import 'dart:async';

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:fcs/vo/notification.dart';

import 'base_model.dart';
import 'constants.dart';
import 'firebase_helper.dart';

class NotificationModel extends BaseModel {
  int filer=0;
  List<Notification> notifications = [];

  var filterValues = {1: "po", 2: "do", 3: "buyer"};
  List<Notification> get notis {
    return notifications
        .where((n) => filer == 0 || n.itemType == filterValues[filer])
        .toList();
  }

  int unseen = 0;

  void initUser(user) {
    super.initUser(user);
    _loadNotifications();
  }


  @override
  logout() async {
    notifications = [];
  }

  Future<void> _loadNotifications() async {
    Stream<QuerySnapshot> snapshots = Firestore.instance
        .collection(
            "/$biz_collection/${setting.okEnergyId}/$user_collection/${user.docID}/$notification_collection")
        .orderBy("time", descending: true)
        .limit(50)
        .snapshots();

    snapshots.listen((snaps) async {
      notifications.clear();
      unseen = 0;
      // snaps.documentChanges.forEach((c) {
      //   if (c.type == DocumentChangeType.added) {
      //     FlutterRingtonePlayer.play(
      //       android: AndroidSounds.notification,
      //       ios: IosSounds.glass,
      //     );
      //   }
      // });
      snaps.documents.forEach((d) {
        var n = Notification.fromMap(d.data, d.documentID);
        if (!n.seen) unseen++;
        notifications.add(n);
      });
      notifyListeners();
    });
  }

  void filter(int filter) {
    this.filer = filter;
  }

  Future<void> seen() async {
    await request("/notification/seen", "POST", token: await getToken());
  }

  Future<void> seenID(String id) async {
    await request("/notification/seen/${user.docID}/$id", "POST",
        token: await getToken());
  }
}