#ifndef IO_H
#define IO_H
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/select.h>
#include <errno.h>

int *get_readable(int *fds)
{
    fd_set read_fds;
    static int readable[10];
    memset(readable, 0, sizeof(readable));
    FD_ZERO(&read_fds);
    int max_fd = -1;
    for (int i = 0; fds[i] != -1; i++)
    {
        FD_SET(fds[i], &read_fds);
        if (fds[i] > max_fd)
            max_fd = fds[i];
    }
    int ready = select(max_fd + 1, &read_fds, NULL, NULL, NULL);
    if (ready == -1)
    {
        perror("select");
        return readable;
    }
    int readable_index = 0;
    readable[readable_index] = -1;
    for (int i = 0; fds[i] != -1; i++)
    {
        if (FD_ISSET(fds[i], &read_fds))
        {
            readable[readable_index] = fds[i];
            readable_index++;
            readable[readable_index] = -1;
        }
    }

    return readable;
}

void msleep(uint time)
{
    usleep(time * 1000);
}

char *read_line(int fd, size_t limit)
{
    char *buffer = (char *)malloc(limit + 1);
    ssize_t length = read(fd, buffer, limit);
    if (length > 0)
    {
        buffer[length] = 0;
        return buffer;
    }
    else if (length == 0)
    {
        printf("Child process closed");
    }
    else
    {
        perror("read");
    }
    return NULL;
}
char *write_str(int fd, char *data)
{
    write(fd, data, strlen(data));
}

void type(int fd, char *text)
{
    while (*text)
    {
        char content[] = {*text, 0};
        write(fd, content, strlen(content));
        text++;
        msleep(100);
    }
}

#endif