#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

static unsigned int hotel[4];
static FILE *data;

/**
 * Retrieves the next ride details from the data file.
 *
 * WARNING: this function is not thread safe. It must be called within
 *  the context of a mutex or some other locking mechanism.
 *
 * @param[out] src Index of which hotel to pick up passengers.
 * @param[out] dest Index of destination hotel to drop off passengers.
 * @param[out] num Number of passengers to deliver.
 * @param[out] driving Time spent driving, in seconds.
 *
 * @return 1 if data file parsed and ride details written to
 * parameters, 0 if no rides remaining in data file, or -1 on error.
 */
static int get_ride(unsigned int *src, unsigned int *dest, unsigned int *num, unsigned int *driving) {
	char line[20];
	line[0] = '#';
	while (line[0] == '#') {
		if (fgets(line, sizeof(line), data) == NULL) {
			if (ferror(data)) {
				return -1;
			}
			return 0;
		}
	}
	if (line[0] == '\0') {
		return 0;
	}
	else if (strlen(line) < 5) {
		return -1;
	}
	*src = line[0] - '0';
	*dest = line[1] - '0';
	*driving = line[2] - '0';
	*num = atoi(line + 3);
	return 1;
}

/* YOUR CODE HERE */

int main(int argc, char *argv[]) {
	if (argc < 3) {
		fprintf(stderr, "Need to specify data filename and number of cabs.\n");
		exit(1);
	}
	
	if ((data = fopen(argv[1], "r")) == NULL) {
		fprintf(stderr, "Could not open `%s' for reading.\n", argv[1]);
		exit(1);
	}

	int num_cabs = atoi(argv[2]);
	hotel[0] = hotel[1] = hotel[2] = hotel[3] = 10;

	/* YOUR CODE HERE */

	printf("End of day check:\n");
	printf("  Hotel 0: %d  1: %d  2: %d  3: %d\n", hotel[0], hotel[1], hotel[2], hotel[3]);
	fclose(data);
	return 0;
}