package net.wotonomy.web;

import net.wotonomy.foundation.NSArray;
import net.wotonomy.foundation.NSDictionary;
import net.wotonomy.foundation.NSKeyValueCodingAdditions;

public class WOPopUpButton extends WOInput {

	public WOPopUpButton() {
		super();
	}

	public WOPopUpButton(String aName, NSDictionary assocs, WOElement template) {
		super(aName, assocs, template);
	}

	protected String inputType() {
		return "SELECT";
	}

	protected int inputSize() {
		return 1;
	}

	protected NSArray list(WOContext c) {
		NSArray l = (NSArray) valueForProperty("list", c.component());
		if (l == null)
			l = NSArray.EmptyArray;
		return l;
	}

	protected void setItem(Object v, WOContext c) {
		if (associations.objectForKey("item") == null)
			return;
		setValueForProperty("item", v, c.component());
	}

	protected Object item(WOContext c) {
		return valueForProperty("item", c.component());
	}

	protected void setSelection(Object v, WOContext c) {
		if (associations.objectForKey("selection") == null)
			return;
		setValueForProperty("selection", v, c.component());
	}

	protected Object selection(WOContext c) {
		return valueForProperty("selection", c.component());
	}

	public Object value(WOContext c) {
		return null;
	}

	public void appendToResponse(WOResponse r, WOContext c) {
		r.appendContentString("<SELECT NAME=\"");
		r.appendContentString(inputName(c));
		r.appendContentString("\" SIZE=");
		r.appendContentString(Integer.toString(inputSize()));
		r.appendContentString(">");
		java.util.Enumeration numerador = list(c).objectEnumerator();
		String displayKey = stringForProperty("displayString", c.component());
		String valueKey = stringForProperty("value", c.component());
		Object sel = selection(c);
		if (sel == null)
			sel = item(c);
		int pos = 0;
		while (numerador.hasMoreElements()) {
			Object item = numerador.nextElement();
			setItem(item, c);
			r.appendContentString("<OPTION ");
			// Append the "SELECTED" attribute if it's the selected item
			if (sel != null && item.equals(sel))
				r.appendContentString("SELECTED ");
			r.appendContentString("VALUE=\"");
			// Append the value
			if (valueKey != null && item instanceof NSKeyValueCodingAdditions) {
				Object val = ((NSKeyValueCodingAdditions) item).valueForKeyPath(valueKey);
				if (val == null)
					val = "null";
				r.appendContentString(val.toString());
			} else
				r.appendContentString(Integer.toString(pos));
			r.appendContentString("\">");
			// Append display string
			if (displayKey != null && item instanceof NSKeyValueCodingAdditions) {
				Object ds = ((NSKeyValueCodingAdditions) item).valueForKeyPath(displayKey);
				if (ds == null)
					ds = "";
				r.appendContentString(ds.toString());
			} else
				r.appendContentString(item.toString());
			r.appendContentString("\n");
			pos++;
		}
		r.appendContentString("</SELECT>");
	}

	protected void select(Object v, WOContext c) {
		if (associations.objectForKey("selection") != null) {
			setSelection(v, c);
			return;
		}
		if (associations.objectForKey("item") != null) {
			setItem(v, c);
		}
	}

	public void takeValuesFromRequest(WORequest r, WOContext c) {
		Object val = r.formValueForKey(inputName(c));
		if (val == null)
			return;
		NSArray list = list(c);
		String valueKey = stringForProperty("value", c.component());
		// If no value binding, just get the index
		if (valueKey == null) {
			int pos = Integer.parseInt(val.toString());
			val = list.objectAtIndex(pos);
			select(val, c);
			return;
		}
		// If value binding is present, lookup the value
		java.util.Enumeration numerador = list.objectEnumerator();
		while (numerador.hasMoreElements()) {
			Object o = numerador.nextElement();
			if (o instanceof NSKeyValueCodingAdditions) {
				Object x = ((NSKeyValueCodingAdditions) o).valueForKeyPath(valueKey);
				if (x != null && x.equals(val)) {
					select(o, c);
					return;
				}
			}
		}
	}

}