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package org.netbeans.upgrade;
import java.beans.PropertyVetoException;
import java.io.*;
import java.net.URL;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JDialog;
import javax.swing.JOptionPane;
import org.netbeans.upgrade.systemoptions.Importer;
import org.netbeans.util.Util;
import org.openide.ErrorManager;
import org.openide.filesystems.FileUtil;
import org.openide.filesystems.LocalFileSystem;
import org.openide.filesystems.MultiFileSystem;
import org.openide.filesystems.XMLFileSystem;
import org.openide.modules.InstalledFileLocator;
import org.openide.util.Exceptions;
import org.openide.util.NbBundle;
import org.openide.util.Utilities;
import org.xml.sax.SAXException;

/** pending
 *
 * @author  Jiri Rechtacek, Jiri Skrivanek
 */
public final class AutoUpgrade {

    private static final Logger LOGGER = Logger.getLogger(AutoUpgrade.class.getName());

    public static void main (String[] args) throws Exception {
        // show warning if starts for the 1st time on changed userdir (see issue 196075)
        String noteChangedDefaults = "";
        if (madeObsoleteMessagesLog()) {
            noteChangedDefaults = NbBundle.getMessage (AutoUpgrade.class, "MSG_ChangedDefaults", System.getProperty ("netbeans.user", "")); // NOI18N
        }
        
        // try new place
        File sourceFolder = checkPreviousOnOsSpecificPlace (NEWER_VERSION_TO_CHECK);
        if (sourceFolder == null) {
            // try former place
            sourceFolder = checkPrevious (VERSION_TO_CHECK);
        }
        if (sourceFolder != null) {
            if (!showUpgradeDialog (sourceFolder, noteChangedDefaults)) {
                throw new org.openide.util.UserCancelException ();
            }
            copyToUserdir(sourceFolder);
            //migrates SystemOptions, converts them as a Preferences
            Importer.doImport();
        } else if (! noteChangedDefaults.isEmpty()) {
            // show a note only
            showNoteDialog(noteChangedDefaults);
        }
    }

    //#75324 NBplatform settings are not imported
    private static void upgradeBuildProperties(final File sourceFolder, final String[] version) throws IOException {
        File userdir = new File(System.getProperty("netbeans.user", ""));//NOI18N
        String[] regexForSelection = new String[]{
            "^nbplatform[.](?!default[.]netbeans[.]dest[.]dir).+[.].+=.+$", //NOI18N
            // #161616
            "^var[.].*"  //NOI18N
        };
        Copy.appendSelectedLines(new File(sourceFolder, "build.properties"), //NOI18N
                userdir, regexForSelection);
    }

    // the order of VERSION_TO_CHECK here defines the precedence of imports
    // the first one will be choosen for import
    final static private List<String> VERSION_TO_CHECK = 
            Arrays.asList (new String[] {".jmonkeyplatform/3.0Beta", ".jmonkeyplatform/3.0RC2", ".jmonkeyplatform/3.0RC3" });//".netbeans/7.1.2",  ".netbeans/7.1.1", ".netbeans/7.1", ".netbeans/7.0", ".netbeans/6.9" });//NOI18N
//            Arrays.asList (new String[] {"build/3.0RC2",  ".netbeans/7.1.1", ".netbeans/7.1", ".netbeans/7.0", ".netbeans/6.9" });//NOI18N
    
    // userdir on OS specific root of userdir (see issue 196075)
    static final List<String> NEWER_VERSION_TO_CHECK =
            Arrays.asList ("3.0RC3", "3.0RC2", "3.0Beta"/*7.2, ..."*/); //NOI18N

            
    private static File checkPreviousOnOsSpecificPlace (final List<String> versionsToCheck) {
        String defaultUserdirRoot = System.getProperty ("netbeans.default_userdir_root"); // NOI18N
        //normen: to test in ide
        if(defaultUserdirRoot == null){
            try {
                defaultUserdirRoot = new File(System.getProperty("netbeans.user")).getParentFile().getCanonicalPath();
            } catch (Exception ex) {
                Exceptions.printStackTrace(ex);
            }
        }
        LOGGER.log(Level.INFO, "determined userdir root of {0}", defaultUserdirRoot);
        File sourceFolder;
        if (defaultUserdirRoot != null) {
            File userHomeFile = new File (defaultUserdirRoot);
            for (String ver : versionsToCheck) {
                sourceFolder = new File (userHomeFile.getAbsolutePath (), ver);
                if (sourceFolder.exists () && sourceFolder.isDirectory ()) {
                    return sourceFolder;
                }
            }
        }
        return null;
    }

    static private File checkPrevious (final List<String> versionsToCheck) {        
        String userHome = System.getProperty ("user.home"); // NOI18N
        File sourceFolder = null;
        
        if (userHome != null) {
            File userHomeFile = new File (userHome);
            Iterator<String> it = versionsToCheck.iterator ();
            String ver;
            while (it.hasNext () && sourceFolder == null) {
                ver = it.next ();
                sourceFolder = new File (userHomeFile.getAbsolutePath (), ver);
                
                if (sourceFolder.isDirectory ()) {
                    break;
                }
                sourceFolder = null;
            }
            return sourceFolder;
        } else {
            return null;
        }
    }
    
    private static boolean madeObsoleteMessagesLog() {
        String ud = System.getProperty ("netbeans.user", "");
        if ((Utilities.isMac() || Utilities.isWindows()) && ud.endsWith(File.separator + "dev")) { // NOI18N
            String defaultUserdirRoot = System.getProperty ("netbeans.default_userdir_root", null); // NOI18N
            if (defaultUserdirRoot != null) {
                if (new File(ud).getParentFile().equals(new File(defaultUserdirRoot))) {
                    // check the former default root
                    String userHome = System.getProperty("user.home"); // NOI18N
                    if (userHome != null) {
                        File oldUserdir = new File(new File (userHome).getAbsolutePath (), ".netbeans/dev"); // NOI18N
                        if (oldUserdir.exists() && ! oldUserdir.equals(new File(ud))) {
                            // 1. modify messages log
                            File log = new File (oldUserdir, "/var/log/messages.log");
                            File obsolete = new File (oldUserdir, "/var/log/messages.log.obsolete");
                            if (! obsolete.exists() && log.exists()) {
                                return log.renameTo(obsolete);
                            }
                        }
                    }
                }
            }
        }
        return false;
    }
    
    private static boolean showUpgradeDialog (final File source, String note) {
        Util.setDefaultLookAndFeel();
        JOptionPane p = new JOptionPane (
            new AutoUpgradePanel (source.getAbsolutePath (), note),
            JOptionPane.QUESTION_MESSAGE,
            JOptionPane.YES_NO_OPTION
        );
        JDialog d = Util.createJOptionDialog(p, NbBundle.getMessage (AutoUpgrade.class, "MSG_Confirmation_Title"));
        d.setVisible (true);

        return new Integer (JOptionPane.YES_OPTION).equals (p.getValue ());
    }

    private static void showNoteDialog (String note) {
        Util.setDefaultLookAndFeel();
        JOptionPane p = new JOptionPane(new AutoUpgradePanel (null, note), JOptionPane.INFORMATION_MESSAGE, JOptionPane.DEFAULT_OPTION);
        JDialog d = Util.createJOptionDialog(p, NbBundle.getMessage (AutoUpgrade.class, "MSG_Note_Title"));
        d.setVisible (true);
    }

    static void doUpgrade (File source, String oldVersion) 
    throws java.io.IOException, java.beans.PropertyVetoException {        
        File userdir = new File(System.getProperty ("netbeans.user", "")); // NOI18N

        java.util.Set<?> includeExclude;
        try {
            Reader r = new InputStreamReader (
                    AutoUpgrade.class.getResourceAsStream ("copy" + oldVersion), // NOI18N
                    "utf-8"); // NOI18N
            includeExclude = IncludeExclude.create (r);
            r.close ();
        } catch (IOException ex) {
            throw new IOException("Cannot import from version: " + oldVersion, ex);
        }

        ErrorManager.getDefault ().log (
            ErrorManager.USER, "Import: Old version: " // NOI18N
            + oldVersion + ". Importing from " + source + " to " + userdir // NOI18N
        );
        
        File oldConfig = new File (source, "config"); // NOI18N
        org.openide.filesystems.FileSystem old;
        {
            LocalFileSystem lfs = new LocalFileSystem ();
            lfs.setRootDirectory (oldConfig);
            
            XMLFileSystem xmlfs = null;
            try {
                URL url = AutoUpgrade.class.getResource("layer" + oldVersion + ".xml"); // NOI18N
                xmlfs = (url != null) ? new XMLFileSystem(url) : null;
            } catch (SAXException ex) {
                throw new IOException("Cannot import from version: " + oldVersion, ex);
            }
            
            old = (xmlfs != null) ? createLayeredSystem(lfs, xmlfs) : lfs;
        }
        
        Copy.copyDeep (old.getRoot (), FileUtil.getConfigRoot (), includeExclude, PathTransformation.getInstance(oldVersion));
        
    }
    
    /* copy-pasted method doUpgrade and slightly modified to copy files relative
     * to userdir.
     */
    private static void doNonStandardUpgrade (File source,String oldVersion) 
            throws IOException, PropertyVetoException {
        File userdir = new File(System.getProperty("netbeans.user", "")); // NOI18N        
        java.util.Set<?> includeExclude;
        try {
            InputStream is = AutoUpgrade.class.getResourceAsStream("nonstandard" + oldVersion); // NOI18N
            if (is == null) {
                return;
            }
            Reader r = new InputStreamReader(is, "utf-8"); // NOI18N
            includeExclude = IncludeExclude.create(r);
            r.close();
        } catch (IOException ex) {
            throw new IOException("Cannot import from version: " +  oldVersion + "nonstandard", ex);
        }        
        ErrorManager.getDefault ().log (ErrorManager.USER, "Import: Old version: " // NOI18N
            + oldVersion + "nonstandard"  + ". Importing from " + source + " to " + userdir // NOI18N
        );        
        
        LocalFileSystem  old = new LocalFileSystem();
        old.setRootDirectory(source);
        
        LocalFileSystem nfs = new LocalFileSystem();
        nfs.setRootDirectory(userdir);                
        Copy.copyDeep(old.getRoot(), nfs.getRoot(), includeExclude, PathTransformation.getInstance(oldVersion));
    }    
    

    static MultiFileSystem createLayeredSystem(final LocalFileSystem lfs, final XMLFileSystem xmlfs) {
        MultiFileSystem old;
        
        old = new MultiFileSystem (
            new org.openide.filesystems.FileSystem[] { lfs, xmlfs }
        ) {
            {
                setPropagateMasks(true);
            }
        };
        return old;
    }

    /* Copy files from source folder to current userdir according to include/exclude
     * patterns in etc/netbeans.import file. */
    private static void copyToUserdir(File source) throws IOException, PropertyVetoException {
        File userdir = new File(System.getProperty("netbeans.user", "")); // NOI18N
        File netBeansDir = InstalledFileLocator.getDefault().locate("modules", null, false).getParentFile().getParentFile();  //NOI18N
        //normen
        File importFile = new File(netBeansDir, "etc/jmonkeyplatform.import");  //NOI18N
        LOGGER.fine("Import file: " + importFile);
        LOGGER.info("Importing from " + source + " to " + userdir); // NOI18N
        CopyFiles.copyDeep(source, userdir, importFile);
    }
}