package org.msh.tb.entities;

import org.hibernate.validator.Length;
import org.hibernate.validator.NotNull;
import org.msh.tb.entities.enums.MovementType;

import javax.persistence.*;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * Stores information about a medicine transaction
 * @author Ricardo Memoria
 *
 */
@Entity
@Table(name="movement")
public class Movement implements Serializable {
	private static final long serialVersionUID = 3238105346061740436L;

	@Id
	@GeneratedValue(strategy=GenerationType.AUTO)
	private Integer id;

	@Temporal(TemporalType.DATE)
	@Column(name="mov_date")
	@NotNull
	private Date date;
	
	private int quantity;
	private int oper;
	
	private float totalPrice;

	private MovementType type;
	
	@ManyToOne
	@JoinColumn(name="MEDICINE_ID")
	@NotNull
	private Medicine medicine;
	
	@ManyToOne
	@JoinColumn(name="UNIT_ID")
	@NotNull
	private Tbunit tbunit;
	
	@ManyToOne
	@JoinColumn(name="SOURCE_ID")
	@NotNull
	private Source source;

	@Temporal(TemporalType.TIMESTAMP)
	@NotNull
	private Date recordDate;

	@Length(max=250)
	private String comment;
	
	@OneToMany(cascade={CascadeType.ALL}, mappedBy="movement")
	private List<BatchMovement> batches = new ArrayList<BatchMovement>();

	@ManyToOne(fetch=FetchType.LAZY)
	@JoinColumn(name="ADJUSTMENT_ID")
	private FieldValue adjustmentType;


    /**
     * The available quantity in the inventory
     */
    private int availableQuantity;

    /**
     * The total price of the inventory
     */
    private float totalPriceInventory;


    public float getTotalPriceInventory() {
        return totalPriceInventory;
    }

    public void setTotalPriceInventory(float totalPriceInventory) {
        this.totalPriceInventory = totalPriceInventory;
    }

    public int getAvailableQuantity() {
        return availableQuantity;
    }

    public void setAvailableQuantity(int availableQuantity) {
        this.availableQuantity = availableQuantity;
    }

    /**
	 * Returns adjustment type of the transaction
	 * @return a FieldValue representing the adjustment type
	 */
	public FieldValue getAdjustmentType() {
		return adjustmentType;
	}

	public void setAdjustmentType(FieldValue adjustmentType) {
		this.adjustmentType = adjustmentType;
	}
	
	/**
	 * Returns the unit price of the transaction
	 * @return float number representing the unit price
	 */
	public float getUnitPrice() {
		return quantity != 0? totalPrice / quantity : 0;
	}
	
	/**
	 * Returns the signed quantity of medicine to be added to the stock position  
	 * @return signed quantity of medicine for the transaction
	 */
	public int getQtdOperation() {
		return oper * quantity;
	}

	/**
	 * Returns the remark of the transaction
	 * @return String containing the remarks of the transaction
	 */
	public String getComment() {
		return comment;
	}

	/**
	 * Changes the remark of the transaction
	 * @param comment - the new remark of the transaction
	 */
	public void setComment(String comment) {
		this.comment = comment;
	}

	/**
	 * Returns the date of the transaction
	 * @return instance of the Date class
	 */
	public Date getDate() {
		return date;
	}

	/**
	 * Changes the date of the transaction
	 * @param date to be changed
	 */
	public void setDate(Date date) {
		this.date = date;
	}

	/**
	 * Returns the unique id of the transaction
	 * @return Integer instance representing the id of the transaction
	 */
	public Integer getId() {
		return id;
	}

	
	/**
	 * Changes the id of the transaction
	 * @param id to be changed
	 */
	public void setId(Integer id) {
		this.id = id;
	}

	/**
	 * Returns the medicine of the transaction
	 * @return instance of the Medicine class
	 */
	public Medicine getMedicine() {
		return medicine;
	}

	/**
	 * Changes the medicine of the transaction
	 * @param medicine - new medicine of the transaction 
	 */
	public void setMedicine(Medicine medicine) {
		this.medicine = medicine;
	}

	/**
	 * Returns the quantity of medicine of the transaction
	 * @return quantity of medicine
	 */
	public int getQuantity() {
		return quantity;
	}

	/**
	 * Changes the quantity of the transaction
	 * @param quantity - the new quantity
	 */
	public void setQuantity(int quantity) {
		this.quantity = quantity;
	}

	/**
	 * Returns the source of the transaction
	 * @return instance of the Source class 
	 */
	public Source getSource() {
		return source;
	}

	/**
	 * Changes the source of the transaction
	 * @param source - the new source of the transaction
	 */
	public void setSource(Source source) {
		this.source = source;
	}

	/**
	 * Returns the TB unit of the transaction
	 * @return instance of Tbunit class
	 */
	public Tbunit getTbunit() {
		return tbunit;
	}

	/**
	 * Changes the TB unit of the transaction
	 * @param tbunit - the new TB Unit
	 */
	public void setTbunit(Tbunit tbunit) {
		this.tbunit = tbunit;
	}

	/**
	 * Returns the type of the transaction
	 * @return MovementType instance
	 */
	public MovementType getType() {
		return type;
	}

	/**
	 * Changes the type of the transaction
	 * @param type - new type of movement
	 */
	public void setType(MovementType type) {
		this.type = type;
	}

	/**
	 * Returns the date and time that the transaction was generated
	 * @return Date instance
	 */
	public Date getRecordDate() {
		return recordDate;
	}

	/**
	 * Changes the date and time the record was generated
	 * @param recordDate - the new record date
	 */
	public void setRecordDate(Date recordDate) {
		this.recordDate = recordDate;
	}

	/**
	 * Returns the operation of the transaction
	 * @return +1 if the transaction is including medicine into the stock, -1 if the transaction is removing medicine from the stock 
	 */
	public int getOper() {
		return oper;
	}

	/**
	 * Changes the operation of the transaction
	 * @param oper - the operation of the transaction (+1 or -1)
	 */
	public void setOper(int oper) {
		this.oper = oper;
	}

	/**
	 * Returns the batches movements involved in this transaction
	 * @return the list of instances of BachMovement class 
	 */
	public List<BatchMovement> getBatches() {
		return batches;
	}

	/**
	 * Changes the batches involved in the transaction
	 * @param batches - the list of BachMovement objects of the transaction
	 */
	public void setBatches(List<BatchMovement> batches) {
		this.batches = batches;
	}

	/**
	 * @return the totalPrice
	 */
	public float getTotalPrice() {
		return totalPrice;
	}

	/**
	 * @param totalPrice the totalPrice to set
	 */
	public void setTotalPrice(float totalPrice) {
		this.totalPrice = totalPrice;
	}
	
	public boolean isAdjustment() {
		if(this.type != null)
			return type.equals(MovementType.ADJUSTMENT);
		else
			return false;
	}
	
	public boolean isDispensing() {
		if(this.type != null)
			return type.equals(MovementType.DISPENSING);
		else
			return false;
	}

}