/*
 *                 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 1997-2004 Sun
 * Microsystems, Inc. All Rights Reserved.
 */

package org.netbeans.modules.refactoring.ui;

import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.BeanInfo;
import java.io.File;
import java.io.IOException;
import java.util.*;
import javax.swing.*;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.plaf.basic.BasicComboBoxRenderer;
import org.netbeans.api.java.project.JavaProjectConstants;
import org.netbeans.api.project.*;
import org.netbeans.api.project.ui.OpenProjects;
import org.netbeans.modules.refactoring.api.ui.ParametersPanel;
import org.netbeans.spi.java.project.support.ui.PackageView;
import org.netbeans.spi.project.ActionProvider;
import org.openide.filesystems.FileObject;
import org.openide.filesystems.FileUtil;
import org.openide.loaders.DataObject;
import org.openide.nodes.Children;
import org.openide.nodes.Node;
import org.openide.util.Lookup;
import org.openide.util.NbBundle;
import org.openide.util.Utilities;
import org.openide.util.Lookup.Template;

/**
 *
 * @author  Jan Becicka
 */
public class MoveClassPanel extends JPanel implements ActionListener, DocumentListener {
  
    private static final ListCellRenderer CELL_RENDERER = new NodeCellRenderer();
    private static final ListCellRenderer PROJECT_CELL_RENDERER = new ProjectCellRenderer();
    
    private Project project;
    private ModelItem[] groupItems;
    private ParametersPanel parent;
    private FileObject fo;
    
    /** Creates new form SimpleTargetChooserGUI */
    public MoveClassPanel(final ParametersPanel parent, String title, String headline, String startPackage, FileObject f) {
        setName(title);
        this.fo = f;
        this.parent = parent;
        initComponents();
        setCombosEnabled(true);
        setThisClassVisible(false);
        labelHeadLine.setText(headline);
        
        rootComboBox.setRenderer( CELL_RENDERER );
        packageComboBox.setRenderer( CELL_RENDERER );
        projectsComboBox.setRenderer( PROJECT_CELL_RENDERER );
                
        rootComboBox.addActionListener( this );
        packageComboBox.addActionListener( this );
        projectsComboBox.addActionListener( this );
        
        Object textField = packageComboBox.getEditor().getEditorComponent();
        if (textField instanceof JTextField) {
            ((JTextField) textField).getDocument().addDocumentListener(this); 
        }
        
        project = preselectedProject();
        initValues(startPackage);
    }
    
    public void initValues(String preselectedFolder ) {
        
        Project openProjects[] = OpenProjects.getDefault().getOpenProjects();
        DefaultComboBoxModel projectsModel = new DefaultComboBoxModel( openProjects );
        projectsComboBox.setModel( projectsModel );                
        projectsComboBox.setSelectedItem( project );
        
        updateRoots();
        updatePackages(); 
        if (preselectedFolder != null) {
            packageComboBox.setSelectedItem(preselectedFolder);
        }
        // Determine the extension
    }
    
    public void requestFocus() {
        packageComboBox.requestFocus();
    }
    
    public FileObject getRootFolder() {
        return ((ModelItem)rootComboBox.getSelectedItem()).group.getRootFolder();
    }
    
    public String getPackageName() {
        String packageName = packageComboBox.getEditor().getItem().toString().trim();
        if (NbBundle.getMessage(MoveClassPanel.class, "LBL_DefaultPackage").equals (packageName))
            packageName = "";
        if (NbBundle.getMessage(PackageView.class, "LBL_DefaultPackage").equals(packageName)) {
            packageName = "";
        }
        return  packageName.replace( '.', '/' ); // NOI18N
    }
    
    private void fireChange() {
        parent.stateChanged(null);
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    private void initComponents() {//GEN-BEGIN:initComponents
        java.awt.GridBagConstraints gridBagConstraints;

        labelProject = new javax.swing.JLabel();
        projectsComboBox = new javax.swing.JComboBox();
        labelLocation = new javax.swing.JLabel();
        rootComboBox = new javax.swing.JComboBox();
        labelPackage = new javax.swing.JLabel();
        packageComboBox = new javax.swing.JComboBox();
        labelHeadLine = new javax.swing.JLabel();
        bottomPanel = new javax.swing.JPanel();
        thisClassLabel = new javax.swing.JLabel();
        thisClassTextField = new javax.swing.JTextField();

        setLayout(new java.awt.GridBagLayout());

        labelProject.setLabelFor(projectsComboBox);
        org.openide.awt.Mnemonics.setLocalizedText(labelProject, org.openide.util.NbBundle.getMessage(MoveClassPanel.class, "LBL_Project"));
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 6, 0);
        add(labelProject, gridBagConstraints);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(0, 6, 6, 0);
        add(projectsComboBox, gridBagConstraints);
        projectsComboBox.getAccessibleContext().setAccessibleDescription(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("ACSD_projectsCombo"));

        labelLocation.setLabelFor(rootComboBox);
        org.openide.awt.Mnemonics.setLocalizedText(labelLocation, org.openide.util.NbBundle.getMessage(MoveClassPanel.class, "LBL_Location"));
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 2;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 6, 0);
        add(labelLocation, gridBagConstraints);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 2;
        gridBagConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(0, 6, 6, 0);
        add(rootComboBox, gridBagConstraints);
        rootComboBox.getAccessibleContext().setAccessibleDescription(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("ACSD_rootCombo"));

        labelPackage.setLabelFor(packageComboBox);
        org.openide.awt.Mnemonics.setLocalizedText(labelPackage, org.openide.util.NbBundle.getMessage(MoveClassPanel.class, "LBL_ToPackage"));
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 3;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 6, 0);
        add(labelPackage, gridBagConstraints);

        packageComboBox.setEditable(true);
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 3;
        gridBagConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(0, 6, 6, 0);
        add(packageComboBox, gridBagConstraints);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.gridwidth = 2;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 6, 0);
        add(labelHeadLine, gridBagConstraints);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 5;
        gridBagConstraints.gridwidth = 2;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.weighty = 1.0;
        add(bottomPanel, gridBagConstraints);

        org.openide.awt.Mnemonics.setLocalizedText(thisClassLabel, org.openide.util.NbBundle.getMessage(MoveClassPanel.class, "LBL_ThisClass"));
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 4;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 12, 0);
        add(thisClassLabel, gridBagConstraints);

        thisClassTextField.setEditable(false);
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 4;
        gridBagConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(0, 6, 12, 0);
        add(thisClassTextField, gridBagConstraints);

    }//GEN-END:initComponents

    
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    protected javax.swing.JPanel bottomPanel;
    private javax.swing.JLabel labelHeadLine;
    private javax.swing.JLabel labelLocation;
    private javax.swing.JLabel labelPackage;
    private javax.swing.JLabel labelProject;
    private javax.swing.JComboBox packageComboBox;
    private javax.swing.JComboBox projectsComboBox;
    private javax.swing.JComboBox rootComboBox;
    private javax.swing.JLabel thisClassLabel;
    private javax.swing.JTextField thisClassTextField;
    // End of variables declaration//GEN-END:variables

    // ActionListener implementation -------------------------------------------
        
    public void actionPerformed(ActionEvent e) {
        if (projectsComboBox == e.getSource()) {
            project = (Project) projectsComboBox.getSelectedItem();
            updateRoots();
            updatePackages();
        } else 
        if ( rootComboBox == e.getSource() ) {            
            updatePackages();
        }
        else if ( packageComboBox == e.getSource() ) {
        }
    }    
    
    // DocumentListener implementation -----------------------------------------
    
    public void changedUpdate(DocumentEvent e) {                
        fireChange();        
    }    
    
    public void insertUpdate(DocumentEvent e) {
        fireChange();        
    }
    
    public void removeUpdate(DocumentEvent e) {
        fireChange();        
    }
    
    // Private methods ---------------------------------------------------------
        
    private void updatePackages() {
        packageComboBox.setModel( new DefaultComboBoxModel( ((ModelItem)rootComboBox.getSelectedItem()).getChildren() ) );        
    }
    
    void setCombosEnabled(boolean enabled) {
        packageComboBox.setEnabled(enabled);
        rootComboBox.setEnabled(enabled);
        projectsComboBox.setEnabled(enabled);
    }
    
    void setThisClassVisible(boolean visible) {
        thisClassLabel.setVisible(visible);
        thisClassTextField.setVisible(visible);
    }
    
    void setThisClassName(String name) {
        thisClassTextField.setText(name);
    }
    
    private void updateRoots() {
        Sources sources = ProjectUtils.getSources(project);
        SourceGroup[] groups = sources.getSourceGroups(JavaProjectConstants.SOURCES_TYPE_JAVA);
        if (groups == null) {
            groups = sources.getSourceGroups( Sources.TYPE_GENERIC ); 
        }

        
        this.groupItems = new ModelItem[ groups.length ]; 
        int preselectedItem = 0;
        for( int i = 0; i < groups.length; i++ ) {
            this.groupItems[i] = new ModelItem( groups[i] );
            if (fo!=null) {
                try {
                    if (groups[i].contains(fo)) {
                        preselectedItem = i;
                    }
                } catch (IllegalArgumentException e) {
                }
            }
        }
                
        // Setup comboboxes 
        rootComboBox.setModel( new DefaultComboBoxModel( this.groupItems ) );
        rootComboBox.setSelectedIndex(preselectedItem);
    }
    
    public File getFolder() {
        FileObject rootFo = getRootFolder();
        File rootFile = FileUtil.toFile( rootFo );
        if ( rootFile == null ) {
            return null;
        }        
        String packageFileName = getPackageName().replace('.','/');        
        File folder = new File( rootFile, packageFileName );
//        try {
//            folder.mkdir();
//        } catch (SecurityException e) {
//            
//        }
        return folder;
    }
    
    // Private innerclasses ----------------------------------------------------
    
    private static class ModelItem {
        
        private Node node;        
        private SourceGroup group;
        private Icon icon;
        private ModelItem[] children;
	
        // For source groups
        public ModelItem( SourceGroup group ) {            
            this.group = group;
            this.icon = null; // XXX Should be group getIcon() 
        }
        
        // For packages
        public ModelItem( Node node ) {
            this.node = node;
            this.icon = new ImageIcon( node.getIcon( BeanInfo.ICON_COLOR_16x16 ) );
        }
        
	public String getDisplayName() {
            if ( group != null ) {
                return group.getDisplayName();
            }
            else {
                return node.getName();
            }
        }
	
        public Icon getIcon() {
            return icon;
        }
        
        public String toString() {
            return getDisplayName();
        }
        
        public ModelItem[] getChildren() {
            if ( group == null ) {
                return null;
            }
            else {
                if ( children == null ) {
                    Children ch = PackageView.createPackageView(group).getChildren();
                    Node nodes[] = ch.getNodes( true );
                    children = new ModelItem[ nodes.length ];
                    for( int i = 0; i < nodes.length; i++ ) {
                        children[i] = new ModelItem( nodes[i] );
                    }
                }
                return children;
            }
        }
        
    }
    
    private Project preselectedProject() {
        Lookup context = Utilities.actionsGlobalContext();
        Project preselectedProject = null;
        
        // if ( activatedNodes != null && activatedNodes.length != 0 ) {
        
        Project[] projects = getProjectsFromLookup( context, null );
        if ( projects.length > 0 ) {
            preselectedProject = projects[0];
        }
        
        
        if ( preselectedProject == null ) {
                preselectedProject = OpenProjects.getDefault().getOpenProjects()[0];
        }
        
        if ( preselectedProject == null ) {
            assert false : "Action should be disabled"; // NOI18N
        }
        
        return preselectedProject;
    }
    
    private static Project[] getProjectsFromLookup( Lookup lookup, String command ) {
        
        Set result = new HashSet();
        
        // First find out whether there is a project directly in the Lookup
        Collection projects = lookup.lookup( new Template( Project.class ) ).allInstances();
        for( Iterator it = projects.iterator(); it.hasNext(); ) {
            Project p = (Project)it.next();
            if (command == null || commandSupported(p, command, lookup)) {
                result.add(p);
            }
        }
        
        // Now try to guess the project from dataobjects
        Collection dataObjects = lookup.lookup( new Template( DataObject.class ) ).allInstances();
        for( Iterator it = dataObjects.iterator(); it.hasNext(); ) {
            
            DataObject dObj = (DataObject)it.next();
            FileObject fObj = dObj.getPrimaryFile();
            Project p = FileOwnerQuery.getOwner(fObj);
            if ( p != null ) {
                if ( command != null && !commandSupported( p, command, lookup ) ) {
                    continue;
                }
                result.add( p );
            }
            
        }
        
        Project[] projectsArray = new Project[ result.size() ];
        result.toArray( projectsArray );
        return projectsArray;
    }
    
    /**
     * Tests whether given command is available on the project and whether
     * the action as to be enabled in current Context
     * @param project Project to test
     * @param command Command for test
     * @param context Lookup representing current context or null if context
     *                does not matter.
     */
    private static boolean commandSupported( Project project, String command, Lookup context ) {
        //We have to look whether the command is supported by the project
        ActionProvider ap = (ActionProvider)project.getLookup().lookup( ActionProvider.class );
        if ( ap != null ) {
            List commands = Arrays.asList( ap.getSupportedActions() );
            if ( commands.contains( command ) ) {
                if (context == null || ap.isActionEnabled(command, context)) {
                    return true;
                }
            }
        }
        return false;
    }
    
    private static class NodeCellRenderer extends BasicComboBoxRenderer implements ListCellRenderer {
        
        public Component getListCellRendererComponent(
            JList list,
            Object value,
            int index,
            boolean isSelected,
            boolean cellHasFocus) {
        
            BasicComboBoxRenderer cbr = (BasicComboBoxRenderer)super.getListCellRendererComponent( list, value, index, isSelected, cellHasFocus );   
            
            if ( value != null ) {
                ModelItem item = (ModelItem)value;
                cbr.setText( item.getDisplayName() );
                cbr.setIcon( item.getIcon() );
            }
            return cbr;
        }
    }
    
    private static class ProjectCellRenderer extends BasicComboBoxRenderer implements ListCellRenderer {
        
        public Component getListCellRendererComponent(
            JList list,
            Object value,
            int index,
            boolean isSelected,
            boolean cellHasFocus) {
        
            BasicComboBoxRenderer cbr = (BasicComboBoxRenderer)super.getListCellRendererComponent( list, value, index, isSelected, cellHasFocus );   
            
            if ( value != null ) {
                ProjectInformation pi = ProjectUtils.getInformation((Project)value);
                cbr.setText(pi.getDisplayName());
                cbr.setIcon(pi.getIcon());
            }
            return cbr;
        }
    }
}