/**

 * 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, 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.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();

		}

	}

}