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package nz.co.senanque.functions;

import java.io.Serializable;
import java.util.Date;
import nz.co.senanque.base.Invoice;
import nz.co.senanque.rules.FieldReference;
import nz.co.senanque.rules.Operations;
import nz.co.senanque.rules.Rule;
import nz.co.senanque.rules.RuleContext;
import nz.co.senanque.rules.RuleProxyField;
import nz.co.senanque.rules.RuleSession;
import nz.co.senanque.rules.UnKnownFieldValueException;
import nz.co.senanque.validationengine.ValidationObject;
import org.springframework.stereotype.Component;


/**
 * formula:Invoice invoice days
 * {
 * days=daysSince((date);}
 * 
 */
@Component("nz.co.senanque.functions.R2")
public class R2
    implements Serializable, Rule
{

    private final static long serialVersionUID = 1L;

    public void evaluate(final RuleSession session, final ValidationObject object, final RuleContext ruleContext) {
        final Operations operations = session.getOperations();
        final RuleProxyField proxyFielddays = session.getRuleProxyField(session.getMetadata(object).getProxyField("days"));
        final RuleProxyField proxyFielddate = session.getRuleProxyField(session.getMetadata(object).getProxyField("date"));
        try {
            session.assign(ruleContext, operations.daysSince(((Date) proxyFielddate.getValue())), proxyFielddays);
        } catch (UnKnownFieldValueException _x) {
            return ;
        }
    }

    public String getRuleName() {
        return "nz.co.senanque.functions.R2:invoice days";
    }

    public String getMessage(final RuleSession session, final ValidationObject object) {
        return session.getMessage("nz.co.senanque.functions.R2", new Object[] { });
    }

    public String toString() {
        return "nz.co.senanque.functions.R2:invoice days";
    }

    public String getClassName() {
        return "Invoice";
    }

    public Class getScope() {
        return Invoice.class;
    }

    public FieldReference[] listeners() {
        return new FieldReference[] {new FieldReference("Invoice", "Invoice", "date")};
    }

    public FieldReference[] outputs() {
        return new FieldReference[] {new FieldReference("Invoice", "Invoice", "days")};
    }

}