FormMasterDetail

package org.echipe.form;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.event.ActionEvent;
import javax.faces.model.DataModel;
import javax.faces.model.ListDataModel;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

import org.echipe.model.Campionat;
import org.echipe.model.Echipa;

@ManagedBean @SessionScoped
public class FormMasterDetail {

    private Campionat campionat;
    private List<Campionat> campionate = new ArrayList<>();

    private DataModel<Echipa> echipeDataModel;
    private List<Echipa> echipe = new ArrayList<>();
    public DataModel<Echipa> getEchipeDataModel() {
        Collections.sort(this.campionat.getEchipe(), (e1, e2)->-e1.getPuncte().compareTo(e2.getPuncte()));
        echipeDataModel = new ListDataModel<Echipa>(this.campionat.getEchipe());
        return echipeDataModel;
    }
    public void setEchipeDataModel(DataModel<Echipa> echipeDataModel) {
        this.echipeDataModel = echipeDataModel;
    }
    private EntityManager em;
    private int idCampionat;

    public FormMasterDetail() {
        super();
        EntityManagerFactory emf = Persistence.createEntityManagerFactory("ProiectJPA");
        em = emf.createEntityManager();
        initializareModelCampionate();
        initializareModelEchipe();
    }
    private void initializareModelCampionate(){
        this.campionate = em.createQuery("SELECT c FROM Campionat c", Campionat.class).getResultList();
        if(this.campionate != null) {
            Collections.sort(this.campionate, (c1, c2)->c1.getNumeCampionat().compareTo(c2.getNumeCampionat()));
            if(!this.campionate.contains(campionat)) {
                this.campionat = campionate.get(0);
            }
            if(this.campionat == null) {
                adaugareCampionat(null);
            }
        }
    }

    private void initializareModelEchipe() {
        this.echipe = em.createQuery("SELECT e FROM Echipa e", Echipa.class).getResultList();
        if(this.echipe != null) {
            Collections.sort(this.campionat.getEchipe(), (e1, e2)->-e1.getPuncte().compareTo(e2.getPuncte()));
        }
    }

    public Campionat getCampionat() {
        return campionat;
    }
    public void setCampionat(Campionat campionat) {
        this.campionat = campionat;
    }
    public List<Campionat> getCampionate() {
        return campionate;
    }
    public void setCampionate(List<Campionat> campionate) {
        this.campionate = campionate;
    }
    public Integer getIdCampionat() {
        return this.campionat.getIdCampionat();
    }

    public void setIdCampionat(Integer id) {
        Integer idx = this.campionate.indexOf(new Campionat(id, null));
        this.campionat = campionate.get(idx);
    }

    public Echipa getEchipa() {
        return this.echipeDataModel.getRowData();
    }

    public void nextCampionat(ActionEvent event) {
        idCampionat  = this.campionate.indexOf(campionat);
        if((idCampionat + 1) < this.campionate.size()) {
            System.out.println(">>> Campionatul urmator " + (idCampionat+1));
            this.campionat = this.campionate.get(idCampionat+1);
        }
    }

    public void previousCampionat(ActionEvent event) {
        idCampionat = this.campionate.indexOf(campionat);
        if(idCampionat > 0) {
            System.out.println("<<< Campionatul anterior " + (idCampionat-1));
            this.campionat = this.campionate.get(idCampionat-1);
        }
    }

    public void adaugareCampionat(ActionEvent event) {
        this.campionat = new Campionat();
        campionat.setIdCampionat(campionate.get(campionate.size()-1).getIdCampionat() + 1);
        campionat.setNumeCampionat("Campionat nou - Introduceti numele");
        this.campionate.add(campionat);
        System.out.println("Campionat adaugat (local) cu succes!");
    }

    public void salvareCampionat(ActionEvent event) {
        try {
            this.em.getTransaction().begin();
            this.em.merge(this.campionat);
            this.em.getTransaction().commit();
            System.out.println("Campionatul a fost salvat in BD cu succes!");
        } catch(Exception e) {
            e.getSuppressed();
            System.out.println("Eroare la salvarea campionatului in BD :(");
        }
    }

    public void stergereCampionat(ActionEvent event) {
        this.campionate.remove(this.campionat);
        if(this.em.contains(this.campionat)) {
            this.em.getTransaction().begin();
            this.em.remove(this.campionat);
            this.em.getTransaction().commit();
            System.out.println("Campionatul a fost sters din BD!");
        }
        if(!this.campionate.isEmpty()) {
            this.campionat = this.campionate.get(0);
        } else {
            this.campionat = null;
        }
    }

    public void abandonareCampionat(ActionEvent event) {
        System.out.println("Campionat abandonat");
        em.clear();
        initializareModelCampionate();
    }

    public void stergereEchipa(ActionEvent event) {
        Echipa echipa = this.echipeDataModel.getRowData();
        this.campionat.getEchipe().remove(echipa);
        this.em.getTransaction().begin();
        this.em.remove(echipa);
        this.em.getTransaction().commit();
    }

    public void adaugareEchipa(ActionEvent event) {
        Echipa echipa = new Echipa(null, "Echipa noua", 2020, this.campionat);
        echipa.setGoluriMarcate(100);
        echipa.setGoluriPrimite(30);
        echipa.setPuncte(70);
        this.campionat.getEchipe().add(echipa);
        this.em.getTransaction().begin();
        this.em.persist(echipa);
        this.em.getTransaction().commit();

    }
}