/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_e_builtins.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 <fcntl.h>
#include <unistd.h>
#include <sys/wait.h>
#include <errno.h>
#include "ft_f_file.h"
#include "ft_s_destroy.h"
#include "ft_s_lcom.h"
#include "ft_s_struct.h"

static void
	ft_dup_redirs(const t_lcom *ptr,
				t_msh *msh)
{
	int32_t	fd;

	if (ptr->redir == -1)
	{
		if ((fd = open(ptr->rdrpath, O_RDONLY)) == -1)
			ft_f_file(ptr->rdrpath, msh);
		/* TODO: handle < redir */
	}
	if (ptr->redir == 1)
	{
		if ((fd = open(ptr->rdrpath,
					   O_CREAT | O_TRUNC | O_WRONLY, 0644)) == -1)
			ft_f_file(ptr->rdrpath, msh);
		dup2(fd, STDOUT_FILENO);
		close(fd);
	}
	if (ptr->redir == 2)
	{
		if ((fd = open(ptr->rdrpath,
					   O_CREAT | O_APPEND | O_WRONLY, 0644)) == -1)
			ft_f_file(ptr->rdrpath, msh);
		dup2(fd, STDOUT_FILENO);
		close(fd);
	}
}

static void
	ft_e_builtin_child(const t_lcom *ptr,
					uint8_t bu_id,
					t_msh *msh)
{
	int32_t	ret;

	ft_dup_redirs(ptr, msh);
	ret = msh->bu_ptr[bu_id](ptr->args, msh);
	ft_lcom_clear(&msh->curr);
	ft_s_destroy(msh);
	exit(ret);
}

static void
	ft_e_builtin_parent(pid_t pid,
						t_msh *msh)
{
	int32_t	status;

	while (wait(&status) != pid)
	{
		/* TODO: fix this unnormed syntax */
	}
	msh->ret = WEXITSTATUS(status);
}

void
	ft_e_builtin(const t_lcom *ptr,
				uint8_t bu_id,
				t_msh *msh)
{
	pid_t	pid;

	/* TODO: find a way to handle exit | bu_id = 6 */
	if ((pid = fork()) == 0)
	{
		ft_e_builtin_child(ptr, bu_id, msh);
	}
	else if (pid < 0)
	{
		/* TODO: handle fork failed */
	}
	else
	{
		ft_e_builtin_parent(pid, msh);
	}
}