/*
 * save.c - an example of saving hashtable items into an external file
 * 
 * usage: ./save FileName
 *
 * Xia Zhou, Spring 2022
 * 
 */

#include <stdio.h>
#include <stdlib.h>
#include "libcs50/hashtable.h"
#include "libcs50/counters.h"
#include "libcs50/memory.h"

/**************** local function prototypes ****************/
hashtable_t* init_hashtable();
static void ct_delete(void *item); 

/**************** main ****************/
int main(const int argc, char *argv[])
{
	char* program = argv[0];  // program name

	// check input arguments: # of arguments
	if (argc != 2) {
		fprintf(stderr, "usage: %s FileName\n", program);
		return 1; 
	}

	// create and initialize hashtable content
	hashtable_t* ht = init_hashtable(); 
	if (ht == NULL) {
		fprintf(stderr, "%s: failed to init hashtable\n", program);
		return 2;
	}

	// TODO: use hashtable_iterate() to save hashtable content to an external file named argv[1]


	// clean up
	hashtable_delete(ht, ct_delete);
	return 0;
}

/**************** initialize hashtable content ****************/
hashtable_t* init_hashtable()
{
	hashtable_t* ht = assertp(hashtable_new(10), "new hashtable");

	char* name1 = "wonder woman";
	counters_t *ct1 = assertp(counters_new(), "new counters");
	counters_set(ct1, 3, 6); // insert dummy counters items
	counters_set(ct1, 4, 8);
	hashtable_insert(ht, name1, ct1); 

	return ht; 
}

/******** delete counters item ********/
static void ct_delete(void *item)
{
	counters_t* ct = item;

	if (ct != NULL) {
		counters_delete(ct);
	}
}