package com.marcosholgado.daggerplayground;


import android.app.Activity;
import android.os.Bundle;

public class PresenterExample {

    public interface View {}

    public interface Presenter<V extends View> {
        void attachView(V view);
        void detachView();
    }

    public class BasePresenter<V extends View> implements Presenter<V> {

        V view;

        public void attachView(V view) {
            this.view = view;
        }

        public void detachView() {
            this.view = null;
        }
    }

    // KONKRETNE WIDOKI I PRESENTERY

    public interface ViewA extends View {}

    public interface PresenterA extends Presenter<ViewA> {
        void whatever();
    }

    public class PresenterAImpl extends BasePresenter<ViewA> implements PresenterA  {
        @Override
        public void whatever() {
            //do nothing
        }
    }

    // ACTIVITY BAZOWE (Z GENERYKIEM)

    public abstract class BaseActivity<P extends Presenter> extends Activity implements View {
        protected P presenter;


        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            this.presenter.attachView(this); // możesz wołać metody z bazowego interfejsu
        }

        @Override
        protected void onDestroy() {
            this.presenter.detachView();
            super.onDestroy();
        }
    }

    // Konkretne activity które rozszerza bazowe

    public class ActivityA extends BaseActivity<PresenterA> {
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            this.presenter = new PresenterAImpl(); // tu tworzysz konkretny presenter
            super.onCreate(savedInstanceState);
            presenter.whatever(); // możesz zawołać, bo wiesz, że `onAttach` już się wywował w base
        }
    }

}