package auction.model;

import javax.persistence.*;
import java.util.Date;

/**
 * Escrow base class for CaveatEmptor.
 *
 * A particular shipment under supervision, from a seller to a buyer.
 * <p>
 * The process (see <tt>ShipmentState</tt>) is supposed to be:
 * <li>AGREED: Both parties agree on the deal and a Shipment is created
 * <li>PAYED: The buyer payed the shipment
 * <li>IN_TRANSIT: The seller sent the shipment
 * <li>ACCEPTED: The buyer accepted the shipment in the inspection period
 * <li>COMPLETE: The payment has been transfered to the seller
 * <p>
 * The escrow service may be in the context of an auction, or utilized
 * by all users for deals made outside of CaveatEmptor. Hence, the
 * auction <tt>Item</tt> reference is optional and may be null.
 *
 * @author Christian Bauer
 */
@Entity
@Table(name = "SHIPMENT")
@SecondaryTable(
    name = "ITEM_SHIPMENT",
    pkJoinColumns = @PrimaryKeyJoinColumn(name = "SHIPMENT_ID")
)
// TODO: Can't declare foreign key constraint name for PK join column
public class Shipment {

    @Id @GeneratedValue
    @Column(name = "SHIPMENT_ID")
    private Long id = null;

    @Version
    @Column(name = "OBJ_VERSION")
    private int version = 0;

    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name="DELIVERY_ADDRESS_ID", nullable = false, updatable = false)
    @org.hibernate.annotations.Fetch(org.hibernate.annotations.FetchMode.JOIN)
    @org.hibernate.annotations.ForeignKey(name = "FK_SHIPMENT_DELIVERY_ADDRESS_ID")
    private AddressEntity deliveryAddress;

    @ManyToOne
    @JoinColumn(table = "ITEM_SHIPMENT", name = "ITEM_ID")
    @org.hibernate.annotations.ForeignKey(
        name = "FK_ITEM_SHIPMENT_ITEM_ID",
        inverseName = "FK_ITEM_SHIPMENT_SHIPMENT_ID"
    )
    private Item auction; // Nullable

    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name="BUYER_ID", nullable = false, updatable = false)
    @org.hibernate.annotations.Fetch(org.hibernate.annotations.FetchMode.JOIN)
    @org.hibernate.annotations.ForeignKey(name = "FK_SHIPMENT_BUYER_ID")
    private User buyer;

    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name="SELLER_ID", nullable = false, updatable = false)
    @org.hibernate.annotations.Fetch(org.hibernate.annotations.FetchMode.JOIN)
    @org.hibernate.annotations.ForeignKey(name = "FK_SHIPMENT_SELLER_ID")
    private User seller;

    @Column(name="INSPECTION_PERIOD_DAYS", nullable = false, updatable = false)
    private int inspectionPeriodDays;

    @Enumerated(EnumType.STRING)
    @Column(name = "SHIPMENT_STATE", nullable = false)
    private ShipmentState state = ShipmentState.AGREED;

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name="CREATED", nullable = false, updatable = false)
    private Date created = new Date();

    /**
     * No-arg constructor for JavaBean tools
     */
    public Shipment() {}

    /**
     * Regular constructor
     */
    public Shipment(AddressEntity deliveryAddress, User buyer, User seller, int inspectionPeriodDays) {
        this.deliveryAddress = deliveryAddress;
        this.buyer = buyer;
        this.seller = seller;
        this.inspectionPeriodDays = inspectionPeriodDays;
    }

    // ********************** Accessor Methods ********************** //

    public Long getId() { return id; }
    public int getVersion() { return version; }

    public AddressEntity getDeliveryAddress() { return deliveryAddress; }

    public Item getAuction() { return auction; }
    public void setAuction(Item auction) { this.auction = auction; }

    public User getSeller() { return seller; }

    public User getBuyer() { return buyer; }

    public int getInspectionPeriodDays() { return inspectionPeriodDays; }

    public ShipmentState getState() { return state; }
    public void setState(ShipmentState state) { this.state = state; }

    public Date getCreated() { return created; }

    // ********************** Common Methods ********************** //

    public boolean equals(Object o) {
        if (this == o) return true;
        if (!(o instanceof Shipment)) return false;

        final Shipment shipment = (Shipment) o;

        if (inspectionPeriodDays != shipment.inspectionPeriodDays) return false;
        if (!buyer.getId().equals(shipment.buyer.getId())) return false;
        if (!created.equals(shipment.created)) return false;
        return seller.getId().equals(shipment.seller.getId());

    }

    public int hashCode() {
        int result;
        result = seller.getId().hashCode();
        result = 29 * result + buyer.getId().hashCode();
        result = 29 * result + inspectionPeriodDays;
        result = 29 * result + created.hashCode();
        return result;
    }

    public String toString() {
        return  "Shipment ('" + getId() + "'), " +
                "State: '" + getState() + "'";
    }

    // ********************** Business Methods ********************** //

}