import 'dart:async';

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

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

class AnnouncementModel extends BaseModel {
  List<Announcement> announcements = [];

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

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

  Future<void> _loadAnnouncements() async {
    Stream<QuerySnapshot> snapshots = Firestore.instance
        .collection(
            "/$biz_collection/${setting.okEnergyId}/$announcement_collection")
        .snapshots();

    snapshots.listen((snaps) async {
      announcements = snaps.documents.map((documentSnapshot) {
        var data = Announcement.fromMap(
            documentSnapshot.data, documentSnapshot.documentID);
        return data;
      }).toList();

      notifyListeners();
    });
  }

  Future<Announcement> getAnnouncement(String id) async {
    String path =
        "/$biz_collection/${setting.okEnergyId}/$announcement_collection";
    var snap = await getDocSnap(path, id);
    return Announcement.fromMap(snap.data, snap.documentID);
  }

  Future<void> createAnnouncement(Announcement announcement) async {
    await request("/announcement", "POST",
        payload: announcement.toMap(), token: await getToken());
  }

  Future<void> updateAnnouncement(Announcement announcement) async {
    await request("/announcement", "PUT",
        payload: announcement.toMap(), token: await getToken());
  }

  Future<void> deleteAnnouncement(Announcement announcement) async {
    await request("/announcement", "DELETE",
        payload: announcement.toMap(), token: await getToken());
  }
}