1 /**

     2  * Invoice.cs

     3  * 

     4  * @author       Markus Bröker<broeker.markus@googlemail.com>

     5  * @copyright    Copyright(C) 2017 4Customers UG

     6  * 

     7  */

     8 using System;

     9 using System.Collections.Generic;

    10 using System.Linq;

    11 using System.Text;

    12 using System.Threading.Tasks;

    13 

    14 using static Sales.Payment;

    15 

    16 namespace Sales

    17 {

    18     delegate double InvoiceDelegate();

    19 

    20     class Invoice

    21     {

    22         private double value = 0;

    23         private PaymentType till;

    24 

    25         public Invoice(double value, PaymentType till)

    26         {

    27             this.value = value;

    28             this.till = till;

    29 

    30             InvoiceDelegate invoiceDelegateReference = this.Rabatt;

    31             invoiceDelegateReference += this.AddTax;

    32             invoiceDelegateReference += this.Skonto;

    33 

    34             invoiceDelegateReference();

    35         }

    36 

    37         public double getFinalResult()

    38         {            

    39             return value;

    40         }

    41 

    42         //Rabatt auf den Netto Preis

    43         private double Rabatt()

    44         {

    45             if (value > 1000.0)

    46             {

    47                 value *= 0.75;

    48             }

    49             else if (value > 500.0)

    50             {

    51                 value *= 0.85;

    52             }

    53 

    54             return value;

    55         }

    56 

    57         // Steuern auf den rabattierten Nettopreis

    58         private double AddTax()

    59         {

    60             value *= 1.19;

    61             return value;

    62         }

    63 

    64         // Skonto immer zum Schluss

    65         private double Skonto()

    66         {

    67             switch (till)

    68             {

    69                 case PaymentType.NOW:

    70                     value *= 0.97;

    71                     break;

    72                 case PaymentType.WEEK:

    73                     value *= 0.98;

    74                     break;

    75                 case PaymentType.MONTH:

    76                     value *= 0.99;

    77                     break;

    78             }

    79 

    80             return value;

    81         }

    82     }

    83 }