/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line.c                                    :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: grobledo <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/05/05 20:41:22 by grobledo          #+#    #+#             */
/*   Updated: 2023/05/05 20:41:25 by grobledo         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
#include "libft.h"

char	*ft_join( char *buffer, char *buff_read)
{
	char	*temp;

	temp = ft_strjoing(buffer, buff_read);
	free (buffer);
	return (temp);
}

char	*ft_nextline(char *buffer)
{
	int		i;
	int		j;
	char	*nextline;

	i = 0;
	while (buffer[i] && buffer[i] != '\n')
		i++;
	if (buffer[i] == '\n')
		i++;
	if (!buffer[i])
	{
		free (buffer);
		return (NULL);
	}
	j = 0;
	nextline = ft_calloc(ft_strleng(buffer) - i + 1, sizeof(char));
	while (buffer[i])
	{
		nextline[j++] = buffer[i++];
	}
	free (buffer);
	return (nextline);
}

char	*ft_line(char *buffer)
{
	char	*line;
	int		i;

	i = 0;
	if (!buffer)
		return (NULL);
	while (buffer[i] && buffer[i] != '\n')
		i++;
	line = ft_calloc(i + 2, sizeof(char));
	i = 0;
	while (buffer[i] && buffer[i] != '\n')
	{
		line[i] = buffer[i];
		i++;
	}
	if (buffer[i] && buffer[i] == '\n')
		line[i] = '\n';
	return (line);
}

char	*ft_readfile(int fd, char *buffer)
{
	int		byte_read;
	char	*buff_read;

	buff_read = ft_calloc(BUFFER_SIZE + 1, sizeof(char));
	byte_read = 1;
	while (byte_read > 0)
	{
		byte_read = read(fd, buff_read, BUFFER_SIZE);
		if (byte_read == 0)
			break ;
		if (byte_read == -1)
		{
			free(buff_read);
			return (NULL);
		}
		buff_read[byte_read] = 0;
		buffer = ft_join(buffer, buff_read);
		if (ft_strrchr(buff_read, '\n'))
			break ;
	}
	free (buff_read);
	return (buffer);
}

char	*get_next_line(int fd)
{
	char		*line;
	static char	*buffer = NULL;

	if (fd < 0 || BUFFER_SIZE <= 0 || read(fd, 0, 0) < 0)
		return (NULL);
	buffer = ft_readfile(fd, buffer);
	if (!buffer)
		return (NULL);
	line = ft_line(buffer);
	buffer = ft_nextline(buffer);
	return (line);
}