#include <gpiod.h>
#include <stdio.h>
#include <errno.h>

#define GPIO 12

int main(int argc, char *argv[])
{
    struct gpiod_chip* chip = gpiod_chip_open("/dev/gpiochip4");
    if (chip == NULL)
    {
        perror("gpiod_chip_open");
        return 1;
    }

    struct gpiod_line_settings* lineSettings = gpiod_line_settings_new();
    if (lineSettings == NULL)
    {
        perror("gpiod_line_settings_new");
        return 1;
    }

    gpiod_line_settings_set_direction(lineSettings, GPIOD_LINE_DIRECTION_INPUT);

    struct gpiod_line_config* lineConfig = gpiod_line_config_new();
    if (lineConfig == NULL)
    {
        perror("gpiod_line_config_new");
        return 1;
    }

    int gpios[] = { GPIO };
    gpiod_line_config_add_line_settings(lineConfig, gpios, 1, lineSettings);

    struct gpiod_request_config* requestConfig = gpiod_request_config_new();
    if (requestConfig == NULL)
    {
        perror("gpiod_request_config_new");
        return 1;
    }
    gpiod_request_config_set_consumer(requestConfig, "me");

    struct gpiod_line_request* request = gpiod_chip_request_lines(chip, requestConfig, lineConfig);
    if (request == NULL)
    {
        perror("gpiod_chip_request_lines");
        return 1;
    }

    enum gpiod_line_value value = gpiod_line_request_get_value(request, GPIO);

    printf("GPIO %d is %d\n", GPIO, value);

    gpiod_line_request_release(request);
    gpiod_request_config_free(requestConfig);
    gpiod_line_config_free(lineConfig);
    gpiod_line_settings_free(lineSettings);
    gpiod_chip_close(chip);

    return 0;
}