/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2007-2015 Broad Institute
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package org.broad.igv.feature.tribble.reader;

import htsjdk.samtools.util.FileExtensions;
import htsjdk.samtools.util.IOUtil;
import htsjdk.tribble.AbstractFeatureReader;
import htsjdk.tribble.util.ParsingUtils;

import java.io.IOException;

public class IGVComponentMethods extends AbstractFeatureReader.ComponentMethods {


    private static  IGVComponentMethods instance;

    public static IGVComponentMethods getInstance() {
        if(instance == null) {
            instance = new IGVComponentMethods();
        }
        return instance;
    }

    private IGVComponentMethods() {}

    public boolean isTabix(String resourcePath, String indexPath) throws IOException {

        boolean isRemote = (resourcePath.startsWith("gs://") || resourcePath.startsWith("http://") || resourcePath.startsWith("https://"));

        if(isRemote) {
            return indexPath != null && IOUtil.hasBlockCompressedExtension(resourcePath);
        }
        else {
            if (indexPath == null & !isRemote) {
                indexPath = ParsingUtils.appendToPath(resourcePath, FileExtensions.TABIX_INDEX);
            }
            return indexPath != null && IOUtil.hasBlockCompressedExtension(resourcePath) && ParsingUtils.resourceExists(indexPath);
        }
    }

}
