#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/wait.h>
#include <string.h>

static pid_t engine_pid = 0;
static pid_t client_pid = 0;

static void cleanup(int sig) {
    (void)sig;
    if (engine_pid > 0) kill(engine_pid, SIGTERM);
    if (client_pid > 0) kill(client_pid, SIGTERM);
    while (wait(NULL) > 0);
    _exit(0);
}

int main(int argc, char *argv[]) {
    signal(SIGINT, cleanup);
    signal(SIGTERM, cleanup);

    engine_pid = fork();
    if (engine_pid == 0) {
        execl("./engine/looper", "looper", NULL);
        perror("execl engine");
        _exit(1);
    }

    client_pid = fork();
    if (client_pid == 0) {
        if (argc > 2 && strcmp(argv[1], "-s") == 0) {
            execl("./client/looper-client", "looper-client", "-s", argv[2], NULL);
        } else {
            execl("./client/looper-client", "looper-client", NULL);
        }
        perror("execl client");
        _exit(1);
    }

    int status;
    pid_t exited = wait(&status);
    if (exited == engine_pid) {
        kill(client_pid, SIGTERM);
        wait(NULL);
    } else if (exited == client_pid) {
        kill(engine_pid, SIGTERM);
        wait(NULL);
    }
    return 0;
}