/**
 * A Nugget.
 */
@Entity
@Table(name = "nugget")
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class Nugget implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequenceGenerator")
    @SequenceGenerator(name = "sequenceGenerator")
    private Long id;

    @Column(name = "name")
    private String name;

    @Column(name = "external_id")
    private String externalID;

    @Column(name = "url")
    private String url;

    @Column(name = "training_days")
    private Integer trainingDays;

    @Column(name = "cost_per_employee", precision = 21, scale = 2)
    private BigDecimal costPerEmployee;

    @Enumerated(EnumType.STRING)
    @Column(name = "category")
    private LearningCategory category;

    @Column(name = "created_at")
    private Instant createdAt;

    @Column(name = "updated_at")
    private Instant updatedAt;

    @ManyToOne
    @JsonIgnoreProperties("learningNuggets")
    private LearningPartner partner;

    @ManyToMany(mappedBy = "nuggets")
    @Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
    @JsonIgnore
    private Set<HalfYear> halfYears = new HashSet<>();
}

//------------------------------------------------------------------------------------//

/**
 * A HalfYear.
 */
@Entity
@Table(name = "half_year")
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class HalfYear implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequenceGenerator")
    @SequenceGenerator(name = "sequenceGenerator")
    private Long id;

    @Column(name = "number")
    private Integer number;

    @Enumerated(EnumType.STRING)
    @Column(name = "status")
    private HalfYearStatus status;

    @Column(name = "created_at")
    private Instant createdAt;

    @Column(name = "updated_at")
    private Instant updatedAt;

    @ManyToMany
    @Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
    @JoinTable(name = "half_year_employees",
               joinColumns = @JoinColumn(name = "half_year_id", referencedColumnName = "id"),
               inverseJoinColumns = @JoinColumn(name = "employees_id", referencedColumnName = "id"))
    private Set<Employee> employees = new HashSet<>();

    @ManyToMany
    @Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
    @JoinTable(name = "half_year_nuggets",
               joinColumns = @JoinColumn(name = "half_year_id", referencedColumnName = "id"),
               inverseJoinColumns = @JoinColumn(name = "nuggets_id", referencedColumnName = "id"))
    @OrderColumn(name = "NUGGET_ORDER")
    private Set<Nugget> nuggets = new HashSet<>();

    @ManyToOne
    @JsonIgnoreProperties("halfYears")
    private Company company;
}