// Copyright (C) 2009 The Android Open Source Project
//
// 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.gerrit.client.ui;

import com.google.gerrit.client.Gerrit;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.CloseEvent;
import com.google.gwt.event.logical.shared.CloseHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.FocusWidget;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwtexpui.globalkey.client.GlobalKey;
import com.google.gwtexpui.user.client.AutoCenterDialogBox;

public abstract class CommentedActionDialog extends AutoCenterDialogBox
    implements CloseHandler<PopupPanel> {
  protected final FlowPanel panel;
  protected final Button sendButton;
  protected final Button cancelButton;
  protected final FlowPanel buttonPanel;
  protected final FlowPanel contentPanel;
  protected FocusWidget focusOn;

  protected boolean sent;

  public CommentedActionDialog(final String title, final String heading) {
    super(/* auto hide */ false, /* modal */ true);
    setGlassEnabled(true);
    setText(title);

    addStyleName(Gerrit.RESOURCES.css().commentedActionDialog());

    sendButton = new Button(Util.C.commentedActionButtonSend());
    sendButton.addClickHandler(
        new ClickHandler() {
          @Override
          public void onClick(final ClickEvent event) {
            enableButtons(false);
            onSend();
          }
        });

    cancelButton = new Button(Util.C.commentedActionButtonCancel());
    cancelButton.getElement().getStyle().setProperty("float", "right");
    cancelButton.addClickHandler(
        new ClickHandler() {
          @Override
          public void onClick(final ClickEvent event) {
            hide();
          }
        });

    contentPanel = new FlowPanel();
    contentPanel.setStyleName(Gerrit.RESOURCES.css().commentedActionMessage());

    buttonPanel = new FlowPanel();
    buttonPanel.add(sendButton);
    buttonPanel.add(cancelButton);
    buttonPanel.getElement().getStyle().setProperty("marginTop", "4px");

    panel = new FlowPanel();
    if (heading != null) {
      panel.add(new SmallHeading(heading));
    }
    panel.add(contentPanel);
    panel.add(buttonPanel);
    add(panel);

    addCloseHandler(this);
  }

  public void setFocusOn(FocusWidget focusWidget) {
    focusOn = focusWidget;
  }

  public void enableButtons(boolean enable) {
    sendButton.setEnabled(enable);
    cancelButton.setEnabled(enable);
  }

  @Override
  public void center() {
    super.center();
    GlobalKey.dialog(this);
    if (focusOn != null) {
      focusOn.setFocus(true);
    }
  }

  @Override
  public void onClose(CloseEvent<PopupPanel> event) {
    sent = false;
  }

  public abstract void onSend();
}