#include <iostream>
#include <fstream>
using namespace std;

void Initialize (int[], int[]);
void PrintBookings(int [],int [], int);
int FindFlight (int [], int, int);
int main () {
	int flightNo[20];
	int bookings[20];
	int i, type, flightnumb, seats, search;
	for (i=0; i<20; i++){
		flightNo[i]=0;
		bookings[i]=0;
	}
	
	Initialize (flightNo, bookings);
	
	PrintBookings (flightNo, bookings, 17);
	
	
	ifstream File ("/Users/mine/Programming/Assignment 7/transactions.txt", ios::in);
	File >> type >> flightnumb >> seats;
	


	while (File) {
		search= FindFlight(flightNo, 20, flightnumb);
		if (search ==-1){
			cout << "Invalid Flight Number" << endl;
		} else {
			if (type==2){
				// cancel a flight
				if (seats > bookings [search])
					cout << seats << " seats were not cancled from flight "<< flightnumb << " (excess of seats booked)"<< endl;
				else {
						bookings[search]-=seats;
						cout << seats << " seats subtracted from flight " << flightnumb << endl;
				}
			} else if (type==1){
				// add a flight
				bookings[flightnumb]+=seats;
				cout << seats << " seats added to flight " << flightnumb << endl;
			} else cout << "Transaction Type Invalid" << endl;
		}
		File >> type >> flightnumb >> seats;
	}
	
	PrintBookings (flightNo, bookings, 17);
	
    return 0;
}


 void Initialize (int flight[], int bookings[]){
	 int i;
	 int count=0;
	ifstream File ("/Users/mine/Programming/Assignment 7/info.txt", ios::in);
	for (i=0; i<=10; i++){
		File >> flight[i];
		bookings[i]=0;
		count++;
	}
	return;
}

void PrintBookings (int flight [], int bookings [], int count){
	int i;
	cout.width(10);
	cout << "Flight number";
	cout.width(15);
	cout << "Current Booking" << endl;	
	for (i=0; i<count; i++){
		cout.width(10);
		cout << flight[i];
		cout.width(13);
		cout << bookings[i]<< endl;
	}

	return;	
}

int FindFlight (int flightNo[], int count, int flight){
	int i;
	for (i=0; i<count; i++) {
		if (flightNo[i]==flight)
			return i;
	}
	return -1;
}