/*
Inventory
Shane Soult
3B
Programmed to add, remove, show, and list inventory
Input: command, part number Output: inventory, part number
*/

// MENU.CPP
//
// This program illustrates the use of simple one-character
//   commands.  The program displays a menu, accepts a command
//   and executes it.  The application is an embryonic
//   "Inventory Control System" which, at this stage of development,
//   only maintains a list of "inventory items" (integers).
//   Items are stored in an integer array. The "quantity" is
//   not supported -- it is set to 1 for all inventory items.
//
// Author: Bill Wares
//

#include <iostream.h>
#include <fstream.h>
#include <iomanip.h>
#include <ctype.h>                 // Declares toupper(ch)
#include <apstring.h>
#include "apvector.h"


struct Parts{						//Defines Structs
	
	int partNum;
	apstring descrip;
	int quanity;

};

// Function prototypes:

int Find (const apvector<Parts> &inventory, int partNum);
void Show (const apvector<Parts> &inventory, int partNum);
void Add (apvector<Parts> &inventory, int partNum);
void Remove (apvector<Parts> &inventory, int partNum);
void List (const apvector<Parts> &inventory);

//****************************************************************
//****************             main            *******************
//****************************************************************

int main()

{
    ifstream inFile("parts.dat");
	
	apvector<Parts> inventory(20);   // Array of items (initially empty)
    
	char cmd;
    int i=0, partNum;

	inFile>>inventory[i].partNum;

	while (inFile)
	{
		inFile.ignore (200, '\n');
		getline(inFile, inventory[i].descrip);
		inFile>>inventory[i].quanity;
		i++;
		inFile>>inventory[i].partNum;
	}

	inventory.resize(i);
	
	cout << "\n      More Than One  Of Each, Inc.\n";
    cout << "      Inventory Control System\n";

    for(;;) 
	{  // Repeat (until break)

        // Show the menu and prompt:

        cout << "\n";  // Output a blank line

        cout << "\t (S)how inventory item\n";      // '\t' is tab
        cout << "\t (A)dd item\n";
        cout << "\t (R)emove item\n";
        cout << "\t (L)ist inventory\n";
        cout << "\t (Q)uit\n";
        cout << endl;
        cout << "Next command ==> ";

        // Accept command:

        cin >> cmd;             // Read one char.
        cin.ignore(80, '\n');   // Skip remaining input (up to 80
                                //   chars) to the end of the line.
        cmd = toupper(cmd);     // Convert letter to upper case
                                //   to allow lower case input
                                //   for commands (for convenience).

        // Quit if 'Q'

        if (cmd == 'Q')
            break;                  // Quit processing commands

        cout << "\n\n****************************************\n";

        // Process command:

        switch (cmd) 
		{

          case 'S':           // Show inventory item information

            cout << "Part number: ";
            cin >> partNum;
            Show(inventory, partNum);
            break;

          case 'R':			// Removes invenotry item information

			  cout<<"Part number: ";
			  cin>>partNum;
			  Remove (inventory, partNum);
			  break;

		  case 'A':			// Adds inventory item information

			  Add (inventory, partNum);
			  break;

		  case 'L':

			  List (inventory);		// lists all inventory items
			  break;
			  
        }
	inFile.close();

        cout << "****************************************\n";
    }



    return 0;
}

//****************************************************************
//****************          Functions          *******************
//****************************************************************

int Find (const apvector<Parts> &inventory, int partNum)

// Finds the part number, partNum, in the inventory array.
// Returns its index if found, -1 otherwise.

{
    int i, nItems = inventory.length();

    for (i = 0;   i < nItems;   i++)
        if (inventory[i].partNum == partNum)
            return i;
    return -1;
}

//****************************************************************

void Show (const apvector<Parts> &inventory, int partNum)

// Displays inventory information for the given part number.

{
    int nItems, i=Find(inventory, partNum);
	
	if (i<0)
		cout<<"Sorry, This part is not in the inventory. It will be back ordered. "<<endl;
	else
	{
		nItems = inventory.length();
		cout<<"There are/is "<<inventory[i].quanity<<" of Part number "<<partNum<<" -- "<<inventory[i].descrip<<"."<<endl;
	}



}

//****************************************************************

void Add (apvector<Parts> &inventory, int partNum)

// Adds the new inventory item with the specified part number,
//   partNum, to the inventory list.
//   Checks whether partNum is already in the list.

{
    int nItems, quanity;
	char ans;

 	cout<<"Would you like to add a part or a quantity?"<<endl;
	cin>>ans;
	
	if((ans=='p') || (ans=='P'))
	{
        nItems = inventory.length();
        inventory.resize(nItems+1);
        inventory[nItems].partNum = partNum;
		
		cout<<"Please enter the part description:  "<<endl;
		cin.ignore(200, '\n');
		getline(cin, inventory[nItems].descrip);
		
		cout<<"Please enter the part number:  "<<endl;
		cin>>inventory[nItems].partNum;

		cout<<"Please enter the quantity you would like to add:  "<<endl;
		cin>>inventory[nItems].quanity;

		cout<<inventory[nItems].descrip<<" is now added to the list."<<endl;
	}
	else if((ans=='q') || (ans=='Q'))
	{	
		cout<<"Please enter the part number:  "<<endl;
		cin>>partNum;

		cout<<"Please enter the quantity you would like to add:  "<<endl;
		cin>>quanity;

		inventory[Find(inventory, partNum)].quanity+=quanity;
		cout << "added to the inventory list.\n";
	}
	else
	{
		cout<<"Please enter P or Q. "<<endl;
		Add(inventory, partNum);
	}

	
}


//****************************************************************

void Remove (apvector<Parts> &inventory, int partNum)

// Removes the item partNum from the inventory list, if it
//   is there.  Displays an appropriate message if partNum is not
//   in the list.

{
    int i, j, nItems, quanity;
	char ans;

	cout<<"Would you like to remove the item from the list? "<<endl;
	cin>>ans;

	if (ans=='y' || ans=='Y')
	{
		i = Find(inventory, partNum);
		if (i < 0)
			cout << "not found.\n";
		else 
		{
			nItems = inventory.length();
			
			for (j = i+1;   j < nItems;   j++)  // Shift items
				inventory[j-1] = inventory[j];  //  to fill the gap.
			inventory.resize(nItems - 1);
			cout << "removed from the inventory list.\n";
		}
	}
	else if(ans=='n' || ans=='N')
	{

		cout<<"Please enter the quantity you would like to remove:  "<<endl;
		cin>>quanity;

		inventory[Find(inventory, partNum)].quanity-=quanity;

		if(inventory[Find(inventory, partNum)].quanity<0)
			cout<<"This order has been back ordered."<<endl;
		else
			cout << "removed to the inventory list.\n";

}
}
//****************************************************************

void List (const apvector<Parts> &inventory)

// Displays the inventory list.

{
    int nItems, j;
		
	nItems = inventory.length();
	j=0;
	
	cout<<"Part Number  Decsription    Quanity"<<endl;

	for (j=0; j<nItems; j++)
	{
		
		cout<<setw(2)<<inventory[j].partNum<<setw(23)<<inventory[j].descrip<<setw(9)<<inventory[j].quanity<<endl;
	}
	
	
	cout<<endl;		
}

/*

      More Than One  Of Each, Inc.
      Inventory Control System

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> l


****************************************
Part Number  Decsription    Quanity
 1                    CPU       50
 2           Memory Chips      150
 3          Mother Boards       10
 4      10 GB Hard Drives       10
 5      20 GB Hard Drives       10
 6            Sound Cards        5
 7      40x CD-Rom Drives        5
 8         12x DVD Drives        5
 9        15 inch Monitor        2
10        17 inch Monitor        1

****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> a


****************************************
Would you like to add a part or a quantity?
q
Please enter the part number:
1
Please enter the quantity you would like to add:
10
added to the inventory list.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> a


****************************************
Would you like to add a part or a quantity?
q
Please enter the part number:
2
Please enter the quantity you would like to add:
25
added to the inventory list.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> a


****************************************
Would you like to add a part or a quantity?
p
Please enter the part description:
8x8x32 CDRW
Please enter the part number:
11
Please enter the quantity you would like to add:
2
8x8x32 CDRW is now added to the list.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> a


****************************************
Would you like to add a part or a quantity?
p
Please enter the part description:
40 GB Hard Drive
Please enter the part number:
12
Please enter the quantity you would like to add:
2
40 GB Hard Drive is now added to the list.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> r


****************************************
Part number: 11
Would you like to remove the item from the list?
n
Please enter the quantity you would like to remove:
5
removed to the inventory list.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

****************************************
Part number: 11
Would you like to remove the item from the list?
n
Please enter the quantity you would like to remove:
5
This order has been back ordered.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

****************************************
Part number: 12
Would you like to remove the item from the list?
n
Please enter the quantity you would like to remove:
5
This order has been back ordered.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> r


****************************************
Part number: 4
Would you like to remove the item from the list?
n
Please enter the quantity you would like to remove:
5
removed to the inventory list.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> r


****************************************
Part number: 9
Would you like to remove the item from the list?
n
Please enter the quantity you would like to remove:
2
removed to the inventory list.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> a


****************************************
Would you like to add a part or a quantity?
q
Please enter the part number:
3
Please enter the quantity you would like to add:
8
added to the inventory list.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> a


****************************************
Would you like to add a part or a quantity?
q
Please enter the part number:
4
Please enter the quantity you would like to add:
5
added to the inventory list.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> r

  

****************************************
Would you like to add a part or a quantity?
6
Please enter P or Q.
Would you like to add a part or a quantity?
a
Please enter P or Q.
Would you like to add a part or a quantity?
q
Please enter the part number:
6
Please enter the quantity you would like to add:
10
added to the inventory list.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> a


****************************************
Would you like to add a part or a quantity?
q
Please enter the part number:
10
Please enter the quantity you would like to add:
2
added to the inventory list.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> r


****************************************
Part number: 25
Would you like to remove the item from the list?
n
Please enter the quantity you would like to remove:
10
removed to the inventory list.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==>


          (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> r


****************************************
Part number: 10
Would you like to remove the item from the list?
n
Please enter the quantity you would like to remove:
5
removed to the inventory list.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> r


****************************************
Part number: 3
Would you like to remove the item from the list?
n
Please enter the quantity you would like to remove:
5
removed to the inventory list.
****************************************

         (S)how inventory item
         (A)dd item
         (R)emove item
         (L)ist inventory
         (Q)uit

Next command ==> q
Press                                                                                  any key to continue

End Result:
****************************************
Part Number  Decsription    Quanity
 1                    CPU       40
 2           Memory Chips      125
 3          Mother Boards        7
 4      10 GB Hard Drives       10
 5      20 GB Hard Drives       10
 6            Sound Cards       -5
 7      40x CD-Rom Drives        5
 8         12x DVD Drives        5
 9        15 inch Monitor        4
10        17 inch Monitor        4
11           8x8x32 CD-RW        7
12       40 GB Hard Drive        7
25                Web Cam       10
****************************************

*/