/*

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 *   - Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer.

 *

 *   - Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution.

 *

 *   - Neither the name of Oracle nor the names of its

 *     contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

package com.sun.nio.zipfs;

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.FileStore;

import java.nio.file.FileSystems;

import java.nio.file.Path;

import java.nio.file.attribute.BasicFileAttributes;

import java.nio.file.attribute.FileAttributeView;

import java.nio.file.attribute.FileStoreAttributeView;

import java.nio.file.attribute.BasicFileAttributeView;

import java.util.Formatter;

/*

 *

 * @author  Xueming Shen, Rajendra Gutupalli, Jaya Hangal

 */

public class ZipFileStore extends FileStore {

    private final ZipFileSystem zfs;

    ZipFileStore(ZipPath zpath) {

        this.zfs = (ZipFileSystem)zpath.getFileSystem();

    }

    @Override

    public String name() {

        return zfs.toString() + "/";

    }

    @Override

    public String type() {

        return "zipfs";

    }

    @Override

    public boolean isReadOnly() {

        return zfs.isReadOnly();

    }

    @Override

    public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type) {

        return (type == BasicFileAttributeView.class ||

                type == ZipFileAttributeView.class);

    }

    @Override

    public boolean supportsFileAttributeView(String name) {

        return name.equals("basic") || name.equals("zip");

    }

    @Override

    @SuppressWarnings("unchecked")

    public <V extends FileStoreAttributeView> V getFileStoreAttributeView(Class<V> type) {

        if (type == null)

            throw new NullPointerException();

        return (V)null;

    }

    @Override

    public long getTotalSpace() throws IOException {

         return new ZipFileStoreAttributes(this).totalSpace();

    }

    @Override

    public long getUsableSpace() throws IOException {

         return new ZipFileStoreAttributes(this).usableSpace();

    }

    @Override

    public long getUnallocatedSpace() throws IOException {

         return new ZipFileStoreAttributes(this).unallocatedSpace();

    }

    @Override

    public Object getAttribute(String attribute) throws IOException {

         if (attribute.equals("totalSpace"))

               return getTotalSpace();

         if (attribute.equals("usableSpace"))

               return getUsableSpace();

         if (attribute.equals("unallocatedSpace"))

               return getUnallocatedSpace();

         throw new UnsupportedOperationException("does not support the given attribute");

    }

    private static class ZipFileStoreAttributes {

        final FileStore fstore;

        final long size;

        public ZipFileStoreAttributes(ZipFileStore fileStore)

            throws IOException

        {

            Path path = FileSystems.getDefault().getPath(fileStore.name());

            this.size = Files.size(path);

            this.fstore = Files.getFileStore(path);

        }

        public long totalSpace() {

            return size;

        }

        public long usableSpace() throws IOException {

            if (!fstore.isReadOnly())

                return fstore.getUsableSpace();

            return 0;

        }

        public long unallocatedSpace()  throws IOException {

            if (!fstore.isReadOnly())

                return fstore.getUnallocatedSpace();

            return 0;

        }

    }

}