/*****************************************************************************
 ***   FILE: array_list.cpp
 ***   DATE: 04/09/2004
 *** AUTHOR: Daniel Dementiev
 ***   GOAL: This short example shows how to deal with ArrayList object from
 ***         System::Collections namespace.
 ***         To build the project run:
 ***           ...> cl array_list.cpp /clr
 *****************************************************************************/
#using <mscorlib.dll>

using namespace System;
using namespace System::Collections;


__gc class BattleObject {
   private:
      static int nextID = 1;
      unsigned int priority;
      unsigned int objID;
   protected:
      static DateTime dtm;
      static Random *rnd = new Random( (int)dtm.Now.Ticks );
      int rand(int max) { return rnd->Next(max)+1; };
   public:
      BattleObject() : objID(nextID++), priority(rand(100)) {};
      __property unsigned int get_ID() { return objID; };
      __property unsigned int get_Priority() { return priority; };
      // operators
      static bool op_LessThan(const BattleObject &left, const BattleObject &right)
      {
         return left.priority < right.priority;
      }
      static bool op_GreaterThan(const BattleObject &left, const BattleObject &right)
      {
         return left.priority > right.priority;
      }
};

// structure for comparing BattleObject elements
__gc struct BOComparer : IComparer {
   int Compare(Object *a, Object *b)
   {
      BattleObject *left  = dynamic_cast<BattleObject*>(a);
      BattleObject *right = dynamic_cast<BattleObject*>(b);
      return -(left->Priority - right->Priority);
   }
};


void main()
{
   int i;
   ArrayList *al = new ArrayList();
   IEnumerator *item;
   BattleObject *robot;

   for(i=0;i<10;i++)
      al->Add( new BattleObject() );

   Console::WriteLine(S"Initial array:");
   item = al->GetEnumerator();
   while( item->MoveNext() ){
      robot = dynamic_cast<BattleObject*>(item->Current);
      Console::WriteLine(S"Robot: ID({0}) PR({1})", robot->ID.ToString(), robot->Priority.ToString());
   }
   Console::WriteLine(S"--------------");

   al->Sort( new BOComparer() );
   Console::WriteLine(S"Sorted array:");
   item = al->GetEnumerator();
   while( item->MoveNext() ){
      robot = dynamic_cast<BattleObject*>(item->Current);
      Console::WriteLine(S"Robot: ID({0}) PR({1})", robot->ID.ToString(), robot->Priority.ToString());
   }
   Console::WriteLine(S"--------------");

   Console::WriteLine(S"After removing two elements array:");
   al->RemoveAt(5);
   //int ind = al->IndexOf(robot);
   al->Remove(robot);
   item = al->GetEnumerator();
   while( item->MoveNext() ){
      robot = dynamic_cast<BattleObject*>(item->Current);
      Console::WriteLine(S"Robot: ID({0}) PR({1})", robot->ID.ToString(), robot->Priority.ToString());
   }
   Console::WriteLine(S"--------------");

   Console::WriteLine(S"Final array accessed through properties 'Count' and 'Item[]':");
   for(i=0;i<al->Count;i++){
      robot = dynamic_cast<BattleObject*>(al->Item[i]);
      Console::WriteLine(S"Robot: ID({0}) PR({1})", robot->ID.ToString(), robot->Priority.ToString());
   }
}