/*
    * Copyright (c) 2007 Regents of the University of California (Regents). Created
    * by TELS, Graduate School of Education, University of California at Berkeley.
    *
    * This software is distributed under the GNU Lesser General Public License, v2.
    *
    * Permission is hereby granted, without written agreement and without license
    * or royalty fees, to use, copy, modify, and distribute this software and its
    * documentation for any purpose, provided that the above copyright notice and
   * the following two paragraphs appear in all copies of this software.
   *
   * REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE. THE SOFTWAREAND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED
   * HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE
   * MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
   *
   * IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
   * SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
   * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
   * REGENTS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  package org.telscenter.pas.steps.quickEditors.html;
  
  import java.awt.BorderLayout;
  import java.awt.Dimension;
  import java.awt.FlowLayout;
  import java.awt.event.ActionEvent;
  import java.awt.event.ActionListener;
  import java.awt.event.FocusEvent;
  import java.awt.event.FocusListener;
  import java.io.BufferedReader;
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.net.URL;
  import java.net.URLConnection;
  import java.util.jar.JarOutputStream;
  
  import javax.swing.Action;
  import javax.swing.JButton;
  import javax.swing.JComponent;
  import javax.swing.JFileChooser;
  import javax.swing.JFrame;
  import javax.swing.JLabel;
  import javax.swing.JPanel;
  import javax.swing.JTextArea;
  import javax.swing.JTextField;
  import javax.swing.undo.UndoManager;
  
  import net.sf.sail.core.beans.Pod;
  import net.sf.sail.core.util.BinaryUtils;
  import net.sf.sail.core.util.PodUtils;
  
  import org.telscenter.pas.common.ui.panel.TextEditorPanel;
  import org.telscenter.pas.steps.BrowseWebUI;
  import org.telscenter.pas.steps.DisplayPage;
  import org.telscenter.pas.steps.BrowseWeb.PopupPreviewAction;
  
  /***
   * @author aperritano
   *
   */
  public class EditPageQuickEditorUI extends HtmlQuickEditorUI {
  
  	public static final String VALUE_LOCAL_FILE_URL = "local";
  	private static final int TEXT_BOX_LEN = 25;
  	
  	private JTextArea htmlArea;
  
  	private JButton browseButton;
  	private JTextField localUrlText;
  	private JButton previewButton;
  	private UndoManager undoManager;
  	
  	
  	public EditPageQuickEditorUI(UndoManager undoManager) {
  		this.undoManager = undoManager;
  	}
  	
  //	/* (non-Javadoc)
  //	 * @see org.telscenter.pas.steps.quickEditors.html.HtmlQuickEditorUI#createUI()
  //	 */
  //	@Override
  	protected void createUI() {
  		this.browseWebBean.setIsAuthoringHTMLPage(true);
  		
  		this.setOpaque(false);
  		this.setLayout(new BorderLayout(0,0));
  		JPanel titlePane = new JPanel(new FlowLayout(FlowLayout.LEFT));
  		titlePane.setOpaque(false);
  		JLabel label = new JLabel("HTML Source code:");
  		label.setOpaque(false);
  		
  		titlePane.add(label);
  		
  		
 		this.add(titlePane,BorderLayout.NORTH);
 		
 		
 		htmlArea = new JTextArea();
 		
 		if( this.undoManager != null)
 			htmlArea.getDocument().addUndoableEditListener(this.undoManager);
 		
 		//browseWebBean.beforeSessionStart();
 		browseWebBean.getWebBrowserComponent();
 		
 		if( browseWebBean.getBrowser() != null && browseWebBean.getBrowser().getContent() != null ) {
 			
 			URL url = browseWebBean.getBrowser().getUrl();
 
 			try {
 				if( url != null) {
 				//retreives the text from the url and places it into the text box in the UI
 				htmlArea.setText(readTextFromURL(url.toString()));
 				} else {
 					htmlArea.setText(browseWebBean.getContent());
 				}
 			} catch (IOException e) {
 				// TODO Auto-generated catch block
 				e.printStackTrace();
 			}
 			//htmlArea.setText();
 		}
 		
 		
 		TextEditorPanel ppanel = new TextEditorPanel(htmlArea,new Dimension(400, 125));
 		
 		htmlArea.setBackground(this.getBackground());
 		JButton jb = ppanel.getEditButton();
 //		getComponent
 		 if( jb != null ) {
 			 
 			 jb.addActionListener(new ActionListener() {
 
 				public void actionPerformed(ActionEvent e) {
 					
 					
 					JButton source = (JButton) e.getSource();
 					String clientProperty = (String) source.getClientProperty(TextEditorPanel.MODE);
 
 					if (clientProperty.equals(TextEditorPanel.SAVE_MODE)) {
 						
 						
 						
 						final String text = htmlArea.getText();
 						if( text == null) { 
 							return;
 						}
 									if( text != null ) {
 										htmlArea.setText(text);
 										browseWebBean.setContent(text);
 										//browseWebBean.setUrl(null);
 									}// if
 					}
 				}
 			});
 				 
 		 }// if
 		
 		this.add(createPreviewButton(), BorderLayout.EAST);
 		this.add(ppanel,BorderLayout.CENTER);
 		
 		//this.setBackground(Color.RED);
 
 	}
 	
 	private JPanel createPreviewButton() {
 		JPanel previewButtonPanel = new JPanel(new BorderLayout(0,0));
 		
 		//previewButtonPanel.setBackground(Color.BLUE);
 		previewButtonPanel.setOpaque(false);
 		BrowseWebUI ui = (BrowseWebUI) browseWebBean.getComponent();
 		PopupPreviewAction previewAction = (PopupPreviewAction) browseWebBean.getPreviewAction(false);
 		
 		previewAction.putValue(Action.NAME, "Preview Step");
 //		previewAction.putValue(Action.SMALL_ICON, new ImageIcon(
 //				Curnit.class
 //						.getResource("icons/preview16.png")));
 		 previewButton = new JButton(previewAction);
 		 previewButton.setOpaque(false);
 		 //previewButton.setBounds(100, 100, 200, 100);
 		//previewButton.setEnabled(false);
 		previewButtonPanel.add(previewButton,BorderLayout.NORTH);
 		return previewButtonPanel;
 	}
 	
 	private JComponent createLocalLabelPanel(JPanel formPanel) {
 		JLabel local = new JLabel("File:");
 		return local;
 	}
 
 	private JComponent createLocalTextPanel(JPanel formPanel) {
 		localUrlText = new JTextField(TEXT_BOX_LEN);
 		
 		
 		if( browseWebBean.getUrl() != null ) {
 			
 			
 			String url = browseWebBean.getUrl().toString();
 			
 			localUrlText.setText(url);
 //			if( url.contains("http://"));
 //				localUrlText.setText("");
 		}// if
 		
 		localUrlText.setEditable(false);
 		localUrlText.addFocusListener(new FocusListener() {
 
 			public void focusGained(FocusEvent e) {
 				//System.out.println(".createLocalTextPanel()");
 			}
 
 			public void focusLost(FocusEvent e) {
 				//System.out.println(".focusLost()");
 				
 			}});
 		
 		localUrlText.addActionListener(new ActionListener() {
 
 			public void actionPerformed(ActionEvent e) {
 				previewButton.setEnabled(true);
 			}});
 		return localUrlText;
 	}
 	
 	/***
 	 * @param object
 	 * @return
 	 */
 	private JButton createLocalButtonPanel(JPanel formPanel) {
 		browseButton = new JButton("Select File");
 		//browseButton.setIcon(new ImageIcon(getClass().getResource("icons/importHTML16.png")));
 		browseButton.addActionListener(new ActionListener() {
 
 			public void actionPerformed(ActionEvent e) {
 				browseForBean();
 			}
 		});
 		browseButton.setToolTipText("Import a HTML from a local file.");
 		//CommonUI.makeEnhancedButton(browseButton);
 		return browseButton;
 	}
 
 	/***
 	 * 
 	 */
 	protected void browseForBean() {
 		final File selectedFile = showChooserAndReturnFile();
 
 		if( selectedFile == null )
 			return;
 		
 		Pod browseWebStep = PodUtils.resolvePod(browseWebBean);
 		URL resURL = null;
 		try {
 			// need to chech if the archive already exists
 			// and get the existing one.
 			JarOutputStream podResources = BinaryUtils
 					.newPodArchiveFor(browseWebStep);
 
 			resURL  = BinaryUtils.addToArchive(browseWebStep,
 					podResources, selectedFile.getName(),
 					new FileInputStream(selectedFile));
 			podResources.close();
 			// ((AbstractUrlStep) bean).setUrl(resURL);
 
 			localUrlText.setText(selectedFile.getAbsolutePath());
 		} catch (Exception exc) {
 			exc.printStackTrace();
 		}// try
 
 		
 		browseWebBean.setUrl(resURL); //commented by Geoff
 		localUrlText.setText(resURL.toString());
 	}
 
 	/***
 	 * @return
 	 */
 	protected File showChooserAndReturnFile() {
 		JFileChooser chooser = new JFileChooser();
 		chooser.setFileFilter(new HtmlFilter());
 		int returnVal = chooser.showOpenDialog(browseButton);
 		if (returnVal != JFileChooser.APPROVE_OPTION) {
 			return null;
 		}
 
 		final File selectedFile = chooser.getSelectedFile();
 		return selectedFile;
 	}
 	
 	class HtmlFilter extends javax.swing.filechooser.FileFilter {
 		public boolean accept(File file) {
 			String filename = file.getName();
 
 			if (file.isDirectory())
 				return true;
 			if (filename.endsWith(".html"))
 				return true;
 			if (filename.endsWith(".htm"))
 				return true;
 
 			return false;
 		}
 
 		public String getDescription() {
 			return "*.html,*.htm";
 		}
 	}
 
 	   /***
 	    * This subroutine attempts to copy text from the specified URL onto the screen.  
 	    * Any error must be handled by the caller of this subroutine.
 	    * @param urlString contains the URL in text form
 	    */
 	   static String readTextFromURL( String urlString ) throws IOException {
 
 	      /* Open a connection to the URL, and get an input stream
 	           for reading data from the URL. */
 
 	      URL url = new URL(urlString);
 	      URLConnection connection = url.openConnection();
 	      InputStream urlData = connection.getInputStream();
 	      StringBuffer stringBuf = new StringBuffer();
 
 	      /* Check that the content is some type of text.  Note: If 
 	         getContentType() method were called before getting  the input 
 	         stream, it is possible for contentType to be null only because 
 	         no connection can be made.  The getInputStream() method will 
 	         throw an error if no connection can be made. */
 
 	      String contentType = connection.getContentType();
 	      if (contentType == null || contentType.startsWith("text") == false)
 	         throw new IOException("URL does not seem to refer to a text file.");
 
 	      /* Copy lines of text from the input stream to the screen, until
 	           end-of-file is encountered  (or an error occurs). */
 	      
 	      BufferedReader in;  // For reading from the connection's input stream.
 	      in = new BufferedReader( new InputStreamReader(urlData) );
 
 	      while (true) {
 	         String line = in.readLine();
 	         if (line == null) {
 	            break;
 	         }
 	         stringBuf.append(line);
 	      }
 	      
 	      return stringBuf.toString();
 	   }
 
 	   public static void main(String args[]) {
 		   DisplayPage dp = new DisplayPage();
 		   dp.setContent("<html><p>hello</p></html>");
 //		   try {
 //			   dp.setUrl(new URL("http://www.google.com"));
 //		   } catch(MalformedURLException mURLE) {
 //			   System.out.println("Bad URL");
 //		   }
 		   
 		   JFrame frame = new JFrame("FrameDemo");
 		 //System.out.println("content: " + dp.getContent());
 		 //2. Optional: What happens when the frame closes?
 		 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
 		 //create HTMLEditor here, then do htmleditor.setbean(dp)
 		 //pass as emptylabel
 		 //set size of frame
 		 
 		 EditPageQuickEditorUI pageEditor = new EditPageQuickEditorUI(null);
 		 //OutsideLinkQuickEditorUI pageEditor = new OutsideLinkQuickEditorUI();
 		 pageEditor.setBean(dp);
 		 frame.setSize(500, 500);
 		 //3. Create components and put them in the frame.
 		 //...create emptyLabel...
 		 frame.getContentPane().add(pageEditor, BorderLayout.CENTER);
 
 		 //4. Size the frame.
 		 frame.pack();
 
 		 //5. Show it.
 		 frame.setVisible(true);
 	   }
 
 }