// Lab Test 2 - v4 (for L4)

// In this lab, you are given an application program, t3-4.cpp.  You must supply files 
// "Inventory.h" and "Inventory.cpp" that this program uses.  You need only include the 
// member methods used in this program.  The comments in the application program explain 
// the behaviour of the class you are writing.  You are strongly encouraged to make additions 
// to t3-4.cpp to ensure that your class works properly in all circumstances, including 
// throwing exceptions as advertized.

// You must call your files "Inventory.h" and "Inventory.cpp" and submit both as assignment 
// #8 using the submit program provided.

// Hints: 
// 1. Be sure to use the "const" keyword where appropriate.
// 2. Date.h and Date.cpp (that you used in lab test #2) are provided so that you can 
//    ensure that you use the proper syntax in setting up your class.  (Do not include the 
//    Date class your class!)
// 3. It is not necessary to create any arrays in this class.  (You may do so if you choose, 
//    but as the most efficient implementation does not require arrays, you will not get 
//    full marks if you use arrays.)

#include "stdstuff.h"
#include "Inventory.h"

void realMain () {

   // Create three items.  part1 is "hammer".  There are currently 25 "hammer"s in
   // the warehouse.  part2 is "nail".  There are currently 1050 in the warehouse.
   // part3 is "hook".  There are currently no hooks in the warehouse.
   // If the quantity on hand (here 25 and 1050) is negative an invalid_argument
   // exception is thrown.  
   Inventory part1("hammer", 25), part2("nail", 1050), part3("hook");  

   // Parts are sold to customers and this shows the number sold.  In this case, 8
   // hammers and 425 nails have been sold.
   // If the quantity sold is negative or will cause the number of items left in the
   // inventory to become negative an invalid_argument exception is thrown.
   part1.sell(8); // 8 hammers have been sold, so there are now 17 left
   part2.sell(425); // 425 nails have been sold, so there are now 625 left

   // If there are less than the number of items specified remaining in the inventory, 
   // new stock is ordered and added to the inventory.  The stock is always increased
   // by 20 items.
   // (If there are the given number or more items remaining in the inventory, 
   // nothing happens.)
   // If the number of items specfied is negative, an invalid_argument exception is thrown.
   // The number of items ordered and added to the inventory is explained above.
   part1.stockUp(20); // as there are 17 hammers left, 20 are added to the inventory.
   part2.stockUp(500); // as there are 625 nails remaining, none are ordered.
   part3.stockUp(10); // as there are no hooks, 20 are added to the inventory.

   // This gives the current number of items on hand.  This will print 37, 625 and 20.
   cout << "Number of part1s in inventory is: " << part1.getStock() << ".\n";
   cout << "Number of part2s in inventory is: " << part2.getStock() << ".\n";
   cout << "Number of part3s in inventory is: " << part3.getStock() << ".\n\n";

   // This gives the names of the items.  It should print "hammer", 
   // "nail" and "hook".
   cout << "part1 is " << part1.getItem() << ".\n";
   cout << "part2 is " << part2.getItem() << ".\n";
   cout << "part3 is " << part3.getItem() << ".\n\n";  

   // Now 25 more hammers and 10 hooks have been sold.
   // If the quantity sold is negative or will cause the number of items left in the
   // inventory to become negative an invalid_argument exception is thrown.
   part1.sell(25); // 25 hammers have been sold
   part3.sell(10); // 10 hooks have been sold                 

   // This gives the total number of items sold to date.  This should print 33, 425 and 10.
   cout << part1.totalSold() << " part1s have been sold.\n";
   cout << part2.totalSold() << " part2s have been sold.\n";
   cout << part3.totalSold() << " part3s have been sold.\n\n";

   // This prints the lowest number of items in the inventory to date.  This should print
   // 12, 625 and 0.
   cout << "The minimum number of part1 in the inventory to date is: ";
   part1.printMinInventory();
   cout << ".\nThe minimum number of part2 in the inventory to date is: ";
   part2.printMinInventory();
   cout << ".\nThe minimum number of part3 in the inventory to date is: ";
   part3.printMinInventory();
   cout << ".\n\n"; 
   
}

int main () {

  try {

    realMain ();

  }
  catch (exception &e) { // catches all uncaught exceptions

    cout << "\nException <" << e.what() << "> occurred.\n";

  }

  pause ();
  return 0;

}