package com.ejb3unit;

import java.util.ArrayList;
import java.util.Collection;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;

import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;

/**
 * Test entity bean with annotated methods. Represents a purchase order.
 * 
 * @author Daniel Wiese
 * 
 */
@Entity
@Table(name = "PURCHASE_ORDER")
public class Order implements java.io.Serializable {

    private static final long serialVersionUID = 1L;

    private int id;

    private double total;

    private Collection<LineItem> lineItems;

    /**
     * The pk.
     * 
     * @return - the pk
     */
    @Id
    @GeneratedValue
    public int getId() {
        return id;
    }

    /**
     * Return the id.
     * 
     * @param id -
     *            the id
     */
    public void setId(int id) {
        this.id = id;
    }

    /**
     * The total.
     * 
     * @return - the total
     */
    public double getTotal() {
        return total;
    }

    /**
     * Set the total.
     * 
     * @param total -
     *            total
     */
    public void setTotal(double total) {
        this.total = total;
    }

    /**
     * Adds a line item.
     * 
     * @param product -
     *            the product
     * @param quantity -
     *            the quantity
     * @param price -
     *            the price
     */
    public void addPurchase(String product, int quantity, double price) {
        if (lineItems == null) {
            lineItems = new ArrayList<LineItem>();
        }

        LineItem item = new LineItem();
        item.setOrder(this);
        item.setProduct(product);
        item.setQuantity(quantity);
        item.setSubtotal(quantity * price);
        lineItems.add(item);
        total += quantity * price;
    }

    /**
     * The line items.
     * 
     * @return - the line items
     */
    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "order")
    public Collection<LineItem> getLineItems() {
        return lineItems;
    }

    /**
     * Sets the line items.
     * 
     * @param lineItems -
     *            die libne items
     */
    public void setLineItems(Collection<LineItem> lineItems) {
        this.lineItems = lineItems;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean equals(Object other) {
        if (other != null && other instanceof Order) {
            final Order otherC = (Order) other;
            final EqualsBuilder builder = new EqualsBuilder();
            builder.append(this.total, otherC.total);
            builder.append(this.id, otherC.id);
            // line items are not ordered
            // builder.append(this.lineItems, otherC.lineItems);
            return builder.isEquals();
        }
        return false;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public int hashCode() {
        final HashCodeBuilder builder = new HashCodeBuilder();
        builder.append(this.total);
        builder.append(this.id);
        // builder.append(this.lineItems);
        return builder.toHashCode();
    }
}