package pt.ist.renderers;

import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;

import pt.ist.renderers.components.HtmlComponent;
import pt.ist.renderers.components.HtmlText;
import pt.ist.renderers.layouts.Layout;

/**
 * This renderer provides a generic presentation for a decimal number. The
 * number is formatted according to the format property
 * 
 * @author naat
 * @author jdnf
 */
public class DecimalRenderer extends OutputRenderer {

    private String format;

    private String negativeStyle;

    private String positiveStyle;

    private char decimalSeparator;

    private char groupingSeparator;

    private String currencySymbol;

    private static final String DEFAULT_FORMAT = "######0.00";

    public DecimalRenderer() {
	setFormat(DEFAULT_FORMAT);
	DecimalFormatSymbols decimalFormatSymbols = new DecimalFormat(getFormat()).getDecimalFormatSymbols();
	setDecimalSeparator(decimalFormatSymbols.getDecimalSeparator());
	setGroupingSeparator(decimalFormatSymbols.getGroupingSeparator());
	setCurrencySymbol(decimalFormatSymbols.getCurrencySymbol());
    }

    @Override
    protected Layout getLayout(Object object, Class type) {
	return new Layout() {

	    @Override
	    public HtmlComponent createComponent(Object object, Class type) {
		HtmlText htmlText = new HtmlText(getDecimalFormat().format(object));
		if (object != null && ((Number) object).doubleValue() < 0) {
		    setStyle(getNegativeStyle());
		} else {
		    setStyle(getPositiveStyle());
		}
		return htmlText;
	    }

	    private DecimalFormat getDecimalFormat() {
		DecimalFormat decimalFormat = new DecimalFormat(getFormat());
		DecimalFormatSymbols decimalFormatSymbols = decimalFormat.getDecimalFormatSymbols();
		decimalFormatSymbols.setDecimalSeparator(getDecimalSeparator());
		decimalFormatSymbols.setMonetaryDecimalSeparator(decimalFormatSymbols.getDecimalSeparator());
		decimalFormatSymbols.setGroupingSeparator(getGroupingSeparator());
		decimalFormatSymbols.setCurrencySymbol(getCurrencySymbol());
		decimalFormat.setDecimalFormatSymbols(decimalFormatSymbols);
		return decimalFormat;
	    }

	};
    }

    public String getFormat() {
	return format;
    }

    public void setFormat(String format) {
	this.format = format;
    }

    public String getNegativeStyle() {
	return negativeStyle;
    }

    public void setNegativeStyle(String negativeStyle) {
	this.negativeStyle = negativeStyle;
    }

    public String getPositiveStyle() {
	return positiveStyle;
    }

    public void setPositiveStyle(String positiveStyle) {
	this.positiveStyle = positiveStyle;
    }

    public char getDecimalSeparator() {
	return decimalSeparator;
    }

    public void setDecimalSeparator(char decimalSeparator) {
	this.decimalSeparator = decimalSeparator;
    }

    public char getGroupingSeparator() {
	return groupingSeparator;
    }

    public void setGroupingSeparator(char groupingSeparator) {
	this.groupingSeparator = groupingSeparator;
    }

    public String getCurrencySymbol() {
	return currencySymbol;
    }

    public void setCurrencySymbol(String currencySymbol) {
	this.currencySymbol = currencySymbol;
    }

}