/*
 * Copyright 2014 The Codehaus Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.codehaus.plexus.archiver.resources;

import javax.annotation.Nonnull;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import org.codehaus.plexus.components.io.attributes.AttributeUtils;
import org.codehaus.plexus.components.io.attributes.PlexusIoResourceAttributes;
import org.codehaus.plexus.components.io.functions.ResourceAttributeSupplier;
import org.codehaus.plexus.components.io.resources.AbstractPlexusIoResource;

/**
 * A file resource that does not necessarily exist (anywhere).
 */
public class PlexusIoVirtualFileResource extends AbstractPlexusIoResource implements ResourceAttributeSupplier {

    private final File file;

    protected PlexusIoVirtualFileResource(File file, String name) {
        super(name, file.lastModified(), file.length(), file.isFile(), file.isDirectory(), file.exists());
        this.file = file;
    }

    protected static String getName(File file) {
        return file.getPath().replace('\\', '/');
    }

    /**
     * Returns the resources file.
     */
    public File getFile() {
        return file;
    }

    @Nonnull
    @Override
    public InputStream getContents() throws IOException {
        throw new UnsupportedOperationException("We're not really sure we can do this");
    }

    @Override
    public URL getURL() throws IOException {
        return getFile().toURI().toURL();
    }

    @Override
    public long getSize() {
        return getFile().length();
    }

    @Override
    public boolean isDirectory() {
        return getFile().isDirectory();
    }

    @Override
    public boolean isExisting() {
        return getFile().exists();
    }

    @Override
    public boolean isFile() {
        return getFile().isFile();
    }

    @Override
    public PlexusIoResourceAttributes getAttributes() {
        return null;
    }

    @Override
    public long getLastModified() {
        if (file.exists()) {
            return AttributeUtils.getLastModified(getFile());
        } else {
            return System.currentTimeMillis();
        }
    }

    @Override
    public boolean isSymbolicLink() {
        return getAttributes().isSymbolicLink();
    }
}
