#include <iostream.h>
#include <fstream.h>
#include <string.h>
#include <stdlib.h>

void main(int argc, char* argv[]) {
	if (argc != 2) 
	{
		cout << "Must specify the event file" << endl;
		exit(1);
	}
	ifstream EventFile(argv[1]);
	ofstream out("mails.txt");
	char* field = new char[120]; // stores the current field
	int SumOfTime = 0;
	int NumberOfEvents = 0;
	int counter = 0;
	bool sending;

	EventFile.getline(field, 120);	// skip the first line

	// output the header 
	out << "event_id" << "  ";
	out << "event_type" << "     ";
	out << "time" << "     ";
	out << "receiver_id" << "     ";
	out << "sender_id" << "    ";	
	out << "priority" << "     " << '\t';
	out << "message" << endl;

	// read and process each field of an field
	while (EventFile >> field) {
		switch (counter++ % 6) {
			case 0: out << field << '\t';	// event_id
					NumberOfEvents++;
					break;
			case 1: out << field << '\t';	// event_type
					if (field[0] == 'S')
						sending = true;
					else sending = false;
					break;
			case 2: out << field << '\t';	// time
					SumOfTime = SumOfTime + atoi (field);
					break;
			case 3: out << field <<'\t';	// receiver_id
					if (!sending) 
					{
						counter = 0;		// reset counter
						out << endl;
					}
					break;
			case 4: out << field <<'\t';	// sender_id
					break;
			case 5: out << field;			// priority
					EventFile.getline(field, 80);	// message
					out << field << endl;
		}	// end switch
	}		// end while

	out << "Average event time: " << SumOfTime/NumberOfEvents << endl;
	EventFile.close();
	out.close();
}