// Author:  Paul Oliver <contact@pauloliver.dev>
// Project: Salis

// Lightweight UI for the Salis simulator with minimal output.
// Can be interrupted through OS signals.
// Ideal for running Salis in the background.

volatile bool g_running;
uint64_t      g_step_block;

void info_impl(const char *restrict fmt, ...) {
    assert(fmt);
    printf("\033[1;34mINFO:\033[0m ");

    va_list args;
    va_start(args, fmt);
    vprintf(fmt, args);
    va_end(args);

    printf("\n");
}

void warn_impl(const char *restrict fmt, ...) {
    assert(fmt);
    printf("\033[1;31mWARN:\033[0m ");

    va_list args;
    va_start(args, fmt);
    vprintf(fmt, args);
    va_end(args);

    printf("\n");
}

void sig_handler(int signo) {
    (void)signo;

    if (g_running) {
        g_warn("Signal received, will stop simulator soon...");
        g_running = false;
    }
}

void step_block() {
    clock_t beg = clock();
    salis_step(g_step_block - (g_steps % g_step_block));
    clock_t end = clock();

    if ((end - beg) < (CLOCKS_PER_SEC * 4)) {
        g_step_block <<= 1;
    }

    if ((end - beg) >= (CLOCKS_PER_SEC * 2) && g_step_block != 1) {
        g_step_block >>= 1;
    }

    g_info("Simulator running on step '%#lx'", g_steps);
}

int main() {
    g_info = info_impl;
    g_warn = warn_impl;

    {% if args.command == "new" %}
    salis_init();
    {% elif args.command == "load" %}
    salis_load();
    {% endif %}

    g_running    = true;
    g_step_block = 1;

    signal(SIGINT,  sig_handler);
    signal(SIGTERM, sig_handler);

    while (g_running) {
        step_block();
    }

    g_info("Saving simulation...");
    salis_save("{{ sim_path }}");
    salis_free();

    g_info("Exiting salis...");
    return 0;
}