/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   caller.c                                           :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: narnaud <narnaud@student.42.fr>            +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/02/16 16:46:53 by narnaud           #+#    #+#             */
/*   Updated: 2022/03/24 17:15:24 by narnaud          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "minishell.h"

int	command_call(char *argv[], int input_fd, int output_fd)
{
	if (ft_strncmp(argv[0], "echo", 4) == 0)
		return (ft_echo(argv, output_fd));
	else if (ft_strncmp(argv[0], "pwd", 3) == 0)
		return (ft_pwd(argv, input_fd, output_fd));
	else if (ft_strncmp(argv[0], "cd", 2) == 0)
		return (ft_cd(argv, input_fd, output_fd));
	else if (ft_strncmp(argv[0], "export", 6) == 0)
		return (ft_export(argv, input_fd, output_fd));
	else if (ft_strncmp(argv[0], "unset", 5) == 0)
		return (ft_unset(argv, input_fd, output_fd));
	else if (ft_strncmp(argv[0], "env", 3) == 0)
		return (ft_env(argv, input_fd, output_fd));
	else if (ft_strncmp(argv[0], "exit", 4) == 0)
		return (close_minishell(0));
	else
	{
		errno = EINVAL;
		return (-1);
	}
}

void	exe(char *argv[], char *const envp[])
{
	char	**path_dirs;
	char	*path;
	size_t	path_length;


	execve(argv[0], argv, envp);
	path_dirs = ft_split(getenv("PATH"), ':');
	while (path_dirs)
	{
		path_length = ft_strlen(*path_dirs) + ft_strlen(argv[0]) + 2;
		path = ft_calloc(path_length, sizeof(char));
		ft_memcpy(path, *path_dirs, ft_strlen(*path_dirs));
		ft_memcpy(path + ft_strlen(*path_dirs),"/", 1);
		ft_memcpy(path + ft_strlen(*path_dirs) + 1, argv[0], ft_strlen(argv[0]));
		free(path);
		execve(path, argv, envp);
		path_dirs++;
	}
}

int	caller(t_command *command, int input_fd, int output_fd)
{
	pid_t		pid;
	int			cmd_ret;
	int			status;

	if (command->input != 0)
		input_fd = command->fd[0];
	if (command->output != 1)
		output_fd = command->fd[1];
	else if (!command->next)
		output_fd = 1;
	cmd_ret = command_call(command->argv, input_fd, output_fd);
	if (cmd_ret == -1 && errno == EINVAL)
	{
		pid = fork();
		termios(1);
		if (pid == 0)
		{
			if (command->prev || command->input || command->heredoc)
			{
				dup2(input_fd, STDIN_FILENO);
				close(input_fd);
			}
			if (command->next || command->output)
				dup2(output_fd, STDOUT_FILENO);
			exe(command->argv, command->envp);
		}
		//signal(SIGINT, NULL);
		//signal(SIGQUIT, NULL);
		waitpid(pid, &status, 0);
		//signal(SIGINT, sigs_handler);
		//signal(SIGQUIT, sigs_handler);
		termios(0);
		if (command->output)
			close(command->output);
		if (WIFSIGNALED(status))
			return (-1);
		if (!WIFEXITED(status))
			printf("Minishell: command not found: '%s'\n", command->argv[0]);
	}
	return (0);
}