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

#include "Observer.hpp"
#include "DisplayElement.hpp"
#include "WeatherData.hpp"

class StaticDisplay: public Observer, public DisplayElement
{
private:
    float maxTemp;
    float minTemp;
    float tempSum;
    int numReadings;
    WeatherData &weatherData;
public:
    StaticDisplay(WeatherData &weatherData) :
        maxTemp(0.0), minTemp(200.0), tempSum(0.0), numReadings(0), weatherData(weatherData)
    {
        weatherData.registerObserver(*this);
    }

    void update(float temperature, float humidity, float pressure) override
    {
        this->tempSum += temperature;
        this->numReadings++;

        if (temperature > this->maxTemp) {
            this->maxTemp = temperature;
        }

        if (temperature < this->minTemp) {
            this->minTemp = temperature;
        }

        display();
    }

    void display() const override
    {
        std::cout << "Avg/Max/Min temperature = " << (tempSum / numReadings)
            << "/" << maxTemp << "/" << minTemp << std::endl;
    }
};