package org.netbeans.modules.tasklist.copyright;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.UIManager;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;

import org.netbeans.modules.tasklist.client.Suggestion;
import org.netbeans.modules.tasklist.client.SuggestionPerformer;
import org.netbeans.modules.tasklist.core.ConfPanel;
import org.netbeans.modules.tasklist.core.TLUtils;
import org.netbeans.modules.tasklist.providers.SuggestionContext;
import org.openide.DialogDisplayer;
import org.openide.ErrorManager;
import org.openide.NotifyDescriptor;
import org.openide.util.NbBundle;

/**
 * SuggestionPerformer for adding copyright
 *
 * @author Tor Norbye
 * @author Tim Lebedkov
 */
public class AddCopyrightPerformer implements SuggestionPerformer {
    private SuggestionContext env;

    /** For some file formats comment must be inseretd into middle of file. */
    private int prologEnd = 0;

    /**
     * todo
     */
    public AddCopyrightPerformer(SuggestionContext env) {
        this.env = env;
    }
    
    public void perform(Suggestion s) {
        String comment = getComment(false);
        if ((comment != null) && (comment.length() > 0)) {
            try {
                env.getDocument().insertString(prologEnd, comment, null);
            } catch (BadLocationException e) {
                ErrorManager.getDefault().notify(
                ErrorManager.WARNING, e);
            }
            // TODO Should I put a message in the status
            // window which tells you how to change the
            // copyright that is used?
        } else {
            JTextArea labelArea = new JTextArea();
            labelArea.setWrapStyleWord(true);
            labelArea.setLineWrap(true);
            labelArea.setEditable(false);
            labelArea.setText(
            NbBundle.getMessage(CopyrightChecker.class,
                "NoChosenCopyright")); // NOI18N
            labelArea.setBackground((Color) UIManager.getDefaults().get(
                "Label.background")); // NOI18N
            JTextArea textArea = new JTextArea();
            textArea.setRows(8);
            String sample = getSampleLicense();
            textArea.setText(sample);
            textArea.select(0, sample.length());
            JScrollPane pane = new JScrollPane(textArea);
            // TODO: add text area to panel!
            
            JPanel body = new JPanel();
            body.setLayout(new BorderLayout());
            body.add(labelArea, BorderLayout.NORTH);
            body.add(pane, BorderLayout.CENTER);
            body.setPreferredSize(new Dimension(400, 300));
            NotifyDescriptor nd =
            new NotifyDescriptor.Confirmation(
                body,
                NotifyDescriptor.OK_CANCEL_OPTION
            );
            Object result =
            DialogDisplayer.getDefault().notify(nd);
            if (NotifyDescriptor.OK_OPTION == result) {
                String copyright = textArea.getText().trim();
                if (copyright.length() > 0) {
                    CopyrightSettings settings =
                    (CopyrightSettings) CopyrightSettings.findObject(
                    CopyrightSettings.class, true);
                    settings.setScanCopyright(copyright);
                    // recurse!
                    perform(s);
                }
            }
        }
    }
    
    private String getCopyright() {
        CopyrightSettings settings =
            (CopyrightSettings) CopyrightSettings.findObject(CopyrightSettings.class, true);
        String copyright = settings.getScanCopyright();
        return copyright;
    }

    /** Side effect sets prologEnd */
    private String getComment(boolean makeHtml) {
        String copyright = getCopyright();
        prologEnd = 0;
        if ((copyright == null) || (copyright.length() == 0)) {
            return null;
        }
        String prefix = "";
        String suffix = "";
        String linefix = null;
        String ext = env.getFileObject().getExt();
        if (ext.equalsIgnoreCase("java") || // NOI18N
        ext.equalsIgnoreCase("cc") || // NOI18N
        ext.equalsIgnoreCase("cpp")) {  // NOI18N
            linefix = "//"; // NOI18N
            prefix = "/*"; // NOI18N
            suffix = "*/"; // NOI18N
        } else if (ext.equalsIgnoreCase("html") || // NOI18N
            ext.equalsIgnoreCase("htm") || // NOI18N
            ext.equalsIgnoreCase("xml")) {  // NOI18N
            prefix = ""; // NOI18N

            // #45151 for XML  prolog must be the first
            // XXX works well only for ASCI based encodings, EBDIC ignored
            Document doc = env.getDocument();
            int prologLength = Math.max(doc.getLength(), 80);
            try {
                String prolog = doc.getText(0, prologLength);
                if (prolog.startsWith("");
                    if (end != -1) {
                        prologEnd =  end + 2;
                        prefix = "\n