/*
 * Copyright (C) 2020 Christian Pierre MOMON <christian.momon@devinsy.fr>
 * 
 * This file is part of AgirStatool, simple key value database.
 * 
 * AgirStatool 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.
 * 
 * AgirStatool 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 AgirStatool.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.april.agirstatool.cli;

import java.io.File;
import java.sql.Connection;
import java.time.LocalDateTime;

import org.apache.commons.lang3.StringUtils;
import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.PropertyConfigurator;
import org.april.agirstatool.core.AgirStatool;
import org.april.agirstatool.core.AgirStatoolException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import fr.devinsy.strings.StringList;
import fr.devinsy.strings.StringsUtils;
import utils.BuildInformation;

/**
 * The Class <code>JugaCLI</code> manages a Command Line Interface for Juga.
 * 
 */
public final class AgiStatoolCLI
{
	private static Logger logger = LoggerFactory.getLogger(AgiStatoolCLI.class);

	/**
	 * Instantiates a new JugaCLI.
	 */
	private AgiStatoolCLI()
	{
	}

	/**
	 * This method displays the CLI help.
	 * 
	 */
	public static void help()
	{
		StringList message = new StringList();

		message.append("AgirStatool CLI version ").appendln(BuildInformation.instance().version());
		message.appendln("Usage:");
		message.appendln("    agirstatool [ -h | -help | --help ]");
		message.appendln("    agirstatool -c configurationFilename clear");
		message.appendln("    agirstatool -c configurationFilename update");
		message.appendln("    agirstatool -c configurationFilename projects");

		System.out.println(message.toString());
	}

	/**
	 * The main method.
	 * 
	 * @param args
	 *            the arguments
	 */
	public static void main(final String[] args)
	{
		// Configure log.
		File loggerConfig = new File("log4j.properties");
		if (loggerConfig.exists())
		{
			PropertyConfigurator.configure(loggerConfig.getAbsolutePath());
			logger.info("Dedicated log configuration done.");
			logger.info("Configuration file was found in [{}].", loggerConfig.getAbsoluteFile());
		}
		else
		{
			BasicConfigurator.configure();
			// logger.info("Basic log configuration done.");
			// logger.info("Configuration file was not found in [{}].",
			// loggerConfig.getAbsoluteFile());
		}

		// Run.
		AgiStatoolCLI.run(args);
	}

	/**
	 * 
	 * This method launch CLI.
	 * 
	 * @param args
	 *            necessary arguments
	 */
	public static void run(final String[] args)
	{
		try
		{
			// Set default 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 = String.format("An error occured: %1s(%2s)", exception.getClass(), exception.getMessage());
					}

					logger.error("uncaughtException ", exception);
					logger.error(message);
					logger.info("Oups, an unexpected error occured. Please try again.");
				}
			});

			System.out.println(LocalDateTime.now() + " AgirStatool call: " + new StringList(args).toStringSeparatedBy(" "));

			// logger.info("Single connection opened with [{}].", this.url);

			// This part implements an automate.
			int parameterCount = args.length;
			switch (parameterCount)
			{
				case 0:
				{
					help();
				}
				break;

				case 1:
				{
					String token = args[0];
					if (StringsUtils.containsAny(token, "-h", "-help", "--help"))
					{
						help();
					}
					else
					{
						throw new AgirStatoolException("Bad usage.");
					}
				}
				break;

				case 3:
				{
					String token = args[0];
					String configurationFilename = args[1];
					String command = args[2];
					if ((StringUtils.equals(token, "-c")) && (StringsUtils.containsAny(command, "clear", "refresh", "update", "projects", "projects+")))
					{
						File configurationFile = new File(configurationFilename);
						if (!configurationFile.exists())
						{
							throw new AgirStatoolException("Configuration file does not exist.");
						}
						else if (!configurationFile.isFile())
						{
							throw new AgirStatoolException("Configuration file is not a file.");
						}
						else
						{
							// Apply -c parameter.
							File log4jfile = new File(configurationFile.getParentFile(), "log4j.properties");
							if (log4jfile.exists())
							{
								logger.info("Applying configuration file found in [{}].", log4jfile.getAbsoluteFile());
								PropertyConfigurator.configure(log4jfile.getAbsolutePath());
								logger.info("Configuration log configuration done.");
							}

							switch (command)
							{
								case "clear":
								break;

								case "refresh":
								case "update":
								{
									System.out.println("Update command…");
									AgirStatoolConfigFile config = new AgirStatoolConfigFile(configurationFile);
									Connection connection = SQLUtils.getConnexion(config.getDabataseUrl(), config.getDabataseName(), config.getDabataseLogin(), config.getDabatasePassword());
									AgirStatool statool = new AgirStatool(connection, new File(config.getTargetDirectory()));
									statool.doRefreshPages();
								}
								break;

								case "projects":
								{
									System.out.println("projects command…");
									AgirStatoolConfigFile config = new AgirStatoolConfigFile(configurationFile);
									Connection connection = SQLUtils.getConnexion(config.getDabataseUrl(), config.getDabataseName(), config.getDabataseLogin(), config.getDabatasePassword());
									AgirStatool statool = new AgirStatool(connection, new File(config.getTargetDirectory()));
									StringList lines = statool.doBuildTextProjectList();
									System.out.println(lines);
								}
								break;

								case "projects+":
								{
									System.out.println("projects+ command…");
									AgirStatoolConfigFile config = new AgirStatoolConfigFile(configurationFile);
									Connection connection = SQLUtils.getConnexion(config.getDabataseUrl(), config.getDabataseName(), config.getDabataseLogin(), config.getDabatasePassword());
									AgirStatool statool = new AgirStatool(connection, new File(config.getTargetDirectory()));
									StringList lines = statool.doBuildTextProjectExtendedList();
									System.out.println(lines);
								}
								break;
							}
						}
					}
					else
					{
						System.out.println("Bad usage detected.");
						help();
					}
				}
				break;

				default:
				{
					throw new AgirStatoolException("Bad parameter count.");
				}
			}

			logger.info("Finished.");
			System.out.println("Finished.");
		}
		catch (AgirStatoolException exception)
		{
			System.err.println("AgirStatoolException = " + exception.getMessage());
			logger.error(exception.getMessage(), exception);
			help();
		}
	}
}