import 'dart:async';

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:fcs/domain/entities/invoice.dart';
import 'package:fcs/domain/entities/package.dart';
import 'package:fcs/domain/entities/receipt.dart';
import 'package:fcs/helpers/pagination.dart';
import 'package:fcs/pages/main/model/base_model.dart';
import 'package:logging/logging.dart';

class InvoiceModel extends BaseModel {
  final log = Logger('InvoiceModel');

  Pagination pagination;
  StreamSubscription<QuerySnapshot> listener;

  List<Invoice> invoices = [
    Invoice(
        invoiceNumber: 'A092(A)-30',
        invoiceDate: DateTime(2020, 4, 5, 12, 30),
        customerName: 'Ko Nyi',
        customerPhoneNumber: '+959 888888888',
        amount: 500,
        status: 'Pending',
        packages: [
          Package(
            shipmentNumber: "A202",
            receiverNumber: "3",
            boxNumber: "1",
            rate: 7,
            packageType: "General",
            weight: 25,
            status: "Received",
            receiverAddress: '1 Bo Yar Nyunt St.\nDagon Tsp, Yangon',
            arrivedDate: DateTime(2020, 6, 1),
          ),
          Package(
              shipmentNumber: "A202",
              receiverNumber: "3",
              boxNumber: "2",
              rate: 7,
              packageType: "General",
              weight: 20,
              status: "Received",
              arrivedDate: DateTime(2020, 6, 1),
              receiverAddress: '1 Bo Yar Nyunt St.\nDagon Tsp, Yangon'),
        ],
        receipts: [
          Receipt(amount: 200, date: DateTime(2020, 6, 1)),
          Receipt(amount: 100, date: DateTime(2020, 6, 16)),
        ]),
    Invoice(
        invoiceNumber: 'A092(A)-31',
        invoiceDate: DateTime(2020, 4, 5, 9, 30),
        customerName: 'Ko Aung Myo',
        customerPhoneNumber: '+959 444444444',
        amount: 300,
        status: 'Paid',
        packages: [
          Package(
              shipmentNumber: "A202",
              receiverNumber: "3",
              boxNumber: "3",
              rate: 7,
              packageType: "General",
              weight: 15,
              status: "Received",
              arrivedDate: DateTime(2020, 6, 1),
              receiverAddress: '1 Bo Yar Nyunt St.\nDagon Tsp, Yangon'),
          Package(
              shipmentNumber: "A202",
              receiverNumber: "2",
              boxNumber: "1",
              rate: 8,
              packageType: "Medicine",
              weight: 15,
              status: "Processing",
              arrivedDate: DateTime(2020, 6, 1),
              receiverAddress: '2 Shwe Taung Kyar St, Bahan Tsp, Yangon'),
        ],
        receipts: [
          Receipt(amount: 200, date: DateTime(2020, 6, 1)),
        ]),
    Invoice(
        invoiceNumber: 'A092(A)-32',
        invoiceDate: DateTime(2020, 4, 6, 10, 10),
        customerName: 'Ko Zaw Thu',
        customerPhoneNumber: '+959 777777777',
        amount: 200,
        status: 'Paid',
        packages: [
          Package(
              shipmentNumber: "A202",
              receiverNumber: "2",
              boxNumber: "2",
              rate: 7,
              packageType: "General",
              weight: 55,
              status: "Ready to ship",
              arrivedDate: DateTime(2020, 6, 1),
              receiverAddress: '2 Shwe Taung Kyar St, Bahan Tsp, Yangon'),
          Package(
              shipmentNumber: "A201",
              receiverNumber: "1",
              boxNumber: "1",
              rate: 9,
              packageType: "Dangerous",
              weight: 25,
              status: "Delivered",
              arrivedDate: DateTime(2020, 5, 21),
              receiverAddress: '3 Kambzwza St, Bahan Tsp, Yangon'),
        ],
        receipts: [
          Receipt(amount: 200, date: DateTime(2020, 6, 1)),
        ]),
    Invoice(
        invoiceNumber: 'A092(A)-33',
        invoiceDate: DateTime(2020, 4, 6, 12, 15),
        customerName: 'Ko Myo Min',
        customerPhoneNumber: '+959 555555555',
        amount: 300,
        status: 'Pending',
        receipts: [
          Receipt(amount: 200, date: DateTime(2020, 6, 1)),
        ],
        packages: [
          Package(
              shipmentNumber: "A201",
              receiverNumber: "1",
              boxNumber: "1",
              rate: 9,
              packageType: "Dangerous",
              weight: 25,
              status: "Delivered",
              arrivedDate: DateTime(2020, 5, 21),
              receiverAddress: '3 Kambzwza St, Bahan Tsp, Yangon'),
          Package(
              shipmentNumber: "A201",
              receiverNumber: "1",
              boxNumber: "2",
              rate: 7,
              packageType: "General",
              weight: 5,
              status: "Delivered",
              arrivedDate: DateTime(2020, 5, 21),
              receiverAddress: '3 Kambzwza St, Bahan Tsp, Yangon'),
        ])
  ];

  List<Invoice> paidInvoices = [];

  bool endOfPaidInvoices = false;
  bool isLoading = false;

  @override
  void privilegeChanged() {
    super.privilegeChanged();
    // _loadInvoices();
  }

  Future<void> _loadInvoices() async {
    if (user == null || !user.hasInvoices()) return;
    String path = "/$invoices/";
    if (listener != null) listener.cancel();
    invoices = [];
    try {
      listener = Firestore.instance
          .collection("$path")
          .snapshots()
          .listen((QuerySnapshot snapshot) {
        invoices.clear();
        invoices = snapshot.documents.map((documentSnapshot) {
          var s = Invoice.fromMap(
              documentSnapshot.data, documentSnapshot.documentID);
          return s;
        }).toList();
        notifyListeners();
      });
    } catch (e) {
      log.warning("Error!! $e");
    }
  }

  Future<void> initPaidInvoice(bool onlyFcs) {
    if (onlyFcs) {
      if (user == null ||
          !((user.hasPackages() ||
              user.hasReceiving() ||
              user.hasProcessing()))) return null;
    }
    if (pagination != null) pagination.close();
    paidInvoices = [];
    endOfPaidInvoices = false;
    isLoading = false;

    var pageQuery = Firestore.instance
        .collection("/$invoices");
        // .collection(
        //     "/users/8OTfsbVvsUOn1SLxy1OrKk7Y_yNKkVoGalPcIlcHnAY/messages")
        // .orderBy("date", descending: true);
        // .where("is_delivered", isEqualTo: true)
        // .where("is_deleted", isEqualTo: false);
    if (!onlyFcs) {
      pageQuery = pageQuery.where("user_id", isEqualTo: user.id);
    }
    // pageQuery = pageQuery.orderBy("current_status_date", descending: true);
    pagination = new Pagination(pageQuery, rowPerLoad: 20);
    pagination.stream.listen((doc) {
      if (doc == null) {
        endOfPaidInvoices = true;
      } else {
        paidInvoices.add(Invoice.fromMap(doc.data, doc.documentID));
        // var m = Message.fromMap(doc.data, doc.documentID);
        // deliveredPackages.add(Package(
        //     id: m.id,
        //     status: package_delivered_status,
        //     currentStatus: package_delivered_status,
        //     currentStatusDate: m.date,
        //     trackingID: (count++).toString(),
        //     market: m.message));
      }
    });
    return null;
  }

  Future<bool> loadMorePaidInvoices() {
    if (pagination != null && !isLoading && !endOfPaidInvoices) {
      isLoading = true;
      notifyListeners();
      pagination.load().then((value) {
        isLoading = false;
        notifyListeners();
      });
    }
    return null;
  }

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

  @override
  logout() async {
    if (listener != null) await listener.cancel();
    invoices = [];
  }

  Future<void> create(Invoice invoice) {
    // return Services.instance.fcsShipmentService.createFcsShipment(fcsShipment);
  }

  Future<void> update(Invoice invoice) {
    // return Services.instance.fcsShipmentService.updateFcsShipment(fcsShipment);
  }
}