/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   b_export.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 "b_env.h"
#include "b_export_next.h"
#include "d_enum.h"
#include "f_fail.h"
#include "s_destroy.h"
#include "s_lcom.h"
#include "s_lvars.h"
#include "s_struct.h"
#include "u_utils.h"
#include "u_vars.h"

static t_bool
	check_valid_identifier(const char *arg)
{
	char	*ptr;

	ptr = (char*)arg;
	if (ft_isalpha(ptr[0]))
	{
		return (TRUE);
	}
	return (FALSE);
}

static t_bool
	check_equals(const char *arg)
{
	char	*ptr;

	ptr = (char*)arg;
	while (*ptr != '\0')
	{
		if (*ptr == '=')
			return (TRUE);
		ptr++;
	}
	return (FALSE);
}

static void
	b_add_to_env_from_globals(const char varname[],
							const char var[],
							t_msh *msh)
{
	size_t	i;
	char	**nenvp;

	i = 0;
	while (msh->envp[i] != NULL)
		i++;
	if (!(nenvp = (char**)malloc((i + 2) * sizeof(char*))))
		f_fail_alloc_and_destroy(msh);
	i = 0;
	while (msh->envp[i] != NULL)
	{
		if (!(nenvp[i] = ft_strdup(msh->envp[i])))
			f_fail_alloc_and_destroy(msh);
		i++;
	}
	if (!(nenvp[i] = ft_strdup(var)))
		f_fail_alloc_and_destroy(msh);
	nenvp[i + 1] = 0;
	ft_delwords(msh->envp);
	lvars_delone(&msh->vars, varname);
	msh->envp = nenvp;
}

uint8_t
	b_export(char *args[],
			t_msh *msh)
{
	/* TODO: norme */
	const uint64_t	argc = get_argc((const char**)args);
	char			**ptr;
	char			*varval;
	/* char			*varname; */
	char			fmt[255];
	t_bool			next;
	uint8_t			r;

	if (argc == 0)
	{
		return (b_env(NULL, msh));
	}
	ptr = args;
	r = 0;
	while (*ptr)
	{
		next = FALSE;
		if (check_valid_identifier(*ptr) == FALSE)
		{
			f_fail_identifier("export", *ptr, msh);
			next = TRUE;
			r = 1;
		}
		if (next == FALSE && check_equals(*ptr) == FALSE)
		{
			next = TRUE;
			ft_sprintf(fmt, "$%s", *ptr);
			varval = get_cstm_vr(fmt, msh);
			if (varval != NULL)
			{
				ft_sprintf(fmt, "%s=%s", *ptr, varval);
				b_add_to_env_from_globals(*ptr, fmt, msh);
			}
		}
		else if (next == FALSE && check_equals(*ptr) == TRUE)
		{
			b_export_with_equals(*ptr, msh);
		}
		ptr++;
	}
	 /* TODO: finish export */
	return (r);
}