package com.company;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.util.ArrayList;
import java.util.List;

public class RepositoryObservable {
    private List<Integer> products = new ArrayList<>(10);
    private List<ConsumerObserver> consumers = new ArrayList<>();
    private List<ManufacturerObserver> manufacturers = new ArrayList<>();

    private PropertyChangeSupport notify;

    public RepositoryObservable(){
        notify = new PropertyChangeSupport(this);
    }

    public void addPropertyChangeListener(PropertyChangeListener propertyChangeListener){
        notify.addPropertyChangeListener(propertyChangeListener);
    }

    public void addConsumer(ConsumerObserver consumer){
        consumers.add(consumer);
    }

    public void addManufacturer(ManufacturerObserver manufacturer){
        manufacturers.add(manufacturer);
    }

    public List<Integer> getProducts() {
        return products;
    }

    public void addProduct(int id){
        if(products.size() < 10){
            products.add(id);
        }
    }

    public boolean hasSpace(){
        boolean state = products.size() < 10;
        notify.firePropertyChange("hasSpace", false, state);
        return state;
    }

    public boolean hasProducts(){
        boolean state = !products.isEmpty();
        notify.firePropertyChange("hasProducts", false, state);
        return state;
    }
}