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package com.emc.mongoose.common.env;

import java.io.File;
import java.net.URI;
import java.net.URISyntaxException;

/**
 Created by kurila on 03.11.16.
 */
public interface PathUtil {

	static String getBaseDir() {
		return getBasePathForClass(PathUtil.class);
	}

	static URI getBaseUriForClass(final Class cls)
	throws URISyntaxException {
		return cls.getProtectionDomain().getCodeSource().getLocation().toURI();
	}

	// http://stackoverflow.com/a/29665447
	static String getBasePathForClass(final Class cls) {
		try {
			File basePath;
			final File clsFile = new File(getBaseUriForClass(cls).getPath());
			if(
				clsFile.isFile() ||
				clsFile.getPath().endsWith(".jar") ||
				clsFile.getPath().endsWith(".zip")
			) {
				basePath = clsFile.getParentFile();
			} else {
				basePath = clsFile;
			}
			String basePathStr = basePath.toString();
			// bandage for eclipse
			if(
				basePathStr.endsWith(File.separator + "lib") ||
				basePathStr.endsWith(File.separator + "bin") ||
				basePathStr.endsWith("bin" + File.separator) ||
				basePathStr.endsWith("lib" + File.separator)
			) {
				basePath = basePath.getParentFile();
			}
			// bandage for netbeans
			if(basePathStr.endsWith(File.separator + "build" + File.separator + "classes")) {
				basePath = basePath
					.getParentFile()
					.getParentFile();
			}
			// bandage for idea
			if(basePathStr.endsWith(File.separator + "build" + File.separator + "classes" + File.separator + "main")) {
				basePath = basePath
					.getParentFile()
					.getParentFile()
					.getParentFile()
					.getParentFile();
			}
			// bandage for gradle
			if(basePathStr.endsWith(File.separator + "build" + File.separator + "libs")) {
				basePath = basePath
					.getParentFile()
					.getParentFile()
					.getParentFile();
			}
			// final fix
			basePathStr = basePath.toString();
			if(!basePathStr.endsWith(File.separator)) {
				basePathStr = basePath + File.separator;
			}
			return basePathStr;
		} catch(final URISyntaxException e) {
			throw new RuntimeException("Cannot figure out base path for class: " + cls.getName());
		}
	}
}