#include <iostream>
#include <pthread.h>
#include <semaphore.h>
#include <unistd.h>
#include <cstdlib>
#include <ctime>


int gCount = 0;
int sCount = 0;
int customerIDs[100];
bool sandwiches[2];

sem_t gLock;
sem_t fLock;

std::string randOrder()
{
    srand(time(0));
    std::string order = "";

    int randNum = (rand() % 3) + 1;
    switch(randNum)
    {
        case 1: order = "Cheese";
        case 2: order = "Ham";
        case 3: order = "Ham&Cheese";
    }
    return order;


}

void *spawnWorkers(void *tid)
{
    int id = *((int*)tid);

    sem_wait(&gLock);
    usleep(1000000);
    std::cout << "Worker " << id << " spawned " << gCount << std::endl;
    gCount++;
    usleep(1000000);
    if(sCount<2)
    {
        std::cout << "Worker " << id << " works at station " << sCount << std::endl;
        sCount++;
    }

    sem_post(&gLock);

    sem_wait(&gLock);
    for(int s=0; s<sCount; s++)
    {
        sandwiches[s] = true;
        std::cout << "Sandwich ready " << std::endl;
    }
    sCount--;
    sem_post(&gLock);

    pthread_exit(NULL);

}


void *spawnCustomers(void *tid)
{
	int id = *((int*)tid);
	int count = 0;
	//unsigned int microseconds = 100;
	sem_wait(&gLock);
    std::cout << "Customer " << id << " stands in line " << gCount << std::endl;
    customerIDs[count] = gCount;
    count++;
	gCount++;
    usleep(100009);
    sem_post(&gLock);

	pthread_exit(NULL);
}

int main(int argc, const char** argv)
{
	sem_init(&gLock, 0, 1);
    int count = 0;
    pthread_t CustomerThreads[10];
    pthread_t WorkerThreads[5];

    sem_wait(&fLock);
	for(int i=0; i<10; i++)
	{
		int rc = pthread_create(&CustomerThreads[i],NULL,spawnCustomers,(void*)&i);
		if(rc)
		{
			std::cerr << "Unable to spawn thread " << i << std::endl;
			exit(-1);
		}
	}

	for(int i=0; i<5; i++)
    {
        int rc = pthread_create(&WorkerThreads[i],NULL,spawnWorkers,(void*)&i);
        if(rc)
        {
            std::cerr << "Unable to spawn thread " << i << std::endl;
            exit(-1);
        }
    }
	sem_post(&fLock);
    sem_wait(&fLock);
	for(int i=0; i<10; i++)
    {
	    std::cout << customerIDs[i] << " ";
    }
	sem_post(&fLock);

	//return 0;
	pthread_exit(NULL);
}