/**

  * SQL-DK

  * Copyright © 2015 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, version 3 of the License.

  *

  * 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.formatting;

 import info.globalcode.sql.dk.ColorfulPrintWriter;

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

 import static info.globalcode.sql.dk.formatting.CommonProperties.COLORFUL;

 import static info.globalcode.sql.dk.formatting.CommonProperties.COLORFUL_DESCRIPTION;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 /**

  * Prints results in the recfile format. This format is both human- and machine- readable. Can be

  * processed by the <a href="https://www.gnu.org/software/recutils/">GNU Recutils</a>

  * or <a href="https://relational-pipes.globalcode.info/">Relational pipes</a>.

  *

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

  */

 @PropertyDeclaration(name = COLORFUL, defaultValue = "false", type = Boolean.class, description = COLORFUL_DESCRIPTION)

 public class RecfileFormatter extends AbstractFormatter {

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

 	public static final String NAME = "recfile"; // bash-completion:formatter

 	private final ColorfulPrintWriter out;

 	private boolean firstResult = true;

 	public RecfileFormatter(FormatterContext formatterContext) {

 		super(formatterContext);

 		out = new ColorfulPrintWriter(formatterContext.getOutputStream());

 		out.setColorful(formatterContext.getProperties().getBoolean(COLORFUL, false));

 	}

 	@Override

 	public void writeStartResultSet(ColumnsHeader header) {

 		super.writeStartResultSet(header);

 		printResultSeparator();

 		out.print(ColorfulPrintWriter.TerminalColor.Red, "%rec: ");

 		printRecfileValue(getCurrentRelationName());

 		// TODO: declare attribute data types where jdbc→recfile mapping is possible

 	}

 	@Override

 	public void writeStartRow() {

 		super.writeStartRow();

 		println();

 	}

 	@Override

 	public void writeColumnValue(Object value) {

 		super.writeColumnValue(value);

 		String columnName = getCurrentColumnsHeader().getColumnDescriptors().get(getCurrentColumnsCount() - 1).getLabel();

 		out.print(ColorfulPrintWriter.TerminalColor.Green, columnName + ": ");

 		printRecfileValue(value);

 	}

 	@Override

 	public void writeUpdatesResult(int updatedRowsCount) {

 		super.writeUpdatesResult(updatedRowsCount);

 		printResultSeparator();

 		log.log(Level.INFO, "Updated records: {0}", updatedRowsCount);

 	}

 	@Override

 	public void writeEndBatch() {

 		super.writeEndBatch();

 		println();

 	}

 	private void println() {

 		out.println();

 		out.flush();

 	}

 	private void printRecfileValue(Object value) {

 		if (value == null) {

 			// TODO: null values in recfiles?

 		} else {

 			for (char ch : value.toString().toCharArray()) {

 				out.print(ch);

 				if (ch == '\n') {

 					out.print(ColorfulPrintWriter.TerminalColor.Magenta, "+ ");

 				}

 			}

 		}

 		println();

 	}

 	private void printResultSeparator() {

 		if (firstResult) {

 			firstResult = false;

 		} else {

 			println();

 		}

 	}

 }