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

#include "boom.h"

/*
 * author: pikachu
 * date: 24 aug 2015
 * last update: 2 jun 2017
 * pledge: this is my own work, unless otherwise noted
 */

/* this is the solution */


/* globals go here */

int g_debug = 0 ;  // global declaration; extern definition in header 
int g_verbose = 0 ;

/* defines go here, in SHOUTY_CASE */
#define N_DEFAULT 10
#define USAGE_MESSAGE "usage: boom [-vuh] [-n num] " 

int main(int argc, char * argv[]) {

	int is_up = 0 ;
	int ch ;
	int n = N_DEFAULT ;
	int i ;  // this goes here

	while ((ch = getopt(argc, argv, "n:vuh")) != -1) {
		switch(ch) {
			case 'n':
				n = atoi(optarg) ;
				break ;
			case 'v':
				g_verbose = 1 ;
				break ;
			case 'u':
				is_up = 1 ;
				break ;
			case 'h':
			default:
				printf("%s\n", USAGE_MESSAGE) ;
			return 0 ;
		}
	}
	argc -= optind;
	argv += optind;

	if ( argc>0 ) {
		printf("%s\n", USAGE_MESSAGE) ;
		return 0 ;
	}

	/* example of an assertion */
	assert(n>0) ;

	/* example of g_verbose */
	if (g_verbose) {
		printf("%s:%d: n=%d\n", __FILE__, __LINE__, n) ;
	}

	/*
	 * do not int i here! ASCII C does not allow it
	 * 
	 */

	if ( is_up ) {
		for (i=0;i<=n;i++) {
			printf("%d\n",i) ;
		}
	}
	else { /* is down */
		for (i=n;i>=0;i--) {
			printf("%d\n",i) ;
		}
	}
	printf("Boom!\n") ;
	return 0 ;
}