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// Copyright <2018> 

// 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 com.arpitos.utils;

import java.io.File;
import java.io.IOException;
import java.nio.file.CopyOption;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;

/**
 * 
 * 
 *
 */
public class UtilsFile {

	/**
	 * Copy Directory from source to destination location
	 * 
	 * @param src
	 *            source file location
	 * @param dest
	 *            destination file location
	 * @param overwrite
	 *            enable overwrite true|false
	 */
	public static void copyDir(String src, String dest, boolean overwrite) {
		try {
			Files.walk(Paths.get(src)).forEach(a -> {
				Path b = Paths.get(dest, a.toString().substring(src.length()));
				try {
					if (!a.toString().equals(src))
						Files.copy(a, b, overwrite ? new CopyOption[] { StandardCopyOption.REPLACE_EXISTING } : new CopyOption[] {});
				} catch (IOException e) {
					e.printStackTrace();
				}
			});
		} catch (IOException e) {
			// permission issue
			e.printStackTrace();
		}
	}

	/**
	 * Deletes all the content of the directory if present, If directory is not
	 * present and user has chosen appropriate flag then creates empty
	 * directory(s)
	 * 
	 * 	 * {@code
	 * Example : cleanDir(new File("./conf", true);
	 * }
	 * 
	 * 
	 * @param dir
	 *            Target directory
	 * @param createIfNotPresent
	 *            Boolean flag which enables directory creation if not already
	 *            present
	 */
	public static void cleanDir(File dir, boolean createIfNotPresent) {
		if (dir.exists() && dir.isDirectory()) {
			cleanDir(dir);
		}
		dir.mkdirs();
	}

	private static void cleanDir(File dir) {
		for (File file : dir.listFiles()) {
			if (file.isDirectory()) {
				cleanDir(file);
			}
			file.delete();
		}
	}

	/**
	 * Copy File from source to destination location
	 * 
	 * @param source
	 *            source file location
	 * @param dest
	 *            destination file location
	 * @param overwrite
	 *            enable overwrite true|false
	 * @throws Exception
	 *             if file io fails
	 */
	public static void copyFile(File source, File dest, boolean overwrite) throws Exception {
		Files.copy(source.toPath(), dest.toPath(), overwrite ? new CopyOption[] { StandardCopyOption.REPLACE_EXISTING } : new CopyOption[] {});
	}

}