using System;
using System.Collections.Generic;

class MainClass
{
  enum CTypeA {Classic=0, Silver=1, Gold=2, Platinum=3}
  enum BrandA {Apple=0, Asus=1, Acer=2, Samsung=3}
  enum ModelA {A1=0, A2=1, B1=2, B2=3, C1=4, C2=5}
  enum AttributeA {Hot=0, Cold=1, Mild=2}

  public static void Main (string[] args)
  {
    //  一個可存放 10個Customer物件的 List（串列）
    List<Customer>  Cust = new List<Customer>();
    //  一個可存放5個Computer物件的 List（串列）
    List<Computer> Comp = new List<Computer>();
    //  一個可存放5個Food物件的 List（串列）
    List<Food> Foob = new List<Food>();
    //應付金額輸出
    List<double>  print4 = new List<double>();
    // 亂數
    Random w = new Random();
    // 產生10個Custome 物件的內容
    for(int i=0; i<10; i++)
    {
      Customer oneCust = new Customer();
      //SSN的值
      oneCust.SSN = SetSSN("C");
      //Cname的值
      oneCust.Cname =  GetCust(i);
      //CType的值
      int b = w.Next(0,4);
      CTypeA  bb = (CTypeA) b;
      oneCust.CType = bb.ToString();
      //Discount的值
      double inDiscount = w.Next(1, 10)*0.1;
      oneCust.SetDiscount(inDiscount);
      //丟到Cust裡
      Cust.Add(oneCust);

      // 產生個5個Computer和Food物件的內容
      Computer oneComp = new Computer();
      Food oneFoob = new Food();
      //Pid值
      oneComp.Pid = "Comp0"+(i+1);
      oneFoob.Pid = "Food0"+(i-4);
      //Price值
      oneComp.Price = w.Next(10,99)*1000;
      oneFoob.Price = w.Next(10,99)*10;
      //Brand的值
      int c = w.Next(0,4);
      BrandA  cc = (BrandA) c;
      oneComp.Brand = cc.ToString();
      //Model的值
      int d = w.Next(0,6);
      ModelA  dd = (ModelA) d;
      oneComp.Model = dd.ToString();
      //Attribute的值
      int e = w.Next(0,3);
      AttributeA  ee = (AttributeA) e;
      oneFoob.Attribute = ee.ToString();
      //Deadline的值
      oneFoob.Deadline=""+RandomDay();
      if(i<5)
      {
      Comp.Add(oneComp);
      print4.Add(oneCust.GetDiscount()*oneComp.Price);
      }
      else
      {
      Foob.Add(oneFoob);
      print4.Add(oneCust.GetDiscount()*oneFoob.Price);
      }
      }
      List<string>  print1 = new List<string>();
      List<string>  print2 = new List<string>();
      List<string>  print3 = new List<string>();
     Console.WriteLine("所有 Customer 的屬性和購買資料： ..........\n");
    // 輸出10個Custome 物件
    foreach(var i in Cust)
      {
        print1.Add("客戶： "+i.SSN + "," + i.Cname + "," + i.CType + "," + i.GetDiscount());
      }
    foreach(var i in Comp)
      {
        print2.Add("資訊設備： "+i.Pid + "," + i.Price + "," + i.Brand + "," + i.Model);
      }
    foreach(var i in Foob)
      {
        print3.Add("食物： "+i.Pid + "," + i.Price + "," + i.Attribute + ","+ i.Deadline);
      }
      //輸出
    for(int i=0;i<10;i++)
    {
       Console.WriteLine(print1[i]);
       if(i<5)
       {
         Console.WriteLine(print2[i]);
       }
       else
       {
         int j=i-5;
         Console.WriteLine(print3[j]);
       }
       Console.WriteLine("應付金額："+print4[i]+"\n");
    }

  }
  //設SSN的值「C」開頭，再加上6位的數字。而且，這6個數字的奇位數字總和與偶位數字總和的差必須被10整除。
  public static string SetSSN(string c)
  {
    Random w = new Random();
    string math=""+w.Next(10000,100000);
    int sum=0;
    for(int i =0;i<math.Length;i++)
    {
      sum=i%2==0?sum+Int32.Parse(math.Substring(i,1)):sum-Int32.Parse(math.Substring(i,1));
    }
    sum=sum>0?sum:sum*-1;
    c=c+math+sum;
    return c;
  }
//Customer物件的Cname，依序是Cust01、Cust02~
public static string GetCust(int a)
  {
    string Beats = " ";
    if(a>=0 && a<=8){
      int A = a+1;
       Beats = "Cust0" + A.ToString();
    }
    else{
      Beats = "Cust10";
    }
    return Beats;
  }
//Pid，依序是Comp01、Comp02、、、Comp05
public static string GetPid(int a)
  {
    string Beats = " ";
    Beats = "Comp0" + a;
    return Beats;
  }
  //Deadline的值，隨機產生一個日期（從1995/1/1至今天）
  public static string RandomDay()
  {
    Random gen = new Random();
    DateTime start = Convert.ToDateTime("1995-1-1");
    int range = (DateTime.Today - start).Days;
    string myDateString =start.AddDays(gen.Next(range)).ToString("M/d/yyyy");
    return myDateString;
  }
}

// 父類別（基底類別）宣告一個Customer類別
class Customer
{
  //其中SSN、Cname和CType ，它們是public，且資料型態皆是string。另外還有一個Discount欄位/屬性，它是private，且資料型態是double。
  public string SSN  { get; set; }
  public string Cname  { get; set; }
  public string CType  { get; set; }
  private double Discount;

    public void SetDiscount(double inDiscount)
    {
      Discount = inDiscount;
    }
    public double GetDiscount()
    {
      return Discount;
    }

}
//宣告一個Product父類別
 class Product
{
  public string Pid  { get; set; }
  public int Price  { get; set; }
}
//二個它的子類別Computer和Food
class Computer : Product
{
  //分別是Brand和Model。它們是public且資料型別皆是string
  public string Brand { get; set; }
  public string Model { get; set; }
}

// 子類別（衍生類別）
class Food: Product
{
  //Attribute和Deadline，皆是public，且它們的資料型別都是string。
  public string Attribute{ get; set; }
  public string Deadline { get; set;}
}