/***** BEGIN LICENSE BLOCK *****
 * Version: CPL 1.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Common Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.eclipse.org/legal/cpl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2006 Ola Bini <ola@ologix.com>
 * 
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the CPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the CPL, the GPL or the LGPL.
 ***** END LICENSE BLOCK *****/
/**
 * $Id$
 */
package org.jruby.util;

import java.io.File;
import java.io.FileFilter;
import java.io.FilenameFilter;
import java.io.IOException;

/**
 * <p>This file acts as an alternative to NormalizedFile, due to the problems with current working 
 * directory.</p>
 *
 */
public class JRubyFile extends File {
    private static final long serialVersionUID = 435364547567567L;

    public static JRubyFile create(String cwd, String pathname) {
        if (pathname == null || pathname.equals("")) {
            return JRubyNonExistentFile.NOT_EXIST;
        }
        File internal = new File(pathname);
        if(!internal.isAbsolute()) {
            internal = new File(cwd,pathname);
            if(!internal.isAbsolute()) {
                throw new IllegalArgumentException("Neither current working directory ("+cwd+") nor pathname ("+pathname+") led to an absolute path");
            }
        }
        return new JRubyFile(internal);
    }

    public static String getFileProperty(String property) {
        String value = System.getProperty(property);
        
        return value.replace(File.separatorChar, '/');
    }

    private JRubyFile(File file) {
        this(file.getAbsolutePath());
    }

    protected JRubyFile(String filename) {
        super(filename);
    }

    public String getAbsolutePath() {
        return new File(super.getPath()).getAbsolutePath().replace(File.separatorChar, '/'); 
    }

    public String getCanonicalPath() throws IOException {
        String canonicalPath = super.getCanonicalPath().replace(File.separatorChar, '/');
        
        // Java 1.4 canonicalPath does not strip off '.'
        if (canonicalPath.endsWith("/.")) {
            canonicalPath = canonicalPath.substring(0, canonicalPath.length() - 1);
        }
        
        return canonicalPath;
    }

    public String getPath() {
        return super.getPath().replace(File.separatorChar, '/');
    }

    public String toString() {
        return super.toString().replace(File.separatorChar, '/');
    }

    public File getAbsoluteFile() {
        return new JRubyFile(getAbsolutePath());
    }

    public File getCanonicalFile() throws IOException {
        return new JRubyFile(getCanonicalPath());
    }

    public String getParent() {
        String par = super.getParent();
        if (par != null) {
            par = par.replace(File.separatorChar, '/');
        }
        return par;
    }

    public File getParentFile() {
        String par = getParent();
        if (par == null) {
            return this;
        } else {
            return new JRubyFile(par);
        }
    }
    
    public static File[] listRoots() {
        File[] roots = File.listRoots();
        JRubyFile[] smartRoots = new JRubyFile[roots.length];
        for(int i = 0, j = roots.length; i < j; i++) {
            smartRoots[i] = new JRubyFile(roots[i].getPath());
        }
        return smartRoots;
    }
    
    public static File createTempFile(String prefix, String suffix, File directory) throws IOException {
        return new JRubyFile(File.createTempFile(prefix, suffix,directory));
    }
    
    public static File createTempFile(String prefix, String suffix) throws IOException {
        return new JRubyFile(File.createTempFile(prefix, suffix));
    }

    public String[] list(FilenameFilter filter) {
        String[] files = super.list(filter);
        if (files == null) {
            return null;
        }
        
        String[] smartFiles = new String[files.length];
        for (int i = 0; i < files.length; i++) {
            smartFiles[i] = files[i].replace(File.separatorChar, '/');
        }
        return smartFiles;
    }

    public File[] listFiles() {
        File[] files = super.listFiles();
        if (files == null) {
            return null;
        }
        
        JRubyFile[] smartFiles = new JRubyFile[files.length];
        for (int i = 0, j = files.length; i < j; i++) {
            smartFiles[i] = create(super.getAbsolutePath(),files[i].getPath());
        }
        return smartFiles;
    }

    public File[] listFiles(final FileFilter filter) {
        final File[] files = super.listFiles(filter);
        if (files == null) {
            return null;
        }
        
        JRubyFile[] smartFiles = new JRubyFile[files.length];
        for (int i = 0,j = files.length; i < j; i++) {
            smartFiles[i] = create(super.getAbsolutePath(),files[i].getPath());
        }
        return smartFiles;
    }

    public File[] listFiles(final FilenameFilter filter) {
        final File[] files = super.listFiles(filter);
        if (files == null) {
            return null;
        }
        
        JRubyFile[] smartFiles = new JRubyFile[files.length];
        for (int i = 0,j = files.length; i < j; i++) {
            smartFiles[i] = create(super.getAbsolutePath(),files[i].getPath());
        }
        return smartFiles;
    }
}