#include <stddef.h>
#include <string.h>
#include <getopt.h>
#include "cli.h"
#include "ft_ping.h"
#include "ft_ping_const.h"

/* Forward declatation */
static void init_config(t_ping_config *config);
static void build_long_options(struct option *long_opts, size_t nb_opts,
								const t_option_descriptor *src);
static const t_option_descriptor *find_option_handler(int opt);
static int hanlde_one_option(int opt, char *optarg, t_ping_config *config);
/* ------------------- */

int
cli_parse_arguments(int argc, char **argv, t_ping_config *config)
{
	struct option	long_opts[g_options_len + 1];
	const char *opt_str = "hVvq:c:i:t:s:W:f";
	int opt;
	int res;

	init_config(config);
	build_long_options(long_opts, g_options_len, g_options);
	while (-1 != (opt = getopt_long(argc, argv, opt_str, long_opts, NULL)))
	{
		res = hanlde_one_option(opt, optarg, config);
		if (0 != res)
			return res;
	}
	return 0;
}

static int
hanlde_one_option(int opt, char *optarg, t_ping_config *config)
{	
	const t_option_descriptor *desc = find_option_handler(opt);
	int res;

	if ('?' == opt)
		return CLI_ERROR;
	if (NULL != desc)
	{
		res = desc->handler(optarg, config);
		if (0 != res)
			return res;
	}
	return 0;
}

static void
init_config(t_ping_config *config)
{
	memset(config, 0, sizeof(t_ping_config));
	config->count = DEFAULT_COUNT;
	config->interval = DEFAULT_INTERVAL;
	config->ttl = DEFAULT_TTL;
	config->packet_size = DEFAULT_PACKET_SIZE;
	config->timeout = DEFAULT_TIMEOUT;
}

static void
build_long_options(struct option *long_opts, size_t nb_opts,
					const t_option_descriptor *src)
{
	for (size_t i = 0; i < nb_opts; ++i) {
		long_opts[i].name		= src[i].long_opt;
		long_opts[i].has_arg	= src[i].has_arg;
		long_opts[i].flag		= NULL;
		long_opts[i].val		= src[i].short_opt;
	}
	long_opts[nb_opts] = (struct option){0};
}

static const t_option_descriptor
*find_option_handler(int opt)
{
	for (size_t i = 0; i < g_options_len; ++i)
	{
		if (g_options[i].short_opt == opt)
			return &g_options[i];
	}
	return NULL; 
}