package com.c2kernel.gui.tabs.outcome.form.field;

import java.awt.Component;
import java.util.Enumeration;
import java.util.StringTokenizer;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.text.JTextComponent;

import org.exolab.castor.types.AnyNode;
import org.exolab.castor.xml.schema.AttributeDecl;
import org.exolab.castor.xml.schema.ElementDecl;
import org.exolab.castor.xml.schema.Facet;
import org.exolab.castor.xml.schema.SimpleType;

import com.c2kernel.gui.tabs.outcome.form.StructuralException;
import com.c2kernel.scripting.Script;
import com.c2kernel.utils.Logger;

/*******************************************************************************
 * 
 * $Revision: 1.4 $ $Date: 2005/08/16 13:59:56 $
 * 
 * Copyright (C) 2003 CERN - European Organization for Nuclear Research All
 * rights reserved.
 ******************************************************************************/

public class ComboField extends StringEditField {

    JComboBox comboField;
    ListOfValues vals;
    DefaultComboBoxModel comboModel;
    AnyNode listNode;

    public ComboField(SimpleType type, AnyNode listNode) {
        super();
        comboField = new JComboBox();
        content = type;
        this.listNode = listNode;
        createLOV();
    }
    
    public String getDefaultValue() {
        if (vals.getDefaultKey() != null)
            return vals.get(vals.getDefaultKey()).toString();
        else
            return "";
    }

    public String getText() {
        return vals.get(comboModel.getSelectedItem()).toString();
    }

    public JTextComponent makeTextField() {
        // not used by this control
        return null;
    }

    public void setText(String text) {
        comboModel.setSelectedItem(text);
    }

    public Component getControl() {
        return comboField;
    }

    private void createLOV() {
        vals = new ListOfValues();

        if (listNode != null) { // schema instructions for list building
            String lovType = listNode.getLocalName();
            String param = listNode.getFirstChild().getStringValue();
            if (lovType.equals("ScriptList"))
                populateLOVFromScript(param);
            if (lovType.equals("PathList"))
                populateLOVFromLDAP(param);
        }
        
        // handle enumerations
        // TODO: should be ANDed with above results
        if (content.hasFacet(Facet.ENUMERATION)) {
            //ListOfValues andList = new ListOfValues();
            Enumeration enums = content.getFacets(Facet.ENUMERATION);
            while (enums.hasMoreElements()) {
                Facet thisEnum = (Facet)enums.nextElement();
                vals.put(thisEnum.getValue(), thisEnum.getValue(), false);
            }
        }

        comboModel = new DefaultComboBoxModel(vals.keySet().toArray());
        comboModel.setSelectedItem(vals.getDefaultKey());
        comboField.setModel(comboModel);
    }

    /**
     * @param param
     */
    private void populateLOVFromLDAP(String param) {
        // TODO '/root/path;prop=val;prop=val'
        
        
    }

    private void populateLOVFromScript(String scriptName) {
        try {
            StringTokenizer tok = new StringTokenizer(scriptName, "_");
            if (tok.countTokens() != 2)
                throw new Exception("Invalid LOVScript name");
            Script lovscript = new Script(tok.nextToken(), Integer.parseInt(tok.nextToken()));
            lovscript.setInputParamValue("LOV", vals);
            lovscript.execute();
        } catch (Exception ex) {
            Logger.exceptionDialog(ex);
        }
    }

    public void setDecl(AttributeDecl model) throws StructuralException {
        super.setDecl(model);
        createLOV();
    }

    public void setDecl(ElementDecl model) throws StructuralException {
        super.setDecl(model);
        createLOV();
    }

    /**
     *
     */

    public void setEditable(boolean editable) {
        comboField.setEditable(editable);
    }
}