#include <signal.h>             /* signal */
#include <stdio.h>              /* fprintf */
#include <stdlib.h>             /* exit */
#include <string.h>             /* memset */

#include "libircclient.h"

#include "threads.h"            /* F_* */

extern irc_session_t *irc_session;

const char signal_fmt[] = "Received %s, exiting.\n";
const char signal_unknown_fmt[] = "(Unknown Signal)";

static void SignalHandler(int sig) {
    char buf[512];
    const char *s = signal_unknown_fmt;
#define CASE(x) case x: s = #x; break
    switch (sig) {
        CASE(SIGTERM);
        CASE(SIGINT);
#ifndef _WIN32
        CASE(SIGQUIT);
        CASE(SIGKILL);
        CASE(SIGHUP);
#endif
    default:
        break;
    }
#undef CASE

    memset(&buf, 0, sizeof buf);
    snprintf(buf, (sizeof buf) - 1, signal_fmt, s);
    fprintf(stderr, "%s", buf);

    F_IRC_THREAD = STOPPED;
    F_MAIN_THREAD = STOPPED;
    F_SPAM_THREADS = STOPPED;

    if (NULL != irc_session)
        irc_cmd_quit(irc_session, buf);

    /* TODO: clean exit */
}

void install_signal_handler(void) {
    signal(SIGTERM, SignalHandler);
    signal(SIGINT, SignalHandler);
#ifndef _WIN32
    signal(SIGQUIT, SignalHandler);
    signal(SIGKILL, SignalHandler);
    signal(SIGHUP, SignalHandler);
#endif
}