/*
 *                 Sun Public License Notice
 *
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 *
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2003 Sun
 * Microsystems, Inc. All Rights Reserved.
 */
package org.netbeans.modules.javacore;

import org.netbeans.api.java.classpath.ClassPath;
import org.netbeans.spi.java.classpath.ClassPathImplementation;
import org.netbeans.modules.javacore.classpath.MergedClassPathImplementation;
import org.netbeans.modules.javacore.internalapi.ProgressListener;
import org.netbeans.modules.javacore.internalapi.ProgressEvent;
import org.openide.util.RequestProcessor;
import org.openide.util.NbBundle;

import javax.swing.*;
import java.awt.*;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import java.text.MessageFormat;

import javax.swing.border.EmptyBorder;
import org.openide.windows.WindowManager;

public class ProgressPanel extends JDialog implements ProgressListener, PropertyChangeListener{

    private static final float FIRST_RUN_PERCENTAGE = 100;
    private static final String MAX_TEXT = "oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo"; // NOI18N

    private JProgressBar progress;
    private ClassPathImplementation cp;
    private JMManager model;
    private boolean dirty = false;
    private float count;
    private float value;
    private JLabel labelScanning, labelNote, labelPackage, pleaseWait;
    private JPanel panel, pPanel;

    private ProgressPanel (JMManager model) {
        super(WindowManager.getDefault().getMainWindow());
        this.model = model;
        this.model.getProgressSupport().addProgressListener (this);
        this.cp = model.cpImpl;
        this.cp.addPropertyChangeListener (this);
        this.initComponents ();
        this.value = 0;
    }

    public void start(ProgressEvent event) {
        int ec = event.getCount();
        if (ec < 5) ec = 3;
        this.count = (FIRST_RUN_PERCENTAGE - value) / ((float)ec);
    }

    public void step(final ProgressEvent event) {
        SwingUtilities.invokeLater(
                new Runnable () {
                    public void run() {
                        value+=((float) event.getCount()) * count;
                        progress.setValue(Math.round(value));
                    }
                }
        );
    }

    public void stop(ProgressEvent event) {
        if (JMManager.SCAN_DEBUG) System.err.println("ProgressPanel: stop1"); // NOI18N
        if (this.getDirty()) {
            if (JMManager.SCAN_DEBUG) System.err.println("ProgressPanel: stop2 - dirty"); // NOI18N
            this.startResolution ();
        }
        else {
            if (JMManager.SCAN_DEBUG) System.err.println("ProgressPanel: stop3"); // NOI18N
            SwingUtilities.invokeLater(
                new Runnable () {
                    public void run() {
                        if (JMManager.SCAN_DEBUG) System.err.println("ProgressPanel: disposing dialog"); // NOI18N
                        ProgressPanel.this.progress.setValue(100);
                        ProgressPanel.this.setVisible(false);
                        ProgressPanel.this.dispose();
                    }
                }
            );
        }
    }

    public synchronized void propertyChange(PropertyChangeEvent evt) {
        if (MergedClassPathImplementation.PROP_UNRESOLVED_ROOTS.equals(evt.getPropertyName())) {
            if (JMManager.SCAN_DEBUG) System.err.println("ProgressPanel: globalpath changed"); // NOI18N
            this.dirty = true;
        }
    }

    public void setVisible(boolean visible) {
        if (visible) {
            if (JMManager.SCAN_DEBUG) System.err.println("ProgressPanel: setVisible1"); // NOI18N
            this.startResolution();
        }
        super.setVisible(visible);
        if (visible) {
            if (JMManager.SCAN_DEBUG) System.err.println("ProgressPanel: setVisible2"); // NOI18N
            this.model.getProgressSupport().removeProgressListener (this);
            this.cp.removePropertyChangeListener (this);
        }
    }

    private synchronized boolean getDirty () {
        boolean res = this.dirty;
        this.dirty = false;
        return res;
    }

    private void startResolution() {
        if (JMManager.SCAN_DEBUG) System.err.println("ProgressPanel: startResolution"); // NOI18N
        model.startResolution();
    }

    private void initComponents() {
        this.setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
        this.getRootPane().setWindowDecorationStyle(JRootPane.NONE);
        this.setTitle(NbBundle.getMessage (ProgressPanel.class,"TXT_ApplyingPathsTitle"));
        this.setModal(true);
        JComponent pane = (JComponent) this.getContentPane();
        panel = new JPanel(new BorderLayout());
        pPanel = new JPanel(new BorderLayout());
        pane.setLayout(new BorderLayout());
        this.progress = new JProgressBar();
        this.progress.setMinimum(0);
        this.progress.setMaximum(100);
        this.progress.setValue(0);
        
        
        labelScanning = new JLabel(" "); // NOI18N
        labelScanning.setBorder(new EmptyBorder(0, 0, 6, 0));
        panel.add(this.labelScanning, BorderLayout.NORTH);
        labelPackage = new JLabel(MAX_TEXT); // NOI18N
        panel.add(this.labelPackage, BorderLayout.SOUTH);
        
        pPanel.add(this.progress, BorderLayout.NORTH);
        labelNote = new JLabel(" "); // NOI18N
        pPanel.add(labelNote, BorderLayout.SOUTH);

        pane.add(panel, BorderLayout.NORTH);
        pleaseWait = new JLabel(NbBundle.getMessage(ProgressPanel.class, "MSG_PleaseWait"));
        pleaseWait.setHorizontalAlignment(SwingConstants.CENTER);
        pane.add(pleaseWait, BorderLayout.CENTER);
        pane.add(pPanel, BorderLayout.SOUTH);
        pane.setBorder(new EmptyBorder(12,12,3,11));
        
        this.setUndecorated(false);
        this.pack();
        this.setLocationRelativeTo(WindowManager.getDefault().getMainWindow());

        labelPackage.setText(" "); // NOI18N
        panel.setVisible(false);
        pPanel.setVisible(false);
    }

    private static ProgressPanel instance = null;
    
    public void startScanning(final boolean isInitial, final String cpRootName) {
        if (!SwingUtilities.isEventDispatchThread()) {
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    startScanning(isInitial, cpRootName);
                }
            });
            return;
        }
        pPanel.setVisible(true);
        panel.setVisible(true);
        pleaseWait.setVisible(false);
        if (isInitial) {
            labelNote.setText(NbBundle.getMessage(ProgressPanel.class, "MSG_InitialScanningNote"));
        }
        labelScanning.setText(formatMessage(NbBundle.getMessage(ProgressPanel.class, isInitial ? "MSG_InitialScanning" : "MSG_UpToDateCheck"), cpRootName));
    }
    
    public void startApplyingChanges() {
        if (!SwingUtilities.isEventDispatchThread()) {
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    startApplyingChanges();
                }
            });
            return;
        }
        labelScanning.setText(NbBundle.getMessage(ProgressPanel.class, "MSG_Applying"));
    }

    private String formatMessage(String message, String parameter) {
//        if (parameter.length() + message.length() > MAX_TEXT.length()) {
//            parameter = "..." + parameter.substring(parameter.length() + message.length() - MAX_TEXT.length());
//        }
        return MessageFormat.format(message, new Object[] {parameter});
    }
    
    public void updatePackage(final String packageName) {
        if (!SwingUtilities.isEventDispatchThread()) {
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    updatePackage(packageName);
                }
            });
            return;
        }
        labelPackage.setText(formatMessage(NbBundle.getMessage(ProgressPanel.class, "MSG_ScanningPackage"), packageName));
    }
    
    public void preBuildData() {
        if (!SwingUtilities.isEventDispatchThread()) {
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    preBuildData();
                }
            });
            return;
        }
        labelPackage.setText(NbBundle.getMessage(ProgressPanel.class, "MSG_ReadingClass"));
    }
    
    public static ProgressPanel getVisibleProgressPanel() {
        if (instance != null && instance.isVisible()) {
            return instance;
        }
        return null;
    }
    
    public static boolean openProgressDialog(JMManager model) {
        if (JMManager.SCAN_DEBUG) System.err.println("ProgressPanel: openProgressDialog"); // NOI18N
        instance = new ProgressPanel(model);
        instance.setVisible(true);
        instance = null;
        return true;
    }

}