import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/scheduler.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:simplecloudnotifier/api/api_client.dart';
import 'package:simplecloudnotifier/main.dart';
import 'package:simplecloudnotifier/main_utils.dart';
import 'package:simplecloudnotifier/pages/channel_view/channel_view.dart';
import 'package:simplecloudnotifier/pages/message_view/message_view.dart';
import 'package:simplecloudnotifier/state/app_events.dart';
import 'package:simplecloudnotifier/state/application_log.dart';
import 'package:simplecloudnotifier/state/fb_message.dart';
import 'package:simplecloudnotifier/state/globals.dart';
import 'package:simplecloudnotifier/state/app_auth.dart';
import 'package:simplecloudnotifier/state/scn_data_cache.dart';
import 'package:simplecloudnotifier/utils/navi.dart';
import 'package:simplecloudnotifier/utils/notifier.dart';

@pragma('vm:entry-point')
void notificationTapBackground(NotificationResponse notificationResponse) {
  // I think only iOS triggers this, TODO
  ApplicationLog.info('Received local notification<vm:entry-point>: ${notificationResponse.id}');
}

@pragma('vm:entry-point')
Future<void> onBackgroundMessage(RemoteMessage message) async {
  // a firebase message was received while the app was in the background or terminated
  await _receiveMessage(message, false);
}

@pragma('vm:entry-point')
void onForegroundMessage(RemoteMessage message) {
  // a firebase message was received while the app was in the foreground
  _receiveMessage(message, true);
}

Future<void> _receiveMessage(RemoteMessage message, bool foreground) async {
  try {
    // ensure globals init
    if (!Globals().isInitialized) {
      print('[LATE-INIT] Init Globals() - to ensure working _receiveMessage($foreground)...');
      await Globals().init();
    }

    // ensure hive init
    if (!Globals().hiveInitialized) {
      print('[LATE-INIT] Init Hive - to ensure working _receiveMessage($foreground)...');
      await initHive();
    }

    // ensure hive init
    if (!Globals().hiveAdaptersRegistered) {
      print('[LATE-INIT] Init Hive-Adapter - to ensure working _receiveMessage($foreground)...');
      await registerHiveAdapter();
    }

    // ensure hive init
    if (!Globals().hiveBoxesOpened) {
      print('[LATE-INIT] Ensure hive boxes are open for _receiveMessage($foreground)...');
      await openHiveBoxes(false);
    }
  } catch (exc, trace) {
    ApplicationLog.writeRawFailure('Failed to init hive', {'exception': exc.toString(), 'trace': trace.toString(), 'data': message, 'foreground': foreground});
    ApplicationLog.error('Failed to init hive:' + exc.toString(), trace: trace);
    Notifier.showLocalNotification("", "@ERROR", "@ERROR", 'Error Channel', "Error", "Failed to receive SCN message (init failed)", null, null);
    return;
  }

  ApplicationLog.info('Received FB message (${foreground ? 'foreground' : 'background'}): ${message.messageId ?? 'NULL'}');

  String scn_msg_id;

  try {
    scn_msg_id = message.data['scn_msg_id'] as String;

    final timestamp = DateTime.fromMillisecondsSinceEpoch(int.parse(message.data['timestamp'] as String) * 1000);
    final title = message.data['title'] as String;
    final channel = message.data['channel'] as String;
    final channel_id = message.data['channel_id'] as String;
    final body = message.data['body'] as String;
    final prio = int.parse(message.data['priority'] as String);

    Notifier.showLocalNotification(scn_msg_id, channel_id, channel, 'Channel: ${channel}', title, body, timestamp, prio);
  } catch (exc, trace) {
    ApplicationLog.writeRawFailure('Failed to decode received FB message', {'exception': exc.toString(), 'trace': trace.toString(), 'data': message, 'foreground': foreground});
    ApplicationLog.error('Failed to decode received FB message' + exc.toString(), trace: trace);
    Notifier.showLocalNotification("", "@ERROR", "@ERROR", 'Error Channel', "Error", "Failed to receive SCN message (decode failed)", null, null);
    return;
  }

  try {
    FBMessageLog.insert(message);
  } catch (exc, trace) {
    ApplicationLog.writeRawFailure('Failed to persist received FB message', {'exception': exc.toString(), 'trace': trace.toString(), 'data': message, 'foreground': foreground});
    ApplicationLog.error('Failed to persist received FB message' + exc.toString(), trace: trace);
    Notifier.showLocalNotification("", "@ERROR", "@ERROR", 'Error Channel', "Error", "Failed to receive SCN message (persist failed)", null, null);
    return;
  }

  try {
    final msg = await APIClient.getMessage(AppAuth(), scn_msg_id);
    SCNDataCache().addToMessageCache([msg]);
    if (foreground) AppEvents().notifyMessageReceivedListeners(msg);
  } catch (exc, trace) {
    ApplicationLog.writeRawFailure('Failed to query+persist message', {'exception': exc.toString(), 'trace': trace.toString(), 'data': message, 'foreground': foreground});
    ApplicationLog.error('Failed to query+persist message: ' + exc.toString(), trace: trace);
    return;
  }
}

void receiveLocalDarwinNotification(int id, String? title, String? body, String? payload) {
  //TODO iOS?
  ApplicationLog.info('Received local notification<darwin>: $id -> [$title]');
}

void receiveLocalNotification(NotificationResponse details) {
  // User has tapped a flutter_local notification, while the app was running
  ApplicationLog.info('Tapped local notification: [[${details.id} | ${details.actionId} | ${details.input} | ${details.notificationResponseType} | ${details.payload}]]');

  handleNotificationClickAction(details.payload, Duration.zero);
}

void handleNotificationClickAction(String? payload, Duration delay) {
  final parts = payload?.split('\n') ?? [];

  if (parts.length == 4 && parts[0] == '@SCN_MESSAGE') {
    final messageID = parts[1];
    () async {
      await Future.delayed(delay, () {});

      SchedulerBinding.instance.addPostFrameCallback((_) {
        ApplicationLog.info('Handle notification action @SCN_MESSAGE --> ${messageID}');
        Navi.push(SCNApp.materialKey.currentContext!, () => MessageViewPage(messageID: messageID, preloadedData: null));
      });
    }();
  } else if (parts.length == 3 && parts[0] == '@SCN_MESSAGE_SUMMARY') {
    final channelID = parts[1];
    () async {
      await Future.delayed(delay, () {});

      SchedulerBinding.instance.addPostFrameCallback((_) {
        ApplicationLog.info('Handle notification action @SCN_MESSAGE_SUMMARY --> ${channelID}');
        Navi.push(SCNApp.materialKey.currentContext!, () => ChannelViewPage(channelID: channelID, preloadedData: null, needsReload: null));
      });
    }();
  }
}

List<DarwinNotificationCategory> getDarwinNotificationCategories() {
  return <DarwinNotificationCategory>[
    //TODO ?!?
  ];
}