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/* The contents of this file are subject to the license and copyright terms
 * detailed in the license directory at the root of the source tree (also
 * available online at http://fedora-commons.org/license/).
 */
package org.fcrepo.client.actions;

import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;

import java.io.ByteArrayOutputStream;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import javax.swing.AbstractAction;
import javax.swing.ImageIcon;
import javax.swing.JInternalFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.text.JTextComponent;

import org.fcrepo.client.Administrator;
import org.fcrepo.client.utility.export.AutoExporter;


/**
 * @author Chris Wilper
 */
public class ViewObjectXML
        extends AbstractAction {

    private static final long serialVersionUID = 1L;

    private Set m_pids;

    private boolean m_prompt;

    private JPanel m_viewPane;

    public ViewObjectXML() {
        super("View Object XML...");
        m_prompt = true;
    }

    public ViewObjectXML(String pid) {
        super("View Object XML");
        m_pids = new HashSet();
        m_pids.add(pid);
    }

    public ViewObjectXML(String pid, JPanel viewPane) {
        super("View Object XML");
        m_pids = new HashSet();
        m_pids.add(pid);
        m_viewPane = viewPane;
    }

    public ViewObjectXML(Set pids) {
        super("View Objects XML");
        m_pids = pids;
    }

    public void actionPerformed(ActionEvent ae) {
        if (m_prompt) {
            String pid = JOptionPane.showInputDialog("Enter the PID.");
            if (pid == null) {
                return;
            }
            m_pids = new HashSet();
            m_pids.add(pid);
        }
        AutoExporter exporter = null;
        try {
            exporter = new AutoExporter(Administrator.APIA, Administrator.APIM);
        } catch (Exception e) {
            Administrator.showErrorDialog(Administrator.getDesktop(),
                                          "View Failure",
                                          e.getClass().getName() + ": "
                                                  + e.getMessage(),
                                          e);
        }
        if (exporter != null) {
            Iterator pidIter = m_pids.iterator();
            while (pidIter.hasNext()) {
                try {
                    String pid = (String) pidIter.next();
                    ByteArrayOutputStream out = new ByteArrayOutputStream();
                    exporter.getObjectXML(pid, out);
                    JTextComponent textEditor = new JTextArea();
                    textEditor.setFont(new Font("monospaced", Font.PLAIN, 12));
                    textEditor.setText(new String(out.toString("UTF-8")));
                    textEditor.setCaretPosition(0);
                    textEditor.setEditable(false);
                    if (m_viewPane == null) {
                        JInternalFrame viewFrame =
                                new JInternalFrame("Viewing " + pid,
                                                   true,
                                                   true,
                                                   true,
                                                   true);
                        ImageIcon editIcon =
                            new ImageIcon(ClassLoader.
                                          getSystemResource("images/client/standard/general/Edit16.gif"));
                        viewFrame.setFrameIcon(editIcon);
                        viewFrame.getContentPane()
                                .add(new JScrollPane(textEditor));
                        viewFrame.setSize(720, 520);
                        viewFrame.setVisible(true);
                        Administrator.getDesktop().add(viewFrame);
                        try {
                            viewFrame.setSelected(true);
                        } catch (java.beans.PropertyVetoException pve) {
                        }
                    } else {
                        m_viewPane.removeAll();
                        m_viewPane.setLayout(new BorderLayout());
                        m_viewPane.add(new JScrollPane(textEditor),
                                       BorderLayout.CENTER);
                        m_viewPane.validate();
                    }
                } catch (Exception e) {
                    Administrator.showErrorDialog(Administrator.getDesktop(),
                                                  "View Failure",
                                                  e.getClass().getName() + ": "
                                                          + e.getMessage(),
                                                  e);
                }
            }
        }
    }

}