#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>

#include <tabby/link.h>
#include <tabby/printer.h>

static void usage(int argc, char **argv, char *message, ...) {
    if (message) {
        va_list args;

        va_start(args, message);
        vfprintf(stderr, message, args);
         fprintf(stderr, "\n");
        va_end(args);
    }

    fprintf(stderr, "usage: %s device\n", argv[0]);

    exit(1);
}

int main(int argc, char **argv) {
    int fd, status;

    tabby_printer_packet_header header;

    uint16_t checksum;

    uint8_t body[TABBY_PRINTER_MAX_PACKET_SIZE];

    if (argc != 2) {
        usage(argc, argv, "No device specified");
    }

    if ((fd = tabby_link_open(argv[1])) < 0) {
        fprintf(stderr, "%s: %s: %s: %s\n", argv[0], "tabby_link_open()",
            argv[1], strerror(errno));

        goto error_link_open;
    }

    while (1) {
        uint8_t value;

        status = tabby_printer_packet_recv(fd, &header, &body, &checksum);

        if (status < 0) {
            fprintf(stderr, "%s: %s: %s\n",
                argv[0], "tabby_printer_packet_recv()", strerror(errno));

            continue;
        }
    }

    tabby_link_close(fd);

    return 0;

error_link_send:
    tabby_link_close(fd);

error_link_open:
    return 1;
}