/*
 * Copyright (C) 2016 Didier Clermonté <dclermonte@april.org>
 * Copyright (C) 2016 Christian Pierre Momon <christian.momon@devinsy.fr>
 *
 * This file is part of Siba.
 *
 * Siba is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.dclermonte.siba.cli;

import java.io.File;
import java.util.ResourceBundle;

import org.apache.commons.lang3.StringUtils;
import org.dclermonte.siba.SibaException;
import org.dclermonte.siba.model.SibaManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * This class CLI is for use from Command Line Interface.
 *
 *
 */
public class SibaCLI
{
	private static Logger logger = LoggerFactory.getLogger(SibaCLI.class);
	private static final ResourceBundle BUNDLE = ResourceBundle.getBundle("org.dclermonte.siba.cli.messages"); //$NON-NLS-1$

	private SibaCLI()
	{

	}

	public static void backup(final File directoryToSave) throws SibaException
	{
		File result;
		result = SibaManager.backup(directoryToSave);
		System.out.println(BUNDLE.getString("confirmDialog.text") + result.getName()); //$NON-NLS-1$
	}

	/**
	 *
	 * This method is called for Backup from CLI.
	 *
	 * @param directoryToSave
	 * @param targetDirectory
	 * @throws SibaException
	 */
	public static void backup(final File directoryToSave, final File targetDirectory) throws SibaException
	{
		File result;
		result = SibaManager.backup(directoryToSave, targetDirectory);
		System.out.println(BUNDLE.getString("confirmDialog.text") + result.getName()); //$NON-NLS-1$
	}

	/**
	 *
	 * This method is called for Check from CLI. anObject
	 *
	 * @param fileToCheck
	 * @throws SibaException
	 */
	public static void check(final File fileToCheck) throws SibaException
	{
		boolean result;
		result = SibaManager.check(fileToCheck);
		if (result)
		{
			String message = String.format(BUNDLE.getString("confirmDialogGood.text"), fileToCheck.getName());
			System.out.println(message);
		}
		else
		{
			String message = String.format(BUNDLE.getString("confirmDialogBad.text"), fileToCheck.getName());
			System.out.println(message);
		}
	}

	/**
	 *
	 * This method send help response.
	 *
	 */
	public static void help()
	{
		System.out.println("usage :");
		System.out.println("Siba :");
		System.out.println("Siba [-h |-help| --help]");
		System.out.println("siba backup directoryToSave [target]");
		System.out.println("siba check [filename | filename.tgz | filename.tgz.md5]");
	}

	/**
	 *
	 */
	public static void manageSibaCLIException()
	{
		// Set default CLI catch.
		Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler()
		{
			@Override
			public void uncaughtException(final Thread thread, final Throwable exception)
			{
				String message;
				if (exception instanceof OutOfMemoryError)
				{
					message = "Java ran out of memory!\n\n";
				}
				else
				{
					message = "An error occured: " + exception.getClass() + "(" + exception.getMessage() + ")";
				}

				logger.error("uncaughtException ", exception);
				logger.error(message);
				logger.info(BUNDLE.getString("UnexpectedError.text"));
			}
		});
	}

	/**
	 *
	 * This method launch CLI.
	 *
	 * @param args
	 */
	public static void run(final String[] args)
	{
		try
		{
			manageSibaCLIException();
			// This part implements an automate.
			int parameterCount = args.length;
			if (parameterCount == 0)
			{
				help();
			}
			else if (StringUtils.equals(args[0], "-h") || StringUtils.equals(args[0], "-help")
					|| StringUtils.equals(args[0], "--help"))
			{
				help();
			}
			else if (StringUtils.equals(args[0], "backup"))
			{
				if (parameterCount == 1)
				{
					backup(null, null);
				}
				else if (parameterCount == 2)
				{
					backup(new File(args[1]));
				}
				else if (parameterCount == 3)
				{
					backup(new File(args[1]), new File(args[2]));
				}
				else
				{
					throw new SibaException(BUNDLE.getString("ToManyParameter.text")); //$NON-NLS-1$
				}
			}
			else if (StringUtils.equals(args[0], "check"))
			{
				if (parameterCount == 1)
				{
					check(null);
				}
				else if (parameterCount == 2)
				{
					String fileToCheckName;
					if (!args[1].endsWith("tgz") && !args[1].endsWith("md5"))
					{
						fileToCheckName = args[1].concat(".tgz.md5");
					}
					else if (args[1].endsWith("tgz"))
					{
						fileToCheckName = args[1].concat(".md5");
					}
					else
					{
						fileToCheckName = args[1];
					}
					File fileToCheck = new File(fileToCheckName);
					check(fileToCheck);
				}
				else
				{
					throw new SibaException(BUNDLE.getString("ToManyParameter.text")); //$NON-NLS-1$
				}
			}
			else
			{
				System.out.println(BUNDLE.getString("badUsage.text"));
				help();
			}

		}
		catch (SibaException exception)
		{
			System.err.println("SibaException = " + exception.getMessage());
			logger.error(exception.getMessage(), exception);
			help();
		}
	}
}