/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   p_lcom_next.c                                      :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: rbousset <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/02/14 17:19:27 by rbousset          #+#    #+#             */
/*   Updated: 2020/02/14 17:19:29 by rbousset         ###   ########lyon.fr   */
/*                                                                            */
/* ************************************************************************** */

#include <libft.h>
#include <stdlib.h>
#include <stdint.h>

#include "s_struct.h"
#include "u_vars.h"

static int8_t
	subst_those_vars(int64_t i,
						char **p_words,
						t_msh *msh)
{
	size_t	varlen;
	char	*s_varname;
	char	*varval;

	varval = NULL;
	s_varname = NULL;
	varlen = i + 1;
	while ((*p_words)[varlen] != '\0' &&
		!ft_ischarset("$=/#@%^*+{}[],.?-", (*p_words)[varlen]))
		varlen += 1;
	if (!(s_varname = ft_substr(*p_words, (uint32_t)i, varlen - i)))
		return (-1);
	varval = u_get_var_value(s_varname, msh);
	*p_words = ft_strsubst(*p_words, s_varname, varval);
	ft_memdel((void*)&s_varname);
	ft_memdel((void*)&varval);
	return (0);
}

char
	**subst_vars(char *words[],
					t_msh *msh)
{
	char	**p_words;
	int64_t	i;

	p_words = words;
	i = 0;
	while (*p_words)
	{
		while ((i = ft_strlchr((*p_words), '$')) != -1)
		{
			if (*(*p_words) + i - 1 != '\\')
			{
				if (subst_those_vars(i, p_words, msh) != 0)
					return (NULL);
			}
		}
		p_words += 1;
	}
	return (words);
}


char
	**subst_args(const char word[],
					int8_t redir)
{
	char	**words;
	char	*subst;
	size_t	i;

	if (redir == 0)
	{
		if (!(words = ft_split(word, ' ')))
			return (NULL);
		return (words);
	}
	i = 0;
	while (word[i] && !ft_ischarset("<>", word[i]))
		i++;
	while (redir > 0 && ft_isdigit(word[i]))
		i--;
	if (!(subst = ft_substr(word, 0, i)))
		return (NULL);
	if (!(words = ft_split(subst, ' ')))
	{
		ft_memdel((void*)&subst);
		return (NULL);
	}
	ft_memdel((void*)&subst);
	return (words);
}