/**

  * SQL-DK

  * Copyright © 2013 František Kučera (frantovo.cz)

  *

  * This program is free software: you can redistribute it and/or modify

  * it under the terms of the GNU 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 General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with this program. If not, see <http://www.gnu.org/licenses/>.

  */

 package info.globalcode.sql.dk;

 import info.globalcode.sql.dk.configuration.Configuration;

 import info.globalcode.sql.dk.configuration.ConfigurationException;

 import info.globalcode.sql.dk.configuration.ConfigurationProvider;

 import info.globalcode.sql.dk.configuration.DatabaseDefinition;

 import info.globalcode.sql.dk.configuration.FormatterDefinition;

 import static info.globalcode.sql.dk.Functions.rpad;

 import java.io.BufferedReader;

 import java.io.InputStreamReader;

 import java.io.PrintStream;

 import java.sql.SQLException;

 import java.util.EnumSet;

 import java.util.List;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 /**

  * Displays info like help, version etc.

  *

  * @author Ing. František Kučera (frantovo.cz)

  */

 public class InfoLister {

 	private static final Logger log = Logger.getLogger(InfoLister.class.getName());

 	private PrintStream out;

 	private ConfigurationProvider configurationProvider;

 	public InfoLister(PrintStream out, ConfigurationProvider configurationProvider) {

 		this.out = out;

 		this.configurationProvider = configurationProvider;

 	}

 	public void showInfo(CLIOptions options) throws ConfigurationException {

 		EnumSet<CLIOptions.INFO_TYPE> infoTypes = options.getShowInfo();

 		for (CLIOptions.INFO_TYPE infoType : infoTypes) {

 			switch (infoType) {

 				/**

 				 * TODO: implement show info

 				 */

 				case FORMATTERS:

 					for (FormatterDefinition fd : configurationProvider.getConfiguration().getBuildInFormatters()) {

 						log.log(Level.INFO, "Built-in formatter:   {0} implemented by class: {1}", new Object[]{rpad(fd.getName(), 16), fd.getClassName()});

 					}

 					List<FormatterDefinition> configuredFormatters = configurationProvider.getConfiguration().getFormatters();

 					for (FormatterDefinition fd : configuredFormatters) {

 						log.log(Level.INFO, "Configured formatter: {0} implemented by class: {1}", new Object[]{rpad(fd.getName(), 16), fd.getClassName()});

 					}

 					if (configuredFormatters.isEmpty()) {

 						log.log(Level.INFO, "No other formatters are configured");

 					}

 					String configuredDefaultFormatter = configurationProvider.getConfiguration().getDefaultFormatter();

 					if (configuredDefaultFormatter == null) {

 						log.log(Level.INFO, "Built-in default formatter: {0}", Configuration.DEFAULT_FORMATTER);

 					} else {

 						log.log(Level.INFO, "Configured default formatter: {0}", configuredDefaultFormatter);

 					}

 					break;

 				case HELP:

 					printResource(Constants.HELP_FILE);

 					break;

 				case LICENSE:

 					printResource(Constants.LICENSE_FILE);

 					break;

 				case TYPES:

 					println("TODO: list supported types");

 					break;

 				case VERSION:

 					printResource(Constants.VERSION_FILE);

 					break;

 				case DATABASES:

 					final List<DatabaseDefinition> configuredDatabases = configurationProvider.getConfiguration().getDatabases();

 					if (configuredDatabases.isEmpty()) {

 						log.log(Level.WARNING, "No databases are configured.");

 					} else {

 						for (DatabaseDefinition dd : configuredDatabases) {

 							log.log(Level.INFO, "Configured database: {0}", dd.getName());

 						}

 					}

 					break;

 				case CONNECTION:

 					boolean connectionTestResult = false;

 					String dbName = options.getDatabaseNameToTest();

 					log.log(Level.FINE, "Testing connection to database: {0}", dbName);

 					try {

 						DatabaseDefinition dd = configurationProvider.getConfiguration().getDatabase(dbName);

 						if (dd == null) {

 							log.log(Level.SEVERE, "No database with this name is configured: {0}", dbName);

 						} else {

 							log.log(Level.FINE, "Database definition was loaded from configuration");

 							DatabaseConnection dc = dd.connect();

 							connectionTestResult = dc.test();

 						}

 					} catch (ConfigurationException | SQLException e) {

 						log.log(Level.SEVERE, "Error during testing connection", e);

 					}

 					log.log(Level.INFO, "Connection test result: {0}", connectionTestResult ? "success" : "failure");

 					break;

 				default:

 					throw new IllegalArgumentException("Unsupported INFO_TYPE: " + infoType);

 			}

 		}

 	}

 	private void printResource(String fileName) {

 		try (BufferedReader reader = new BufferedReader(new InputStreamReader(getClass().getClassLoader().getResourceAsStream(fileName)))) {

 			while (true) {

 				String line = reader.readLine();

 				if (line == null) {

 					break;

 				} else {

 					println(line);

 				}

 			}

 		} catch (Exception e) {

 			log.log(Level.SEVERE, "Unable to print this info. Please see our website for it: " + Constants.WEBSITE, e);

 		}

 	}

 	private void println(String line) {

 		out.println(line);

 	}

 }