// project3.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <sstream>
using namespace std;

char fileName; // Windows name of the file in step 1
char newFileName; // Windows file name of the file of extracted records
int requestId; // product ID number used to extract data
const int ORDER_VALUE = 500; // quantity value used to extract data, global const of value 500
long idArray[20]; // array of ID numbers
int storeArray[20]; // array of stored numbers
int qtyArray[20]; // array of quantities
int actualcount; // actual number of cells filled in the arrays
int newcount; // number of extracted records written to newFileName
int maxCells;

bool loadArrays(const char fileName[], long idArray[], int storeArray[], int qtyArray[], int &count, int maxCells);
void printArrays(ostream & where, const long idArray[], const int storeArray[], const int qtyArray[], int count);
bool extractData(const char newFileName[], int requestId, int baseQty, const long idArray[], const int storeArray[], const int qtyArray[], int count, int& newcount);

int main()
{
    actualcount = 0;

    loadArrays("data.txt", idArray, storeArray, qtyArray, actualcount, 20);
    printArrays(cout, idArray, storeArray, qtyArray, actualcount);
    extractData("extractedata.txt", 96605, ORDER_VALUE, idArray, storeArray, qtyArray, actualcount, newcount);

    return 0;
}

/*
Will load the three arrays from data from the disk file and use count for the number of cells loaded.  Be certain to check that you do not load more cells than you have dimensioned.
Return true if you were able to load all of the data,
return false otherwise.  The variable count will hold the
number of cells loaded.*/

bool loadArrays(const char* fileName, long idArray[], int storeArray[], int qtyArray[], int &count, int maxCells)
{
    count = 0;
    ifstream myfile(fileName);
    if (myfile.is_open())
    {
        while (count < maxCells)
        {
            myfile >> idArray[count];
            myfile >> storeArray[count];
            myfile >> qtyArray[count];
            count++;
        }
        if (count >= maxCells)
        {
            cout << "Unable to load all data, partial list below." << endl;
        }
        myfile.close();
        return true;
    }
    else
    {
        cout << "File cannot be opened." << endl;
        myfile.close();
        return false;
    }
}



/*Will print to the stream where the data in the arrays.
Count tells the number of cells filled.*/

void printArrays(ostream & where, const long idArray[], const int storeArray[], const int qtyArray[], int count)
{
    for (int x = 0; x < count; x++)
    {
        cout << "ID:" << idArray[x] << " Store Number: " << storeArray[x] << " Quantity: " << qtyArray[x] << endl;
    }
}



/*Will use the value in requestId to write only the records with that id number that have a quantity below baseQty(the ORDER_VALUE) to the new file. The variable newcount will hold the number of records actually written.  The return value will be false if the
file could not be opened, otherwise the return value will be true.*/


bool extractData(const char* newFileName, int requestId, int baseQty, const long idArray[], const int storeArray[], const int qtyArray[], int count, int &newcount)
{
    std::ofstream fileOut(newFileName);
    newcount = 0;
    if ((fileOut.is_open()))
    {
        for (int x = 0; x < count; x++)
        {
            if ((idArray[x] == requestId) && (qtyArray[x] < ORDER_VALUE))
            {
                fileOut << "ID: " << idArray[x] << " quantity: " << qtyArray[x] << endl;
                newcount++;
            }
        }
        fileOut.close();
        return true;
    }
    else
        return false;
}

/*
ID:16724 Store Number: 27 Quantity: 134
ID:53602 Store Number: 83 Quantity: 233
ID:75840 Store Number: 32 Quantity: 683
ID:80833 Store Number: 75 Quantity: 135
ID:69352 Store Number: 92 Quantity: 907
ID:48582 Store Number: 34 Quantity: 625
ID:76600 Store Number: 66 Quantity: 484
ID:31592 Store Number: 35 Quantity: 400
ID:96605 Store Number: 90 Quantity: 321
ID:84393 Store Number: 67 Quantity: 539
ID:46977 Store Number: 96 Quantity: 322
ID:85737 Store Number: 49 Quantity: 430
ID:32502 Store Number: 26 Quantity: 280
ID:78712 Store Number: 75 Quantity: 789
ID:76810 Store Number: 64 Quantity: 521
ID:96605 Store Number: 51 Quantity: 114
ID:57203 Store Number: 46 Quantity: 922
ID:10937 Store Number: 12 Quantity: 435
ID:37371 Store Number: 52 Quantity: 833
ID:96605 Store Number: 26 Quantity: 577
Press any key to continue . . .*/

/*
Unable to load all data, partial list below.
ID:16724 Store Number: 27 Quantity: 134
ID:53602 Store Number: 83 Quantity: 233
ID:75840 Store Number: 32 Quantity: 683
ID:80833 Store Number: 75 Quantity: 135
ID:69352 Store Number: 92 Quantity: 907
ID:48582 Store Number: 34 Quantity: 625
ID:76600 Store Number: 66 Quantity: 484
ID:31592 Store Number: 35 Quantity: 400
ID:96605 Store Number: 90 Quantity: 321
ID:84393 Store Number: 67 Quantity: 539
ID:46977 Store Number: 96 Quantity: 322
ID:85737 Store Number: 49 Quantity: 430
ID:32502 Store Number: 26 Quantity: 280
ID:78712 Store Number: 75 Quantity: 789
ID:76810 Store Number: 64 Quantity: 521
ID:96605 Store Number: 51 Quantity: 114
ID:57203 Store Number: 46 Quantity: 922
ID:10937 Store Number: 12 Quantity: 435
ID:37371 Store Number: 52 Quantity: 833
ID:96605 Store Number: 26 Quantity: 577
Press any key to continue . . .*/