/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */

package org.apache.jmeter.protocol.java.control.gui;

import java.awt.BorderLayout;
import java.util.Arrays;
import java.util.Properties;
import java.util.Set;

import javax.swing.Box;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

import org.apache.jmeter.protocol.java.sampler.BSFSampler;
import org.apache.jmeter.samplers.gui.AbstractSamplerGui;
import org.apache.jmeter.testelement.TestElement;
import org.apache.jmeter.util.JMeterUtils;

public class BSFSamplerGui extends AbstractSamplerGui {
	private JTextArea scriptField;

	private JComboBox langField;// Language

	private JTextField filename;// script file name (if present)

	private JTextField parameters;// parameters to pass to script file (or script)

	public BSFSamplerGui() {
		init();
	}

	public void configure(TestElement element) {
		super.configure(element);
		BSFSampler sampler = (BSFSampler) element;
		scriptField.setText(sampler.getScript());
		langField.setSelectedItem(sampler.getScriptLanguage());
        filename.setText(sampler.getFilename());
        parameters.setText(sampler.getParameters());
	}

	public TestElement createTestElement() {
		BSFSampler sampler = new BSFSampler();
		modifyTestElement(sampler);
		return sampler;
	}

	/**
	 * Modifies a given TestElement to mirror the data in the gui components.
	 * 
	 * @see org.apache.jmeter.gui.JMeterGUIComponent#modifyTestElement(TestElement)
	 */
	public void modifyTestElement(TestElement te) {
		te.clear();
		this.configureTestElement(te);
		BSFSampler sampler = (BSFSampler) te;
		sampler.setFilename(filename.getText());
		sampler.setScriptLanguage((String) langField.getSelectedItem());
		sampler.setParameters(parameters.getText());
		sampler.setScript(scriptField.getText());
	}
    
    /**
     * Implements JMeterGUIComponent.clearGui
     */
    public void clearGui() {
        super.clearGui();
        
        scriptField.setText(""); //$NON-NLS-1$
        langField.setSelectedIndex(0);
        filename.setText(""); //$NON-NLS-1$
        parameters.setText(""); //$NON-NLS-1$
    }    

	public String getLabelResource() {
		return "bsf_sampler_title"; // $NON-NLS-1$
	}

	private void init() {
		setLayout(new BorderLayout(0, 5));
		setBorder(makeBorder());

		Box box = Box.createVerticalBox();
		box.add(makeTitlePanel());
		box.add(createLanguagePanel());
		box.add(createFilenamePanel());
		box.add(createParameterPanel());
		add(box, BorderLayout.NORTH);

		JPanel panel = createScriptPanel();
		add(panel, BorderLayout.CENTER);
		// Don't let the input field shrink too much
		add(Box.createVerticalStrut(panel.getPreferredSize().height), BorderLayout.WEST);
	}

	private JPanel createParameterPanel() {
		JLabel label = new JLabel(JMeterUtils.getResString("bsf_script_parameters")); // $NON-NLS-1$

		parameters = new JTextField(10);
		label.setLabelFor(parameters);

		JPanel parameterPanel = new JPanel(new BorderLayout(5, 0));
		parameterPanel.add(label, BorderLayout.WEST);
		parameterPanel.add(parameters, BorderLayout.CENTER);
		return parameterPanel;
	}

	private JPanel createFilenamePanel()// TODO ought to be a FileChooser ...
	{
		JLabel label = new JLabel(JMeterUtils.getResString("bsf_script_file")); // $NON-NLS-1$

		filename = new JTextField(10);
		label.setLabelFor(filename);

		JPanel filenamePanel = new JPanel(new BorderLayout(5, 0));
		filenamePanel.add(label, BorderLayout.WEST);
		filenamePanel.add(filename, BorderLayout.CENTER);
		return filenamePanel;
	}

	private JPanel createLanguagePanel() {
		JLabel label = new JLabel(JMeterUtils.getResString("bsf_script_language")); // $NON-NLS-1$

		Properties p = JMeterUtils.loadProperties("org/apache/bsf/Languages.properties"); // $NON-NLS-1$
        // We have added Jexl in BSFSampler.
        p.put("jexl", ""); // $NON-NLS-1$
		Set keySet = p.keySet();
		// TODO - perhaps weed out ones which don't exist?
		String [] items = (String[]) keySet.toArray(new String[]{});
		Arrays.sort(items);

		langField = new JComboBox(items);
		langField.setEditable(true);
		label.setLabelFor(langField);

		JPanel langPanel = new JPanel(new BorderLayout(5, 0));
		langPanel.add(label, BorderLayout.WEST);
		langPanel.add(langField, BorderLayout.CENTER);

		return langPanel;
	}

	private JPanel createScriptPanel() {
		scriptField = new JTextArea();
		scriptField.setRows(4);
		scriptField.setLineWrap(true);
		scriptField.setWrapStyleWord(true);

		JLabel label = new JLabel(JMeterUtils.getResString("bsf_script")); // $NON-NLS-1$
		label.setLabelFor(scriptField);

		JPanel panel = new JPanel(new BorderLayout());
		panel.add(label, BorderLayout.NORTH);
		panel.add(new JScrollPane(scriptField), BorderLayout.CENTER);
		return panel;
	}
}
