import 'package:flutter/material.dart';
import 'package:flutter_chat_ui/flutter_chat_ui.dart';
import 'package:flutter_chat_types/flutter_chat_types.dart' as types;
import 'package:intl/intl.dart';
import 'package:isar/isar.dart';
import 'package:stadtbote/content_views/utils/content_view_widget.dart';
import 'package:stadtbote/content_views/utils/header_info.dart';
import 'package:stadtbote/main.dart';
import 'package:stadtbote/model/message.dart' as sbmessage;
import 'package:stadtbote/model/status.dart';
import 'package:stadtbote/popups/infos_popup.dart';
import 'package:uuid/uuid.dart';

import '../tools/util.dart';

class MessagesPage extends ContentViewWidget {
  const MessagesPage({super.key});

  @override
  State<MessagesPage> createState() => _MessagesPageState();

  @override
  Future<HeaderInfo> getHeaderInfo(BuildContext context) async {
    return HeaderInfo(
        titleWidget: const Text(
          'Nachrichten',
          style: TextStyle(
            color: Colors.white,
            fontSize: 24.0,
          ),
        ),
        rightButtonEnabled: true,
        rightButtonVisible: true,
        rightButtonImage: Util.fetchFutureIcon(const Icon(Icons.info_outline, size: 20.0, color: Colors.white)),
        rightButtonOnPressed: () async {
          showInfosPopup(context, await MyApp.isarInstance.status.where().findFirst());
        });
  }
}

class _MessagesPageState extends State<MessagesPage> {
  bool _initCompleted = false;

  late String _sid;

  late final List<types.Message> _messages = [];

  final _user = const types.User(
    id: '82091008-a484-4a89-ae75-a22bf8d6f3ac',
  );

  final _central = const types.User(
    id: '82091008-a484-4a89-ae75-a22bf8d6f3ad',
  );

  @override
  void initState() {
    super.initState();

    Future.delayed(const Duration(seconds: 0), () async {
      var status = await MyApp.isarInstance.status.where().findFirst();
      _sid = status != null ? status.sid : 'Unbekannt';

      await _fetchMessages();

      _initCompleted = true;

      setState(() {});
    });
  }

  @override
  Widget build(BuildContext context) {
    if (!_initCompleted) {
      return Util.getWaitWidget(context);
    }

    return Stack(
      children: [
        Chat(
          messages: _messages,
          onSendPressed: _handleSendPressed,
          showUserAvatars: false,
          showUserNames: false,
          user: _user,
        ),
      ],
    );
  }

  void _handleSendPressed(types.PartialText text) async {
    var message = sbmessage.Message();
    message.text = [text.text];
    message.from = _sid;
    message.subj = '';
    message.time = DateFormat("yyyy.mm.dd HH:mm").format(DateTime.now());
    message.id = 0;

    MyApp.isarInstance.writeTxnSync(() {
      MyApp.isarInstance.messages.putSync(message);
    });

    _messages.insert(0, types.TextMessage(
      author: _user,
      createdAt: DateTime.now().millisecondsSinceEpoch,
      id: const Uuid().v4().toString(),
      text: text.text,
    ));

    setState(() {});
  }

  Future<void> _fetchMessages() async {
    _messages.clear();

    var messages = await MyApp.isarInstance.messages.where().findAll();
    for (var message in messages) {
      var text = '';
      for (var textLine in message.text) {
        text += '$textLine\n';
      }

      _messages.add(types.TextMessage(
        author: message.from == _sid ? _user : _central,
        createdAt: DateTime.now().millisecondsSinceEpoch,
        id: const Uuid().v4().toString(),
        text: text,
      ));

      setState(() {});
    }

    Util.logInfo('');
  }
}