/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
 * Software engineering by Intevation GmbH
 *
 * This file is Free Software under the GNU AGPL (>=v3)
 * and comes with ABSOLUTELY NO WARRANTY! Check out the
 * documentation coming with Dive4Elements River for details.
 */

package org.dive4elements.river.client.client.ui.uinfo;

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

import org.dive4elements.river.client.client.ui.AbstractUIProvider;
import org.dive4elements.river.client.shared.model.Data;
import org.dive4elements.river.client.shared.model.DataItem;
import org.dive4elements.river.client.shared.model.DataList;
import org.dive4elements.river.client.shared.model.DefaultData;
import org.dive4elements.river.client.shared.model.DefaultDataItem;

import com.google.gwt.core.client.GWT;
import com.smartgwt.client.data.Record;
import com.smartgwt.client.types.ListGridFieldType;
import com.smartgwt.client.widgets.Button;
import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.Label;
import com.smartgwt.client.widgets.events.ClickEvent;
import com.smartgwt.client.widgets.events.ClickHandler;
import com.smartgwt.client.widgets.form.DynamicForm;
import com.smartgwt.client.widgets.form.fields.TextItem;
import com.smartgwt.client.widgets.form.validator.IsIntegerValidator;
import com.smartgwt.client.widgets.form.validator.IsStringValidator;
import com.smartgwt.client.widgets.form.validator.Validator;
import com.smartgwt.client.widgets.grid.ListGrid;
import com.smartgwt.client.widgets.grid.ListGridField;
import com.smartgwt.client.widgets.grid.ListGridRecord;
import com.smartgwt.client.widgets.grid.events.RecordClickEvent;
import com.smartgwt.client.widgets.grid.events.RecordClickHandler;
import com.smartgwt.client.widgets.layout.HLayout;
import com.smartgwt.client.widgets.layout.VLayout;

public class VegetationzonesTable extends AbstractUIProvider {
    private static final long serialVersionUID = 1L;

    protected ListGrid elements;
    private TextItem vegzone;
    private TextItem start;
    private TextItem end;
    private ListGrid table;

    private TextItem createItem(final String identifier, final String title, final int width, final Validator... validator) {
        final TextItem item = new TextItem(identifier, title);
        item.setWidth(width);
        item.setWrapTitle(false);
        item.setValidators(validator);// eigentlich überflüssig, oder?
        return item;
    }

    public Canvas createWidget(final DataList data) {

        final VLayout root = new VLayout();
        final HLayout input = new HLayout();
        final VLayout tableLayout = new VLayout();
        final HLayout fields = new HLayout();
        final HLayout fields2 = new HLayout();
        final VLayout spacer = new VLayout();
        spacer.setHeight(10);

        final Button add = new Button(this.MSG.add_date()); // TODO: make key more generic or change to more specific
        this.elements = new ListGrid();

        final Label title = new Label(data.get(0).getDescription());
        title.setHeight("35px"); // orig:25

        this.vegzone = createItem("uinfo_vegetation_zone_label", this.MSG.uinfo_vegetation_zone_label(), 200, new IsStringValidator());
        this.start = createItem("uinfo_vegetation_zones_from", this.MSG.uinfo_vegetation_zones_from(), 40, new IsIntegerValidator());
        this.end = createItem("uinfo_vegetation_zones_to", this.MSG.uinfo_vegetation_zones_to(), 40, new IsIntegerValidator());

        final DynamicForm form1 = new DynamicForm();
        final DynamicForm form2 = new DynamicForm();
        form2.setNumCols(5);
        form1.setNumCols(7);
        form1.setFields(this.vegzone);
        form2.setFields(this.start, this.end);

        add.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(final ClickEvent ce) {
                final String v1 = VegetationzonesTable.this.start.getValueAsString();
                final String v2 = VegetationzonesTable.this.end.getValueAsString();
                final String v3 = VegetationzonesTable.this.vegzone.getValueAsString();
                if (v1 == null || v2 == null || v3 == null) {
                    return;
                }

                final ListGridRecord r = new ListGridRecord();
                r.setAttribute("vegzone", v3);
                r.setAttribute("from", v1);
                r.setAttribute("to", v2);
                VegetationzonesTable.this.elements.addData(r);
            }
        });

        final Label sel = new Label(this.MSG.select());
        sel.setHeight(25);
        this.elements.setWidth(450); // 185
        this.elements.setHeight(500); // 120
        this.elements.setShowHeaderContextMenu(false);
        this.elements.setCanReorderFields(false);
        this.elements.setCanSort(false);
        this.elements.setCanEdit(false);
        final ListGridField vegzone = new ListGridField("vegzone", this.MSG.uinfo_vegetation_zones_label());
        final ListGridField from = new ListGridField("from", this.MSG.uinfo_vegetation_zones_from());
        final ListGridField to = new ListGridField("to", this.MSG.uinfo_vegetation_zones_to());
        vegzone.setWidth(285);
        from.setWidth(70);
        to.setWidth(70);

        final ListGridField removeField = new ListGridField("_removeRecord", "Remove Record") {
            {
                setType(ListGridFieldType.ICON);
                setIcon(GWT.getHostPageBaseURL() + VegetationzonesTable.this.MSG.removeFeature());
                setCanEdit(false);
                setCanFilter(false);
                setCanSort(false);
                setCanGroupBy(false);
                setCanFreeze(false);
                setWidth(25);
            }
        };

        this.elements.addRecordClickHandler(new RecordClickHandler() {
            @Override
            public void onRecordClick(final RecordClickEvent event) {
                // Just handle remove-clicks
                if (!event.getField().getName().equals(removeField.getName())) {
                    return;
                }
                event.getViewer().removeData(event.getRecord());
            }
        });

        this.elements.setFields(vegzone, from, to, removeField);

        fields.addMember(form1);
        fields2.addMember(form2);
        // fields2.addMember(add);

        tableLayout.addMember(this.elements);
        root.addMember(title);
        root.addMember(input);
        root.addMember(tableLayout);
        root.addMember(spacer);
        root.addMember(fields);
        root.addMember(fields2);
        root.addMember(spacer);
        root.addMember(add);
        root.addMember(spacer);
        root.addMember(spacer);

        return root;
    }

    @Override
    public Canvas createOld(final DataList dataList) {
        final HLayout layout = new HLayout();
        layout.setWidth("400px");
        final VLayout vLayout = new VLayout();
        vLayout.setWidth(130);
        final Label label = new Label(dataList.getLabel());
        label.setWidth("200px");
        label.setHeight(25);

        final List<Data> items = dataList.getAll();
        final Data str = getData(items, "vegzones");
        final DataItem[] strItems = str.getItems();

        final String[] entries = strItems[0].getLabel().split(";");
        for (final String entry : entries) {
            final String[] vals = entry.split(",");
            final Label dateLabel = new Label(vals[0] + " - " + vals[1]);
            dateLabel.setHeight(20);
            vLayout.addMember(dateLabel);
        }
        final Canvas back = getBackButton(dataList.getState());
        layout.addMember(label);
        layout.addMember(vLayout);
        layout.addMember(back);

        return layout;
    }

    @Override
    public Canvas create(final DataList data) {
        final VLayout layout = new VLayout();
        final Canvas helper = createHelper();
        this.helperContainer.addMember(helper);

        final Canvas submit = getNextButton();
        final Canvas widget = createWidget(data);

        layout.addMember(widget);
        layout.addMember(submit); // TODO: SUBMIT

        // fetchSedimentLoadData(); //TODO: feed from database...

        return layout;
    }

    private Canvas createHelper() {
        this.table = new ListGrid();
        this.table.setShowHeaderContextMenu(false);
        this.table.setWidth100();
        this.table.setShowRecordComponents(true);
        this.table.setShowRecordComponentsByCell(true);
        this.table.setHeight100();
        this.table.setEmptyMessage(this.MSG.empty_table());
        this.table.setCanReorderFields(false);

        /* Input support pins */
        // final String baseUrl = GWT.getHostPageBaseURL();
        // final ListGridField pinFrom = new ListGridField("fromIcon", this.MSG.uinfo_vegetation_zones_from());
        // pinFrom.setWidth(300);
        // pinFrom.setType(ListGridFieldType.ICON);
        // pinFrom.setCellIcon(baseUrl + this.MSG.markerGreen());
        //
        // final ListGridField pinTo = new ListGridField("toIcon", this.MSG.uinfo_vegetation_zones_to());
        // pinTo.setType(ListGridFieldType.ICON);
        // pinTo.setWidth(300);
        // pinTo.setCellIcon(baseUrl + this.MSG.markerRed());
        //
        // pinFrom.addRecordClickHandler(new RecordClickHandler() {
        // @Override
        // public void onRecordClick(final RecordClickEvent e) {
        // final Record r = e.getRecord();
        // VegetationzonesTable.this.vegzone.setValue(r.getAttribute("date")); // date??
        // }
        // });
        //
        // pinFrom.addRecordClickHandler(new RecordClickHandler() {
        // @Override
        // public void onRecordClick(final RecordClickEvent e) {
        // final Record r = e.getRecord();
        // VegetationzonesTable.this.start.setValue(r.getAttribute("date"));
        // }
        // });
        //
        // pinTo.addRecordClickHandler(new RecordClickHandler() {
        // @Override
        // public void onRecordClick(final RecordClickEvent e) {
        // final Record r = e.getRecord();
        // VegetationzonesTable.this.end.setValue(r.getAttribute("date"));
        // }
        // });
        //
        // final ListGridField date = new ListGridField("date", this.MSG.year());
        // date.setType(ListGridFieldType.TEXT);
        // date.setWidth(100);
        //
        // final ListGridField descr = new ListGridField("description", this.MSG.description());
        // descr.setType(ListGridFieldType.TEXT);
        // descr.setWidth("*");
        //
        // this.table.setFields(pinFrom, pinTo, date, descr);
        return this.table;
    }

    @Override
    protected Data[] getData() {
        final List<Data> data = new ArrayList<Data>();

        final ListGridRecord[] lgr = this.elements.getRecords();
        if (lgr.length == 0) {
            return new Data[0];
        }
        String d = "";
        for (final ListGridRecord element : lgr) {
            final Record r = element;
            d += r.getAttribute("vegzone") + "," + r.getAttribute("from") + "," + r.getAttribute("to");
            d += ";";
        }

        final DataItem item = new DefaultDataItem("vegzones", null, d); // DATA-key
        data.add(new DefaultData("vegzones", null, null, new DataItem[] { item }));
        return data.toArray(new Data[data.size()]);
    }

}