/*
 * Copyright 2010 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.gwt.sample.expenses.gwt.ui.report;

import com.google.gwt.app.client.EditorSupport;
import com.google.gwt.app.place.RecordEditView;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.DivElement;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.Style.Display;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.sample.expenses.gwt.request.EmployeeRecord;
import com.google.gwt.sample.expenses.gwt.request.ReportRecord;
import com.google.gwt.sample.expenses.gwt.ui.employee.EmployeeRenderer;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.InlineLabel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.ValueListBox;
import com.google.gwt.user.datepicker.client.DateBox;

import java.util.Collection;
import java.util.Map;

/**
 * Edit view for employee records.
 */
public class ReportEditView extends Composite implements
    RecordEditView<ReportRecord> {
  interface Binder extends UiBinder<HTMLPanel, ReportEditView> {
  }

  interface DataBinder extends EditorSupport<ReportRecord, ReportEditView> {
  }

  private static final Binder BINDER = GWT.create(Binder.class);
  private static final DataBinder DATA_BINDER = GWT.create(DataBinder.class);

  @UiField TextBox notes;
  @UiField TextBox purpose;
  @UiField(provided = true) ValueListBox<EmployeeRecord> reporter =
    new ValueListBox<EmployeeRecord>(EmployeeRenderer.instance());
  @UiField(provided = true) ValueListBox<EmployeeRecord> approvedSupervisor =
    new ValueListBox<EmployeeRecord>(EmployeeRenderer.instance());
  @UiField DateBox created;
  @UiField Button cancel;
  @UiField Button save;
  @UiField InlineLabel id;
  @UiField InlineLabel version;
  @UiField DivElement errors;
  @UiField Element editTitle;
  @UiField Element createTitle;

  private Delegate delegate;

  private ReportRecord record;

  public ReportEditView() {
    initWidget(BINDER.createAndBindUi(this));
    DATA_BINDER.init(this);
  }

  public ReportEditView asWidget() {
    return this;
  }

  public String[] getPaths() {
    return DATA_BINDER.getPaths();
  }

  public ReportRecord getValue() {
    return record;
  }

  public boolean isChanged() {
    return DATA_BINDER.isChanged(this);
  }

  public void setCreating(boolean creating) {
    if (creating) {
      editTitle.getStyle().setDisplay(Display.NONE);
      createTitle.getStyle().clearDisplay();
    } else {
      editTitle.getStyle().clearDisplay();
      createTitle.getStyle().setDisplay(Display.NONE);
    }
  }

  public void setDelegate(Delegate delegate) {
    this.delegate = delegate;
  }

  public void setEmployeePickerValues(Collection<EmployeeRecord> values) {
    approvedSupervisor.setAcceptableValues(values);
    reporter.setAcceptableValues(values);
  }

  public void setEnabled(boolean enabled) {
    DATA_BINDER.setEnabled(this, enabled);
    save.setEnabled(enabled);
  }

  public void setValue(ReportRecord value) {
    this.record = value;
    DATA_BINDER.setValue(this, value);
  }

  public void showErrors(Map<String, String> errorMap) {
    DATA_BINDER.showErrors(this, errorMap);
  }

  @UiHandler("cancel")
  void onCancel(@SuppressWarnings("unused") ClickEvent event) {
    delegate.cancelClicked();
  }

  @UiHandler("save")
  void onSave(@SuppressWarnings("unused") ClickEvent event) {
    delegate.saveClicked();
  }
}