/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.usergrid.chop.webapp.view.chart.layout.item;

import com.vaadin.ui.AbsoluteLayout;
import com.vaadin.ui.Button;
import com.vaadin.ui.TextArea;
import com.vaadin.ui.themes.Reindeer;
import org.apache.usergrid.chop.webapp.dao.NoteDao;
import org.apache.usergrid.chop.webapp.dao.model.Note;
import org.apache.usergrid.chop.webapp.service.InjectorFactory;
import org.apache.usergrid.chop.webapp.view.util.UIUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;

public class NoteLayout extends AbsoluteLayout {

    private static final Logger LOG = LoggerFactory.getLogger(NoteLayout.class);

    private NoteDao noteDao = InjectorFactory.getInstance(NoteDao.class);
    private TextArea textArea;
    private Button editButton;
    private Button saveButton;
    private Button cancelButton;

    private String commitId;
    private int runNumber;
    private String oldText;

    public NoteLayout() {
        init();
        addButtons();
        textArea = UIUtil.addTextArea(this, "", "left: 0px; top: 35px;", "250px", "100px", true);
    }

    private void init() {
        setWidth("250px");
        setHeight("250px");
    }

    private void addButtons() {

        UIUtil.addLabel(this, "Note:", "left: 0px; top: 10px;", "120px");

        editButton = createButton("Edit", "left: 210px; top: 10px;", true);
        editButton.addClickListener(new Button.ClickListener() {
            public void buttonClick(Button.ClickEvent event) {
                edit();
            }
        });

        saveButton = createButton("Save", "left: 170px; top: 10px;", false);
        saveButton.addClickListener(new Button.ClickListener() {
            public void buttonClick(Button.ClickEvent event) {
                save();
                cancel();
            }
        });

        cancelButton = createButton("Cancel", "left: 210px; top: 10px;", false);
        cancelButton.addClickListener(new Button.ClickListener() {
            public void buttonClick(Button.ClickEvent event) {
                restoreText();
                cancel();
            }
        });
    }

    private void restoreText() {
        textArea.setValue(oldText);
    }

    private Button createButton(String caption, String position, boolean visible) {

        Button button = UIUtil.addButton(this, caption, position, "50px");
        button.setStyleName(Reindeer.BUTTON_LINK);
        button.setVisible(visible);

        return button;
    }

    private void edit() {
        editButton.setVisible(false);
        saveButton.setVisible(true);
        cancelButton.setVisible(true);
        textArea.setReadOnly(false);
    }

    private void cancel() {
        editButton.setVisible(true);
        saveButton.setVisible(false);
        cancelButton.setVisible(false);
        textArea.setReadOnly(true);
    }

    private void save() {

        Note note = new Note(commitId, runNumber, textArea.getValue());

        try {
            noteDao.save(note);
        } catch (IOException e) {
            LOG.error("Exception while saving a note: ", e);
        }
    }

    private void doLoad(String commitId, int runNumber) {

        this.commitId = commitId;
        this.runNumber = runNumber;

        Note note = noteDao.get(commitId, runNumber);
        oldText = note != null ? note.getText() : "";

        textArea.setReadOnly(false);
        textArea.setValue(oldText);
    }

    public void load(String commitId, int runNumber) {
        doLoad(commitId, runNumber);
        cancel();
    }

}