#include <libcbd.h>

#include <cbdutil.h>

uint verbose_level;

void __attribute__((noreturn))
error(const char* fmt, ...)
{
    va_list ap;

    va_start(ap, fmt);
    vfprintf(stderr, fmt, ap);
    exit(EXIT_FAILURE);
}

int
verbose(uint level, const char* fmt, ...)
{
    int ret = 0;
    va_list ap;

    if (verbose_level >= level) {
        va_start(ap, fmt);
        vprintf(fmt, ap);
    }

    return ret;
}

bool
ask_user_bool(tristate_t auto_response, const char* fmt, ...)
{
    va_list ap;
    char prompt[256];
    char* line;
    size_t len;
    int ret;
    bool answer;

    va_start(ap, fmt);
    vsnprintf(prompt, sizeof(prompt), fmt, ap);
    va_end(ap);
again:
    printf("%s [y/n]? ", prompt);
    if (auto_response != t_none) {
        answer = (auto_response == t_true);
        printf("%s\n", (answer ? "y" : "n"));
        return answer;
    }
    line = NULL;
    len = 0;
    getline(&line, &len, stdin);
    if (ret > 0) {
        switch (line[0]) {
        case 'y':
        case 'Y':
            answer = true;
            break;
        case 'n':
        case 'N':
            answer = false;
            break;
        default:
            ret = -1;
        }
    }
    free(line);
    if (ret <= 0) {
        goto again;
    }

    return answer;
}