/*
 * Smart GWT (GWT for SmartClient)
 * Copyright 2008 and beyond, Isomorphic Software, Inc.
 *
 * Smart GWT is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 3
 * as published by the Free Software Foundation.  Smart GWT is also
 * available under typical commercial license terms - see
 * http://smartclient.com/license
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 */

package com.smartgwt.sample.showcase.client.miniapp;

import com.smartgwt.client.data.DataSource;
import com.smartgwt.client.data.Record;
import com.smartgwt.client.types.Alignment;
import com.smartgwt.client.widgets.Label;
import com.smartgwt.client.widgets.form.DynamicForm;
import com.smartgwt.client.widgets.form.fields.*;
import com.smartgwt.client.widgets.form.fields.events.ClickEvent;
import com.smartgwt.client.widgets.form.fields.events.ClickHandler;
import com.smartgwt.client.widgets.tab.Tab;
import com.smartgwt.client.widgets.tab.TabSet;
import com.smartgwt.client.widgets.tab.events.TabSelectedEvent;
import com.smartgwt.client.widgets.tab.events.TabSelectedHandler;
import com.smartgwt.client.widgets.viewer.DetailViewer;

import java.util.HashMap;
import java.util.Map;

public class ItemDetailTabPane extends TabSet {

    private DetailViewer itemViewer;
    private DynamicForm editorForm;
    private Label editorLabel;
    private ItemListGrid itemListGrid;

    public ItemDetailTabPane(DataSource supplyItemDS, DataSource supplyCategoryDS, ItemListGrid itemListGrid) {
        this.itemListGrid = itemListGrid;
        itemViewer = new DetailViewer();
        itemViewer.setDataSource(supplyItemDS);
        itemViewer.setWidth100();
        itemViewer.setMargin(25);
        itemViewer.setEmptyMessage("Select an item to view its details");

        editorLabel = new Label();
        editorLabel.setWidth100();
        editorLabel.setHeight100();
        editorLabel.setAlign(Alignment.CENTER);
        editorLabel.setContents("Select a record to edit, or a category to insert a new record into");

        editorForm = new DynamicForm();
        editorForm.setWidth(650);
        editorForm.setMargin(25);
        editorForm.setNumCols(4);
        editorForm.setCellPadding(5);
        editorForm.setAutoFocus(false);
        editorForm.setDataSource(supplyItemDS);
        editorForm.setUseAllDataSourceFields(true);

        TextItem sku = new TextItem("SKU", "SKU");
        TextAreaItem description = new TextAreaItem("description");
        description.setWidth(300);
        description.setRowSpan(3);

        IPickTreeItem category = new IPickTreeItem("category");
        category.setWidth(140);
        category.setDataSource(supplyCategoryDS);
        category.setEmptyMenuMessage("No Sub Categories");
        category.setCanSelectParentItems(true);

        SpinnerItem unitCost = new SpinnerItem("unitCost");
        unitCost.setStep(0.01);

        CheckboxItem inStock = new CheckboxItem("inStock");

        DateItem nextShipment = new DateItem("nextShipment");
        nextShipment.setUseTextField(true);

        ButtonItem saveButton = new ButtonItem("saveItem", "Save Item");
        saveButton.setAlign(Alignment.CENTER);
        saveButton.setWidth(100);
        saveButton.setColSpan(4);
        saveButton.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
                editorForm.saveData();
            }
        });

        editorForm.setFields(sku, description, category, unitCost, inStock, nextShipment, saveButton);
        editorForm.setColWidths(100, 200, 100, 200);


        Tab viewTab = new Tab("View");
        viewTab.setIcon("silk/application_form.png", 16);
        viewTab.setWidth(70);
        viewTab.setPane(itemViewer);

        Tab editTab = new Tab("Edit");
        editTab.setIcon("demoApp/icon_edit.png", 16);
        editTab.setWidth(70);
        editTab.setPane(editorForm);

        setTabs(viewTab, editTab);

        addTabSelectedHandler(new TabSelectedHandler() {
            public void onTabSelected(TabSelectedEvent event) {
                updateDetails();
            }
        });
    }


    public void clearDetails(Record selectedCategoryRecord) {
        int selectedTab = getSelectedTabNumber();
        if (selectedTab == 0) {
            //view tab : show empty message
            itemViewer.setData((Record[]) null);
        } else {
            // edit tab : show new record editor, or empty message
            if (selectedCategoryRecord != null) {
                updateTab(1, editorForm);
                Map initialValues = new HashMap();
                initialValues.put("category", selectedCategoryRecord.getAttribute("categoryName"));
                editorForm.editNewRecord(initialValues);
            } else {
                updateTab(1, editorLabel);
            }
        }
    }

    public void updateDetails() {
        Record selectedRecord  = itemListGrid.getSelectedRecord();
        int selectedTab = getSelectedTabNumber();
        if (selectedTab == 0) {
            //view tab : show empty message
            itemViewer.setData(new Record[]{selectedRecord});
        } else {
            // edit tab : show record editor
            editorForm.editRecord(selectedRecord);
        }
    }
}