/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   p_line_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 "d_enum.h"
#include "s_destroy.h"
#include "f_fail.h"
#include "s_struct.h"
#include "u_vars.h"
#include "u_vars_next.h"

/* TODO: norme */

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
	**p_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
	**p_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);
}

static void
	p_register_word(char word[],
					t_msh *msh)
{
	char	name[255];
	char	val[255];
	char	*ptr;
	size_t	i;

	name[0] = '$';
	ptr = word;
	i = 1;
	while (*ptr != '=' && *ptr != '\0')
	{
		name[i] = *ptr;
		i++;
		ptr++;
	}
	name[i] = '\0';
	ptr++;
	i = 0;
	while (*ptr != '\0')
	{
		val[i] = *ptr;
		i++;
		ptr++;
	}
	val[i] = '\0';
	u_subst_var_value(name, val, msh);
}

static char
	**p_add_to_variables_and_delete(char *words[],
									t_bool reg,
									int64_t i,
									t_msh *msh)
{
	int64_t	j;
	int64_t	k;
	char	**rewords;

	j = 0;
	if (reg == TRUE)
	{
		while (words[j] && j < i)
		{
			p_register_word(words[j], msh);
			j++;
		}
	}
	j = 0;
	while (words[i + j] != NULL)
		j++;
	if (!(rewords = (char**)malloc((j + 1) * sizeof(char*))))
	{
		ft_delwords(words);
		f_alloc_and_destroy_msh(msh);
	}
	k = i;
	while (i - k < j)
	{
		if (!(rewords[i - k] = ft_strdup(words[i])))
		{
			ft_delwords(words);
			f_alloc_and_destroy_msh(msh);
		}
		i++;
	}
	rewords[i - k] = 0;
	ft_delwords(words);
	i++;
	return (rewords);
}

static void
	p_add_to_env_fork(int64_t i,
					char *words[],
					t_msh *msh)
{
	int64_t	j;

	j = 0;
	while(j < i)
	{
		ft_strlcpy(msh->env_fork_tmp[j], words[j], ft_strlen(words[j]) + 1);
		j++;
	}
	msh->env_fork_tmp[j][0] = '\0';
}

char
	**p_check_args_equals(char *words[],
						t_msh *msh)
{
	char	*ptr;
	t_bool	reg;
	t_bool	isvar;
	int64_t	i;

	i = 0;
	reg = FALSE;
	isvar = FALSE;
	while (words[i])
	{
		ptr = words[i];
		while (*ptr != '\0' && *ptr != '=')
			ptr++;
		if (*ptr == '=')
		{
			reg = TRUE;
			isvar = TRUE;
		}
		if (*ptr == '\0' || words[i][0] == '=' || ft_isdigit(words[i][0]) == 1)
		{
			reg = FALSE;
			if (i == 0)
				isvar = FALSE;
			if (isvar == TRUE)
				p_add_to_env_fork(i, words, msh);
			else
				msh->env_fork_tmp[0][0] = '\0';
			break ;
		}
		i++;
	}
	if (isvar == TRUE)
		return (p_add_to_variables_and_delete(words, reg, i, msh));
	return (words);
}