull()?.defaultChannel ?? 'main';
      _priority = 1;
      _senderName.text = Globals().deviceName;
    });
  }
}