fcs/lib/domain/entities/invoice.dart

import 'package:fcs/domain/entities/cargo_type.dart';
import 'package:fcs/domain/entities/carton.dart';
import 'package:fcs/domain/entities/custom_duty.dart';
import 'package:fcs/domain/entities/discount.dart';
import 'package:fcs/domain/entities/discount_by_weight.dart';
import 'package:fcs/domain/entities/payment_method.dart';
import 'package:fcs/domain/entities/rate.dart';
import 'package:fcs/domain/entities/shipment.dart';

class Invoice {
  String id;
  String invoiceNumber;
  DateTime invoiceDate;
  String fcsShipmentID;
  String userID;
  String userName;
  String phoneNumber;
  String status;

  double handlingFee;
  double deliveryFee;
  double paidAmount;
  double amount;

  List<CustomDuty> customDuties;
  List<Carton> cartons;
  List<CargoType> cargoTypes;
  List<Shipment> shipments;
  Discount discount;
  PaymentMethod paymentMethod;

  List<CargoType> getCargoTypes(Rate rate) {
    List<CargoType> cargoTypes = [];
    double totalCalWeight = 0;
    cartons.forEach((carton) {
      if (carton.isChecked) {
        var _cartonsTypes =
            carton.getCargoTypeForCalWeight(rate.volumetricRatio);
        _cartonsTypes.forEach((ct) {
          if (cargoTypes.contains(ct)) {
            CargoType existing = cargoTypes.firstWhere((wc) => wc.id == ct.id);
            existing.calWeight += ct.calWeight;
          } else {
            cargoTypes.add(ct.clone());
          }
          totalCalWeight += ct.calWeight;
        });
      }
    });

    DiscountByWeight discountByWeight =
        rate.getDiscountByWeight(totalCalWeight);

    cargoTypes.forEach((e) {
      double r =
          e.rate - (discountByWeight != null ? discountByWeight.discount : 0);
      double amount = e.calWeight * r;
      e.calRate = r;
      e.amount = amount;
    });
    return cargoTypes;
  }

  double getTotal(Rate rate) {
    List<CargoType> cargoTypes = getCargoTypes(rate);
    var total = cargoTypes.fold(0.0, (p, c) => c.amount + p);
    return total;
  }

  double getNetAmount(Rate rate) {
    List<CargoType> cargoTypes = getCargoTypes(rate);
    var total = cargoTypes.fold(0.0, (p, c) => c.amount + p);
    total += getCustomFee();
    total += getDeliveryFee();
    total += getHandlingFee();
    total -= getDiscount();
    return total;
  }

  double getHandlingFee() {
    return shipments?.where((sh) => sh.isSelected)?.fold(0, (p, s) {
      return p + (s?.handlingFee ?? 0) - (s?.paidHandlingFee ?? 0);
    });
  }

  double getTotalBalance(Rate rate) {
    return getNetAmount(rate) - (paidAmount ?? 0);
  }

  double getCustomFee() {
    return customDuties == null ? 0 : customDuties.fold(0, (p, d) => p + d.fee);
  }

  double getDeliveryFee() {
    return deliveryFee == null ? 0 : deliveryFee;
  }

  double getDiscount() => discount == null ? 0 : discount.amount;

  Invoice({
    this.id,
    this.invoiceNumber,
    this.invoiceDate,
    this.userName,
    this.phoneNumber,
    this.amount,
    this.discount,
    this.status,
    this.customDuties,
    this.cartons,
    this.cargoTypes,
    this.handlingFee,
    this.fcsShipmentID,
    this.shipments,
  });

  factory Invoice.fromMap(Map<String, dynamic> map, String docID) {
    return Invoice(
      id: docID,
      invoiceNumber: map['invoice_number'],
      invoiceDate: map['invoice_date'],
      userName: map['user_name'],
      phoneNumber: map['phone_number'],
      amount: map['amount'],
      status: map['status'],
      discount: map['discount'],
    );
  }

  Map<String, dynamic> toMap() {
    List _cargoTypes = cargoTypes.map((c) => c.toMap()).toList();
    List _customDuties = customDuties?.map((c) => c.toMap())?.toList();
    List _cartons = cartons?.map((c) => c.toMap())?.toList() ?? [];
    return {
      "id": id,
      "invoice_date": invoiceDate,
      "user_id": userID,
      'fcs_shipment_id': fcsShipmentID,
      'cargo_types': _cargoTypes,
      'custom_duties': _customDuties,
      'cartons': _cartons,
      'discount': discount?.toMap(),
      'handling_fee': handlingFee,
      'delivery_fee': deliveryFee,
    };
  }
}