#include "sampler_task.h"
#include "ringbuf.h"
#include "ds18b20.h"   // добавим

extern "C" {
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_timer.h"
}

// буфер
static ringbuf_t rb;

ringbuf_t* sampler_get_buffer()
{
    return &rb;
}

static TaskHandle_t sampler_task_handle = nullptr;

static void sampler_task(void* arg)
{
    const TickType_t period = pdMS_TO_TICKS(6000);
    TickType_t last_wake = xTaskGetTickCount();

    while (1)
    {
        int64_t now_ms = esp_timer_get_time() / 1000;

        float temp = ds18b20_read();
        ringbuf_push(&rb, now_ms, (int)(temp * 100));

        vTaskDelayUntil(&last_wake, period); // 6 секунд
    }
}

void sampler_task_start()
{
    if (sampler_task_handle == nullptr)
    {
        ringbuf_init(&rb);
        ds18b20_init(GPIO_NUM_27); // новый драйвер

        xTaskCreate(
            sampler_task,
            "sampler",
            4096,
            nullptr,
            5,
            &sampler_task_handle
        );
    }
}

void sampler_task_stop()
{
    if (sampler_task_handle != nullptr)
    {
        vTaskDelete(sampler_task_handle);
        sampler_task_handle = nullptr;
    }
}