/*
 * 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.assertions.gui;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;

import org.apache.jmeter.assertions.HTMLAssertion;
import org.apache.jmeter.gui.util.FilePanel;
import org.apache.jmeter.gui.util.HorizontalPanel;
import org.apache.jmeter.gui.util.VerticalPanel;
import org.apache.jmeter.testelement.TestElement;
import org.apache.jmeter.util.JMeterUtils;
import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;

/**
 * GUI for HTMLAssertion
 */
public class HTMLAssertionGui extends AbstractAssertionGui implements KeyListener, ActionListener {

	private static final Logger log = LoggingManager.getLoggerForClass();

	private static final long serialVersionUID = 1L;

	// Names for the fields
	private static final String WARNING_THRESHOLD_FIELD = "warningThresholdField"; // $NON-NLS-1$

	private static final String ERROR_THRESHOLD_FIELD = "errorThresholdField"; // $NON-NLS-1$

	// instance attributes
	private JTextField errorThresholdField = null;

	private JTextField warningThresholdField = null;

	private JCheckBox errorsOnly = null;

	private JComboBox docTypeBox = null;

	private JRadioButton htmlRadioButton = null;

	private JRadioButton xhtmlRadioButton = null;

	private JRadioButton xmlRadioButton = null;

	private FilePanel filePanel = null;

	/**
	 * The constructor.
	 */
	public HTMLAssertionGui() {
		init();
	}

	/**
	 * Returns the label to be shown within the JTree-Component.
	 */
	public String getLabelResource() {
		return "html_assertion_title"; // $NON-NLS-1$
	}

	/**
	 * @see org.apache.jmeter.gui.JMeterGUIComponent#createTestElement()
	 */
	public TestElement createTestElement() {
		HTMLAssertion el = new HTMLAssertion();
		modifyTestElement(el);
		return el;
	}

	/**
	 * Modifies a given TestElement to mirror the data in the gui components.
	 * 
	 * @see org.apache.jmeter.gui.JMeterGUIComponent#modifyTestElement(TestElement)
	 */
	public void modifyTestElement(TestElement inElement) {

		log.debug("HTMLAssertionGui.modifyTestElement() called");

		configureTestElement(inElement);

		String errorThresholdString = errorThresholdField.getText();
		long errorThreshold = 0;

		try {
			errorThreshold = Long.parseLong(errorThresholdString);
		} catch (NumberFormatException e) {
			errorThreshold = 0;
		}
		((HTMLAssertion) inElement).setErrorThreshold(errorThreshold);

		String warningThresholdString = warningThresholdField.getText();
		long warningThreshold = 0;
		try {
			warningThreshold = Long.parseLong(warningThresholdString);
		} catch (NumberFormatException e) {
			warningThreshold = 0;
		}
		((HTMLAssertion) inElement).setWarningThreshold(warningThreshold);

		String docTypeString = docTypeBox.getSelectedItem().toString();
		((HTMLAssertion) inElement).setDoctype(docTypeString);

		boolean trackErrorsOnly = errorsOnly.isSelected();
		((HTMLAssertion) inElement).setErrorsOnly(trackErrorsOnly);

		if (htmlRadioButton.isSelected()) {
			((HTMLAssertion) inElement).setHTML();
		} else if (xhtmlRadioButton.isSelected()) {
			((HTMLAssertion) inElement).setXHTML();
		} else {
			((HTMLAssertion) inElement).setXML();
		}
		((HTMLAssertion) inElement).setFilename(filePanel.getFilename());
	}

    /**
     * Implements JMeterGUIComponent.clearGui
     */
    public void clearGui() {
        super.clearGui();

        docTypeBox.setSelectedIndex(0);
        htmlRadioButton.setSelected(true);
        xhtmlRadioButton.setSelected(false);
        xmlRadioButton.setSelected(false);
        errorThresholdField.setText("0"); //$NON-NLS-1$
        warningThresholdField.setText("0"); //$NON-NLS-1$
        filePanel.setFilename(""); //$NON-NLS-1$
        errorsOnly.setSelected(false);
    }    

	/**
	 * Configures the associated test element.
	 * 
	 * @param inElement
	 */
	public void configure(TestElement inElement) {
		super.configure(inElement);
		HTMLAssertion lAssertion = (HTMLAssertion) inElement;
		errorThresholdField.setText(String.valueOf(lAssertion.getErrorThreshold()));
		warningThresholdField.setText(String.valueOf(lAssertion.getWarningThreshold()));
		errorsOnly.setSelected(lAssertion.isErrorsOnly());
		docTypeBox.setSelectedItem(lAssertion.getDoctype());
		if (lAssertion.isHTML()) {
			htmlRadioButton.setSelected(true);
		} else if (lAssertion.isXHTML()) {
			xhtmlRadioButton.setSelected(true);
		} else {
			xmlRadioButton.setSelected(true);
		}
		if (lAssertion.isErrorsOnly()) {
			warningThresholdField.setEnabled(false);
			warningThresholdField.setEditable(false);
		}
		else {
			warningThresholdField.setEnabled(true);
			warningThresholdField.setEditable(true);
		}
		filePanel.setFilename(lAssertion.getFilename());
	}

	/**
	 * Inits the GUI.
	 */
	private void init() {

		setLayout(new BorderLayout(0, 10));
		setBorder(makeBorder());

		add(makeTitlePanel(), BorderLayout.NORTH);

		JPanel mainPanel = new JPanel(new BorderLayout());

		// USER_INPUT
		VerticalPanel assertionPanel = new VerticalPanel();
		assertionPanel.setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(), "Tidy Settings"));

		// doctype
		HorizontalPanel docTypePanel = new HorizontalPanel();
		docTypeBox = new JComboBox(new Object[] { "omit", "auto", "strict", "loose" });
		// docTypePanel.add(new
		// JLabel(JMeterUtils.getResString("duration_assertion_label"))); //$NON-NLS-1$
		docTypePanel.add(new JLabel("Doctype:"));
		docTypePanel.add(docTypeBox);
		assertionPanel.add(docTypePanel);

		// format (HMTL, XHTML, XML)
		VerticalPanel formatPanel = new VerticalPanel();
		formatPanel.setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(), "Format"));
		htmlRadioButton = new JRadioButton("HTML", true); //$NON-NLS-1$
		xhtmlRadioButton = new JRadioButton("XHTML", false); //$NON-NLS-1$
		xmlRadioButton = new JRadioButton("XML", false); //$NON-NLS-1$
		ButtonGroup buttonGroup = new ButtonGroup();
		buttonGroup.add(htmlRadioButton);
		buttonGroup.add(xhtmlRadioButton);
		buttonGroup.add(xmlRadioButton);
		formatPanel.add(htmlRadioButton);
		formatPanel.add(xhtmlRadioButton);
		formatPanel.add(xmlRadioButton);
		assertionPanel.add(formatPanel);

		// errors only
		errorsOnly = new JCheckBox("Errors only", false);
		errorsOnly.addActionListener(this);
		assertionPanel.add(errorsOnly);

		// thresholds
		HorizontalPanel thresholdPanel = new HorizontalPanel();
		thresholdPanel.add(new JLabel("Error threshold:"));
		errorThresholdField = new JTextField("0", 5); // $NON-NLS-1$
		errorThresholdField.setName(ERROR_THRESHOLD_FIELD);
		errorThresholdField.addKeyListener(this);
		thresholdPanel.add(errorThresholdField);
		thresholdPanel.add(new JLabel("Warning threshold:"));
		warningThresholdField = new JTextField("0", 5); // $NON-NLS-1$
		warningThresholdField.setName(WARNING_THRESHOLD_FIELD);
		warningThresholdField.addKeyListener(this);
		thresholdPanel.add(warningThresholdField);
		assertionPanel.add(thresholdPanel);

		// file panel
		filePanel = new FilePanel(JMeterUtils.getResString("html_assertion_file"), ".txt"); //$NON-NLS-1$ //$NON-NLS-2$
		assertionPanel.add(filePanel);

		mainPanel.add(assertionPanel, BorderLayout.NORTH);
		add(mainPanel, BorderLayout.CENTER);
	}

	/**
	 * This method is called if one of the threshold field looses the focus
	 * 
	 * @param inEvent
	 */
	public void focusLost(FocusEvent inEvent) {
		log.debug("HTMLAssertionGui.focusLost() called");

		String errorThresholdString = errorThresholdField.getText();
		if (errorThresholdString != null) {
			boolean isInvalid = false;
			try {
				long errorThreshold = Long.parseLong(errorThresholdString);
				if (errorThreshold < 0) {
					isInvalid = true;
				}
			} catch (NumberFormatException ex) {
				isInvalid = true;
			}
			if (isInvalid) {
				log.warn("HTMLAssertionGui: Error threshold Not a valid number!");
				JOptionPane.showMessageDialog(null, "Threshold for errors is invalid", "Error",
						JOptionPane.ERROR_MESSAGE);
			}
		}

		String warningThresholdString = warningThresholdField.getText();
		if (warningThresholdString != null) {
			boolean isInvalid = false;
			try {
				long warningThreshold = Long.parseLong(warningThresholdString);
				if (warningThreshold < 0) {
					isInvalid = true;
				}
			} catch (NumberFormatException ex) {
				isInvalid = true;
			}
			if (isInvalid) {
				log.warn("HTMLAssertionGui: Error threshold Not a valid number!");
				JOptionPane.showMessageDialog(null, "Threshold for warnings is invalid", "Error",
						JOptionPane.ERROR_MESSAGE);
			}
		}
	}

	/**
	 * @see java.awt.event.FocusListener#focusGained(java.awt.event.FocusEvent)
	 */
	public void focusGained(FocusEvent e) {

	}

	/**
	 * This method is called from erros-only checkbox
	 * 
	 * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
	 */
	public void actionPerformed(ActionEvent e) {
		if (errorsOnly.isSelected()) {
			warningThresholdField.setEnabled(false);
			warningThresholdField.setEditable(false);
		} else {
			warningThresholdField.setEnabled(true);
			warningThresholdField.setEditable(true);
		}
	}

	public void keyPressed(KeyEvent e) {
	}

	public void keyReleased(KeyEvent e) {
		String fieldName = e.getComponent().getName();

		if (fieldName.equals(WARNING_THRESHOLD_FIELD)) {
			validateInteger(warningThresholdField);
		}
		
		if (fieldName.equals(ERROR_THRESHOLD_FIELD)) {
			validateInteger(errorThresholdField);
		}
	}

	private void validateInteger(JTextField field){
		try {
			Integer.parseInt(field.getText());
		} catch (NumberFormatException nfe) {
			int length = field.getText().length();
			if (length > 0) {
				JOptionPane.showMessageDialog(this, "Only digits allowed", "Invalid data",
						JOptionPane.WARNING_MESSAGE);
				// Drop the last character:
				field.setText(field.getText().substring(0, length-1));
			}
		}

	}
	public void keyTyped(KeyEvent e) {
	}

}
