/**
 * DataCleaner (community edition)
 * Copyright (C) 2014 Neopost - Customer Information Management
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.datacleaner.widgets;

import java.awt.BorderLayout;

import javax.swing.JButton;

import org.apache.metamodel.util.Action;
import org.apache.metamodel.util.HasName;
import org.apache.metamodel.util.SimpleTableDef;
import org.datacleaner.bootstrap.WindowContext;
import org.datacleaner.panels.DCPanel;
import org.datacleaner.util.SchemaFactory;
import org.datacleaner.util.WidgetFactory;
import org.datacleaner.windows.CouchDbDatastoreDialog;
import org.datacleaner.windows.MongoDbDatastoreDialog;
import org.datacleaner.windows.TableDefinitionDialog;

/**
 * A widget used for selecting whether to automatically discover or to manually
 * create table definitions for a particular datastore, eg. in the
 * {@link MongoDbDatastoreDialog} or {@link CouchDbDatastoreDialog}.
 */
public class TableDefinitionOptionSelectionPanel extends DCPanel {

    public enum TableDefinitionOption implements HasName {
        AUTOMATIC, MANUAL;

        @Override
        public String getName() {
            if (this == AUTOMATIC) {
                return "Automatic discovery";
            }
            return "Manual definition";
        }
    }

    private static final long serialVersionUID = 1L;
    private final DCComboBox<TableDefinitionOption> _comboBox;
    private final JButton _configureButton;
    private final DCLabel _label;
    private final WindowContext _windowContext;
    private final Action<SimpleTableDef[]> _saveAction;
    private SimpleTableDef[] _tableDefs;

    public TableDefinitionOptionSelectionPanel(final WindowContext windowContext, final SchemaFactory schemaFactory,
            final SimpleTableDef[] tableDefs) {
        super();
        _windowContext = windowContext;
        _tableDefs = tableDefs;
        _label = DCLabel.bright("Loading...");

        _saveAction = this::setTableDefs;

        _comboBox = new DCComboBox<>(TableDefinitionOption.values());
        _comboBox.setRenderer(new EnumComboBoxListRenderer());
        _configureButton = WidgetFactory.createSmallButton("images/menu/options.png");
        _configureButton.setText("Define");

        _configureButton.addActionListener(e -> {
            final TableDefinitionDialog dialog =
                    new TableDefinitionDialog(_windowContext, schemaFactory, _tableDefs, _saveAction);
            dialog.setVisible(true);
        });
        if (tableDefs != null && tableDefs.length > 0) {
            _comboBox.setSelectedItem(TableDefinitionOption.MANUAL);
        } else {
            _comboBox.setSelectedItem(TableDefinitionOption.AUTOMATIC);
        }
        _comboBox.addListener(item -> updateComponents());
        updateComponents();

        setLayout(new BorderLayout(4, 0));
        add(_comboBox, BorderLayout.CENTER);
        add(_configureButton, BorderLayout.EAST);
        add(_label, BorderLayout.SOUTH);
    }

    private void updateComponents() {
        if (_comboBox.getSelectedItem() == TableDefinitionOption.AUTOMATIC) {
            _configureButton.setEnabled(false);
            _label.setText("(Tables will be automatically discovered)");
        } else {
            _configureButton.setEnabled(true);
            if (_tableDefs == null || _tableDefs.length == 0) {
                _label.setText("(no tables defined)");
            } else {
                _label.setText("(" + _tableDefs.length + " tables defined)");
            }
        }
    }

    public SimpleTableDef[] getTableDefs() {
        if (_comboBox.getSelectedItem() == TableDefinitionOption.AUTOMATIC) {
            return null;
        }
        return _tableDefs;
    }

    public void setTableDefs(final SimpleTableDef[] tableDefs) {
        _tableDefs = (tableDefs == null ? new SimpleTableDef[0] : tableDefs);
        updateComponents();
    }
}