package de.intevation.flys.client.client.ui.map;

import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.Window;

import com.smartgwt.client.util.SC;
import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.form.DynamicForm;
import com.smartgwt.client.widgets.form.fields.TextItem;
import com.smartgwt.client.widgets.form.fields.ButtonItem;
import com.smartgwt.client.widgets.form.fields.events.ClickEvent;
import com.smartgwt.client.widgets.form.fields.events.ClickHandler;
import com.smartgwt.client.types.Alignment;

import org.gwtopenmaps.openlayers.client.Bounds;
import org.gwtopenmaps.openlayers.client.Map;

import de.intevation.flys.client.client.Config;
import de.intevation.flys.client.client.FLYSConstants;
import de.intevation.flys.client.client.services.CollectionAttributeService;
import de.intevation.flys.client.client.services.CollectionAttributeServiceAsync;
import de.intevation.flys.client.shared.model.Collection;
import de.intevation.flys.client.shared.model.OutputSettings;
import de.intevation.flys.client.shared.model.Property;
import de.intevation.flys.client.shared.model.PropertySetting;
import de.intevation.flys.client.shared.model.Settings;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;

public class MapPrintPanel extends Canvas {

    private static final String MAPFISH_MAPTITLE = "mapfish-mapTitle";
    private static final String MAPFISH_RANGE = "mapfish-range";
    private static final String MAPFISH_SUBTITLE = "mapfish-subtitle";
    private static final String MAPFISH_STRETCH = "mapfish-strech";
    private static final String MAPFISH_CREATED = "mapfish-created";
    private static final String MAPFISH_SOURCE = "mapfish-source";
    private static final String MAPFISH_CREATOR = "mapfish-creator";
    private static final String MAPFISH_DATEPLACE = "mapfish-dateplace";

    protected FLYSConstants MSG = GWT.create(FLYSConstants.class);

    /** CollectionAttribute Update Service. */
    protected CollectionAttributeServiceAsync updater =
        GWT.create(CollectionAttributeService.class);


    protected Collection collection;
    protected Settings settings;
    protected TextItem pageTitle = new TextItem();
    protected TextItem pageRange = new TextItem();
    protected TextItem pageSubtitle = new TextItem();
    protected TextItem pageStrech = new TextItem();
    protected TextItem pageCreated = new TextItem();
    protected TextItem pageSource = new TextItem();
    protected TextItem pageCreator = new TextItem();
    protected TextItem pageDatePlace = new TextItem();
//    protected SelectItem pageFormat = createPageFormatSelectItem();
    protected MapToolbar mapToolbar;
    protected MapPrintWindow parent;

    public MapPrintPanel(Collection collection, MapToolbar mapToolbar, MapPrintWindow parent) {
        this.collection = collection;
        this.mapToolbar = mapToolbar;
        this.parent     = parent;
        initLayout();

        this.settings = collection.getSettings("print-settings");
        if (settings == null) {
            settings = new OutputSettings();
            GWT.log("settings are empty");
        }
        else {
            List<Property> properties = settings.getSettings("default");
            for (Property prop : properties) {
                PropertySetting props = (PropertySetting)prop;
                GWT.log(props.getName() + "=" + props.getValue());
                if (props.getName().equals(MAPFISH_MAPTITLE)) {
                    this.pageTitle.setValue(props.getValue());
                }
                else if (props.getName().equals(MAPFISH_RANGE)) {
                    this.pageRange.setValue(props.getValue());
                }
                else if (props.getName().equals(MAPFISH_SUBTITLE)) {
                    this.pageSubtitle.setValue(props.getValue());
                }
                else if (props.getName().equals(MAPFISH_STRETCH)) {
                    this.pageStrech.setValue(props.getValue());
                }
                else if (props.getName().equals(MAPFISH_CREATED)) {
                    this.pageCreated.setValue(props.getValue());
                }
                else if (props.getName().equals(MAPFISH_SOURCE)) {
                    this.pageSource.setValue(props.getValue());
                }
                else if (props.getName().equals(MAPFISH_CREATOR)) {
                    this.pageCreator.setValue(props.getValue());
                }
                else if (props.getName().equals(MAPFISH_DATEPLACE)) {
                    this.pageDatePlace.setValue(props.getValue());
                } else {
                    GWT.log("Unknown Print property: " + prop.getName());
                }
            }
        }
    }

    protected void initLayout() {
        // TODO: i18n
        this.pageTitle.setTitle("Titel");
        this.pageSubtitle.setTitle("Untertitel");
        this.pageRange.setTitle("Bereich");
        this.pageStrech.setTitle("Strecke");
        this.pageCreated.setTitle("Aufgestellt");
        this.pageSource.setTitle("Datenquelle");
        this.pageCreator.setTitle("Ersteller");
        this.pageDatePlace.setTitle("Ort, Datum");

        ButtonItem printButton = createPrintButtonItem();

        printButton.setAlign(Alignment.RIGHT);

        DynamicForm df = new DynamicForm();
        df.setFields(
//               this.pageFormat,
               this.pageTitle,
               this.pageSubtitle,
               this.pageRange,
               this.pageStrech,
               this.pageCreated,
               this.pageSource,
               this.pageCreator,
               this.pageDatePlace,
               printButton);
        addChild(df);
    }

/*
 * Commented out because we only provide a layout for A4 Landscape atm

    protected SelectItem createPageFormatSelectItem() {
        LinkedHashMap values = new LinkedHashMap();
        // TODO: i18n
        values.put("A4 landscape", "DIN A4 (Querformat)");
        //values.put("A4 portrait", "DIN A4 (Hochformat)");
        //values.put("A0 portrait", "DIN A0 (Hochformat)");

        SelectItem selItem = new SelectItem();
        selItem.setTitle("Seitengröße:"); // TODO: i18n
        selItem.setValueMap(values);
        selItem.setDefaultToFirstOption(true);

        return selItem;
    }
*/
    protected ButtonItem createPrintButtonItem() {
        ButtonItem btn = new ButtonItem();
        GWT.log("Button created");
        btn.addClickHandler(new ClickHandler() {

            public void onClick(ClickEvent event) {
                GWT.log("Print Button Click");
                updateCollection();
                Window.open(createPrintUrl(), "_blank", "");
                parent.destroy();
            }
        });
        btn.setTitle(MSG.print());
        return btn;
    }

    private String createPrintUrl() {
        MapOutputTab ot = (MapOutputTab)mapToolbar.getOutputTab();
        Collection collection = ot.getCollection();
        String uuid = collection.identifier();

        String mapType = collection.getOutputModes().containsKey("floodmap")
            ? "floodmap"
            : "map";

        StringBuilder url = new StringBuilder();
        url.append(GWT.getModuleBaseURL());
        url.append("map-print?");

        Map map = mapToolbar.getMap();
        Bounds bounds = map.getExtent();

        if (bounds != null) {
            try {
                url.append("minx=");
                url.append(bounds.getLowerLeftX());
                url.append("&");

                url.append("maxx=");
                url.append(bounds.getUpperRightX());
                url.append("&");

                url.append("miny=");
                url.append(bounds.getLowerLeftY());
                url.append("&");

                url.append("maxy=");
                url.append(bounds.getUpperRightY());
                url.append("&");
            }
            catch (Exception e) {
                // XXX: Ignore it. bounds.getXXX() throw
                // exceptions when bound is invalid. :-/
            }
        }

        url.append("uuid=");
        url.append(uuid);
        url.append("&maptype=");
        url.append(mapType);

        appendPrintToUrl(collection, url);

        return url.toString();
    }

    private void appendPrintToUrl(Collection collection, StringBuilder url) {
        Settings settings = collection.getSettings("print-settings");
        if (settings != null) {
            List<Property> properties = settings.getSettings("default");
            for (Property prop : properties) {
                PropertySetting props = (PropertySetting)prop;
                url.append("&");
                url.append(props.getName());
                url.append("=");
                url.append(props.getValue());
            }
        }
    }

    protected void updateCollection() {
        final Config config = Config.getInstance();
        final String loc    = config.getLocale();

        GWT.log("MapPrintPanel.updateCollection via RPC now");

        List<Property> properties = new ArrayList<Property>();
        properties.add(new PropertySetting(MAPFISH_MAPTITLE, this.pageTitle.getValueAsString()));
//        properties.add(new PropertySetting(MAPFISH_LAYOUT, this.pageFormat.getValueAsString()));
        properties.add(new PropertySetting(MAPFISH_SUBTITLE, this.pageSubtitle.getValueAsString()));
        properties.add(new PropertySetting(MAPFISH_RANGE, this.pageRange.getValueAsString()));
        properties.add(new PropertySetting(MAPFISH_STRETCH, this.pageStrech.getValueAsString()));
        properties.add(new PropertySetting(MAPFISH_CREATED, this.pageCreated.getValueAsString()));
        properties.add(new PropertySetting(MAPFISH_SOURCE, this.pageSource.getValueAsString()));
        properties.add(new PropertySetting(MAPFISH_CREATOR, this.pageCreator.getValueAsString()));
        properties.add(new PropertySetting(MAPFISH_DATEPLACE, this.pageDatePlace.getValueAsString()));
        settings.setSettings("default", properties);

        collection.addSettings("print-settings", settings);
        updater.update(collection, loc, new AsyncCallback<Collection>() {
            @Override
            public void onFailure(Throwable caught) {
                GWT.log("Could not update collection attributes.");
                SC.warn(MSG.getString(caught.getMessage()));
            }
            @Override
            public void onSuccess(Collection collection) {
                GWT.log("MapPrint: collection attributes updated");
            }
        });
    }
}