#include "minishell.h"

void	**cmd_path(char **argv, char **envp)
{
	int		i;
	char	**path;
	char	*cmd;

	i = 0;
	while (envp[i] && ft_strncmp(envp[i], "PATH=", 5))
		i++;
	path = ft_split(envp[i] + 5, ':'); // 5 = lentgh of "PATH="
	i = -1;
	while (*path && i != 0)
	{
		cmd = ft_strjoin(path[0], "/");
		cmd = ft_strjoin(cmd, argv[0]);
		i = access(cmd, X_OK);
		path++;
	}
	argv[0] = cmd;
	return (NULL);
}

int	handle_fd(char **input, int i, int fdin, int *fd_in, int *fd_out)
{
	int		*pipes_fd;
	int		next_in;
	char	*tmp;

	*fd_in = fdin;
	*fd_out = 1;
	next_in = 0;
	if (input[i + 1])
	{
		pipes_fd = calloc(2, sizeof(int));
		pipe(pipes_fd);
		*fd_out = pipes_fd[1];
		next_in = pipes_fd[0];
	}
	tmp = ft_strchr(input[i], '>');
	if (tmp)
	{
		tmp[0] = '\0';
		tmp = ft_strtrim(tmp + 2, " "); // +2 for "> "
		*fd_out = open(tmp, O_WRONLY | O_TRUNC);
		next_in = *fd_out;
	}
	return (next_in);
}

t_list	*parser(char *input, char **envp)
{
	t_list	*cmd;
	t_cmd	*element;
	char	**input_split;
	int		i;
	int		tmp_fd;

	input_split = ft_split(input, '|');
	tmp_fd = 0;
	i = 0;
	cmd = NULL;
	while (input_split[i])
	{
		element = calloc(1, sizeof(t_cmd));
		tmp_fd = handle_fd(input_split, i, tmp_fd, &(element->fd_in), &(element->fd_out));
		element->argv = ft_split(input_split[i], ' ');
		element->builtin = cmd_path(element->argv, envp);
		ft_lstadd_back(&cmd, ft_lstnew(element));
		i++;
	}
	return (cmd);
}