/*
 * WeatherData.hpp
 *
 *  Created on: 31 окт. 2021 г.
 *      Author: alexander
 */

#pragma once

#include "Subject.hpp"
#include <list>
#include <functional>
#include <iostream>

class WeatherData: public Subject
{
private:
    std::list<std::reference_wrapper<Observer>> observers;
    float temperature;
    float humidity;
    float pressure;
public:
    void registerObserver(Observer &o) override
    {
        observers.push_back(o);
    }

    void removeObserver(Observer &o) override
    {
        observers.erase(std::find_if(observers.cbegin(), observers.cend(), [&](const std::reference_wrapper<Observer> &item)
        {
            return &item.get() == &o;
        }));
        std::cout << "Осталось в листе: " << observers.size() << " элементов" << std::endl;
    }

    void notifyObservers() override
    {
        for (Observer &observer : observers)
        {
            observer.update(temperature, humidity, pressure);
        }
    }

    void measurementsChanged()
    {
        notifyObservers();
    }

    void setMeasurements(float temperature, float humidity, float pressure)
    {
        this->temperature = temperature;
        this->humidity = humidity;
        this->pressure = pressure;
        measurementsChanged();
    }

    float getTemperature()
    {
        return temperature;
    }

    float getHumidity()
    {
        return humidity;
    }

    float getPressure()
    {
        return pressure;
    }
};