package book.stock;

import java.math.BigDecimal;

import foundation.data.entity.Entity;
import foundation.util.Util;

public class QtyCommand {

	private boolean doNothing;
	private BigDecimal addOperator;
	private BigDecimal deleteOperator;
	private BigDecimal freezeOperator;
	private BigDecimal unfreezeOperator;
	
	
	public QtyCommand() {
		doNothing = true;
	}
	
	public void load(Entity entity) {
		addOperator = parseOneValue(entity.getString("qty_add"));
		deleteOperator = parseOneValue(entity.getString("qty_delete"));
		freezeOperator = parseOneValue(entity.getString("qty_freeze"));
		unfreezeOperator = parseOneValue(entity.getString("qty_unfreeze"));
		
		doNothing = (addOperator == null) && (deleteOperator == null) && (freezeOperator == null) && (unfreezeOperator == null);
	}

	private BigDecimal parseOneValue(String value) {
		if (Util.isEmpty(value)) {
			return null;
		}
		
		if ("-".equalsIgnoreCase(value)) {
			return BigDecimal.valueOf(-1);
		}
		
		return BigDecimal.valueOf(1);
	}

	public boolean isDoNothing() {
		return doNothing;
	}

	public boolean isSetAdd() {
		return addOperator != null;
	}

	public boolean isSetDelete() {
		return deleteOperator != null;
	}

	public boolean isSetFreeze() {
		return freezeOperator != null;
	}

	public boolean isSetUnfreeze() {
		return unfreezeOperator != null;
	}

	public BigDecimal getAddOperator() {
		return addOperator;
	}

	public BigDecimal getDeleteOperator() {
		return deleteOperator;
	}

	public BigDecimal getFreezeOperator() {
		return freezeOperator;
	}

	public BigDecimal getUnfreezeOperator() {
		return unfreezeOperator;
	}
	
}