/*******************************************************************************
 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
 * in Industry THTH ry.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.simulation.ui.handlers.e4;

import javax.annotation.PostConstruct;
import javax.inject.Inject;

import org.eclipse.e4.core.di.annotations.CanExecute;
import org.eclipse.e4.core.di.annotations.Execute;
import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.e4.ui.di.UIEventTopic;
import org.eclipse.e4.ui.model.application.MApplication;
import org.eclipse.e4.ui.model.application.ui.MUILabel;
import org.eclipse.e4.ui.model.application.ui.menu.MHandledItem;
import org.eclipse.e4.ui.workbench.modeling.EModelService;
import org.eclipse.osgi.util.NLS;
import org.simantics.Simantics;
import org.simantics.simulation.SimulationEvents;
import org.simantics.simulation.experiment.ExperimentUtil;
import org.simantics.simulation.experiment.IExperiment;
import org.simantics.simulation.experiment.SimulationTimeUtil;
import org.simantics.simulation.project.IExperimentManager;
import org.simantics.simulation.ui.preferences.SimulationPreferenceUtil;
import org.simantics.simulation.ui.preferences.SimulationPreferences;

public class Step {

    static final String HANDLED_ITEM_ID = "org.simantics.simulation.ui.handledtoolitem.step";

    @Inject
    EModelService modelService;

    @PostConstruct
    public void updateToolTip(MApplication application) {
        MHandledItem handledItem = (MHandledItem) modelService.find(HANDLED_ITEM_ID, application);
        if (handledItem != null) {
            updateItem(handledItem);
        }
    }

    @CanExecute
    public boolean canExecute() {
        IExperimentManager manager = Simantics.getProject().getHint(IExperimentManager.KEY_EXPERIMENT_MANAGER);
        if (manager == null)
            return false;
        IExperiment experiment = manager.getActiveExperiment();
        if (experiment == null)
            return false;
        return true;
    }

    @Execute
    public void execute() {
        SimulationPreferences prefs = SimulationPreferenceUtil.getPrefs();
        switch (prefs.stepMode) {
        case DURATION:
            ExperimentUtil.step(prefs.stepDuration);
            break;
        case END_TIME:
            ExperimentUtil.stepUntil(prefs.stepEndTime);
            break;
        }
    }

    @Inject
    @Optional
    public void updateElement(@Optional @UIEventTopic(SimulationEvents.TOPIC_STEP_CHANGE) Object changed, MApplication application) {
        MHandledItem handledItem = (MHandledItem) modelService.find(HANDLED_ITEM_ID, application);
        if (handledItem != null) {
            updateItem(handledItem);
        }
    }

    private static void updateItem(MUILabel item) {
        SimulationPreferences prefs = SimulationPreferenceUtil.getPrefs();
        switch (prefs.stepMode) {
        case DURATION:
            item.setTooltip(
                    NLS.bind("Step {0} s ({1})",
                            SimulationTimeUtil.formatSeconds(prefs.stepDuration),
                            SimulationTimeUtil.formatHMSS(prefs.stepDuration)));
            break;
        case END_TIME:
            item.setTooltip(
                    NLS.bind("Step Until Simulation Time Reaches {0} s ({1})",
                            SimulationTimeUtil.formatSeconds(prefs.stepEndTime),
                            SimulationTimeUtil.formatHMSS(prefs.stepEndTime)));
            break;
        }
    }

}