#ifndef GAME_TIMER_HPP
#define GAME_TIMER_HPP

#include "freertos/FreeRTOS.h"

#include "sseg.hpp"

static bool playing;
static uint32_t time_left;

static void game_timer_task(void *arg);
uint32_t sat_sub(uint32_t x, uint32_t y);

void start_timer(void) {
    playing = true;
}

void stop_timer(void) {
    playing = false;
}

void init_game_timer(void) {
    xTaskCreate(game_timer_task, "game_timer", 4096, NULL, 10, NULL);
}

void set_game_time(uint32_t new_time) {
    time_left = new_time;
}

uint32_t get_game_time() {
    return time_left;
}

static void game_timer_task(void *arg)
{
    TickType_t lastWakeTime = xTaskGetTickCount();

    const uint32_t frequency = 100;
    while (1) {
        vTaskDelayUntil( &lastWakeTime, pdMS_TO_TICKS(frequency));
        if (playing) {
            time_left = sat_sub(time_left, frequency);
            set_game_timer(time_left / 100, 1);
        }
    }

    vTaskDelete(NULL);
}

uint32_t sat_sub(uint32_t x, uint32_t y)
{
    uint32_t res = x - y;
    res &= -(res <= x);
    return res;
}

#endif /* GAME_TIMER_HPP */