/*
 * Copyright (c) 2011, H.Westphal
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * * Neither the name of the jo-widgets.org nor the
 *   names of its contributors may be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

package org.jowidgets.addons.map.common.widget;

import org.jowidgets.addons.map.common.IAvailableCallback;
import org.jowidgets.addons.map.common.IDesignationListener;
import org.jowidgets.addons.map.common.IMap;
import org.jowidgets.addons.map.common.IMapContext;
import org.jowidgets.api.toolkit.Toolkit;
import org.jowidgets.common.widgets.controller.IInputListener;
import org.jowidgets.tools.controller.InputObservable;
import org.jowidgets.tools.validation.ValidationCache;
import org.jowidgets.tools.validation.ValidationCache.IValidationResultCreator;
import org.jowidgets.tools.widgets.invoker.ColorSettingsInvoker;
import org.jowidgets.tools.widgets.invoker.VisibiliySettingsInvoker;
import org.jowidgets.tools.widgets.wrapper.ControlWrapper;
import org.jowidgets.util.NullCompatibleEquivalence;
import org.jowidgets.validation.IValidationConditionListener;
import org.jowidgets.validation.IValidationResult;
import org.jowidgets.validation.IValidator;
import org.jowidgets.validation.tools.CompoundValidator;

import de.micromata.opengis.kml.v_2_2_0.KmlFactory;
import de.micromata.opengis.kml.v_2_2_0.Placemark;
import de.micromata.opengis.kml.v_2_2_0.Point;

final class PointInputControl extends ControlWrapper implements IPointInputControl {

    private static final String PLACEMARK_ID = PointInputControl.class.getSimpleName();

    private final InputObservable inputObservable = new InputObservable();;
    private final CompoundValidator<Point> compoundValidator = new CompoundValidator<Point>();
    private final ValidationCache validationCache;

    private IMapContext mapContext;
    private Point value;
    private Point lastUnmodifiedValue;
    private boolean editable;

    PointInputControl(final Object parentUiReference, final IPointInputControlBlueprint descriptor) {
        super(Toolkit.getWidgetFactory().create(
                parentUiReference,
                Toolkit.getBluePrintProxyFactory().bluePrint(IMapWidgetBlueprint.class)));

        VisibiliySettingsInvoker.setVisibility(descriptor, this);
        ColorSettingsInvoker.setColors(descriptor, this);

        setValue(descriptor.getValue());
        setEditable(descriptor.isEditable());

        final IValidator<Point> validator = descriptor.getValidator();
        if (validator != null) {
            addValidator(validator);
        }

        validationCache = new ValidationCache(new IValidationResultCreator() {
            @Override
            public IValidationResult createValidationResult() {
                return compoundValidator.validate(getValue());
            }
        });

        resetModificationState();
        validationCache.setDirty();

        ((IMap) getWidget()).initialize(new IAvailableCallback() {
            @Override
            public void onAvailable(final IMapContext mapContext) {
                PointInputControl.this.mapContext = mapContext;
                updateValue(true);
                setEditable(editable);
            }
        });
    }

    @Override
    public void setValue(final Point value) {
        setValue(value, true);
    }

    private void setValue(final Point value, final boolean flyTo) {
        if (!NullCompatibleEquivalence.equals(this.value, value)) {
            this.value = value;
            inputObservable.fireInputChanged();
            validationCache.setDirty();
            updateValue(flyTo);
        }
    }

    private void updateValue(final boolean flyTo) {
        if (mapContext != null) {
            mapContext.removeFeature(PLACEMARK_ID);
            if (value != null) {
                final Placemark placemark = KmlFactory.createPlacemark();
                placemark.setId(PLACEMARK_ID);
                placemark.setGeometry(value);
                mapContext.addFeature(placemark);
                if (flyTo) {
                    mapContext.flyTo(PLACEMARK_ID, 250000);
                }
            }
        }
    }

    @Override
    public Point getValue() {
        return value;
    }

    @Override
    public void setEditable(final boolean editable) {
        if (mapContext != null) {
            if (editable && !mapContext.isDesignationRunning()) {
                mapContext.startDesignation(Point.class, new IDesignationListener<Point>() {
                    @Override
                    public void onDesignation(final Point object) {
                        setValue(object, false);
                    }
                });
            }
            else if (!editable && mapContext.isDesignationRunning()) {
                mapContext.endDesignation();
            }
        }
        this.editable = editable;
    }

    @Override
    public boolean isEditable() {
        return editable;
    }

    @Override
    public IValidationResult validate() {
        return validationCache.validate();
    }

    @Override
    public void addValidationConditionListener(final IValidationConditionListener listener) {
        validationCache.addValidationConditionListener(listener);
    }

    @Override
    public void removeValidationConditionListener(final IValidationConditionListener listener) {
        validationCache.removeValidationConditionListener(listener);
    }

    @Override
    public void addValidator(final IValidator<Point> validator) {
        compoundValidator.addValidator(validator);
    }

    @Override
    public boolean hasModifications() {
        return !NullCompatibleEquivalence.equals(lastUnmodifiedValue, getValue());
    }

    @Override
    public void resetModificationState() {
        lastUnmodifiedValue = value;
    }

    @Override
    public void addInputListener(final IInputListener listener) {
        inputObservable.addInputListener(listener);
    }

    @Override
    public void removeInputListener(final IInputListener listener) {
        inputObservable.removeInputListener(listener);
    }

}