// BlankConsoleLab.cpp : This file contains the 'main' function. Program execution begins and ends there.
// CST116 Aaron Hill

#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>

using namespace std;

int pickUp[50];
int dropOff[50];
int passengerCount[50];

float distanceTravelled[50];
float fareAmount[50];
float tollAmount[50];
float costPerMile[50];

double totalFare[50];

int numEntries;

int ReadData(ifstream& file) {

    // Takes a file input, reads the arrays in the file, and puts them in the corresponding array in the program.
    // t is the number of entries found. Starts at -1 because the loop begins with an increment.

    int t = -1;

    while (!file.eof()) {

        t++;

        file >> pickUp[t] >> dropOff[t] >> passengerCount[t] >> distanceTravelled[t] >> fareAmount[t] >> tollAmount[t];

        // Below are the calculations for the total fare and cost per mile.

        totalFare[t] = fareAmount[t] + tollAmount[t];

        if (distanceTravelled[t] != 0) {

            costPerMile[t] = fareAmount[t] / distanceTravelled[t];

        }
        else costPerMile[t] = 0; // Special case for 0 miles ; prevents divide by 0 error.

    }

    t++; // Increment outside of the loop. Arrays begin at 0, but the returning value is the total number of objects, hence +1 at the end.

    return t;

}

void GenerateTotals(int numEntries) {

    // Loops through the arrays times the amount of entries found in the file. (This value is passed in.)
    // Two local variables are initialized at 0 and each value from the arrays is added to the appropriate variable.

    int totalPassengers = 0;
    double totalPaid = 0;

    for (int i = 0; i <= numEntries; i++) {

        totalPassengers += passengerCount[i];
        totalPaid += totalFare[i];

    }

    // Just printing the basic statistics.

    cout << "TOTAL PASSENGERS: " << totalPassengers << endl;
    cout << "TOTAL PAID: $" << totalPaid << endl;
    cout << "AVG COST PER PERSON: $" << totalPaid / totalPassengers << endl;
    cout << "TOTAL TRIPS: " << numEntries << endl;

}

int main()
{
    // Some initialization

    ifstream inFile;
    string fileName;

    cout << fixed << setprecision(2);
    char choice = 'Y';

    // Body contained within a loop to allow the user to enter another file.

    while (choice == 'Y') {

        // Until the user enters a valid file name, the program will not continue.

        while (!inFile.is_open()) {

            cout << "Please enter your data file name with the .txt extension:" << endl;
            cin >> fileName;

            inFile.open(fileName);

            if (inFile.is_open()) {
                cout << "\nOpened " << fileName << endl;
            }
            else {
                cout << "\nFailed to open " << fileName << endl;
            }

            cout << endl;

        }

        // Fetching the # of entries and setting the values used in the program through ReadData().

        int numEntries = ReadData(inFile);

        // Printing basic statistics

        GenerateTotals(numEntries);

        // Asking the user if they want to show a table of the file they read in

        choice = 'A';

        while (choice != 'Y' && choice != 'N') {

            cout << "\nWould you like to display a table? Y/N" << endl;
            cin >> choice;

        }

        if (choice == 'Y') {

            // Table headers

            cout << left << setw(10) << "\nENTRY" << setw(10) << "PICKUP"
                << setw(10) << "DROPOFF" << setw(10) << "#PASS"
                << setw(10) << "DIST" << setw(10) << "FARE$"
                << setw(10) << "TOLL$" << setw(10) << "TOTAL$"
                << setw(10) << "$/MILE" << endl;

            // Table values

            for (int i = 0; i < numEntries; i++) {

                cout << left << setw(10) << i + 1 << setw(10) << pickUp[i]
                    << setw(10) << dropOff[i] << setw(10) << passengerCount[i]
                    << setw(10) << distanceTravelled[i] << setw(10) << fareAmount[i]
                    << setw(10) << tollAmount[i] << setw(10) << totalFare[i]
                    << setw(10) << costPerMile[i] << endl;

            }
        }

        // Finally, asking the user if they want to open another file.

        choice = 'A';

        while (choice != 'Y' && choice != 'N') {

            cout << "\nWould you like to open another file? Y/N" << endl;
            cin >> choice;

        }

        // Stops reading the file and preps for the next potential loop.

        inFile.close();
        cout << endl;

    }

}