/**
 * 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 java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.util.EnumSet;
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;

	public InfoLister(PrintStream out) {
		this.out = out;
	}

	public void showInfo(CLIOptions options) {
		EnumSet<CLIOptions.INFO_TYPE> infoTypes = options.getShowInfo();
		for (CLIOptions.INFO_TYPE infoType : infoTypes) {
			switch (infoType) {
				/**
				 * TODO: implement show info
				 */
				case FORMATTERS:
					println("TODO: list available formatters");
					break;
				case HELP:
					println("TODO: show some help");
					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:
					println("TODO: list databases");
					break;
				case CONNECTION:
					println("TODO: test database connection: " + options.getDatabaseNameToTest());
					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);
	}
}