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package org.wicketstuff.egrid.behavior;

import org.apache.wicket.Component;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.util.io.IClusterable;
import org.apache.wicket.util.string.Strings;
import org.wicketstuff.egrid.attribute.HTMLAttribute;
import org.wicketstuff.egrid.attribute.StyleAttribute;

public class StyleAttributeBehavior extends Behavior implements IClusterable {

	private static final long serialVersionUID 			= 1L;

	private static final String EMPTY 					= "";
	private static final String SEPERATOR_SPACE			= " ";
	private static final String SEPERATOR_COLON			= ":";
	private static final String SEPERATOR_SEMI_COLON	= ";";

	private StyleAttribute styleAttribute;

	public StyleAttributeBehavior(final StyleAttribute styleAttribute) {

		if (styleAttribute == null) {
			throw new IllegalArgumentException("Argument [styleAttribute] cannot be null");
		}
		this.styleAttribute	= styleAttribute;
	}

	public final void onComponentTag(final Component component, final ComponentTag tag) {
		super.onComponentTag(component, tag);

		String existingStyles = (String) tag.getAttributes().get(HTMLAttribute.STYLE);
		putExistingStyles(existingStyles);

		onStyleAttribute(this.styleAttribute);

		String styles = this.styleAttribute.getStyles();
		if (!Strings.isEmpty(styles)) {
			tag.put(HTMLAttribute.STYLE, styles);
		}
	}

	private void putExistingStyles(final String styleAtt) {

		if (styleAtt != null) {
			String[] items = styleAtt.split(SEPERATOR_SEMI_COLON);
			for (int i = 0; i < items.length; i++) {
				String item = items[i];
				this.styleAttribute.put(
						item.substring(0, item.indexOf(SEPERATOR_COLON)).replaceAll(SEPERATOR_SPACE, EMPTY),
						item.substring(item.indexOf(SEPERATOR_COLON) + 1, item.length()).replaceAll(SEPERATOR_SPACE, EMPTY));
			}
		}
	}

	protected void onStyleAttribute(final StyleAttribute styleAttribute) {

	}
}