#include <list>
#include <fstream>
#include <iostream>
#include "vehicle.h"

using namespace std;

typedef list<Vehicle *> VehiclePointerList;

void openInputFile(ifstream& infile);
void fillListFromFile(ifstream& infile, VehiclePointerList& vl);
void printVehicleList(VehiclePointerList& vl);

int main()
{
	list<Vehicle*> vl;
	ifstream infile;

	openInputFile(infile);
	fillListFromFile(infile, vl);
	printVehicleList(vl);
	return 0;
}

void printVehicleList(VehiclePointerList& vl)
{
	for (VehiclePointerList::iterator i = vl.begin(); i != vl.end(); i++)
		(*i)->print();
}

void openInputFile(ifstream& infile)
{
	const int failLimit = 4;
	char infileName[256];
	int failCount = 0;

	do {
		cout << "Enter the name of the input file: ";
		cin >> infileName;

		infile.clear();
		infile.open(infileName);

		if (infile.fail()) {
			cout << "The file whose name you've entered can't be opened. " << endl;
			failCount++;
			if (failCount > failLimit) {
				cout << "The program is terminating." << endl;
				exit(1);
			}
		}
	} while (infile.fail());
}

void fillListFromFile(ifstream& infile, VehiclePointerList& vl)
{
	char vehicleType;
	int vin, modelYear, doors, passCap, emptyWeight, load;

	while (infile >> vehicleType) {
		if (tolower(vehicleType) == 'c') {
			infile >> vin >> modelYear >> doors >> passCap;
			vl.push_back(new Car(vin, modelYear, doors, passCap));
		}
		else if (tolower(vehicleType) == 't') {
			infile >> vin >> modelYear >> emptyWeight >> load;
			vl.push_back(new Truck(vin, modelYear, emptyWeight, load));
		}
		else {
			cout << "Unknown vehicle type encountered: " << vehicleType << endl;
			exit(1);
		}
	}
}