/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_ping.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: tomoron <tomoron@student.42angouleme.fr>   +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/04/24 00:03:56 by tomoron           #+#    #+#             */
/*   Updated: 2025/04/25 23:05:43 by tomoron          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "includes/ft_ping.h"

void show_help(t_settings *set, char *name)
{
	set->stop = 1;
	write(1, "Usage: ", 7);
	write(1, name, strlen(name));
	write(1, HELP_MESSAGE, sizeof(HELP_MESSAGE));
}

char *get_value_in_arg(char *arg, int end)
{
	char *res;

	res = strstr(arg, "=");
	if(res - arg != end)
		return (0);
	if (!res)
		return (0);
	res++;
	return(res);
}

int get_setting(int *i, int argc, char **argv, int end)
{
	char *value;
	char *tmp;

	value = 0;
	if(argv[*i][0] == '-' && argv[*i][1] == '-')
		value = get_value_in_arg(argv[*i], end);
	else if((*i) + 1 < argc)
		value = argv[++(*i)];
	if(!value)
	{
		fprintf(stderr, "%s: option '%s' requires an option\n", argv[0], argv[*i]);
		return(0);
	}
	tmp = value;
	while(*tmp)
	{
		if(!isdigit(*tmp))
		{
			fprintf(stderr, "%s: invalid value (`%s' near `%s')\n", argv[0], value, tmp);
			return(0);
		}
		tmp++;
	}
	return(atoi(value));
}

void parse_opt(int *i, t_settings *set, int argc, char **argv)
{
	if(!strcmp(argv[*i], "-?") || !strcmp(argv[*i], "--help"))
		show_help(set, *argv);
	else if(!strcmp(argv[*i], "-c") || !strncmp(argv[*i], "--count", 7))
		set->count = get_setting(i, argc, argv, 7);
	else if(!strcmp(argv[*i], "-w") || !strncmp(argv[*i], "--timeout", 9))
		set->timeout = get_setting(i, argc, argv, 9);
	else if(!strncmp(argv[*i], "--ttl", 5))
		set->ttl = get_setting(i, argc, argv, 5);
	else if(!strcmp(argv[*i], "-f") || !strcmp(argv[*i], "--flood"))
		set->flood = 1;
	else if(!strcmp(argv[*i], "-n") || !strcmp(argv[*i], "--numeric"))
		set->no_resolve = 1;
	else
	{
		fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], argv[*i]);
		set->err = 1;
	}
	(*i)++;
}

int add_host(t_settings *res, char *host)
{
	t_host_list *new;

	new = malloc(sizeof(t_host_list));
	if(!new)
		return(0);
	new->host = host;
	new->next = res->hosts;
	res->hosts = new;
	return(1);
}

void free_hosts(t_host_list *list)
{
	t_host_list *tmp;

	while(list)
	{
		tmp = list->next;
		free(list);
		list = tmp;
	}
}

t_settings parse_args(int argc, char **argv)
{
	int i;
	t_settings res;

	i = 1;
	bzero(&res, sizeof(t_settings));
	while(i < argc)
	{
		if(*argv[i] == '-')
			parse_opt(&i, &res, argc, argv);
		else
		{
			if(!add_host(&res, argv[i]))
			{
				res.err = 1;
				return(res);
			}
		}
	}
	return(res);
}

int main(int argc, char **argv)
{
	t_settings settings;

	settings = parse_args(argc, argv);
	if(settings.stop || settings.err)
	{
		free_hosts(settings.hosts);
		return((settings.err != 0) * 64);
	}
	if(!settings.hosts)
	{
		fprintf(stderr, "%s: missing host operand\n", argv[0]);
		return(64);
	}

	return(0);
}