/*Program Description: A user can choose to create a file containing
stock information for an inventory, or read the stock information
from a file. The user can then request various data from the file via
a menu function.*/


#include "stdafx.h"
#include <iostream>
#include <sstream>
#include <string>
#include <fstream>
#include <vector>
#include <stdlib.h>

using namespace std;

double profit(int num_items, double buy_price, double sell_price, double store_fee);


class Table_item //an object of type Table_item represents one whole row in the inventory table
{

public:

	int item_ID;
	int num_items;
	double buy_price;
	double sell_price;
	double store_fee;


	Table_item(int id, int num, double buy, double sell, double store){ //constructor

		item_ID = id;
		num_items = num;
		buy_price = buy;
		sell_price = sell;
		store_fee = store;

	}

	friend	Table_item operator>>(istream &in, Table_item&  item){ //defines input stream for table items

		in >> item.item_ID >>  item.num_items >> item.buy_price >>  item.sell_price >> item.store_fee;
		return item;

	}

	friend  Table_item operator<<(ostream &out, Table_item&  item){ //defines output stream for table items

		out << item.item_ID << item.num_items << item.buy_price << item.sell_price << item.store_fee;
		return item;

	}


};


int main(){



	char option;
	char menu_choice;
	int store_num;

	vector <Table_item> inv_vect;

	cout << "Would you like to enter data by hand (H) or read it from a file (F)" << endl;
	cin >> option;

	if(option == 'H'){

		fstream inv_table("Tablefile.txt", fstream::in | fstream::out | fstream::trunc);

		cout << "Please enter the number of items you would like to store:" << endl; //capped at 100 throughout program
		cin >> store_num;

		int i = 1;

		while(i <= store_num){

			//inv_table.open();

			int id_loc;
			int num_loc;
			double buy_loc, sell_loc, fee_loc;

			cout << "Please enter the item ID for item " << i << ":";
			cin >> id_loc;
			cout << endl;

			cout << "Please enter the number of items for item " << i << ":";
			cin >> num_loc;
			cout << endl;

			cout << "Please enter the buying price for item " << i << ":" << endl;
			cin >> buy_loc;
			cout << endl;

			cout << "Please enter the selling price for item " << i << ":" << endl;
			cin >> sell_loc;
			cout << endl;

			cout << "Please enter the storage fee for item " << i << ":" << endl;
			cin >> fee_loc;
			cout << endl;

			Table_item item(id_loc, num_loc, buy_loc, sell_loc, fee_loc);

			inv_table << item;
			inv_table << endl;
			//inv_table.flush();

			inv_vect.push_back(item);

			i++;

		}//end while for writing inventory file

		//inv_table.close();

		cout << inv_table;
		cout << endl;
		cout << inv_vect[0];
		cout << endl;


		cout << "Menu | Please choose one of the following options: \n" ;
		cout << "Option a: Print stock information. \n";
		cout << "Option b: Print general information. \n";
		cout << "Option c: Print all the items in a table. \n";
		cout << "Option d: Edit an item’s information, store in a file. \n"; //options d, e in the syllabus have been merged into a single block
		cout << "Option e: Exit. \n";

		cin >> menu_choice;

		if (menu_choice == 'a'){

			cout<< "Stock Information: \n";

			for(int i=1; i<5; i++){

				double profit_indexed;

				profit_indexed = profit(inv_vect[i].num_items, inv_vect[i].sell_price, inv_vect[i].buy_price, inv_vect[i].store_fee);

				cout << "Item" << i << endl;

				cout<<"* Item ID:"<< inv_vect[i].item_ID << endl;
				cout<< "* Number of items:"<< inv_vect[i].num_items << endl;
				cout<< "* Buying price: "<< inv_vect[i].buy_price << endl;
				cout<< "* Selling price"<< inv_vect[i].sell_price << endl;
				cout<< "* Storage fees:"<< inv_vect[i].store_fee << endl;
				cout << "* Profit:" << profit_indexed << endl;
			}
		}


		if(menu_choice == 'b'){

			int total_items = 0;
			double profit_total = 0;
			double buying_total = 0, selling_total = 0;

			for (int i=1; i<5; i++){

				total_items += inv_vect[i].num_items;
			}

			cout << "Total number of items: " << total_items << endl;

			for ( int i=1; i<5; i++){

				double profit_total_indexed;

				profit_total_indexed = profit(inv_vect[i].num_items, inv_vect[i].sell_price, inv_vect[i].buy_price, inv_vect[i].store_fee);

				profit_total += profit_total_indexed;
			}

			cout << "Total Profit:" << profit_total << endl;
			cout << "Average Profit:" << (profit_total)/4 << endl;


			for ( int i=1; i<5; i++){

				buying_total +=  inv_vect[i].buy_price;

				selling_total += inv_vect[i].sell_price;
			}

			cout << "Buying price average:" << (buying_total)/4 << endl;
			cout << "Selling price average:" << (selling_total)/4 << endl;

		}






		if(menu_choice == 'c') //Print all inventory items in a table
		{

			int k=0;

			while(k<100){

				cout << inv_vect[k]; //automatically tabular; see definition of << operator for objects of type Table_item
				cout << endl;
				k++;
			}

		}


		if(menu_choice == 'd') //Edit an item from user input, given an item's ID number
		{

			int edit_id;

			cout << "Please enter the ID of the item you wish to edit" << endl;
			cin >> edit_id;

			int k=0;

			while(inv_vect[k].item_ID != edit_id){ //traversing array for item with ID edit_id, for loop

				k++;
			}

			int new_id, new_num;
			double new_buyp, new_sellp, new_storef;

			cout << "The current item information is:" << endl;
			cout << inv_vect[k]; //k+1 used since above while loop exits before incrementing k

			cout << "Enter a new item ID: ";
			cin >> new_id;
			cout << endl;

			cout << "Enter a new number of items: ";
			cin >> new_num;
			cout << endl;

			cout << "Enter a new buying price: ";
			cin >> new_buyp;
			cout << endl;

			cout << "Enter a new selling price: ";
			cin >> new_sellp;
			cout << endl;

			cout << "Enter a new storage fee: ";
			cin >> new_storef;
			cout << endl;

			Table_item item(new_id, new_num, new_buyp, new_sellp, new_storef);

			inv_vect.push_back(item);

			char response;

			cout << "Item successfully edited. Would you like to store updated item in a file? (Y/N)" << endl;

			if(response == 'Y')
			{
				int h=0;

				while(h<100){

					inv_table << inv_vect[h];
					h++;
				}



			}



			if(response == 'N'){

				cout << "Okay then." << endl;
			}

		}


		if(menu_choice == 'e') //Closes the program and exits
		{

			char a;
			cout << "Enter any char to exit." << endl;
			cin >> a;

		} //exit


	}//end if block for option H (entering by hand)




	if (option == 'F'){

		fstream inv_table;

		string file_location;

		cout << "Please enter the location of your file (full path):";
		getline(cin, file_location);

		inv_table.open(file_location.c_str());

		/*ifstream inv_file_i;
		ofstream inv_file_o;*/

		if(inv_table.fail()){

			cout << "Input file failed to open.\n";
			exit(1);

		}

		inv_table.open("Tablefile.txt");

		int k=0;
		int j=0, n=0;
		double b=0, s=0, f=0; //dummy parameters for constructor; needed to read from file into array

		Table_item item(j, n, b, s, f);

		vector <Table_item> inv_vect;

		while(k < 100){//building array from file


			inv_table >> item;

			item = inv_vect[k];

			k++;


		}

		cout << "Menu | Please choose one of the following options: \n" ;
		cout << "Option a: Print stock information. \n";
		cout << "Option b: Print general information. \n";
		cout << "Option c: Print all the items in a table. \n";
		cout << "Option d: Edit an item’s information, store in a file. \n"; //options d, e in the syllabus have been merged into a single block
		cout << "Option e: Exit. \n";

		cin >> menu_choice;

		if (menu_choice == 'a')
		{
			cout<< "Stock Information: \n";

			for(int i=1; i<5; i++)
			{
				double profit_indexed;

				profit_indexed = profit(inv_vect[i].num_items, inv_vect[i].sell_price, inv_vect[i].buy_price, inv_vect[i].store_fee);

				cout << "Item" << i << endl;

				cout<<"* Item ID:"<< inv_vect[i].item_ID << endl;
				cout<< "* Number of items:"<< inv_vect[i].num_items << endl;
				cout<< "* Buying price: "<< inv_vect[i].buy_price << endl;
				cout<< "* Selling price"<< inv_vect[i].sell_price << endl;
				cout<< "* Storage fees:"<< inv_vect[i].store_fee << endl;
				cout << "* Profit:" << profit_indexed << endl;
			}
		}


		if(menu_choice == 'b')
		{

			int total_items = 0;
			double profit_total = 0;
			double buying_total = 0, selling_total = 0;

			for (int i=1; i<5; i++)
			{

				total_items += inv_vect[i].num_items;
			}

			cout << "Total number of items: " << total_items << endl;

			for ( int i=1; i<5; i++)
			{
				double profit_total_indexed;

				profit_total_indexed = profit(inv_vect[i].num_items, inv_vect[i].sell_price, inv_vect[i].buy_price, inv_vect[i].store_fee);

				profit_total += profit_total_indexed;
			}

			cout << "Total Profit:" << profit_total << endl;
			cout << "Average Profit:" << (profit_total)/4 << endl;


			for ( int i=1; i<5; i++)
			{
				buying_total +=  inv_vect[i].buy_price;

				selling_total += inv_vect[i].sell_price;
			}

			cout << "Buying price average:" << (buying_total)/4 << endl;
			cout << "Selling price average:" << (selling_total)/4 << endl;

		}






		if(menu_choice == 'c') //Print all inventory items in a table
		{

			int k=0;

			while(k<100){

				cout << inv_vect[k]; //automatically tabular; see definition of << operator for objects of type Table_item
				cout << endl;
				k++;
			}

		}


		if(menu_choice == 'd') //Edit an item from user input, given an item's ID number
		{

			int edit_id;

			cout << "Please enter the ID of the item you wish to edit" << endl;
			cin >> edit_id;

			int k=0;

			while(inv_vect[k].item_ID != edit_id){ //traversing array for item with ID edit_id

				k++;

			}

			int new_id, new_num;
			double new_buyp, new_sellp, new_storef;

			cout << "The current item information is:" << endl;
			cout << inv_vect[k+1]; //k+1 used since above while loop exits before incrementing k

			cout << "Enter a new item ID: ";
			cin >> new_id;
			cout << endl;

			cout << "Enter a new number of items: ";
			cin >> new_num;
			cout << endl;

			cout << "Enter a new buying price: ";
			cin >> new_buyp;
			cout << endl;

			cout << "Enter a new selling price: ";
			cin >> new_sellp;
			cout << endl;

			cout << "Enter a new storage fee: ";
			cin >> new_storef;
			cout << endl;


			Table_item item(new_id, new_num, new_buyp, new_sellp, new_storef);

			inv_vect.push_back(item);

			char response;


			cout << "Item successfully edited. Would you like to store updated item in a file? (Y/N)" << endl;

			if(response == 'Y')
			{
				int h=0;

				while(h<100){


					inv_table << inv_vect[h];

					h++;

				}



			}



			if(response == 'N')

			{

				cout << "Okay then." << endl;

			}

		}


		if(menu_choice == 'e') //Closes the program and exits

		{

			char a;
			cout << "Enter any char to exit." << endl;
			cin >> a;

		} //exit


	}//end if block for option F (opening file at location)



}//end main



double profit (int num_items, double buy_price, double sell_price, double store_fee)
{

	using namespace std ;

	double a;

	a = (num_items) * ((sell_price ) - (buy_price + store_fee));

	return a;

}