/*
 * Copyright 2010 JBoss Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.drools.guvnor.client.qa.testscenarios;

import java.util.Date;

import org.drools.guvnor.client.common.ErrorPopup;
import org.drools.guvnor.client.common.SmallLabel;
import org.drools.guvnor.client.messages.Constants;
import org.drools.guvnor.client.resources.Images;
import org.drools.guvnor.client.util.Format;
import org.drools.ide.common.client.modeldriven.testing.ExecutionTrace;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.VerticalPanel;

/**
 * Created by IntelliJ IDEA.
 * User: nheron
 * Date: 7 nov. 2009
 * Time: 19:32:35
 * To change this template use File | Settings | File Templates.
 */
public class ExecutionWidget extends Composite {

    private Constants            constants = GWT.create( Constants.class );
    private static Images        images    = GWT.create( Images.class );

    private final ExecutionTrace executionTrace;

    public ExecutionWidget(final ExecutionTrace executionTrace,
                           boolean showResults) {

        this.executionTrace = executionTrace;

        final HorizontalPanel simulDatePanel = simulDate();
        simulDatePanel.setVisible( isScenarioSimulatedDateSet() );

        final ListBox choice = new ListBox();

        choice.addItem( constants.UseRealDateAndTime() );
        choice.addItem( constants.UseASimulatedDateAndTime() );
        choice.setSelectedIndex( (executionTrace.getScenarioSimulatedDate() == null) ? 0 : 1 );
        choice.addChangeHandler( new ChangeHandler() {

            public void onChange(ChangeEvent event) {
                if ( choice.getSelectedIndex() == 0 ) {
                    simulDatePanel.setVisible( false );
                    executionTrace.setScenarioSimulatedDate( null );
                } else {
                    simulDatePanel.setVisible( true );
                }
            }
        } );

        HorizontalPanel layout = new HorizontalPanel();
        layout.add( new Image( images.executionTrace() ) );
        layout.add( choice );
        layout.add( simulDatePanel );

        if ( showResults && isResultNotNullAndHaveRulesFired() ) {
            VerticalPanel replacingLayout = new VerticalPanel();

            replacingLayout.add( new FiredRulesPanel( executionTrace ) );
            replacingLayout.add( layout );
            initWidget( replacingLayout );
        } else {
            initWidget( layout );
        }
    }

    private boolean isResultNotNullAndHaveRulesFired() {
        return executionTrace.getExecutionTimeResult() != null && executionTrace.getNumberOfRulesFired() != null;
    }

    private boolean isScenarioSimulatedDateSet() {
        return executionTrace.getScenarioSimulatedDate() != null;
    }

    private HorizontalPanel simulDate() {
        HorizontalPanel horizontalPanel = new HorizontalPanel();
        final String format = "dd-MMM-YYYY"; //NON-NLS
        final TextBox textBox = new TextBox();
        if ( executionTrace.getScenarioSimulatedDate() == null ) {
            textBox.setText( "<" + format + ">" );
        } else {
            textBox.setText( executionTrace.getScenarioSimulatedDate().toLocaleString() );
        }
        final SmallLabel dateHint = new SmallLabel();
        textBox.addKeyUpHandler( new KeyUpHandler() {

            public void onKeyUp(KeyUpEvent event) {
                try {
                    Date d = new Date( textBox.getText() );
                    dateHint.setText( d.toLocaleString() );
                } catch ( Exception e ) {
                    dateHint.setText( "..." );
                }
            }
        } );

        textBox.addChangeHandler( new ChangeHandler() {

            public void onChange(ChangeEvent event) {
                if ( textBox.getText().trim().equals( "" ) ) {
                    textBox.setText( constants.currentDateAndTime() );
                } else {
                    try {
                        Date date = new Date( textBox.getText() );
                        executionTrace.setScenarioSimulatedDate( date );
                        textBox.setText( date.toLocaleString() );
                        dateHint.setText( "" );
                    } catch ( Exception e ) {
                        ErrorPopup.showMessage( Format.format( constants.BadDateFormatPleaseTryAgainTryTheFormatOf0(),
                                                               format ) );
                    }
                }
            }
        } );
        horizontalPanel.add( textBox );
        horizontalPanel.add( dateHint );
        return horizontalPanel;
    }

}