// Lab3
// 
// CST116
// 
// Taylor Rogers
//

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


using std::cout;
using std::cin;
using std::endl;
using std::setw;
using std::ios;
using std::string;
using std::ifstream;
using std::ofstream;

const int MAX = 50;
int psgrsum = 0;
float totalsum = 0;

int ReadData(ifstream& inFile, int pick[], int drop[], int psgr[], float dist[], float fare[], float toll[]);
void WriteOutputFile(ofstream& outFile, int pick[], int drop[], int psgr[], float dist[], float fare[], float toll[], float total[], float cmp[], int counter);
void PrintTotalsAndSummary(ofstream& out, int totalRecords, int totalPassengers, float totalSum);


int main()
{

	// MAX set to 50 since big.txt is <50
	int pick[MAX];
	int drop[MAX];
	int psgr[MAX];
	float dist[MAX];
	float fare[MAX];
	float toll[MAX];
	float total[MAX];
	float cpm[MAX];
	int record_counter(0);
	string fnameinput;

	// Filename string from user input
	cout << "Enter the file name you wish to read data from: ";
	cin >> fnameinput;
	cout << endl;

	ifstream inFile;

	ofstream outFile("CST116-Lab3_Report-Rogers.txt");

	inFile.open(fnameinput);

	if (inFile.is_open())
	{
		record_counter = ReadData(inFile, pick, drop, psgr, dist, fare, toll);
		inFile.close();

		if (outFile.is_open())
		{
			WriteOutputFile(outFile, pick, drop, psgr, dist, fare, toll, total, cpm, record_counter);
			PrintTotalsAndSummary(outFile, record_counter, psgrsum, totalsum);
			outFile.close();
		}
		else
		{
			cout << "Trouble Opening File" << endl;
			cout << "Exiting..." << endl;
		}

	}
	else
	{
		cout << "Trouble Opening File" << endl;
		cout << "Exiting..." << endl;
	}
	return 0;
}


// Reads data from the user specified file
int ReadData(ifstream& inFile, int pick[], int drop[], int psgr[], float dist[], float fare[], float toll[])
{
	int counter = 0;
	inFile >> pick[counter] >> drop[counter] >> psgr[counter] >> dist[counter] >> fare[counter] >> toll[counter]; // Priming Read

	// Column headers
	cout << "*****Data Read From File*****" << endl;
	cout << endl;
	cout << std::left
		<< setw(15) << "Pickup"
		<< setw(15) << "Dropoff"
		<< setw(15) << "Passengers"
		<< setw(15) << "Distance"
		<< setw(15) << "Fare"
		<< setw(15) << "Toll" 
		<< endl;

	while (!inFile.eof())
	{
		cout << setiosflags(ios::left) 
			<< setw(15)  << pick[counter]
			<< setw(15) << drop[counter]
			<< setw(15) << psgr[counter]
			<< setw(15) << dist[counter]
			<< setw(15) << fare[counter]
			<< setw(15) << toll[counter]
			<< endl;

		counter++;
		inFile >> pick[counter] >> drop[counter] >> psgr[counter] >> dist[counter] >> fare[counter] >> toll[counter];
	}

	return counter;
}


// Writes data to the output file Lab3_Report.txt. This function includes a "total" and "cost per mile" column which it calculates using the file data. The passenger and cost totals are summed.
void WriteOutputFile(ofstream& outFile, int pick[], int drop[], int psgr[], float dist[], float fare[], float toll[], float total[], float cpm[],
	int counter)
{
	// Column headers
	outFile << "Here is the Output File" << endl;
	outFile << endl;
	outFile << std::left
		<< setw(15) << "Pickup"
		<< setw(15) << "Dropoff"
		<< setw(15) << "Passengers"
		<< setw(15) << "Distance"
		<< setw(15) << "Fare"
		<< setw(15) << "Toll"
		<< setw(15) << "Total"
		<< setw(15) << "Cost per Mile"
		<< endl;

	cout << endl;
	cout << "*****Here is the Output File*****" << endl;
	cout << endl;
	cout << std::left 
		<< setw(15) << "Pickup"
		<< setw(15) << "Dropoff"
		<< setw(15) << "Passengers"
		<< setw(15) << "Distance"
		<< setw(15) << "Fare"
		<< setw(15) << "Toll"
		<< setw(15) << "Total"
		<< setw(15) << "Cost per Mile" 
		<< endl;

	for (int r = 0; r <= counter - 1; r++)
	{
		// New columns for total cost and cost per mile
		total[r] = fare[r] + toll[r];
		cpm[r] = total[r] / dist[r];

		// Summing
		psgrsum += psgr[r];
		totalsum += total[r];

		// Transcribing data from file and adding total and cmp columns
		outFile << std::left
			<< setw(15) << pick[r]
			<< setw(15) << drop[r]
			<< setw(15) << psgr[r]
			<< setw(15) << dist[r]
			<< setw(15) << fare[r]
			<< setw(15) << toll[r]
			<< setw(15) << total[r]
			<< setw(15) << cpm[r]
			<< endl;

		cout << std::left
			<< setw(15) << pick[r]
			<< setw(15) << drop[r]
			<< setw(15) << psgr[r]
			<< setw(15) << dist[r]
			<< setw(15) << fare[r]
			<< setw(15) << toll[r]
			<< setw(15) << total[r]
			<< setw(15) << cpm[r]
			<< endl;
	}
}


// This function outputs the total number of entries from the data file, along with some statistics derived from the provided data.
void PrintTotalsAndSummary(ofstream& outFile, int totalRecords, int totalPassengers, float totalSum)
{
	float avgcost = 0;
	avgcost = totalSum / totalPassengers;
	// To screen
	cout << endl;
	cout << "Total Records: " << totalRecords << endl;
	cout << "Total Passengers: " << totalPassengers << endl;
	cout << "Total Cost: " << totalSum << endl;
	cout << "Average Cost: " << avgcost << endl;

	// To file
	outFile << endl;
	outFile << "Total Records: " << totalRecords << endl;
	outFile << "Total Passengers: " << totalPassengers << endl;
	outFile << "Total Cost: " << totalSum << endl;
	outFile << "Average Cost: " << avgcost << endl;
}