#pragma once

#include "helper.h"

typedef void (*remaining_callback_t)(int8);
struct : public CallbackAware<remaining_callback_t> {

    void operator=(int8 value) {
        initial = remaining = value;
    }

    operator int8() {
        return remaining;
    }

    void start() {
        remaining = initial + 1;
    }

    void decrease() {
        remaining--;
        if (callback) callback(remaining);
    }

    bool atBeginning() {
        return initial == remaining;
    }

private:
    int8 initial = 0, remaining = 0;
} timer;