/*
 * Copyright 2014 Skynav, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY SKYNAV, INC. AND ITS 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 SKYNAV, INC. OR ITS 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.skynav.ttv.util;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.Collections;
import java.util.Map;

public class ConfigurationDefaults {
    private static final Map<String,String> emptyDefaults = Collections.unmodifiableMap(new java.util.HashMap<String,String>());
    private URL locator;
    public ConfigurationDefaults() {
        this(null);
    }
    public ConfigurationDefaults(URL locator) {
        this.locator = locator;
    }
    public URL getConfigurationLocator() {
        return locator;
    }
    public String getConfigurationDirectory() {
        return getConfigurationDirectory(locator);
    }
    public Map<String,String> getDefaults() {
        return emptyDefaults;
    }
    public String getDefault(String name) {
        return getDefaults().get(name);
    }
    public void populateDefaults(Map<String,String> options) {
        options.putAll(getDefaults());
    }
    public static String getConfigurationDirectory(URL url) {
        try {
            if (url == null)
                url = new File(".").toURI().toURL();
            String path = url.toURI().getPath();
            if (path != null) {
                int i = path.lastIndexOf('/');
                if (i >= 0)
                    return path.substring(0, i);
                else
                    return path;
            } else
                return null;
        } catch (MalformedURLException e) {
            throw new RuntimeException(e);
        } catch (URISyntaxException e) {
            throw new RuntimeException(e);
        }
    }
}