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/rate.dart';

import 'package.dart';
import 'receipt.dart';

class Invoice {
  String id;
  String invoiceNumber;
  DateTime invoiceDate;
  String customerName;
  String customerPhoneNumber;
  double amount;
  String status;
  String paymentAttachment;
  double handlingFee;
  double deliveryFee;
  double paidAmount;

  List<Package> packages;
  List<Receipt> receipts;
  List<String> receiptPhotos;
  List<CustomDuty> customDuties;
  List<Carton> cartons;
  Discount discount;

  List<CargoType> getCargoTypes(Rate rate) {
    List<CargoType> cargoTypes = [];
    double actualWeight = 0;
    double shipmentWeight = 0;
    cartons.forEach((c) {
      c.cargoTypes.forEach((tc) {
        if (cargoTypes.contains(tc)) {
          CargoType existing = cargoTypes.firstWhere((wc) => wc.id == tc.id);
          existing.weight += tc.weight;
        } else {
          cargoTypes.add(tc.clone());
        }
        actualWeight += tc.weight;
      });
      double volume = (c.length ?? 0) * (c.width ?? 0) * (c.height ?? 0);
      double sw = volume / rate.volumetricRatio ?? 0;
      shipmentWeight += sw;
    });

    DiscountByWeight discountByWeight = rate.getDiscountByWeight(
        shipmentWeight > actualWeight ? shipmentWeight : actualWeight);

    cargoTypes.forEach((e) {
      print(actualWeight > shipmentWeight);
      double cargoWeight = actualWeight > shipmentWeight
          ? e.weight
          : e.weight / actualWeight * shipmentWeight;
      double r =
          e.rate - (discountByWeight != null ? discountByWeight.discount : 0);
      double amount = cargoWeight * r;
      e.calRate = r;
      e.calWeight = cargoWeight;
      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 getTotalBalance(Rate rate) {
    return getNetAmount(rate) - (paidAmount ?? 0);
  }

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

  double getHandlingFee() {
    return handlingFee == null ? 0 : handlingFee;
  }

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

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

  Invoice(
      {this.id,
      this.invoiceNumber,
      this.invoiceDate,
      this.customerName,
      this.customerPhoneNumber,
      this.amount,
      this.discount,
      this.status,
      this.paymentAttachment,
      this.packages,
      this.receiptPhotos,
      this.customDuties,
      this.cartons,
      this.handlingFee,
      this.receipts});

  double get getAmount => packages.fold(0, (p, e) => (e.rate * e.weight) + p);

  factory Invoice.fromMap(Map<String, dynamic> map, String docID) {
    return Invoice(
      id: docID,
      invoiceNumber: map['invoice_number'],
      invoiceDate: map['invoice_date'],
      customerName: map['customer_name'],
      customerPhoneNumber: map['phone_number'],
      amount: map['amount'],
      status: map['status'],
      discount: map['discount'],
      paymentAttachment: map['payment_attachment'],
      packages: map['packages'],
      receiptPhotos: map['receiptPhotos'],
      receipts: map['receipts'],
    );
  }
}