#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <string.h>
#include <time.h>
#include<stdbool.h>
#include <math.h>

int genRandClass()
{
	int num = rand() % 3 + 1;
	return num;
}

int genRandEngine()
{
	int num = rand() % 2;
	if (num == 0)
	{
		return 2;
	}
	else
	{
		return 4;
	}
}

typedef struct starShip
{
	double starShipClass,
		numOfEngines;
	pthread_mutex_t lock;
}starShipInstance;

void init(starShipInstance* starShip)
{
	starShip->starShipClass = 0;
	starShip->numOfEngines = 0;
	pthread_mutex_init(&starShip->lock, NULL);
}

double globalShipCount = 0;
double globalTimeSpent = 0;
starShipInstance starShip;

void spawnShip(starShipInstance* currShip)
{
	pthread_mutex_lock(&currShip->lock);
	currShip->starShipClass = (double)genRandClass();
	currShip->numOfEngines = (double)genRandEngine();
	//printf("%f\n", currShip->starShipClass);
	//printf("%f\n", currShip->numOfEngines);
	pthread_mutex_unlock(&currShip->lock);
}

/*double timeRefuelling(starShipInstance* currShip)
{
	pthread_mutex_lock(&currShip->lock);
	double timeSpent;
	timeSpent = currShip->starShipClass * currShip->numOfEngines;
	pthread_mutex_unlock(&currShip->lock);
	return timeSpent;
}*/

int getClass(starShipInstance* starShip)
{
	pthread_mutex_lock(&starShip->lock);
	int shipClass = starShip->starShipClass;
	pthread_mutex_unlock(&starShip->lock);
	return shipClass;
}

int getEngine(starShipInstance* starShip)
{
	pthread_mutex_lock(&starShip->lock);
	int shipEngine = starShip->numOfEngines;
	pthread_mutex_unlock(&starShip->lock);
	return shipEngine;
}

void* fuelShip(void* vargp)
{
	srand(time(NULL));
	for (int i = 0; i <= 10000; i++)
	{
		spawnShip(&starShip);
		globalShipCount++;
		globalTimeSpent += (getClass(&starShip) * getEngine(&starShip));
		//globalTimeSpent += timeRefuelling(&starShip);
	}
	return NULL;
}



int main()
{
	pthread_t threadId[4];

	for (int i = 0; i < 4; i++)
		pthread_create(&threadId[i], NULL, fuelShip, (void*)&threadId);

	for (int i = 0; i < 4; i++)
		pthread_join(threadId[i], NULL);

	printf("\nTotal refueling time: %f centuries", globalTimeSpent);
	printf("\nTotal starship count: %f starships", globalShipCount);
}